Read 140-430 Bearg 2008.qxp text version

Bearing Handbook for Electric Motors

Prolong your life

The life of your electric motors-- with INSOCOAT® bearings from SKF®. Conventional motor bearings get "fried" by the electrical current passing through them. The result is premature failure and high maintenance costs. The SKF® solution is INSOCOAT® inverter-duty bearings that require no rework prior to mounting. These drop-in replacement bearings feature a coating of aluminum oxide on the inner or outer ring, providing an insulating barrier which prevents electrical current from causing microscopic "melting" of the bearing. In addition, INSOCOAT bearings are treated with a sealant that resists humid environments, heat and chemicals. INSOCOAT bearings are 100% performance tested to 1,000 V DC with a minimum ohmic resistance of 50 M and available for shaft diameters up to 155 mm.

SKF USA Inc. www.skfusa.com

Contents

Bearing Installation Tips . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2, 3 Speed Ratings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .4, 5 6200 and 6300 Series . . . . . . . . . . . . . . . . . . . . . . . . . . 6, 7 N, NJ, NU 200 EC and 300 EC Series . . . . . . . . . . . . . . . 8, 9 Shaft and Housing Diameters 6200 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 10 6300 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 11 N, NJ, NU 200 EC Series . . . . . . . . . . . . . . . . . . . . . . . . . . 12 N, NJ, NU 300 EC Series . . . . . . . . . . . . . . . . . . . . . . . . . . 13 Shaft Shoulder Dimensions 6200 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 14 6300 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 15 Minimum Radial Load N, NJ, NU 200 EC Series . . . . . . . . . . . . . . . . . . . . . . . . . . 16 N, NJ, NU 300 EC Series . . . . . . . . . . . . . . . . . . . . . . . . . . 17 Grease Relube Recommendations 6200 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 18 6300 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 19 N, NJ, NU 200 EC Series . . . . . . . . . . . . . . . . . . . . . . . . . . 20 N, NJ, NU 300 EC Series . . . . . . . . . . . . . . . . . . . . . . . . . . 21 Vibration Frequencies 6200 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 22 6300 Series . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 23 N, NJ, NU 200 EC Series . . . . . . . . . . . . . . . . . . . . . . . . . . 24 N, NJ, NU 300 EC Series . . . . . . . . . . . . . . . . . . . . . . . . . . 25 ABMA-SKF Product Comparison . . . . . . . . . . . . . . . . . . . . . 26, 27

1

Installation tips for reliable bearing operation

1. Handle with care. Never pound directly on a bearing or ring. If a bearing is dropped, it is best not to install it. Store bearings horizontally in a dry place in their original unopened package and never place bearings on a dirty surface; periodically turn over sealed and shielded bearings to prevent grease from settling to one side. 2. Inspect the shaft and housing. Check for size and damage; remove nicks and burrs with emery paper, and wipe clean with a soft cloth. Replace or repair shafts and housings showing obvious signs of wear or damage. A shaft placed in a vise for mounting should be protected from vise jaws with a sheet of soft metal. 3. Avoid overheating. During heat-mounting operations, never bring a flame in direct contact with the bearing and never heat beyond 230°F. Also, immediately hold a heat-mounted bearing in place against the shaft shoulder until it cools and locks in place. Otherwise, the bearing may creep away from the proper position. 4. Use identical replacement bearings. Replacement bearings should be identical to the bearings they replace. Contact an SKF Authorized Distributor or SKF for interchange information. 5. Use the right tool for the job. Induction heaters, oil injection kits, and hydraulic nuts are among the specialized tools available for mounting and dismounting bearings over 4 in. O.D. Their use lowers the possibility of damaging bearings and speeds the process. 6. Pay attention to the bearing's press fit. For bearings with an O.D. less than 4 inches, cold mounting with a press or appropriate mounting tool is acceptable. Pressure should be applied to the ring with the interference fit, or both the inner ring and outer ring simultaneously to avoid Brinelling the raceways. Applying pressure to the ring with the loose fit only will Brinell the raceways and result in noise and potentially premature failure.

2

7. The contact between the bearing ring and a properly machined and dimensioned bearing seat should not require the use of bonding agents to prevent movement or turning. 8. Don't wash new bearings. Bearing manufacturers take great care to package and ship bearings that are dirt-free and ready for lubrication. There's usually no need to wash them or remove the protective slushing compound. 9. Proper lubrication is critical. Bearing manufacturers evaluate several factors before determining the type of lubricant required for specific bearings. Be sure to follow their recommendations. Temperature and contamination conditions will influence the frequency of lubrication changes. 10. Rotate idle bearings. Bearings installed in equipment that is subject to vibration while the shafts are stationary may incur false brinelling damage, which also occurs when equipment is not properly protected during shipment. It can appear as bright, polished depressions on the inner and/or outer races, as well as on the rolling elements. 11. Look for danger signs. Keep alert for three sure signs of improper bearing operation: excessive noise and increases in vibration and temperature. Troubleshooting instruments like hand-held vibration pens, digital thermometers, and electronic stethoscopes help spot bearings in poor operating conditions. 12. Find the cause of bearing failures. Bearings are built to last, so frequent failures may point to an installation or lubrication problem. SKF bearing analysis experts can identify the cause of bearing failure and help you prevent it in the future.

