Inch Series Single Row Tapered Roller Bearings
PMK Inch Series Single Row Tapered Roller Bearings are interchangeable with globally recognized inch standards. Designed to handle combined loads efficiently, they provide smooth, precise operation in applications that demand reliability and service flexibility.
Key benefits
- Compatible with inch-based designs and international dimensions.
- Supports heavy radial and single-direction axial loads.
- High running accuracy with adjustable preload options.
- Simple, separable structure for easy installation.
- Manufactured to strict dimensional tolerances.
Applications
- Automotive, agricultural, and construction machinery.
- Industrial gearboxes and power drives.
- Rolling mills and mining equipment.
- Replacement use in imported inch-standard assemblies.
Specifications
| Boundary dimensions (mm) | Basic load ratings (kN) | Designations | e | Load factors | Mass kg | Limiting speeds (r/min) | |||||||||
|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|---|
| d | D | T | B | C | r1, 2min | r3, 4min | Cr | Cor | Y | Y0 | Grease | Oil | |||
| 152.400 | 222.250 | 46.830 | 46.83 | 34.925 | 3.5 | 1.5 | 330 | 630 | M231649/M231610 | 0.33 | 1.8 | 1 | 5.80 | 1500 | 2000 |
| 254.000 | 66.675 | 66.675 | 47.625 | 7.0 | 3.3 | 583 | 980 | 99600/99100 | 0.40 | 1.5 | 0.8 | 12.5 | 1300 | 1800 | |
| 155.575 | 336.550 | 85.725 | 79.45 | 54.03 | 6.4 | 6.4 | 825 | 1200 | BT1B328833 | 0.79 | 0.76 | 0.42 | 33.5 | 900 | 1300 |
| 158.750 | 205.583 | 23.812 | 23.812 | 18.258 | 4.8 | 1.5 | 138 | 280 | L432348/L432310 | 0.37 | 1.6 | 0.9 | 1.90 | 1500 | 2000 |
| 225.425 | 41.275 | 39.688 | 33.338 | 3.5 | 3.3 | 264 | 585 | 46780/46720 | 0.37 | 1.6 | 0.9 | 5.30 | 1400 | 1900 | |
| 160 | 252.412 | 63.500 | 69.93 | 52.46 | 1.5 | 3.3 | 512 | 900 | BT1B443924 | 0.26 | 2.3 | 1.3 | 11.7 | 1300 | 1800 |
| 165.100 | 225.425 | 41.275 | 39.688 | 33.338 | 3.5 | 3.3 | 264 | 585 | 46790/46720 | 0.37 | 1.6 | 0.9 | 4.75 | 1400 | 1900 |
| 336.500 | 92.075 | 92.25 | 69.85 | 3.3 | 6.4 | 1120 | 1700 | HH437549/HH437510 | 0.37 | 1.6 | 0.9 | 37.0 | 950 | 1400 | |
| 177.800 | 227.012 | 30.162 | 30.162 | 23.02 | 1.5 | 1.5 | 187 | 425 | 36990/36920 | 0.44 | 1.35 | - | 2.95 | 1300 | 1800 |
| 260.350 | 53.975 | 53.975 | 41.275 | 3.5 | 3.3 | 484 | 900 | M236849/M236810 | 0.33 | 1.8 | 1 | 9.35 | 1200 | 1700 | |
