303/28 Bearing Specification:
303/28 bearing is single row taper roller bearing.
For this bearing model,
d: 28mm
D: 68mm
T：19.75mm
B: 18mm
Weight: 0.345kg
Material: Chrome steel
Cage: Standard steel cage
Precision：Standard ABEC1/P0
Lubrication: Standard grease
Limiting Speed: 6100/8000 RPM
Drawing: Refer to KOYO 303/28R bearing
Also Known As: 303/28, 303 / 28, 303-28, 303 – 28, 303/28R, 303/28 R
taper roller bearing structure
Bearing Photo：
303-28 roller bearing
Tapered Roller Bearings Size Chart:
| Model Number | d | D | T |
| LM11749/LM11710 | 17.462 | 39.878 | 13.843 |
| LM11949/LM11910 | 19.05 | 45.237 | 15.494 |
| M12649/M12610 | 21.43 | 50.005 | 17.526 |
| LM12749/LM12710 | 21.986 | 45.237 | 15.494 |
| LM12749/LM12711 | 21.986 | 45.974 | 15.494 |
| L44643/L44610 | 25.4 | 50.292 | 14.224 |
| M84548/M84510 | 25.4 | 57.15 | 19.431 |
| M84249/M84210 | 25.4 | 59.53 | 23.368 |
| 15578/15523 | 25.4 | 60.325 | 19.842 |
| 15101/15243 | 25.4 | 61.912 | 19.05 |
| 15101/15245 | 25.4 | 62 | 19.05 |
| M86649/M86610 | 30.162 | 64.292 | 21.433 |
| LM67048/LM67010 | 31.75 | 59.131 | 15.875 |
| M88048/M88010 | 33.338 | 68.262 | 22.225 |
| LM48548/LM48510 | 34.925 | 65.088 | 18.034 |
| HM88649/HM88610 | 34.925 | 72.233 | 25.4 |
| LM300849/LM300811 | 40.988 | 67.975 | 17.5 |
| 18590/18520 | 41.275 | 73.025 | 16.667 |
| LM501349/LM501310 | 41.275 | 73.431 | 19.558 |
| L501349/LM501314 | 41.275 | 73.431 | 21.43 |
| M802048/M802011 | 41.275 | 82.55 | 26.543 |
| LM603049/LM603012 | 45.242 | 77.778 | 21.43 |
| JLM104948/JLM104910 | 50 | 82 | 21.5 |
| JM205149/JM205110 | 50 | 90 | 28 |
| JW5049/JW5010 | 50 | 105 | 32 |
| 18790/18720 | 50.8 | 85 | 17.462 |
| 529X/522 | 50.8 | 101.6 | 34.925 |
| JW5549/JW5510 | 55 | 115 | 34 |
| HM911244/JHM911210 | 59.987 | 130 | 34.1 |
| JW6049/JW6010 | 60 | 125 | 37 |
| 643/632 | 69.85 | 136.525 | 41.275 |
