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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
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| MFR / Brand | SNFA |
|---|---|
| MPN | EX40-7CE3UM |
| 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) |
| Condition | New |
|---|---|
| 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 |
| Precision Class | ABEC 7 / P4 |
| Precision Rating | ABEC 7 / P4 |
| Series | EX (SNFA single row super precision), ISO 7008 envelope |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Internal Clearance | N/A (preloaded execution) |
| Contact Angle | 25° |
| Preload | Medium, universal (UM) |
| Mounting Arrangement | Universally flush-ground, single |
| Design Units | Metric |
| Part Number | EX40-7CE3UM |
| Cross Reference 1 | SKF 7008 ACD/P4A (25°, same envelope) |
|---|---|
| Cross Reference 2 | FAG B7008-E-T-P4S (25°, same envelope) |
| Cross Reference 3 | Fafnir 3MM9108WI (25°, same envelope) |
| Cross Reference 4 | Fafnir 2MM9108WI (related size, 15° contact angle) |
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.
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.
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.
Unit Quantity: 1 Pc. One universally ground bearing, supplied open.
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.
SKF 7008 ACD/P4A and FAG B7008-E-T-P4S are the 25° super-precision equivalents on the 40 x 68 x 15 mm envelope. Fafnir 3MM9108WI is the equivalent 25° execution in the Fafnir range. SNFA EX40-7CE1 and Fafnir 2MM9108WI share the envelope at 15° and are a related size.
$106.44
3 in stock
$106.44
3 in stock
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