store 
Timing Belt Pulleys and V-Belt Sheaves: Matching Belt Drive Components Correctly
Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
Availability:
2 in stock
Super-precision angular contact ball bearing, 50 x 72 x 12 mm, 15° contact angle, medium preload, phenolic outer-land-riding cage, ABEC 7/9.
List Price
$256.67
2 in stock
On the Shelf & Ready to Ship
On all orders
No Risk, No Hassle
| MFR / Brand | Fafnir |
|---|---|
| MPN | 2MM9310WI DUM |
| Model | 2MM 9310 WI CR DUM / 71910 C T DUM P4 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 50 mm |
| OD | 72 mm |
| Width | 12 mm |
| Material | Chrome steel |
|---|---|
| Series | 9300 |
| Lubricant | Grease or oil |
| Preload | Medium |
| Base Number | 2MM9310WI |
| Total Width | 24 mm |
| Bore Shaft Size | 50 mm |
| Mpn Variants | 2MM9310WI-DUM, 2MM9310WIDUM, 2MM9310WICRDUM, 2MM-9310-WI-CR-DUM, 2MM 9310 WI CR DUM |
| Arrangement Configuration | Universally ground duplex pair |
| Precision Class | ABEC 7/9 (ISO P4S) |
| Dynamic Load Rating C1 | 17,600 N per bearing |
| Additional Attributes | Ball type: steel. Shaft backing shoulder diameter: 54.6 mm. Housing backing shoulder diameter: 67.9 mm. Maximum shaft fillet radius: 0.6 mm. Outer ring to-clear radius: 0.6 mm. ISO dynamic radial rating per row: 16,000 N. |
| Closure Type | Open |
| Cage Type | CR – Phenolic Outer Land Riding Cage |
| Dynamic Load Rating | 17,600 N per bearing |
| Static Load Rating | 14,600 N per bearing |
| Precision Rating | ISO P4S (ABEC 7/9) |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Limiting Speed | 18,300 rpm grease / 36,600 rpm oil |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 15° |
| Mounting Arrangement | Universal duplex – back-to-back, face-to-face or tandem |
| Bearing Material | Chrome steel |
| Cross Reference 1 | Timken 71910C-T-P4S-DUM |
|---|
Fafnir 2MM9310WI-DUM super-precision angular contact ball bearing, built by Timken. Universally ground duplex pair, medium preload, Unit Quantity: 2 Pcs. Bore 50 mm, outside diameter 72 mm, bearing width 12 mm, total width 24 mm, 15° contact angle.
2MM — Fafnir super-precision spindle execution at a 15° contact angle.
9310 — the 9300WI size series, ISO 71910 envelope, 50 x 72 x 12 mm.
WI — low shoulder on both rings.
CR — phenolic outer land riding cage.
DUM — universally ground duplex, medium preload. Two single-row bearings ground as a matched set.
Bore Diameter: 50 mm.
Outside Diameter: 72 mm.
Bearing Width: 12 mm.
Total Width: 24 mm.
Contact Angle: 15°.
Precision Class: ISO P4S (ABEC 7/9).
Preload: Medium.
Dynamic Load Rating (C1): 17,600 N per bearing.
Static Load Rating (C0): 14,600 N per bearing.
Limiting Speed: 18,300 rpm grease; 36,600 rpm oil.
Lubricant: grease or oil.
Cage Material: Phenolic, outer-ring land riding.
Rolling Elements: steel balls.
Closure Type: Open.
Shaft Backing Shoulder Diameter: 54.6 mm. Housing Backing Shoulder Diameter: 67.9 mm. Maximum Shaft Fillet Radius: 0.6 mm. Outer Ring To-Clear Radius: 0.6 mm. Mounting Arrangement: universal duplex, back-to-back, face-to-face or tandem.
Cross-references: Timken 71910C-T-P4S-DUM. Manufacturing part number: 2MM9310WI DUM. The same bearing is written 2MM9310WIDUM, 2MM-9310-WI-CR-DUM and 2MM9310WICRDUM.
Bore 50 mm, outside diameter 72 mm, width 12 mm per bearing, 24 mm total width for the pair.
Contact angle 15°; DUM is medium preload on a universally ground duplex pair.
Timken lists it as 71910C-T-P4S-DUM.
$73.22
35 in stock
$760.47
16 in stock
$43.50
29 in stock
$141.11
255 in stock
Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
Tapered, cylindrical, and spherical roller bearings all solve the same basic problem, carrying more load
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
Sort
Brand
Price
MPN
Categories
