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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.
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$256.67
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 2MM9310WICRDUM |
| Model | 2MM 9310 WI CR DUM / 71910 C T DUM P4 / 7910C |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 50 mm |
| OD | 72 mm |
| Width | 27 mm |
| Material | Bearing Steel |
|---|---|
| Series | 9300 |
| Condition | New |
| Lubricant | 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. |
| 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 | 71910C-T-P4S-DUM |
|---|
Fafnir 2MM9310WI-DUM super-precision angular contact ball bearing, built by Timken. Bore: 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. Cage Material: Phenolic. Cage Type: outer-ring land riding, machined. Rolling Elements: steel balls. Closure Type: Open. Series: 9300. Bore Type: Straight.
2MM — Fafnir super-precision spindle execution at a 15° contact angle, ground to ISO P4S.
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.
Dynamic Radial Load Rating (C1): 17,600 N per bearing. Static Radial Load Rating (C0): 14,600 N per bearing. ISO dynamic radial rating per row: 16,000 N. Limiting Speed: 18,300 rpm on grease, 36,600 rpm on oil. Lubricant: grease or oil.
The 719 dimension series is the extra-light section: a small radial cross-section for a given bore, which keeps mass and heat down and lets the bearing turn very fast. A 15° contact angle favours speed and radial stiffness over thrust capacity. Medium preload sits between the light grade, which runs fastest and coolest, and the heavy grade, which is stiffest. The phenolic cage is light, tolerates high surface speed and holds oil in its fabric base.
Unit Quantity: 2 Pcs. Universally ground duplex pair, mountable back-to-back, face-to-face or in tandem.
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.
Timken world part number: 71910C-T-P4S-DUM. Manufacturing part number: 2MM9310WI DUM. The same bearing is written 2MM9310WIDUM, 2MM-9310-WI-CR-DUM and 2MM9310WICRDUM.
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