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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
Availability:
4 in stock
Super-precision angular contact ball bearing, 40 x 68 x 15 mm, 25° contact angle, open. ABEC 7, universal medium preload, 7008 envelope.
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$83.77
4 in stock
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| MFR / Brand | SNFA |
|---|---|
| Model | 2MM-9108 / 7008 U-M / EX 40-7 CE 3 UM |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 40 mm |
| OD | 68 mm (2.6772 in) |
| Base Number | EX40 |
|---|---|
| Industry Terms | Spindle bearing, super precision angular contact bearing, machine tool bearing, 25 degree angular contact, SNFA EX series, universally matchable bearing |
| Common Misspellings | EX40 7CE3UM, EX40-7CE3-UM, EX 40 7CE3UM, SNFA EX40-7-CE3-UM |
| Application Types | Grinding and milling spindles, high-speed motor spindles, precision gearboxes, indexing and rotary tables |
| Overall Width | 15 mm (0.5906 in) |
| Bore Shaft Size | 40 mm (1.5748 in) |
| Mpn Variants | EX40-7CE3UM, EX 40-7 CE 3 UM, EX40 7CE3 UM, EX40-7-CE-3-UM, EX407CE3UM, 7008 U-M, 7008UM, 2MM-9108, 2MM9108 |
| Compatible With Replaces | ISO 7008 super-precision spindle positions, 40 mm shaft |
| Series | EX (SNFA single row super precision), ISO 7008 envelope |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Part Number | EX40-7CE3UM |
| Cross Reference 1 | Fafnir 3MM9108WI – 25° |
|---|---|
| Cross Reference 2 | SKF 7008 ACD/P4A – 25°; check preload |
| Cross Reference 3 | FAG B7008-E-T-P4S – 25°; check preload |
| Cross Reference 4 | SNFA EX40-7CE1 – 15° vs 25° |
| Cross Reference 5 | Fafnir 2MM9108WI – 15° vs 25° |
What this part is: SNFA EX40-7CE3UM single-row super-precision angular contact ball bearing. Bore: 40 mm. Outside diameter: 68 mm. Width: 15 mm. Series: EX, the SNFA single-row super-precision spindle range, on the ISO 7008 envelope. Bore form: straight. Closure: open on both faces. Number Of Rows: 1. Decoding the designation: EX: SNFA single-row super-precision angular contact series. 40: bore in millimetres. 7: Precision Class ABEC 7. CE3: Contact Angle 25°. UM: universal, medium preload — the rings are flush-ground so pieces stack back-to-back, face-to-face or in tandem and reach medium preload without shims. The carton also carries the plain forms 7008 U-M and 2MM-9108, both held as searchable part-number variants. What these specs mean in practice: A 25° contact angle carries substantially more thrust and gives higher axial stiffness than a 15° bearing on the same envelope, at some cost in speed. Medium preload sits between light and heavy: more spindle rigidity than light preload, less frictional heat than heavy. ABEC 7 running accuracy holds bore and raceway runout tight enough for a grinding or milling spindle. Quantity and configuration: Unit Quantity: 1 Pc. One universally ground bearing, supplied open. Fitting notes: Straight bore, mounted directly on the shaft seat. Faces are flush-ground for stacking against further UM pieces of the same designation. Internal Clearance: N/A on a preloaded execution. Interchange guidance: Other 25° super-precision numbers in 40 x 68 x 15 mm: Fafnir 3MM9108WI, SKF 7008 ACD/P4A and FAG B7008-E-T-P4S; check the preload class on each. SNFA EX40-7CE1 and Fafnir 2MM9108WI are the same size at 15° and are related parts.
$760.47
16 in stock
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
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