store Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
Availability:
2 in stock
Super precision spindle angular contact ball bearing, 50 x 90 x 20 mm, 25° contact angle, phenolic cage, medium preload, matched duplex pair.
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$233.79
2 in stock
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM210WICRDUM |
| Model | 3MM210WI-CR-DUM 7210E-T-P4S-DUM |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 50 mm |
| OD | 90 mm |
| Width | 20 mm |
| Material | Bearing Steel |
|---|---|
| Series | 3MM200 |
| Lubricant | grease or oil |
| Preload | Medium |
| Base Number | 3MM210WI |
| Total Width | 40 mm |
| Overall Width | 20 mm |
| Mpn Variants | 3MM210WICRDUM / 3MM-210-WI-CR-DUM / 3 MM 210 WI CR DUM / 7210E-T-P4S-DUM |
| Arrangement Configuration | Duplex pair (DUM), universally ground |
| Precision Class | ABEC 7/9 / P4S |
| Dynamic Load Rating C1 | 45,200 N |
| Cage Type | Machined, outer-ring land riding |
| Dynamic Load Rating | 45,200 N |
| Static Load Rating | 30,200 N |
| Precision Rating | ABEC 7/9 / P4S |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Limiting Speed | 15,800 rpm grease; 28,800 rpm oil |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Internal Clearance | N/A |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 25° |
| Design Units | Metric |
| Bearing Material | Bearing Steel |
| Cross Reference 1 | SKF 7210 ACD/P4ADGB – preload class may differ |
|---|---|
| Cross Reference 2 | FAG B7210-E-T-P4S-DUM |
| Cross Reference 3 | NSK 7210A5TRDUMP4 |
| Cross Reference 4 | NTN 7210UADB/GNP4 – DB matched pair, not universal |
| Cross Reference 5 | RHP 7210A5TDUMP4 |
| Cross Reference 6 | IBC 7210-E-TPA-P4-DUM |
Fafnir 3MM210WI-CR-DUM super precision spindle angular contact ball bearing, supplied as a factory-matched duplex pair. Bore Diameter: 50 mm. Outside Diameter: 90 mm. Overall Width: 20 mm. Total Width: 40 mm across the mounted pair. Contact Angle: 25°. Precision Class: ABEC 7/9 / P4S. Cage Material: Phenolic. Cage Type: Machined, outer-ring land riding. Rolling Elements: Ball. Bearing Material: Bearing Steel. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1. Design Units: Metric. Series: 3MM200. Base Number: 3MM210WI.
3MM — 25° contact angle, Fafnir super precision range.
210 — 200WI series, ISO 72-series envelope, 50 mm bore, giving the 7210 boundary dimensions.
WI — low shoulder on both rings.
CR — phenolic outer-ring land riding cage.
DU — duplex set, universally ground for flush faces.
M — medium preload.
Dynamic Load Rating: 45,200 N per bearing. Static Load Rating: 30,200 N. Timken also publishes an ISO 281 dynamic radial rating of 41,100 N per row for the same bearing. A 25° contact angle carries substantially more thrust per row than a 15° execution on the same envelope, and trades top speed for that capacity.
Limiting Speed: 15,800 rpm grease; 28,800 rpm oil. Lubricant: grease or oil. The phenolic cage rides on the outer ring land, which keeps the cage located at speed and damps cage chatter.
Preload: Medium. A medium preload sits between the light and heavy grades for stiffness and running temperature, and is the common choice for general spindle duty. Internal Clearance: N/A — the set runs under preload.
Shaft Backing Shoulder Diameter: 57.4 mm (2.260 in). Housing Backing Shoulder Diameter: 83.3 mm (3.280 in). Maximum housing fillet radius the bearing corners clear: 1 mm (0.039 in). Outer ring to-clear radius: 1 mm (0.039 in).
Unit Quantity: 2 Pcs. Arrangement: duplex pair, universally ground, medium preload. Mounted stack height 40 mm.
Super precision executions on the same 50 x 90 x 20 mm envelope at 25° with a medium duplex preload: SKF 7210 ACD/P4ADGB, FAG B7210-E-T-P4S-DUM, NSK 7210A5TRDUMP4, NTN 7210UADB/GNP4, RHP 7210A5TDUMP4 and IBC 7210-E-TPA-P4-DUM. Searchable forms of the Fafnir number: 3MM210WICRDUM, 3MM-210-WI-CR-DUM, 3 MM 210 WI CR DUM. Timken world part number: 7210E-T-P4S-DUM.
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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