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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
Availability:
1 in stock
Super-precision angular contact ball bearing, 40 x 90 x 23 mm, straight bore, open, ABEC 7/9 (P4S), CR phenolic outer-land-riding cage, 300WI series.
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$115.97
1 in stock
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| MFR / Brand | Fafnir |
|---|---|
| Model | MM 308 WI CR / 7308 B T P4 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 40 mm |
| OD | 90 mm |
| Width | 23 mm |
| Base Number | MM308WI |
|---|---|
| Industry Terms | Spindle bearing, machine tool bearing, super precision angular contact, 7308, 300WI series, phenolic cage |
| Common Misspellings | Fafner, Faffnir, MM308W1, MM 308 WL, 7308 vs 7208 |
| Bore Shaft Size | 40 mm |
| Mpn Variants | MM308WICR, MM308WI, MM-308-WI-CR, MM 308 WI CR, 308WI, 7308-B, 7308 B T P4 |
| Series | 300WI (ISO 73) |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Part Number | MM308WICR |
Fafnir MM308WICR super-precision angular contact ball bearing, 300WI series. Brand: Fafnir (Timken). Part Number: MM308WICR. Bore: 40 mm. Outside Diameter: 90 mm. Overall Width: 23 mm. Design Units: Metric. Number Of Rows: 1. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. Bearing Material: Chrome bearing steel.
Precision Class: P4S. Precision Rating: ABEC 7/9. The MM prefix is Fafnir’s super-precision spindle range and carries the P4S tolerance class. WI marks a low shoulder on both rings. CR is the phenolic outer-land-riding cage. Cage Material: Phenolic. Cage Type: CR – phenolic outer land riding. Series: 300WI, carrying the ISO 7308 envelope of 40 x 90 x 23 mm.
P4S is the tightest tolerance class Fafnir applies to a spindle bearing, holding bore, outside diameter and running accuracy close enough for a machine tool spindle where shaft runout sets the finish on the workpiece. The 300 series is the heavy section: a 40 mm shaft inside a 90 mm housing bore carries more load than a 70- or 72-series bearing on the same shaft. The phenolic cage rides on the outer ring land, staying centred at speed and holding lubricant against the ball pockets.
Unit Quantity: 1 Pc.
Cross-Reference: Timken 7308, on the 40 x 90 x 23 mm envelope.
MPN Variants: MM308WICR, MM308WI, MM-308-WI-CR, MM 308 WI CR, 308WI, 7308-B, 7308 B T P4.
Rockwell’s own product page for the Kinetix 6000 is down
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
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