3

Speed ratings

There is a speed limit to which rolling bearings can be operated. Generally, it is the operating temperature that can be permitted with respect to the lubricant being used or to the material of the bearing components that sets the limit. The speed at which this limiting bearing temperature is reached depends on the frictional heat generated in the bearing (including any externally applied heat) and the amount of heat that can be transported away from the bearing. Bearing type and size, internal design, load, lubrication and cooling conditions as well as cage design, accuracy and internal clearance all play a part in determining speed capability. In the accompanying tables two speeds are listed: (Thermal) Reference Speed and (Kinematic) Limiting Speed. Warning: The new Reference and Limiting Speeds are not to be used as a direct substitution for the previous Oil and Grease speed ratings. Consult SKF to determine the actual reference speed limit for your operating conditions.

Reference speeds

The reference speed for a given bearing represents the permissible operating speed of said bearing when subjected to the specific operating conditions of load, lubrication type and method as outlined in ISO 15312. This standard has been established for oil lubrication but is also valid for grease and uses the following reference conditions: · A temperature increase of 90° F (50° C) above an ambient temperature of 68° F (20° C), (thus a bearing temperature of 158° F (70° C), measured on the bearing stationary outer ring or housing washer. · Radial bearing: a constant radial load, being 5% of the basic static load rating Co. · Thrust bearing: a constant axial load, being 2% of the basic static load rating Co. · Open bearings with Normal clearance. For oil lubricated bearings: · Lubricant: mineral oil without EP-additives having a kinematic viscosity at 158° F (70° C) of: v = 12 mm2/s (ISO VG32) for radial bearings, and v = 24 mm2/s (ISO VG68) for thrust roller bearings · Oil bath with the oil reaching up to the middle of the rolling element in the lowest position. For grease lubricated bearings: · Regular lithium soap grease with mineral base oil having a viscosity of 100 to 200 mm2/s at 104° F (40° C) (e.g. ISO VG 150). · Filling approximately 30% of the free space in the bearing. The reference speed will be reached after 10 to 20 hours running time. Under these specific conditions the reference speed for oil and grease lubrication will be equal.

4

Speeds above the reference speed

It is possible to operate bearings at speeds above the reference speed if the bearing friction can be reduced, for example by lubrication systems with small, accurately measured quantities of lubricant or when heat can be removed from the bearing by circulating oil lubrication with cooling of the oil, by cooling ribs on the housing, or by directed cooling air streams. Any increase in speed above the reference speed without taking any of these precautions would only cause bearing temperature to rise excessively. An increase of bearing temperature means that lubricant viscosity is lowered and film formation is made more difficult, leading to even higher friction and further temperature increases. If, at the same time, the operational clearance in the bearing is reduced because of increased inner ring temperature, the final consequence would be bearing seizure.

Limiting speeds

The speed limit is determined by criteria that include: the stability and or strength of the cage, lubrication of cage guiding surfaces, centrifugal and gyratory forces acting on the rolling elements, and other speed-limiting factors. Experience gained from laboratory tests and practical applications indicates that there are maximum speeds that should not be exceeded for technical reasons or because of the very high costs involved. Limiting Speeds shown in the tables are based on the demands of high speed running applications and are valid only for the specific design and cage design shown in the tables. It is possible to run bearings faster than the limiting speeds, but several factors must be reviewed and improved such as the running accuracy, cage material, lubrication, heat dissipation and design of the bearing. It is therefore advisable to contact SKF Applications Engineering for advice. For enclosed and open bearings using grease lubrication, additional parameters have to be considered such as lubrication of cage guiding surfaces and the shear strength of the lubricant, which is determined by the base oil and thickener. Open balls bearings with low friction typically have Reference Speeds greater than the Limiting Speed. In these cases the permissible speed must be calculated from the operating conditions and the lower value between the permissible and Limiting speed used.

5

Speed ratings (RPM) Deep groove ball bearings 6200 & 6300 series

double sealed limiting r/min double shielded limiting r/min open limiting r/min reference speed r/min

Bearing

6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6224 6226 6228 6230 6232 6234 6236 6238 6240

17,000 15,000 13,000 12,000 10,000 8,500 7,500 6,300 5,600 5,000 4,800 4,300 4,000 3,600 3,400 3,200 3,000 2,800 2,600 2,400 2,400 2,200 ­ ­ ­ ­ ­ ­ ­ ­ ­ ­

28,000 26,000 22,000 19,000 17,000 14,000 12,000 10,000 9,000 8,500 8,000 7,000 6,300 6,000 5,600 5,300 4,800 4,500 4,300 4,000 3,800 3,600 3,400 3,200 3,000 ­ ­ ­ ­ ­ ­ ­

34,000 32,000 28,000 24,000 20,000 18,000 15,000 13,000 11,000 11,000 10,000 9,000 8,000 7,500 7,000 6,700 6,000 5,600 5,300 5,000 4,800 4,500 4,300 4,000 3,600 3,400 3,200 3,000 3,800 3,600 3,400 3,200

56,000 50,000 43,000 38,000 32,000 28,000 24,000 20,000 18,000 17,000 15,000 14,000 13,000 12,000 11,000 10,000 9,500 9,000 8,500 8,000 7,500 7,000 6,700 6,300 5,600 5,300 5,000 4,500 4,300 4,000 3,800 3,600

Warning: The new reference and limiting speeds are not to be used as a direct substitution for the previous oil and grease speed ratings. See page 4/5 or contact SKF Applications Engineering.

