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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:
16 in stock
Super-precision angular contact bearing set, 40x68x15 mm each, 25° contact angle, light preload, ABEC 7 / P4. Matched triplex set of 3, Fafnir 3MM9108WI TUL.
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$186.84
16 in stock
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM9108WI TUL |
| Model | 3MM 9108 WI TUL ABEC7 / B7008E TPA P4 TUL / 7008A5 7008ACD |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 40 mm (1.5748 in) |
| OD | 68 mm (2.6772 in) |
| Width | 15 mm (0.5906 in) per bearing |
| Preload | Light, universal (TUL) |
|---|---|
| Base Number | 3MM9108WI |
| Industry Terms | spindle bearing, precision angular contact bearing, triplex set, matched set bearing, ABEC 7 bearing, super precision ball bearing, 7008 bearing |
| Common Misspellings | 3MM9108 WI TUL, 3MM9108WLTUL, 3M M9108WITUL, 3MM908WITUL, Fafnir 3MM 9018 WI TUL |
| Application Types | Machine tool spindles, milling and grinding heads, precision ballscrew supports, indexing tables, high-speed motorised spindles |
| Total Width | 45 mm (1.7717 in) across the matched triplex set |
| Bore Shaft Size | 40 mm (1.5748 in) |
| Mpn Variants | 3MM9108WI-TUL, 3MM9108WITUL, 3MM 9108 WI TUL, 3MM9108WI TUL, 3MM9108WICRTUL |
| Arrangement Configuration | Matched triplex set (TUL), universal light preload |
| Precision Class | ABEC 7 / P4 |
| Number Of Rows | 1 per bearing, 3 in the set |
| Contact Angle | 25° |
| Design Units | Metric |
| Part Number | 3MM9108WI-TUL |
| Dynamic Load Rating C1 | 20,800 N (4,670 lbf) per bearing |
| Cage Type | Phenolic, outer-land-riding |
| Dynamic Load Rating | 20,800 N (4,670 lbf) per bearing |
| Static Load Rating | 14,200 N (3,190 lbf) per bearing |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Steel balls |
| Limiting Speed | 19,700 rpm grease / 35,800 rpm oil |
| Bore Type | Straight |
| Internal Clearance | Preloaded (universal light preload, triplex set) |
| Lubricant | Grease or oil |
| Mounting Arrangement | Matched triplex set (T) |
| Series | 3MM9100WI (ISO 7008 envelope) |
| Material | Chrome steel |
| Cross Reference 1 | FAG B7008-E-T-P4S-TUL |
|---|---|
| Cross Reference 2 | SKF 7008 ACD/P4ATBTA |
| Cross Reference 3 | RHP 7008ETTULP4 |
| Cross Reference 6 | 3MM9108WI-TUM (related size, medium preload) |
| Cross Reference 7 | 3MM9108WI-DUL (related size, duplex pair) |
Fafnir 3MM9108WI TUL is a matched triplex set of super-precision angular contact ball bearings: three bearings ground together as one unit and supplied together as the sale unit. Bore: 40 mm (1.5748 in). Outside Diameter: 68 mm (2.6772 in). Width: 15 mm (0.5906 in) per bearing. Total Width: 45 mm (1.7717 in) across the set. Contact Angle: 25°. Preload: Light, universal. Unit Quantity: 3 Pcs.
3MM — Fafnir super-precision series, 25° contact angle, ABEC 7 / ISO P4 precision class.
9108 — size code corresponding to the ISO 7008 envelope, 40 mm bore.
WI — ground-face style for matched mounting, with low shoulder on both rings.
T — triplex, three bearings ground as one set.
UL — universal light preload.
Contact Angle: 25°. Dynamic Load Rating C1: 20,800 N (4,670 lbf) per bearing. Static Load Rating C0: 14,200 N (3,190 lbf) per bearing. Limiting Speed: 19,700 rpm grease; 35,800 rpm oil. Precision Class: ABEC 7 / ISO P4. Preload: Light, universal (TUL). Cage Type: Phenolic, outer-land-riding. Rolling Elements: Steel balls. Bore Type: Straight. Closure Type: Open. Number Of Rows: 1 per bearing, 3 in the set. Lubricant: Grease or oil. Internal Clearance: preloaded, universal light preload ground into the ring faces across the set.
Bore: 40 mm (1.5748 in). Outside Diameter: 68 mm (2.6772 in). Width: 15 mm (0.5906 in) per bearing. Total Width: 45 mm (1.7717 in) across the matched triplex set. The C1 and C0 ratings are stated per bearing. Series: 3MM9100WI (ISO 7008 envelope).
Same 40 x 68 x 15 mm envelope, 25° angle and light preload: FAG B7008-E-T-P4S-TUL, SKF 7008 ACD/P4ATBTA and RHP 7008ETTULP4. Related sizes: Fafnir 3MM9108WI TUM (medium preload) and 3MM9108WI DUL (duplex pair). A 2MM9108WI set has a 15° contact angle. MPN Variants: 3MM9108WI-TUL, 3MM9108WITUL, 3MM 9108 WI TUL, 3MM9108WI TUL, 3MM9108WICRTUL.
The contact angle is 25° and the preload is light, universal (TUL).
Dynamic Load Rating C1 is 20,800 N (4,670 lbf) and Static Load Rating C0 is 14,200 N (3,190 lbf), both per bearing. Limiting Speed is 19,700 rpm on grease and 35,800 rpm on oil.
The sale unit is one matched triplex set of three bearings (Unit Quantity: 3 Pcs), 45 mm wide across the set.
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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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