| 178.595 | 265.112 | 51.595 | 57.15 | 38.895 | 3.3 | 3.3 | 495 | 880 | M336948/M336912 | 0.33 | 1.8 | 1 | 9.60 | 1200 | 1700 |
| 179.934 | 265.112 | 51.595 | 57.15 | 38.895 | 3.3 | 3.3 | 495 | 880 | M336949/M336912 | 0.33 | 1.8 | 1 | 9.40 | 1200 | 1700 |
| 184.150 | 266.700 | 47.625 | 46.833 | 38.1 | 3.5 | 3.3 | 374 | 800 | 67883/67820 | 0.48 | 1.25 | 0.7 | 8.20 | 1100 | 1600 |
| 187.325 | 269.875 | 55.562 | 55.562 | 42.862 | 3.5 | 3.3 | 473 | 950 | M238849/M238810 | 0.33 | 1.8 | 1 | 9.85 | 1100 | 1600 |
| 282.575 | 50.800 | 47.625 | 36.512 | 3.5 | 3.3 | 402 | 695 | 87737/87111 | 0.43 | 1.4 | 0.8 | 9.80 | 1100 | 1600 | |
| 189.738 | 279.400 | 52.388 | 57.15 | 41.275 | 3.3 | 3.3 | 523 | 980 | M239447/M239410 | 0.33 | 1.8 | 1 | 11.0 | 1100 | 1600 |
| 190.475 | 279.400 | 52.388 | 57.15 | 41.275 | 3.3 | 3.3 | 523 | 980 | M239449/M239410 | 0.33 | 1.8 | 1 | 11.0 | 1100 | 1600 |
| 190.500 | 266.700 | 47.625 | 46.833 | 38.1 | 3.5 | 3.3 | 374 | 800 | 67885/67820 | 0.48 | 1.25 | 0.7 | 8.20 | 1100 | 1600 |
| 282.575 | 50.800 | 47.625 | 36.512 | 3.5 | 3.3 | 402 | 695 | 87750/87111 | 0.43 | 1.4 | 0.8 | 9.60 | 1100 | 1600 | |
| 191.237 | 279.400 | 53.975 | 58.738 | 41.275 | 3.3 | 3.3 | 523 | 980 | M239448A/M239410 | 0.33 | 1.8 | 1 | 10.5 | 1100 | 1600 |
| 196.850 | 257.175 | 39.688 | 39.688 | 30.162 | 3.3 | 3.3 | 275 | 655 | LM739749/LM739710 | 0.44 | 1.35 | 0.8 | 5.40 | 1100 | 1600 |
| 200.025 | 276.225 | 42.862 | 46.038 | 34.133 | 3.5 | 3.3 | 391 | 780 | LM241147/LM241110 | 0.31 | 1.9 | 1.1 | 7.70 | 1000 | 1500 |
| 203.200 | 261.142 | 28.575 | 27.783 | 21.433 | 1.5 | 1.5 | 216 | 440 | LL641149/LL641110 | 0.40 | 1.5 | 0.8 | 3.75 | 1100 | 1600 |
| 282.575 | 46.038 | 46.038 | 36.512 | 3.5 | 3.3 | 380 | 830 | 67983/67920 | 0.50 | 1.2 | 0.7 | 8.95 | 1000 | 1500 | |
| 203.987 | 276.225 | 42.662 | 46.038 | 34.133 | 3.3 | 3.3 | 391 | 780 | LM241148/LM241110 | 0.31 | 1.9 | 1.1 | 7.25 | 1000 | 1500 |
| 206.375 | 282.575 | 46.038 | 46.038 | 36.512 | 3.5 | 3.3 | 380 | 830 | 67985/67920 | 0.50 | 1.2 | 0.7 | 8.60 | 1000 | 1500 |
| 336.550 | 98.425 | 100.012 | 77.788 | 3.3 | 3.3 | 1140 | 2160 | H242649/H242610 | 0.33 | 1.8 | 1 | 34.0 | 900 | 1300 | |
| 212.725 | 285.750 | 46.038 | 46.038 | 34.925 | 3.5 | 3.3 | 352 | 780 | LM742745/LM742710 | 0.48 | 1.25 | 0.7 | 8.00 | 1000 | 1500 |