6

Speed Ratings (RPM) Deep groove ball bearings 6200 & 6300 series

double sealed limiting r/min double shielded limiting r/min open limiting r/min reference speed r/min

Bearing

6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321 6322 6324 6326 6328 6330 6332 6334 6336 6338

15,000 14,000 12,000 11,000 9,500 7,500 6,300 6,000 5,000 4,500 4,300 3,800 3,400 3,200 3,000 2,800 2,600 2,400 2,400 2,200 ­ ­ ­ ­ ­ ­ ­ ­ ­ ­ ­

26,000 22,000 19,000 17,000 15,000 13,000 11,000 9,500 8,500 7,500 6,700 6,300 5,600 5,300 5,000 4,500 4,300 4,000 3,800 3,600 3,400 3,200 ­ ­ ­ ­ ­ ­ ­ ­ ­

32,000 28,000 24,000 22,000 19,000 16,000 13,000 12,000 11,000 9,500 8,500 8,000 7,000 6,700 6,300 5,600 5,300 5,000 4,800 4,500 4,300 4,000 3,800 3,400 3,200 4,300 4,000 3,800 3,400 3,200 3,000

50,000 45,000 38,000 34,000 30,000 24,000 20,000 19,000 17,000 15,000 13,000 12,000 11,000 10,000 9,500 9,000 8,500 8,000 7,500 7,000 6,700 6,300 6,000 5,600 5,000 4,800 4,300 4,000 3,800 3,600 3,400

Note: Low-friction seals (2RZ, 2RSL) and double shielded bearings use same speed ratings. Single enclosure (Z, RSL, RZ) and open bearings use the same speed ratings.

7

Speed ratings (RPM) Cylindrical roller bearings N, NJ, NU 200 EC series

reference speed r/min limiting speed r/min

Bearing

202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 224 226 228 230 232 234 236 238 240

EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC ECMA ECMA ECMA

22,000 19,000 16,000 14,000 13,000 11,000 9,500 9,000 8,500 7,500 6,700 6,300 6,000 5,600 5,300 4,800 4,500 4,300 4,000 3,800 3,600 3,400 3,200 2,800 2,600 2,400 2,200 2,200 2,000 1,900

26,000 22,000 19,000 16,000 14,000 12,000 11,000 9,500 9,000 8,000 7,500 6,700 6,300 6,000 5,600 5,300 5,000 4,800 4,500 4,300 4,000 3,600 3,400 3,200 2,800 2,600 2,400 3,200 3,000 2,800

Warning: The new reference and limiting speeds are not to be used as a direct substitution for the previous oil and grease speed ratings. See page 4/5 or contact SKF Applications Engineering.

8

Speed ratings (RPM) Cylindrical roller bearings N, NJ, NU 300 EC series

reference speed r/min limiting speed r/min

Bearing

303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 324 326 328 330 332 334 336 338 340

EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC EC ECMA

15,000 15,000 12,000 11,000 9,500 8,000 7,500 6,700 6,000 5,600 5,300 4,800 4,500 4,300 4,000 3,800 3,600 3,200 3,200 3,000 2,800 2,400 2,400 2,200 2,000 1,700 1,600 1,500 1,400

20,000 18,000 15,000 12,000 11,000 9,500 8,500 8,000 7,000 6,700 6,000 5,600 5,300 5,000 4,800 4,500 4,300 3,800 3,800 3,400 3,200 3,000 2,800 2,600 2,400 2,200 2,200 2,000 2,400

9

Shaft and housing diameters Deep groove ball bearings 6200 series

bearing bore diameter (mm) shaft diameter (in.) max. min. bearing outside diameter (mm) housing diameter (in.) max. min.

Bearing

6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6224 6226 6228 6230 6232 6234 6236 6238 6240

10 12 15 17 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 170 180 190 200

0.3939 0.4726 0.5908 0.6695 0.7878 0.9847 1.1815 1.3785 1.5753 1.7722 1.9690 2.1660 2.3628 2.5597 2.7565 2.9534 3.1502 3.3472 3.5440 3.7409 3.9377 4.1350 4.3318 4.7255 5.1194 5.5131 5.9071 6.3008 6.6945 7.0882 7.4821 7.8758

0.3936 0.4723 0.5905 0.6692 0.7875 0.9844 1.1812 1.3781 1.5749 1.7718 1.9686 2.1655 2.3623 2.5592 2.7560 2.9529 3.1497 3.3466 3.5434 3.7403 3.9371 4.1344 4.3312 4.7249 5.1187 5.5124 5.9061 6.2998 6.6935 7.0872 7.4810 7.8747

30 32 35 40 47 52 62 72 80 85 90 100 110 120 125 130 140 150 160 170 180 190 200 215 230 250 270 290 310 320 340 360

1.1816 1.2604 1.3786 1.5754 1.8510 2.0479 2.4416 2.8353 3.1503 3.3474 3.5442 3.9379 4.3316 4.7253 4.9223 5.1191 5.5128 5.9065 6.3002 6.6939 7.0876 7.4814 7.8751 8.4657 9.0562 9.8436 10.6312 11.4186 12.2060 12.5998 13.3872 14.1746

1.1811 1.2598 1.3780 1.5748 1.8504 2.0472 2.4409 2.8346 3.1496 3.3465 3.5433 3.9370 4.3307 4.7244 4.9213 5.1181 5.5118 5.9055 6.2992 6.6929 7.0866 7.4803 7.8740 8.4646 9.0551 9.8425 10.6299 11.4173 12.2047 12.5984 13.3858 14.1732

Note: Diameters shown are based on normal loads, operating temperatures, and current industry fitting practices. See SKF Bearing Installation and Maintenance Guide (#140-710) for specific tolerance classes and corresponding fits.

10

Shaft and housing diameters Deep groove ball bearings 6300 series

bearing bore diameter (mm) shaft diameter (in.) max. min. bearing outside diameter (mm) housing diameter (in.) max. min.

