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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:
2 in stock
Fafnir 2MM9304WICRDUL super-precision angular contact ball bearing duplex set, 20 x 37 x 9 mm, 15° contact angle, ABEC 7, light preload, phenolic cage.
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 2MM9304WI DUL |
| GTIN | 087796073401 |
| Model | 2MM 9304 WI CR DUL |
| Bearing Type | Angular Contact Ball Bearing |
| ID | 20 mm |
| OD | 37 mm |
| Width | 9 mm |
| Base Number | 9304 |
|---|---|
| Total Width | 18 mm |
| Bore Shaft Size | 20 mm |
| Mpn Variants | 2MM9304WI-DUL, 2MM-9304-WI-CR-DUL, 2MM 9304 WI CR DUL, 2MM9304WI DUL, 7904C |
| Manufacturer Status | Active |
| Arrangement Configuration | Duplex, universally ground (DUL) |
| Precision Class | ABEC 7 / P4 |
| Dynamic Load Rating C1 | 8,080 N per bearing |
| Additional Attributes | Shaft backing shoulder diameter 23.9 mm (0.940 in); housing backing shoulder diameter 33.7 mm (1.330 in); maximum shaft fillet radius 0.3 mm (0.012 in); outer ring to-clear radius 0.3 mm (0.012 in); ISO method dynamic rating per row 7340 N (1660 lbf) |
| Cage Type | CR – Phenolic Outer Land Riding Cage |
| Dynamic Load Rating | 8,080 N per bearing |
| Static Load Rating | 4,560 N per bearing |
| Precision Rating | ABEC 7 / P4 |
| Series | 9300WI |
| Cage Material | Phenolic |
| Number Of Rows | 1 per bearing |
| Limiting Speed | 42,100 rpm grease; 84,200 rpm oil |
| Contact Angle | 15° |
| Preload | Light |
| Design Units | Metric |
| Part Number | 2MM9304WICRDUL |
| Industry Terms | spindle bearing; super-precision angular contact; duplex pair; machine tool spindle bearing; 9300WI series |
| Common Misspellings | Fafnir 2MM9304; 2MM 9304WI; Fanir 2MM9304WI-DUL; 2MM9304W1CRDUL |
| Application Types | Machine tool spindles; grinding spindles; high-speed precision shafts |
| Cross Reference 1 | Timken 71904C-T-P4S-DUL |
|---|---|
| Cross Reference 2 | Fafnir 3MM9304WI - 25 deg vs 15 deg |
Fafnir 2MM9304WICRDUL is a matched duplex set of two super-precision spindle angular contact ball bearings from the Timken Fafnir 9300WI range, 20 x 37 x 9 mm per bearing, 15° contact angle, light preload. Condition: New. Sold as 2 pieces.
2MM — Fafnir super-precision spindle bearing, 15° contact angle; MM is the P4 precision class (ABEC 7).
9304 — 9300WI dimension series, bore code 04, the ISO 71904 envelope: 20 mm bore, 37 mm outside diameter, 9 mm width per bearing.
WI — low shoulder on both rings, the duplex form.
CR — phenolic outer land riding cage.
DUL — duplex, light preload. Two universally ground bearings supplied as a matched set with flush-ground faces.
Bore Diameter: 20 mm.
Outside Diameter: 37 mm.
Bearing Width: 9 mm per bearing.
Total Width: 18 mm across the set.
Contact Angle: 15°.
Precision Class: ABEC 7 / P4.
Preload: Light.
Dynamic Load Rating (C1): 8,080 N per bearing.
Dynamic Load Rating, ISO method (C1 per row): 7,340 N.
Static Load Rating (C0): 4,560 N per bearing.
Limiting Speed: 42,100 rpm grease; 84,200 rpm oil.
Cage Type: CR, phenolic outer land riding.
Cage Material: Phenolic.
Rolling Elements: Ball.
Number Of Rows: 1 per bearing.
Series: 9300WI.
Manufacturer Part Number: 2MM9304WI DUL.
World Part Number: 71904C-T-P4S-DUL.
Unit Quantity: 2 Pcs.
Shaft Backing Shoulder Diameter: 23.9 mm (0.940 in).
Housing Backing Shoulder Diameter: 33.7 mm (1.330 in).
Maximum Shaft Fillet Radius: 0.3 mm (0.012 in).
Outer Ring To-Clear Radius: 0.3 mm (0.012 in).
Arrangement / Configuration: duplex, universally ground (DUL), 18 mm total width.
Timken world part number: 71904C-T-P4S-DUL. Fafnir 3MM9304WI is the 25° build on the same 20 x 37 x 9 mm envelope.
Part number forms: 2MM9304WI-DUL, 2MM9304WICRDUL, 2MM-9304-WI-CR-DUL, 2MM 9304 WI CR DUL, 2MM9304WI DUL, 7904C.
Two universally ground bearings, a matched duplex set, 9 mm wide each and 18 mm total width.
Bore Diameter: 20 mm. Outside Diameter: 37 mm. Contact Angle: 15°.
CR is a phenolic outer land riding cage. DUL is a duplex set of universally ground bearings with light preload.
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Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
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Our team can locate, cross-reference, and source all parts.
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