| 215.900 | 285.750 | 46.038 | 46.038 | 34.925 | 3.5 | 3.3 | 352 | 780 | LM742749/LM742710 | 0.48 | 1.25 | 0.7 | 7.90 | 1000 | 1500 |
| 216.408 | 285.750 | 46.038 | 49.212 | 34.925 | 3.5 | 3.3 | 352 | 780 | LM742747/LM742710 | 0.48 | 1.25 | 0.7 | 7.85 | 1000 | 1500 |
| 285.750 | 46.038 | 49.29 | 35 | 3.5 | 3.3 | 330 | 695 | BT1B443786AB | 0.48 | 1.25 | 0.7 | 7.85 | 1000 | 1500 | |
| 216.713 | 285.750 | 46.038 | 49.212 | 34.925 | 3.5 | 3.3 | 352 | 780 | LM742747A/LM742710 | 0.48 | 1.25 | 0.7 | 7.80 | 1000 | 1500 |
| 220.116 | 317.500 | 47.625 | 52.338 | 36.512 | 3.3 | 3.3 | 523 | 980 | LM245832/LM245810 | 0.31 | 1.9 | 1.1 | 12.5 | 900 | 1300 |
| 220.878 | 317.500 | 47.625 | 52.338 | 36.512 | 3.3 | 3.3 | 523 | 980 | LM245833/LM245810 | 0.31 | 1.9 | 1.1 | 12.5 | 900 | 1300 |
| 230.188 | 317.500 | 47.625 | 52.338 | 36.512 | 3.3 | 3.3 | 523 | 980 | LM245846/LM245810 | 0.31 | 1.9 | 1.1 | 11.0 | 900 | 1300 |
| 231.775 | 317.500 | 47.625 | 52.338 | 36.512 | 3.3 | 3.3 | 523 | 980 | LM245848/LM245810 | 0.31 | 1.9 | 1.1 | 10.5 | 900 | 1300 |
| 247.650 | 406.400 | 115.888 | 117.475 | 93.662 | 6.4 | 6.4 | 1610 | 3150 | HH249949/HH249910 | 0.33 | 1.8 | 1 | 60.0 | 800 | 1100 |
| 255.625 | 342.945 | 57.150 | 62.08 | 44.5 | 6.4 | 3.3 | 660 | 1400 | BT1B417708 | 0.35 | 1.7 | 0.9 | 14.0 | 850 | 1200 |
| 257.175 | 342.900 | 57.150 | 57.15 | 44.45 | 6.4 | 3.3 | 660 | 1400 | M349549/M349510 | 0.35 | 1.7 | 0.9 | 14.0 | 850 | 1200 |
| 263.525 | 325.438 | 28.575 | 28.575 | 25.4 | 1.5 | 1.5 | 220 | 550 | 38880/38820 | 0.37 | 1.6 | 0.9 | 53.0 | 900 | 1300 |
| 266.560 | 325.438 | 29.500 | 33.47 | 25.48 | 1 | 1.5 | 209 | 475 | BT1B446356A | 0.37 | 1.6 | 0.9 | 5.10 | 900 | 1300 |
| 266.700 | 325.438 | 27.755 | 31.88 | 25.48 | 1.5 | 1.5 | 209 | 475 | BT1B443884AE | 0.37 | 1.6 | 0.9 | 5.10 | 900 | 1300 |
| 355.600 | 57.150 | 57.15 | 44.45 | 3.5 | 3.3 | 644 | 1400 | LM451349/LM451310 | 0.35 | 1.7 | 0.9 | 15.5 | 850 | 1200 | |
| 292.100 | 374.650 | 47.625 | 47.625 | 34.925 | 3.3 | 3.3 | 501 | 1140 | L555249/L555210 | 0.40 | 1.5 | 0.8 | 12.0 | 800 | 1100 |
| 300 | 495.300 | 141.288 | 141.288 | 114.3 | 6.4 | 6.4 | 2330 | 4550 | HH258248/HH258210 | 0.33 | 1.8 | 1 | 107 | 630 | 850 |
