303/28 Bearing 303-28 Tapered Roller Bearings 28*68*18
d: 28mm
D: 68mm
T：19.75mm
B: 18mm
Weight: 0.345kg
Material: Chrome steel
Cage: Standard steel cage
Precision：Standard ABEC1/P0
Also Known As: 303/28, 303 / 28, 303-28, 303 – 28, 303/28R, 303/28 R
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 |
Questions buyers ask when 303/28 and 303-28 is still under review
When is 303/28 and 303-28 worth comparing against nearby taper roller bearings options?
Comparison helps when dimensional fit is only part of the decision and load direction, sealing, clearance, speed, temperature, or repeat-order stability still need to be confirmed. Reviewing one or two nearby options early usually reduces sourcing mistakes later.
What details usually matter before approving 303/28 and 303-28 for repeat supply?
Buyers normally confirm the part reference, main dimensions, application, speed range, operating environment, sealing needs, and any packaging or marking requirements. That gives the supplier a cleaner basis for confirming availability and suitable alternatives.
Which next step usually helps after 303/28 and 303-28 is shortlisted?
A quick review of Taper Roller Bearings, one more commercial destination, and one practical guide usually saves time. That combination helps separate simple replacement orders from jobs that still need fit or application review.
Why keep a supporting guide linked beside 303/28 and 303-28?
Because it makes later decisions faster. When sizing notes, application cues, and nearby options stay close to the product, engineering, purchasing, and maintenance teams can revisit the same logic without starting the review from zero.
Shipping Method:
1. Sea shipping for mass cargos (GW > 500KGS)
2. Air shipping (GW between 100KGS – 500 KGS)
3. Express, such as DHL, TNT, Fedex, UPS for small cargos ( GW < 100KGS)
4. If you have shipping agent in China, we can send goods to your shipping agent's warehouse
Payment Terms:
We accept T/T, W/U, PAYPAL, L/C etc
Buyer FAQ
Questions buyers ask before choosing the next bearing option
What should I confirm before ordering 303/28 Bearing 303-28 Tapered Roller Bearings 28*68*18?
Confirm the bearing number, bore size, outside diameter, width, seal or shield type, cage material, clearance, precision level, quantity, and application. These details help prevent a size match from becoming a performance mismatch.
Can this bearing be matched for replacement or repeat supply?
Yes. Replacement and repeat orders are easier when the original marking, measured dimensions, photos, application, and quantity are available. If the marking is unclear, the team can start from the size and working condition.
Which product family does this bearing belong to?
This item is handled within the Taper Roller Bearings family. Comparing the family page can help buyers review similar sizes, seal options, load direction, and related bearing choices before requesting a quote.
What affects price and lead time for this bearing?
Price and lead time can change with quantity, stock availability, precision grade, clearance, material, cage, seal or shield type, lubrication, packaging, and whether the order needs standard matching or custom production.
How is this bearing checked before delivery?
Inspection can include material review, dimensional measurement, noise and vibration checks, surface and crack checks, visual review, and packaging inspection according to the confirmed order requirements.
Need help checking fit, price, or lead time? Request a bearing quote
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