Bearing

6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321 6322 6324 6326 6328 6330 6332 6334 6336 6338 6340

10 12 15 17 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 170 180 190 200

0.3939 0.4726 0.5908 0.6695 0.7878 0.9847 1.1815 1.3785 1.5753 1.7722 1.9690 2.1660 2.3628 2.5597 2.7565 2.9534 3.1502 3.3472 3.5440 3.7409 3.9377 4.1350 4.3318 4.7255 5.1194 5.5131 5.9071 6.3008 6.6945 7.0882 7.4821 7.8758

0.3936 0.4723 0.5905 0.6692 0.7875 0.9844 1.1812 1.3781 1.5749 1.7718 1.9686 2.1655 2.3623 2.5592 2.7560 2.9529 3.1497 3.3466 3.5434 3.7403 3.9371 4.1344 4.3312 4.7249 5.1187 5.5124 5.9061 6.2998 6.6935 7.0872 7.4810 7.8747

35 37 42 47 52 62 72 80 90 100 110 120 130 140 150 160 170 180 190 200 215 225 240 260 280 300 320 340 360 380 400 420

1.3786 1.4573 1.6541 1.8510 2.0479 2.4416 2.8353 3.1503 3.5442 3.9379 4.3316 4.7253 5.1191 5.5128 5.9065 6.3002 6.6939 7.0876 7.4814 7.8751 8.4657 8.8594 9.4499 10.2375 11.0249 11.8123 12.5998 13.3872 14.1746 14.9620 15.7494 16.5370

1.3780 1.4567 1.6535 1.8504 2.0472 2.4409 2.8346 3.1496 3.5433 3.9370 4.3307 4.7244 5.1181 5.5118 5.9055 6.2992 6.6929 7.0866 7.4803 7.8740 8.4646 8.8583 9.4488 10.2362 11.0236 11.8110 12.5984 13.3858 14.1732 14.9606 15.7480 16.5354

Note: Diameters shown are based on normal loads, operating temperatures, and current industry fitting practices. See SKF Bearing Installation and Maintenance Guide (#140-710) for specific tolerance classes and corresponding fits.

11

Shaft and housing diameters Cylindrical roller bearings N, NJ, NU 200 EC series

bearing bore diameter (mm) shaft diameter (in.) max. min. bearing outside diameter (mm) housing diameter (in.) max. min.

Bearing

202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 224 226 228 230 232 234 236 238 240

15 17 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 170 180 190 200

0.5911 0.6698 0.7880 0.9849 1.1817 1.3788 1.5756 1.7725 1.9693 2.1667 2.3635 2.5604 2.7574 2.9543 3.1511 3.3483 3.5451 3.7420 3.9388 4.1362 4.3330 4.7267 5.1208 5.5145 5.9082 6.3019 6.6956 7.0893 7.4834 7.8771

0.5906 0.6693 0.7875 0.9844 1.1812 1.3784 1.5752 1.7721 1.9689 2.1662 2.3630 2.5599 2.7567 2.9536 3.1504 3.3474 3.5442 3.7411 3.9379 4.1354 4.3322 4.7259 5.1198 5.5135 5.9072 6.3009 6.6946 7.0883 7.4823 7.8760

35 40 47 52 62 72 80 85 90 100 110 120 125 130 140 150 160 170 180 190 200 215 230 250 270 290 310 320 340 360

1.3786 1.5754 1.8510 2.0479 2.4416 2.8353 3.1503 3.3474 3.5442 3.9379 4.3316 4.7253 4.9223 5.1191 5.5128 5.9065 6.3002 6.6939 7.0876 7.4814 7.8751 8.4657 9.0562 9.8436 10.6312 11.4186 12.2060 12.5998 13.3872 14.1746

1.3780 1.5748 1.8504 2.0472 2.4409 2.8346 3.1496 3.3465 3.5433 3.9370 4.3307 4.7244 4.9213 5.1181 5.5118 5.9055 6.2992 6.6929 7.0866 7.4803 7.8740 8.4646 9.0551 9.8425 10.6299 11.4173 12.2047 12.5984 13.3858 14.1732

Note: Diameters shown are based on normal loads, operating temperatures, and current industry fitting practices. See SKF Bearing Installation and Maintenance Guide (#140-710) for specific tolerance classes and corresponding fits.

12

Shaft and housing diameters Cylindrical roller bearings N, NJ, NU 300 EC series

bearing bore diameter (mm) shaft diameter (in.) max. min. bearing outside diameter (mm) housing diameter (in.) max. min.

Bearing

303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 324 326 328 330 332 334 336 338 340

17 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 170 180 190 200

0.6698 0.7880 0.9849 1.1817 1.3788 1.5756 1.7725 1.9693 2.1667 2.3635 2.5604 2.7574 2.9543 3.1511 3.3483 3.5451 3.7420 3.9388 4.1362 4.3330 4.7267 5.1208 5.5145 5.9082 6.3019 6.6956 7.0893 7.4834 7.8771

0.6693 0.7875 0.9844 1.1812 1.3784 1.5752 1.7721 1.9689 2.1662 2.3630 2.5599 2.7567 2.9536 3.1504 3.3474 3.5442 3.7411 3.9379 4.1354 4.3322 4.7259 5.1198 5.5135 5.9072 6.3009 6.6946 7.0883 7.4823 7.8760

47 52 62 72 80 90 100 110 120 130 140 150 160 170 180 190 200 215 225 240 260 280 300 320 340 360 380 400 420

1.8510 2.0479 2.4416 2.8353 3.1503 3.5442 3.9379 4.3316 4.7253 5.1191 5.5128 5.9065 6.3002 6.6939 7.0876 7.4814 7.8751 8.4657 8.8594 9.4499 10.2375 11.0249 11.8123 12.5998 13.3872 14.1746 14.9620 15.7494 16.5370

1.8504 2.0472 2.4409 2.8346 3.1496 3.5433 3.9370 4.3307 4.7244 5.1181 5.5118 5.9055 6.2992 6.6929 7.0866 7.4803 7.8740 8.4646 8.8583 9.4488 10.2362 11.0236 11.8110 12.5984 13.3858 14.1732 14.9606 15.7480 16.5354

Note: Diameters shown are based on normal loads, operating temperatures, and current industry fitting practices. See SKF Bearing Installation and Maintenance Guide (#140-710) for specific tolerance classes and corresponding fits.