| 304.800 | 546.100 | 171.053 | 171.13 | 140.17 | 8 | 8 | 3030 | 5600 | BT1B617089B | 0.35 | 1.7 | 0.9 | 170 | 600 | 800 |
| 330.2 | 415.925 | 47.625 | 47.625 | 34.925 | 3.5 | 3.5 | 402 | 965 | BT1B440009 | 0.50 | 1.2 | 0.7 | 14.3 | 700 | 950 |
| 482.600 | 85.725 | 80.167 | 60.325 | 6.4 | 3.3 | 1210 | 2500 | EE526130/526190 | 0.40 | 1.5 | 0.8 | 48.5 | 630 | 850 | |
| 333.375 | 469.900 | 90.488 | 90.488 | 71.438 | 6.4 | 3.3 | 1340 | 2850 | HM261049/HM261010 | 0.33 | 1.8 | 1 | 47.0 | 630 | 850 |
| 343.154 | 450.850 | 66.675 | 66.675 | 52.388 | 8.5 | 3.5 | 935 | 2200 | LM361649A/LM361610 | 0.35 | 1.7 | 0.9 | 28.0 | 670 | 900 |
| 346.075 | 488.950 | 95.250 | 95.25 | 74.612 | 6.4 | 3.3 | 1420 | 3150 | HM262749/HM262710 | 0.33 | 1.8 | 1 | 55.0 | 630 | 850 |
| 355.600 | 482.600 | 60.320 | 55.56 | 38.1 | 7 | 7 | 572 | 1200 | 431884A | 0.48 | 1.25 | 0.7 | 26.5 | 630 | 850 |
| 380.100 | 480 | 50 | 48.08 | 35.08 | 6 | 4 | 594 | 1500 | BT1B380-332420 | 0.50 | 1.2 | 0.7 | 20.5 | 600 | 800 |
| 384.175 | 546.100 | 104.775 | 104.775 | 82.55 | 6.4 | 6.4 | 1870 | 4150 | HM266449/HM266410 | 0.33 | 1.8 | 1 | 77.0 | 560 | 750 |
| 403.225 | 460.375 | 28.575 | 28.575 | 20.638 | 3.5 | 3.3 | 246 | 765 | LL566848/LL566810 | 0.40 | 1.5 | 0.8 | 6.70 | 600 | 800 |
| 406.400 | 508.000 | 61.912 | 61.912 | 47.625 | 3.3 | 3.3 | 825 | 2120 | L467549/L467510 | 0.37 | 1.6 | 0.9 | 26.5 | 560 | 750 |
| 574.675 | 76.200 | 67.866 | 50.8 | 6.8 | 3.3 | 935 | 2040 | EE285160/285226 | 0.50 | 1.2 | 0.7 | 53.5 | 530 | 700 | |
| 762.000 | 180.975 | 161.925 | 107.95 | 12.7 | 12.7 | 3690 | 6100 | H969249/H969210 | 0.94 | 0.64 | 0.35 | 320 | 380 | 500 | |
| 415.925 | 590.550 | 114.300 | 114.3 | 88.9 | 6.4 | 6.4 | 2120 | 4800 | M268749/M268710 | 0.33 | 1.8 | 1 | 120 | 500 | 670 |
| 430.212 | 603.250 | 76.200 | 73.025 | 50.8 | 6.4 | 6.4 | 1100 | 2320 | EE241693/242375 | 0.52 | 1.15 | 0.6 | 59.0 | 500 | 670 |
| 431.800 | 571.500 | 89.694 | 89.77 | 66.75 | 6.4 | 6.4 | 1450 | 3450 | BT1B328284/HA1 | 0.44 | 1.35 | 0.8 | 60.0 | 500 | 670 |
| 431.902 | 685.698 | 177.800 | 177.88 | 142.95 | 6.4 | 6.4 | 3910 | 8650 | BT1B332900 | 0.48 | 1.25 | 0.7 | 253 | 430 | 560 |
| 447.675 | 635.000 | 120.650 | 120.65 | 95.25 | 6.4 | 6.4 | 2380 | 5500 | M270749/M270710 | 0.33 | 1.8 | 1 | 120 | 450 | 600 |
