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Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Availability:
1 in stock
Super-precision angular contact spindle bearing, 40 x 62 x 12 mm, 15° contact angle, ISO P4S, medium preload, phenolic cage, 22,400 rpm on grease.
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 2MM9308WI SUM |
| GTIN | 087796078048 |
| Model | 2MM9308WI-CR-SUM / 71908C-T-P4S-SUM |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 40 mm |
| OD | 62 mm |
| Width | 12 mm |
| Material | Bearing Steel |
|---|---|
| Series | 9300 |
| Preload | Medium |
| Base Number | 2MM9308WI |
| Total Width | 12 mm |
| Bore Shaft Size | 40 mm |
| Mpn Variants | 2MM9308WI-SUM; 2MM9308WICRSUM; 2MM 9308 WI CR SUM; 71908C-T-P4S-SUM |
| Arrangement Configuration | Single universally ground |
| Precision Class | ABEC 7/9 |
| Dynamic Load Rating C1 | 16000 N (3600 lbf) |
| Cage Type | CR – Phenolic Outer Land Riding Cage |
| Dynamic Load Rating | 16000 N (3600 lbf) |
| Static Load Rating | 11700 N (2640 lbf) |
| Precision Rating | ISO P4S (ABEC 7/9) |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Limiting Speed | 22400 |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50.68 |
| Contact Angle | 15° |
| Design Units | Metric |
| Bearing Class | P4S |
| Part Number | 2MM9308WICRSUM |
| Closure Type | Open |
| Cross Reference 1 | Timken 71908C-T-P4S-SUM (world part number) |
|---|---|
| Cross Reference 2 | NSK 7908CTYNSUMP4 - polyamide cage |
| Cross Reference 3 | SKF 71908 CDGB/P4A - different preload class |
| Cross Reference 4 | FAG B71908-C-T-P4S-UL - light preload |
Fafnir 2MM9308WI-SUM super-precision angular contact spindle ball bearing, built by The Timken Company. Single universally ground bearing. Unit Quantity: 1 Pc.
2MM — 15° contact angle, ISO P4S accuracy.
9308 — 9300WI series, ISO 71908 envelope.
WI — low shoulder on both rings.
CR — phenolic outer-land-riding cage.
SU — single universally ground bearing.
M — medium preload when mounted against a mate.
Timken world part number: 71908C-T-P4S-SUM.
Series: 9300WI. Bore Diameter: 40 mm. Outside Diameter: 62 mm. Overall Width: 12 mm. Total Width: 12 mm. Contact Angle: 15°. Precision Class: ISO P4S (ABEC 7/9). Preload: Medium. Cage Type: CR – Phenolic Outer Land Riding Cage. Cage Material: Phenolic. Rolling Elements: Steel balls. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1. Arrangement / Configuration: Single universally ground. Design Units: Metric. Dynamic Radial Load Rating (C1): 16,000 N (3,600 lbf). C1 ISO Dynamic Radial Rating per row: 14,500 N (3,270 lbf). Static Radial Load Rating (C0): 11,700 N (2,640 lbf). Limiting Speed: 22,400 rpm grease; 44,800 rpm oil. Unit Quantity: 1 Pc.
Max Shaft Fillet Radius: 0.6 mm (0.024 in). Outer Ring To Clear Radius: 0.6 mm (0.024 in). Shaft Backing Shoulder Diameter: 44.6 mm (1.760 in). Housing Backing Shoulder Diameter: 57.9 mm (2.280 in).
Cross-Reference 1: Timken 71908C-T-P4S-SUM, world part number. Cross-Reference 2: NSK 7908CTYNSUMP4, polyamide cage. Cross-Reference 3: SKF 71908 CDGB/P4A, different preload class. Cross-Reference 4: FAG B71908-C-T-P4S-UL, light preload. Searchable forms: 2MM9308WISUM, 2MM9308WI-SUM, 2MM 9308 WI CR SUM, 7908C.
Bore Diameter: 40 mm. Outside Diameter: 62 mm. Overall Width: 12 mm.
Dynamic Radial Load Rating (C1): 16,000 N. Static Radial Load Rating (C0): 11,700 N. Limiting Speed: 22,400 rpm grease; 44,800 rpm oil.
Contact Angle: 15°. Preload: Medium.
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