13

Shoulder dimensions for shafts and housings Deep groove ball bearings 6200 series

shaft & housing corner max. in

d Bearing mm

shaft shoulder da da min. max. in in

D mm

housing shoulder Da Da max. min in in

6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220 6221 6222 6224 6226 6228 6230 6232 6234 6236 6238 6240

10 12 15 17 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 170 180 190 200

0.5591 0.6378 0.7559 0.8346 1.0079 1.2047 1.4016 1.6535 1.8504 2.0470 2.2441 2.5197 2.7165 2.9134 3.1102 3.0710 3.5827 3.7795 3.9764 4.2126 4.4094 4.6063 4.8031 5.1969 5.6693 6.0630 6.4567 6.8504 7.3622 7.7559 8.1496 8.5433

0.5906 0.6496 0.7638 0.8661 1.0236 1.2402 1.4216 1.6735 1.8704 2.0670 2.2641 2.5397 2.7365 2.9334 3.1302 3.0910 3.6027 3.7995 4.1339 4.3701 4.6063 4.8819 4.8431 5.2369 5.7093 6.1030 6.4967 6.8904 7.4022 7.7959 8.1896 8.5833

30 32 35 40 47 52 62 72 80 85 90 100 110 120 125 130 140 150 160 170 180 190 200 215 230 250 270 290 310 320

1.0157 1.0945 1.2136 1.4094 1.6299 1.8268 2.2205 2.5591 2.8740 3.0709 3.2677 3.5827 3.9764 4.3701 4.5669 4.7638 5.0787 5.4724 5.8661 6.2205 6.6142 7.0079 7.4016 7.9921 8.5039

0.9757 1.0545 1.1736 1.3694 1.5899 1.7868 2.1805 2.5191 2.8340 3.0309 3.2277 3.5427 3.9364 4.3301 4.5269 4.7238 5.0387 5.4324 5.8261 6.1805 6.5342 6.9279 7.3216 7.9121 8.4239

0.0236 0.0236 0.0236 0.0236 0.0394 0.0394 0.0394 0.0394 0.0394 0.0394 0.0394 0.0591 0.0591 0.0591 0.0591 0.0591 0.0787 0.0787 0.0787 0.0787 0.0787 0.0787 0.0787 0.0787 0.0984 0.0984 0.0984 0.0984 0.1181 0.1181 0.1181 0.1181

9.2913 9.2113 10.0787 9.9987 10.8661 10.7861 11.5354 11.4554 11.9291 11.8491

340 12.7165 12.6365 360 13.5039 13.4239

14

Shoulder dimensions for shafts and housings Deep groove ball bearings 6300 series

shaft & housing corner max. in

d Bearing mm

shaft shoulder da da min. max. in in

D mm

housing shoulder Da Da max. min in in

6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320 6321 6322 6324 6326 6328 6330 6332 6334 6336 6338

10 12 15 17 20 25 30 35 40 45 50 55 60 65 70 75 80 85 90 95 100 105 110 120 130 140 150 160 170 180 190

0.5591 0.6929 0.8110 0.8898 1.0630 1.2598 1.4567 1.7323 1.9291 2.1260 2.3228 2.5984 2.8346 3.0315 3.2283 3.4252 3.6220 3.8976 4.0945 4.2913 4.4882 4.6850 4.8819 5.2756 5.7874 6.1811 6.5748 6.9685 7.3622 7.7559 8.2677

0.6102 0.7129 0.8268 0.9252 1.0830 1.2798 1.4767 1.7523 1.9491 2.1460 2.3428 2.6184 2.8546 3.0515 3.2483 3.4452 3.6420 3.9176 4.1145 4.7244 4.5282 4.7250 4.9219 5.3156 5.8274 6.2211 6.6148 7.0085 7.4022 7.7959 8.3077

35 37 42 47 52 62 72 80 90 100 110 120 130 140 150 160 170 180 190 200

1.2126 1.2362 1.4331 1.6299 1.7717 2.1654 2.5591 2.7953 3.1890 3.5827 3.9764 4.2913 4.6457 5.0394 5.4331 5.8268 6.2205 6.5354 6.9291 7.3228

1.1726 1.1962 1.3931 1.5899 1.7317 2.1254 2.5191 2.7553 3.1490 3.5427 3.9364 4.2513 4.6057 4.9994 5.3931 5.7868 6.1805 6.4554 6.8491 7.2428

0.0236 0.0394 0.0394 0.0394 0.0394 0.0394 0.0394 0.0591 0.0591 0.0591 0.0787 0.0787 0.0787 0.0787 0.0787 0.0787 0.0787 0.0984 0.0984 0.0984 0.0984 0.0984 0.0984 0.0984 0.1181 0.1181 0.1181 0.1181 0.1181 0.1181 0.1575

215 7.9134 7.8334 225 8.3071 8.2271 240 8.8976 8.8176 260 9.6850 9.6050 280 10.3543 10.2743 300 320 340 360 380 11.1417 11.9291 12.7165 13.5039 14.2913 11.0617 11.8491 12.6365 13.4239 14.2113