| 457.200 | 573.088 | 74.612 | 74.612 | 57.15 | 6.4 | 6.4 | 1120 | 3000 | L570649/L570610 | 0.40 | 1.5 | 0.8 | 43.5 | 500 | 670 |
| 603.250 | 85.725 | 84.138 | 60.325 | 6.4 | 3.3 | 1450 | 3400 | LM770949/LM770910 | 0.46 | 1.3 | 0.7 | 61.5 | 480 | 630 | |
| 615.950 | 85.725 | 85.725 | 66.675 | 6.4 | 6.4 | 1470 | 3800 | LM272235/LM272210 | 0.33 | 1.8 | 1 | 72.0 | 450 | 600 | |
| 660.400 | 91.280 | 85.725 | 62.705 | 10.5 | 6.4 | 1790 | 3550 | EE737181/737260/VQ601 | 0.37 | 1.6 | 0.9 | 91.0 | 450 | 600 | |
| 479.425 | 679.450 | 128.588 | 128.66 | 101.68 | 6.4 | 6.4 | 2750 | 6300 | BT1B332529/HA1 | 0.33 | 1.8 | 1 | 145 | 430 | 560 |
| 482.600 | 634.873 | 80.962 | 80.962 | 63.5 | 6.4 | 3.3 | 1470 | 3650 | EE243190/243250 | 0.35 | 1.7 | 0.9 | 67.5 | 450 | 600 |
| 498.399 | 634.873 | 80.962 | 80.962 | 63.5 | 6.4 | 3.3 | 1470 | 3650 | EE243196AX/243250 | 0.35 | 1.7 | 0.9 | 60.0 | 450 | 600 |
| 498.475 | 634.873 | 80.962 | 80.962 | 63.5 | 6.4 | 3.3 | 1470 | 3650 | EE243196/243250 | 0.35 | 1.7 | 0.9 | 60.0 | 450 | 600 |
| 498.653 | 634.873 | 80.962 | 80.962 | 63.5 | 6.4 | 3.3 | 1470 | 3650 | EE243196AS/243250 | 0.35 | 1.7 | 0.9 | 59.5 | 450 | 600 |
| 520.700 | 736.600 | 88.900 | 81.758 | 53.975 | 6.4 | 3.3 | 1650 | 3350 | EE982051/982900 | 0.48 | 1.25 | 0.7 | 100 | 400 | 530 |
| 536.575 | 761.873 | 146.050 | 146.05 | 114.3 | 6.4 | 6.4 | 3360 | 8000 | M276449/M276410 | 0.33 | 1.8 | 1 | 208 | 380 | 500 |
| 539.750 | 635.000 | 50.800 | 50.8 | 38.1 | 6.4 | 6.4 | 781 | 2160 | LL575349/LL575310 | 0.40 | 1.5 | 0.8 | 27.0 | 430 | 560 |
| 549.275 | 692.150 | 80.963 | 80.963 | 61.913 | 6.4 | 6.4 | 825 | 2120 | L476549/L476510 | 0.37 | 1.6 | 0.9 | 67.0 | 560 | 750 |
| 558.800 | 736.600 | 88.108 | 88.108 | 63.5 | 6.4 | 6.4 | 1830 | 4150 | EE843220/843290 | 0.35 | 1.7 | 0.9 | 92.5 | 380 | 500 |
| 736.600 | 104.775 | 104.775 | 80.962 | 6.4 | 6.4 | 2330 | 5700 | LM377449/LM377410 | 0.35 | 1.7 | 0.9 | 115 | 380 | 500 | |
| 607.720 | 787.400 | 93.662 | 93.662 | 69.85 | 6.4 | 6.4 | 2160 | 5300 | EE649239/649310 | 0.37 | 1.6 | 0.9 | 110 | 340 | 450 |
| 609.600 | 787.400 | 93.662 | 93.662 | 69.85 | 6.4 | 6.4 | 2160 | 5300 | EE649240/649310 | 0.37 | 1.6 | 0.9 | 110 | 340 | 450 |
| 787.400 | 93.662 | 93.662 | 69.85 | 6.4 | 6.4 | 2160 | 5300 | EE649240AX/649310 | 0.37 | 1.6 | 0.9 | 110 | 340 | 450 | |
