Inner Diameter: 17mm
Outer Diameter: 47mm
Width: 14mm
Mass: 0.112kg
B: contact angle α 40 °
Operating Temperature: -30 °C to 120 °C
Cage Material: solid cage of glass‑fiber reinforced polyamide (PA66)
Equivalents: 7303, 7303 B, 7303-B-XL-JP, 7303BW, 7303B JP
7303B bearing is single row angular contact ball bearing.
Regarding this bearing’s designation,
Inner Diameter: 17mm
Outer Diameter: 47mm
Width: 14mm
Mass: 0.112kg
B: contact angle α 40 °
Tolerance Class: P6, ABEC3
Limiting Speed: 9500 rpm (oil lub.)
Limiting Speed: 7200 rpm (grease lub.)
Operating Temperature: -30 °C to 120 °C
Cage Material: solid cage of glass‑fiber reinforced polyamide (PA66)
Equivalents: 7303, 7303 B, 7303-B-XL-JP, 7303BW, 7303B JP
1. Single row angular contact design
The inner and outer raceways are offset, creating a defined contact angle that allows the 7303B bearing to simultaneously carry radial loads and significant axial load in one direction—ideal for applications with combined loading.
2. Defined contact angle (B-type)
The offset raceways generate a relatively large contact angle (B designation typically indicates 40 ° contact angle), which increases the 7303 B bearing’s capacity to sustain axial load in its designed direction and improves resistance to thrust-induced deflection.
3. High radial load capability
The robust ball set and solid ring construction allow the bearing to carry substantial radial forces, making it suitable for shafts subjected to both steady and varying radial loads.
4. Strong unidirectional axial load support
The contact angle focuses load transmission along a path that efficiently carries axial force in one direction; this makes the 7303-B-XL-TVP bearings well suited for arrangements where thrust is predictable and predominantly one-way.
| Model Number | Dimensions(mm) | Mass(KG) |
| 7300C | 10×35×11 | 0.066 |
| 7301C | 12×37×12 | 0.066 |
| 7302C | 15×42×13 | 0.081 |
| 7303C | 17×47×14 | 0.120 |
| 7304C | 20×52×15 | 0.146 |
| 7305B | 25×62×17 | 0.234 |
| 7305CQ1/S0 | 25×62×17 | 0.230 |
| 7305CJ | 25×62×17 | 0.230 |
| 7306C | 30×72×19 | 0.353 |
| 7306CTN1 | 30×72×19 | 0.340 |
| 7306CM | 30×72×19 | 0.424 |
| 7306AC | 30×72×19 | 0.350 |
| 7306CM | 30×72×19 | 0.429 |
| 7307C | 35×80×21 | 0.473 |
| 7308C | 40×90×23 | 0.662 |
| 7308CQ1/S0 | 40×90×23 | 0.662 |
| 7308CM | 40×90×23 | 0.693 |
| 7308C | 40×90×23 | 0.662 |
| 7309C | 45×100×25 | 0.888 |
| 7309CM | 45×100×25 | 0.812 |
| 7309CQ1 | 45×100×25 | 0.812 |
| 7309CQ1/YA | 45×100×25 | 1.030 |
| 7309C | 45×100×25 | 0.830 |
| 7310C | 50×110×27 | 1.080 |
| 7310CJ | 50×110×27 | 1.060 |
| 7310CM | 50×110×27 | 1.160 |
| 7311C | 55×120×29 | 1.370 |
| 7311CM | 55×120×29 | 1.650 |
| 7311CJ | 55×120×29 | 1.380 |
| 7311C | 55×120×29 | 1.440 |
| 7311CJE | 55×120×29 | 1.461 |
| 7312C | 60×130×31 | 1.710 |
| 7312CTN1 | 60×130×31 | 1.740 |
| 7312CJ | 60×130×31 | 1.710 |
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.
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.
A quick review of Angular Contact Ball 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.
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.
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
We accept T/T, W/U, PAYPAL, L/C etc
Buyer FAQ
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.
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.
This item is handled within the Angular Contact Ball Bearings family. Comparing the family page can help buyers review similar sizes, seal options, load direction, and related bearing choices before requesting a quote.
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.
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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