400 14.9606 14.8806

15

Minimum radial load requirements Cylindrical roller bearings 200 EC series

Bearing

minimum radial load required @ 900 rpm 1800 rpm 3600 rpm

202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 224 226 228 230 232 234 236 238 240

13 lb. 18 23 32 45 61 77 93 106 131 160 189 212 237 273 315 358 405 457 511 567 668 778 936 1098 1282 1457 1610 1849 2087

13 lb. 18 25 32 47 66 81 97 113 142 174 207 232 259 302 349 401 455 515 581 648 769 902 1110 1304 1536 1750 1954 2271 2586

13 lb. 18 27 36 52 70 93 108 128 160 198 239 270 304 356 419 486 554 634 718 810 969

Note: Minimum radial loads are necessary for satisfactory rolling bearing operation. This is particularly true for roller bearings running at high speeds, where inertia forces and friction from the lubricant may cause damaging sliding ­rather than rolling­movements between the rollers and raceways.

16

Minimum radial load requirements Cylindrical roller bearings 300 EC series

Bearing

minimum radial load required @ 900 rpm 1800 rpm 3600 rpm

303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 324 326 328 330 332 334 336 338 340

22 lb. 27 41 57 72 93 115 142 171 203 237 277 317 360 410 459 513 596 655 745 889 1064 1226 1425 1645 1923 2181 2467 2788

22 lb. 30 43 59 77 99 124 153 187 223 261 306 353 405 461 522 587 691 758 868 1044 1275 1469 1726 2024 2429 2766 3170 3620

25 lb. 32 45 66 84 111 140 176 216 261 308 367 430 493 569 648 733 880 965

Note: Minimum radial loads are necessary for satisfactory rolling bearing operation. This is particularly true for roller bearings running at high speeds, where inertia forces and friction from the lubricant may cause damaging sliding ­rather than rolling­movements between the rollers and raceways.

17

Grease relube recommendation Deep groove ball bearings 6200 series

Bearing

quantity 900 rpm

interval @ 1800 rpm

3600 rpm

6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214 6215 6216 6217 6218 6219 6220

.04 .07 .07 .07 .10 .12 .15 .19 .23 .25 .28 .33 .38 .43 .47 .50 .55 .65 .74 .84 .95

oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz.

25,900 hr 25,600 25,200 24,800 24,200 23,600 22,700 21,900 21,100 20,600 20,100 19,400 18,600 17,900 17,500 17,100 16,400 15,800 15,200 14,700 14,100

23,400 hr 22,900 22,200 21,500 20,400 19,400 18,000 16,700 15,600 14,800 14,100 13,100 12,100 11,200 10,700 10,200 9,400 8,730 8,090 7,500 6,950

19,100 hr 18,400 17,300 16,100 14,500 13,100 11,300 9,700 8,510 7,690 6,950 5,970 5,130 4,410 3,980 3,600 3,090 2,660 2,280 1,960

Note: The relubrication intervals shown are based on a good quality lithium based grease at a maximum temperature of 160°F, and a c /p=15. Reduce the interval by half for each 27°F above 160°F, or for vertical applications. (High temperature greases, like polyurea, can operate for longer periods of time than those listed above.) Lubricate more often in applications where there is a risk of heavy solid and chemical contamination. Consult manufacturer or SKF application engineering for details.

LGHP 2 ball and roller bearing grease

LGHP 2 is a polyurea-based grease designed for use in electric motors. Unlike many polyurea-based greases, which are inherently noisy during operation, LGHP 2 meets strict SKF noise requirements. Each batch is blended and selected for consistency and adherence to quietness standards. The grease is also recommended for applications where long life is required. With LGHP 2, users can often avoid compatibility problems when relubricating bearings. LGHP 2 is the factory fill grease used in SKF bearings under the designation GXN.

18

Grease relube recommendation Deep groove ball bearings 6300 series

Bearing

quantity 900 rpm

interval @ 1800 rpm

3600 rpm

6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6315 6316 6317 6318 6319 6320

.07 .07 .11 .11 .12 .16 .21 .26 .32 .39 .46 .54 .63 .72 .81 .92 1.03 1.14 1.26 1.40 1.57

oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz.

25,600 hr 25,300 24,800 24,400 23,900 23,000 22,100 21,400 20,600 19,900 19,100 18,400 17,700 17,100 16,400 15,800 15,200 14,700 14,100 13,600 12,900

22,800 hr 22,400 21,500 20,700 19,900 18,400 17,100 16,000 14,800 13,800 12,800 11,800 11,000 10,200 9,410 8,730 8,090 7,500 6,950 6,440 5,820

18,200 hr 17,400 16,100 15,000 13,800 11,900 10,200 8,950 7,690 6,610 5,680 4,880 4,190 3,600 3,090 2,660 2,280 1,960

Note: The relubrication intervals shown are based on a good quality lithium based grease at a maximum temperature of 160°F, and a c /p=15. Reduce the interval by half for each 27°F above 160°F, or for vertical applications. (High temperature greases, like polyurea, can operate for longer periods of time than those listed above.) Lubricate more often in applications where there is a risk of heavy solid and chemical contamination. Consult manufacturer or SKF application engineering for details.

19

Grease relube recommendation Cylindrical roller bearings N, NJ, NU 200 EC series

Bearing

quantity 900 rpm

interval @ 1800 rpm

3600 rpm

202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220

.07 .07 .10 .12 .15 .19 .23 .25 .28 .33 .38 .43 .47 .50 .55 .65 .74 .84 .95

oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz.

