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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:
4 in stock
Super-precision angular contact ball bearing duplex pair, 25 x 47 x 12 mm, 25 degree contact angle, P4 precision, phenolic cage, medium preload.
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$40.33
4 in stock
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM9105WI CR DUM |
| GTIN | 087796222410 |
| Model | 3MM 9105 WI CR DUM/ 7005 AC/A5 TR/TY P4/P4Y |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 25 mm |
| OD | 47 mm |
| Width | 12 mm |
| Series | 9100 |
|---|---|
| Preload | Medium |
| Base Number | 7005 |
| Industry Terms | spindle bearing; machine tool bearing; precision angular contact bearing; matched duplex pair; ground set; ABEC 7 bearing |
| Common Misspellings | Fafner; Fafnier; 3MM9105W1; 3MM9105 WI DUM |
| Application Types | Machine tool spindles; grinding heads; high-speed rotary tables; precision gearboxes |
| Bore Shaft Size | 25 mm |
| Mpn Variants | 3MM9105WI-DUM; 3MM9105WICRDUM; 3MM-9105-WI-CR-DUM; 3MM9105WI DUM; 3MM9105WIDUM; 3MM9105WI CR DUM |
| Manufacturer Status | Fafnir brand consolidated into Timken; designation unchanged |
| Precision Class | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25° |
| Part Number | 3MM9105WI-DUM |
| Cross Reference 1 | SKF 7005 ACD/P4ADGB - 25 deg, medium preload |
|---|---|
| Cross Reference 2 | FAG B7005-E-T-P4S-UM - 25 deg, P4S class |
| Cross Reference 3 | NSK 7005A5TYNDUMP4 - 25 deg, polyamide cage |
| Cross Reference 4 | RHP 7005ETDUMP4 - 25 deg, phenolic cage |
Fafnir (Timken) 3MM9105WI-CR-DUM super-precision angular contact ball bearings, supplied as a factory matched universally ground duplex pair. Bearing Type: Angular contact ball bearing. Series: 9100 WI, the 7005 envelope. Base Number: 7005. Number Of Rows: 1 per bearing. Closure Type: Open. Unit Quantity: 2 Pcs, one universally ground duplex pair supplied as a matched set.
3MM — 25° contact angle; MM is precision class P4, equivalent to ABEC 7.
9105 — 9100 WI series, the ISO 7005 size at 25 x 47 x 12 mm.
WI — low shoulder on both rings, the duplex form.
CR — phenolic cage.
DU — duplex, universally ground.
M — medium preload; DUL is the light-preload build and DUH the heavy-preload build.
Bore Diameter: 25 mm. Outside Diameter: 47 mm. Overall Width: 12 mm per bearing. Total Width: 24 mm as a mounted duplex pair. Contact Angle: 25°. Precision Class: ABEC 7 / P4. Cage Material: Phenolic. Preload: Medium. Bore Type: Straight. Rolling Elements: Steel balls.
Universal grinding means the pair reaches its marked medium preload when the two bearings are clamped together, in back-to-back, face-to-face or tandem orientation.
Cross-references, 25° medium-preload executions of this envelope: SKF 7005 ACD/P4ADGB, FAG B7005-E-T-P4S-UM (P4S class), NSK 7005A5TYNDUMP4 (polyamide cage) and RHP 7005ETDUMP4 (phenolic cage). The 15° build of the same 25 x 47 x 12 mm envelope is 2MM9105WI. Carton designations: 3MM9105WI-DUM, 3MM9105WICRDUM, 3MM-9105-WI-CR-DUM, 3MM9105WI CR DUM. Fafnir super-precision trades under the Timken name today and the designation is unchanged.
Each bearing is 25 mm bore, 47 mm outside diameter and 12 mm wide, the ISO 7005 size. The duplex pair is 24 mm wide.
The 3MM prefix gives a 25° contact angle with P4 precision (ABEC 7).
DU is a universally ground duplex pair and M is medium preload. CR is a phenolic cage.
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Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
Tapered, cylindrical, and spherical roller bearings all solve the same basic problem, carrying more load
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
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