| 660.400 | 812.800 | 95.250 | 95.25 | 73.025 | 6.4 | 6.4 | 1940 | 5600 | L281147/L281110 | 0.33 | 1.8 | 1 | 105 | 320 | 430 |
| 939.800 | 136.525 | 127.08 | 98.5 | 6.4 | 6.4 | 3740 | 8150 | 332283 | 0.40 | 1.5 | 0.8 | 287 | 280 | 380 | |
| 1000 | 152.400 | 142.24 | 113.665 | 6.4 | 6.4 | 4400 | 9500 | BT1B334140/HA4 | 0.43 | 1.4 | 0.8 | 410 | 280 | 360 | |
| 679.450 | 901.700 | 142.875 | 142.875 | 111.125 | 9.7 | 6.4 | 3580 | 9000 | LM281849/LM281810 | 0.33 | 1.8 | 1 | 242 | 280 | 380 |
| 682.625 | 965.200 | 185.738 | 185.81 | 142.95 | 6.4 | 6.4 | 5120 | 12500 | 332283 | 0.33 | 1.8 | 1 | 420 | 260 | 360 |
| 685.800 | 876.300 | 93.662 | 92.075 | 69.85 | 6.4 | 6.4 | 2120 | 5500 | EE655270/655345 | 0.43 | 1.4 | 0.8 | 130 | 300 | 400 |
| 711.200 | 939.800 | 120.650 | 115.38 | 73.33 | 6.4 | 6.4 | 2640 | 6200 | BT1B328068/HA4 | 0.75 | 0.80 | 0.45 | 206 | 240 | 340 |
| 723.900 | 914.400 | 84.138 | 80.962 | 60.325 | 5.5 | 6.4 | 2050 | 4900 | EE755285/755360 | 0.37 | 1.6 | 0.9 | 115 | 280 | 380 |
| 736.600 | 825.500 | 31.750 | 31.75 | 25.4 | 3.5 | 3.3 | 429 | 1370 | LL582949/LL582910B | 0.40 | 1.5 | 0.8 | 22.5 | 300 | 400 |
| 759.925 | 889.000 | 69.850 | 69.85 | 50.8 | 3.3 | 3.3 | 1230 | 3800 | LL483448/LL483418 | 0.37 | 1.6 | 0.9 | 67.5 | 280 | 380 |
| 889.000 | 88.900 | 88.9 | 72 | 3.3 | 3.3 | 1940 | 6200 | L183448/L183410 | 0.30 | 2 | 1.1 | 94.0 | 260 | 360 | |
| 774.700 | 965.200 | 93.662 | 80.962 | 66.675 | 6.4 | 3.3 | 1940 | 4900 | EE752305/752380 | 0.40 | 1.5 | 0.8 | 131 | 240 | 340 |
| 801.688 | 914.400 | 58.738 | 58.738 | 41.275 | 3.5 | 3.3 | 1100 | 3550 | LL584449/LL584410 | 0.40 | 1.5 | 0.8 | 53.5 | 260 | 360 |
| 838.200 | 1041.400 | 93.662 | 88.9 | 66.675 | 6.4 | 6.4 | 1900 | 4800 | EE763330/763410 | 0.44 | 1.35 | 0.8 | 160 | 220 | 320 |
| 857.250 | 1092.200 | 120.650 | 111.125 | 76.2 | 19 | 6.4 | 2810 | 7350 | EE157337/157430 | 0.57 | 1.05 | 0.6 | 245 | 200 | 300 |
| 977.900 | 1130.300 | 66.675 | 63.5 | 47.625 | 6.4 | 6.4 | 1450 | 4400 | LL687949/LL687910 | 0.44 | 1.35 | 0.8 | 100 | 180 | 260 |
* All dimensions are in millimeters (mm) unless otherwise specified.
* Calculated constant (e) and load factors (Y, Y₀) are determined according to ISO 281 standards for bearing life calculation.
* Refer Disclaimer policy for more details.
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