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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:
2 in stock
Super-precision angular contact ball bearing, 25 x 62 x 17 mm, 25° contact angle, ABEC 7 / P4, phenolic cage, single universal bearing, medium preload.
List Price
$87.89
2 in stock
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| MFR / Brand | Fafnir |
|---|---|
| GTIN | 087796072251 |
| Model | 3MM 305 WI DUM / B 7305 E T DUM P4 / 7305A5 7305ACD |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 25 mm |
| OD | 62 mm |
| Width | 17 mm |
| Material | Chrome Steel |
|---|---|
| Preload | Medium |
| Base Number | 7305 |
| Industry Terms | spindle bearing, super precision bearing, precision angular contact, ABEC 7 bearing, machine tool bearing, universally ground bearing, matched set bearing, preloaded ball bearing |
| Common Misspellings | Faffnir, Fafner, Fafnier, 3MM305W1, 3MM305 WL, 3MM305WISUN, Timkin |
| Application Types | Machine tool spindles, grinding spindles, precision rotary and indexing tables, high accuracy gearboxes, test and metrology equipment |
| Bore Shaft Size | 25 mm (0.9843 in) |
| Mpn Variants | 3MM305WI-SUM, 3MM305WISUM, 3MM-305-WI-SUM, 3MM305WI CR SUM, 3MM-305-WI-CR-SUM, 3MM305WICRSUM, 3MM 305 WI CR SUM, 3MM305WI, 3MM305WIDUM, 3MM-305-WI-DUM |
| Manufacturer Status | Fafnir super precision now supplied under the Timken brand |
| Compatible With Replaces | Machine tool spindle positions specified for a 7305-envelope 25° super precision angular contact bearing at medium preload |
| Precision Class | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 25° |
| Part Number | 3MM305WI-SUM |
| Cross Reference 1 | FAG B7305-E-T-P4S - class P4S, preload by suffix |
|---|---|
| Cross Reference 2 | SKF 7305 ACD/P4A - class P4A, preload by suffix |
| Cross Reference 3 | NSK 7305A5 - 25 deg, class and preload by suffix |
| Cross Reference 4 | RHP 7305-E-T-SUM-P4 |
Fafnir (Timken) 3MM305WI SUM is a super-precision single-row angular contact ball bearing in the ISO 7305 envelope. Bore Diameter: 25 mm. Outside Diameter: 62 mm. Overall Width: 17 mm. Contact Angle: 25°. Precision Class: ABEC 7 / P4. Cage Material: Phenolic. Closure Type: Open. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Preload: Medium. Unit Quantity: 1 Pc.
3MM — Fafnir super-precision series with a 25° contact angle and P4 tolerance.
305 — ISO 7305 size, 25 x 62 x 17 mm.
WI — low shoulder on both rings, the super-precision spindle form.
CR — phenolic cage.
SUM — single universally ground bearing, medium preload.
Series: ISO 73xx. The 73xx section carries a thicker ring and a larger ball complement than the 72xx or 70xx series on the same 25 mm bore, which gives higher stiffness and load capacity on a small shaft.
Contact Angle: 25°. This angle takes more thrust and gives a stiffer axial response than a 15° bearing.
Preload: Medium. Medium preload gives more rigidity under cutting load than light preload, at the cost of more heat at speed.
Cage Material: Phenolic. A phenolic cage is light, which keeps centrifugal loading low at spindle speeds.
Unit Quantity: 1 Pc. Universal grinding lets two or more of these combine into a back-to-back (DB) set, a face-to-face (DF) set or a tandem (DT) set at the stated medium preload without shims or spacers.
Same 25 x 62 x 17 mm envelope and 25° contact angle: FAG B7305-E-T-P4S, SKF 7305 ACD/P4A, NSK 7305A5, RHP 7305-E-T-SUM-P4. 2MM305WI is the 15° version of this bearing. Searchable variants: 3MM305WI-SUM, 3MM305WISUM, 3MM-305-WI-SUM, 3MM305WI CR SUM, 3MM305WICRSUM, 3MM305WI, 3MM305WIDUM.
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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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