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 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 | 3MM210WI CR DUM; 3MM210WICR-DUM; 3MM-210-WI-CR-DUM; 3 MM 210 WI CR DUM; 3MM210WI 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 |
| Additional Attributes | Fafnir 3MM200WI series, ISO 7210 envelope, 25 degree contact angle, ball steel, universally ground duplex pair, medium preload, outer-land-riding phenolic cage. |
| 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 |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 25° |
| Design Units | Metric |
| Bearing Material | Bearing Steel |
| Industry Terms | super precision angular contact bearing; spindle bearing duplex pair; matched universal ground bearing set; ABEC 7 angular contact; 25 degree angular contact |
| Common Misspellings | Fafner 3MM210WICRDUM; Fanir 3MM210WICRDUM; Timkin 3MM210WI; 3MM 210 WI DUM |
| Application Types | Machine tool spindles; grinding spindles; precision rotary tables; high-speed precision shafts |
| Closure Type | Open |
| 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 3MM210WICRDUM super-precision spindle angular contact ball bearing, supplied as a factory-matched duplex pair. Unit Quantity: 2 Pcs. Arrangement: duplex pair, universally ground, medium preload.
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.
Bore Diameter: 50 mm. Outside Diameter: 90 mm. Overall Width: 20 mm. Total Width: 40 mm across the pair. Contact Angle: 25°. Precision Class: ABEC 7/9 / P4S. Dynamic Load Rating: 45,200 N per bearing. ISO 281 Dynamic Load Rating: 41,100 N per row. Static Load Rating: 30,200 N. Limiting Speed: 15,800 rpm grease; 28,800 rpm oil. Lubricant: grease or oil. Preload: Medium. Cage Material: Phenolic. Cage Type: Machined, outer-ring land riding. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open.
Shaft Backing Shoulder Diameter: 57.4 mm (2.260 in). Housing Backing Shoulder Diameter: 83.3 mm (3.280 in). Maximum housing fillet radius: 1 mm (0.039 in). Outer ring to-clear radius: 1 mm (0.039 in). Series: 3MM200. Base Number: 3MM210WI.
Same 50 x 90 x 20 mm envelope, 25°, medium duplex preload: FAG B7210-E-T-P4S-DUM; NSK 7210A5TRDUMP4; RHP 7210A5TDUMP4; IBC 7210-E-TPA-P4-DUM. SKF 7210 ACD/P4ADGB has a different preload class designation. NTN 7210UADB/GNP4 is a DB matched pair rather than a universal set. Timken world part number: 7210E-T-P4S-DUM. Also written 3MM210WI CR DUM, 3MM-210-WI-CR-DUM and 3 MM 210 WI CR DUM.
25°, carried by the 3MM prefix.
A factory-matched duplex pair of two bearings, universally ground, with medium preload.
Bore 50 mm, outside diameter 90 mm, width 20 mm per bearing. Dynamic Load Rating 45,200 N and Static Load Rating 30,200 N per bearing.
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