23,700 hr 23,100 22,200 21,400 20,200 19,100 18,200 17,500 16,800 15,900 15,000 14,200 13,700 13,200 12,400 11,700 11,100 10,500 9,900

19,600 hr 18,600 17,200 16,000 14,300 12,700 11,500 10,700 9,900 8,840 7,890 7,040 6,520 6,050 5,400 4,820 4,300 3,840 3,420

13,400 hr 12,100 10,400 8,900 7,090 5,650 4,640 3,980 3,420 2,730 2,170 1,730 1,490 1,280 1,020 810 640

Note: The relubrication intervals shown are based on a good quality lithium based grease at a maximum temperature of 160°F, and a c /p=15. Reduce the interval by half for each 27°F above 160°F, or for vertical applications. (High temperature greases, can operate for longer periods of time than those listed above.) Lubricate more often in applications where there is a risk of heavy solid and chemical contamination. Consult manufacturer or SKF application engineering for details.

20

Grease relube recommendation Cylindrical roller bearings N, NJ, NU 300 EC series

Bearing

quantity 900 rpm

interval @ 1800 rpm

3600 rpm

303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320

.07 .12 .16 .21 .26 .32 .39 .46 .54 .63 .72 .81 .92 1.03 1.14

oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz. oz.

22,500 hr 21,800 20,600 19,500 18,500 17,500 16,500 15,600 14,700 13,900 13,200 12,400 11,700 11,100 10,500 9,900 9,350 8,670

17,600 hr 16,600 14,800 13,200 12,000 10,700 9,530 8,510 7,590 6,780 6,050 5,400 4,820 4,300 3,840 3,420 3,060 2,630

10,800 hr 9,610 7,650 6,090 5,000 3,980 3,170 2,530 2,010 1,600 1,280 1,020 810 640

1.26 oz. 1.40 oz. 1.57 oz.

Note: The relubrication intervals shown are based on a good quality lithium based grease at a maximum temperature of 160°F, and a c /p=15. Reduce the interval by half for each 27°F above 160°F, or for vertical applications. (High temperature greases, can operate for longer periods of time than those listed above.) Lubricate more often in applications where there is a risk of heavy solid and chemical contamination. Consult manufacturer or SKF application engineering for details.

21

SKF vibration data @ 1 rpm inner ring rotation Deep groove ball bearings 6200 series

inner ring defect freq.(Hz) outer ring defect freq.(Hz) cage train freq.(Hz) ball defect freq.(Hz)

Bearing

6200 6201 6202 6203 6204 6205 6206 6207 6208 6209 6210 6211 6212 6213 6214 6215 6216 6216* 6217 6217* 6218 6219 6220 6221 6222 6224 6226 6228 6230 6232

0.083 0.074 0.083 0.082 0.082 0.090 0.091 0.091 0.090 0.099 0.098 0.099 0.099 0.107 0.107 0.107 0.116 0.098 0.107 0.098 0.107 0.098 0.098 0.099 0.099 0.089 0.088 0.097 0.106 0.114

0.051 0.042 0.051 0.051 0.051 0.060 0.059 0.059 0.060 0.068 0.068 0.068 0.068 0.076 0.076 0.076 0.084 0.069 0.076 0.069 0.076 0.068 0.068 0.068 0.068 0.061 0.062 0.070 0.078 0.086

0.006 0.006 0.006 0.006 0.006 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007

0.066 0.057 0.066 0.066 0.066 0.079 0.077 0.077 0.078 0.085 0.089 0.087 0.086 0.095 0.095 0.095 0.104 0.093 0.096 0.092 0.095 0.090 0.089 0.088 0.087 0.090 0.092 0.100 0.108 0.116

*Old design, no longer produced

22

SKF vibration data @ 1 rpm inner ring rotation Deep groove ball bearings 6300 series

inner ring defect freq.(Hz) outer ring defect freq.(Hz) cage train freq.(Hz) ball defect freq.(Hz)

Bearing

6300 6301 6302 6303 6304 6305 6306 6307 6308 6309 6310 6311 6312 6313 6314 6314* 6315 6316 6317 6318 6319 6320 6321 6322 6324 6326 6328 6330

0.066 0.066 0.074 0.074 0.074 0.074 0.082 0.082 0.082 0.083 0.083 0.082 0.082 0.082 0.082 0.082 0.082 0.082 0.082 0.082 0.082 0.082 0.082 0.082 0.081 0.081 0.081 0.090

0.034 0.034 0.042 0.042 0.043 0.043 0.051 0.051 0.051 0.051 0.051 0.051 0.051 0.051 0.051 0.051 0.051 0.051 0.051 0.052 0.052 0.051 0.051 0.051 0.052 0.052 0.052 0.060

0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.006 0.007 0.007 0.007 0.007

0.046 0.046 0.056 0.057 0.059 0.059 0.067 0.067 0.068 0.065 0.066 0.067 0.067 0.067 0.068 0.068 0.069 0.069 0.069 0.070 0.070 0.068 0.068 0.067 0.073 0.073 0.073 0.079

*Old design, no longer produced

23

SKF vibration data @ 1 rpm inner ring rotation Cylindrical roller bearings N, NJ, NU 200 EC series

inner ring defect freq.(Hz) outer ring defect freq.(Hz) cage train freq.(Hz) roller defect freq.(Hz)

Bearing

202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 224 226 228 230 232

0.112 0.112 0.112 0.129 0.129 0.138 0.138 0.146 0.154 0.163 0.155 0.155 0.163 0.172 0.172 0.163 0.163 0.164 0.164 0.155 0.163 0.163 0.164 0.181 0.181 0.181

0.071 0.071 0.071 0.088 0.087 0.095 0.095 0.104 0.113 0.120 0.112 0.112 0.120 0.128 0.128 0.120 0.120 0.119 0.120 0.112 0.120 0.120 0.120 0.136 0.136 0.136

0.006 0.006 0.006 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007

0.071 0.070 0.072 0.083 0.083 0.087 0.089 0.096 0.104 0.106 0.100 0.101 0.107 0.113 0.114 0.107 0.108 0.103 0.104 0.101 0.106 0.106 0.105 0.115 0.115 0.116

24

SKF vibration data @ 1 rpm inner ring rotation Cylindrical roller bearings N, NJ, NU 300 EC series

inner ring defect freq.(Hz) outer ring defect freq.(Hz) cage train freq.(Hz) roller defect freq.(Hz)

Bearing

303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 324 326 328 330 332

0.104 0.104 0.112 0.121 0.121 0.121 0.130 0.130 0.130 0.130 0.130 0.130 0.130 0.130 0.139 0.130 0.139 0.130 0.130 0.139 0.130 0.139 0.139 0.139 0.139

0.063 0.063 0.071 0.079 0.079 0.079 0.086 0.087 0.086 0.087 0.096 0.087 0.086 0.087 0.094 0.087 0.095 0.087 0.096 0.094 0.087 0.094 0.095 0.095 0.094

0.006 0.006 0.006 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007 0.007

0.063 0.063 0.070 0.074 0.077 0.075 0.078 0.081 0.079 0.081 0.079 0.081 0.079 0.081 0.083 0.081 0.086 0.080 0.078 0.084 0.081 0.083 0.085 0.085 0.084

25

ABMAdSKF Product number comparison

90 BC 03 J PP N 3 0 X 6 3 18 2Z N C3 GJN 1 2 3 4 5 6 7 8 9 10 2 3 1 5 6 4 8 7 10 9

symbols ABMA 1. Bore diameter 90 XX18 ABMA/5 = SKF exc. 17 = XX03 15 = XX02 12 = XX01 10 = XX00 Conrad maximum capacity angular contact (15°) angular contact (12°) angular contact (25°) angular contact (40°) extra light light medium heavy any type pressed steel pressed brass machined brass SKF description

2.

Bearing type BC BL BN BA BT 6XXX XXX 7XXX CD 7XXX CC 7XXX ACD 7XXX B X0XX X2XX X3XX X4XX J Y M Z RS,RS1,RSH DB DF DT

3.

Dimension series 00 02 03 04

4.

Cage type X J Y, K M

5.

Seals/shields or duplex mounting X P E RR UU TT

character separator (PP ' 2Z, two shields) (EE ' 2RS, two seals) duplex back-to-back duplex face-to-face duplex tandem

26

ABMAdSKF Product number comparison

90 BC 03 J PP N 3 0 X 6 3 18 2Z N C3 GJN 1 2 3 4 5 6 7 8 9 10 2 3 1 5 6 4 8 7 10 9

symbols ABMA 6. N A G C 7. SKF N NB NR NBR description groove without ring groove without ring on same side as seal/shield groove with ring groove with ring on same side as seal/shield normal clearance tighter than C2 tighter than normal looser than normal looser than C3 looser than C4 light preload medium preload heavy preload normal, ABEC1, ISO P7 ABEC 3, ISO P6 ABEC 5, ISO P5 ABEC 7, ISO P4 ABEC 9 any slush or grease refer to manufacturer (consult SKF Engineering) heat stabilized to 150° C heat stabilized to 200° C Snap ring and groove

Radial clearance/preload 0 1 2 3 4 5 7 8 9 C1 C2 C3 C4 C5 GA GB GC P6 P5 P4 P9A -

8.

Tolerance class 0 6 5 4 2

9

Lubricant X A

10. Special features X26 X27 X28 S0 S1

27

Comparative Viscosity Classifications

Kinematic viscosities mm2/s at 40°C mm2/s at 100°C ISO VG AGMA grades SAE grades crankcase oils SAE grades gear oils Saybolt viscosities SUS/100°F SUS/210°F

2000

70 1500 60 250W 1000 680 8 140W 30 460 320 20 220 150 7 6 50W 5 40W 4 85W 100 10 9 8 7 6 32 5 4 22 5W 15 10W 75W 68 46 3 2 20W 1 30W 80W 90W 8A

10000 8000 6000 5000 4000 3000 2000 1500 100 1000 800 600 500 400 55 300 200 45 150 40 50 90 80 70 60 200 300

1000 800

50 40

600 500 400 300 200

100 80 60 50 40 30 20

100 80 70

10 8 6 5 4 3

10 7

60 50

5 3

40

35 2 2 32 Viscosities based on 95 VI single-grade oils. ISO grades are specified at 40° C. AGMA grades are specified at 100°F. SAE 75W, 80W, 85W, and 5 and 10W specified at low temperature (below -17°F = 0°C). Equivalent viscosities for 100°F and 210°F are shown. SAE 90 to 250 and 20 to 50 specified at 210°F (100°C). Comparison of various viscosity classification methods

NOTE: ISO mineral lubricants are recommended over SAE and AGMA lubricants for centrifugal pump applications.

28

29

® SKF and INSOCOAT are registered trademarks of SKF USA Inc. The contents of this publication are the copyright of the publisher and may not be reproduced (even extracts) unless prior written permission is granted. Every care has been taken to ensure the accuracy of the information contained in this publication but no liability can be accepted for any loss or damage whether direct, indirect or consequential arising out of use of the information contained herein. © 2000 SKF USA Inc. (??M/AN 12/2008) Printed in U.S.A. Publication 140-430 Version 12/2008

Information

140-430 Bearg 2008.qxp

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