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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:
1 in stock
Super-precision angular contact ball bearing triple set, 20 x 42 x 12 mm each, 25° contact angle, light preload, phenolic cage, universally ground.
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$192.35
1 in stock
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM9104WITUL |
| GTIN | 087796333611 |
| Model | 3MM 9104 WI CR TUL / 7004 AC D P4A DGA / 7004 A5 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 20 mm |
| OD | 42 mm |
| Width | 12 mm |
| Material | Bearing Steel |
|---|---|
| Series | 9100WI |
| Preload | Light |
| Base Number | 9104 |
| Overall Width | 12 mm |
| Mpn Variants | 3MM9104WI-TUL; 3MM9104WICRTUL; 3MM-9104-WI-CR-TUL; 3MM 9104 WI CR TUL |
| Precision Class | ABEC 7/9 / P4S |
| Dynamic Load Rating | 11,100 N |
| Static Load Rating | 5,700 N |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Number Of Rows | 3 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Limiting Speed | 36,500 rpm grease; 66,800 rpm oil |
| Internal Clearance | N/A |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25° |
| Mounting Arrangement | Matched triple set |
| Bearing Material | Bearing Steel |
| Cross Reference 1 | 7004 A5 (20 x 42 x 12 mm, 25°) |
|---|---|
| Cross Reference 2 | SKF 7004 ACD/P4A |
| Cross Reference 3 | FAG B7004-E-T-P4S |
| Cross Reference 4 | NSK 7004A5TRSU P4 |
| Cross Reference 5 | SNFA EX20 7CE3 |
| Cross Reference 6 | Fafnir 2MM9104WI-CR-TUL (related, 15° contact angle on the same envelope) |
Fafnir 3MM9104WI-CR-TUL super-precision angular contact ball bearing, supplied as a matched triple set. Bore Diameter: 20 mm. Outside Diameter: 42 mm. Overall Width: 12 mm per bearing. Series: 9100WI. Base Number: 9104. Rolling Elements: Ball. Bore Type: Straight. Closure Type: Open. GTIN: 087796333611. The 9104 size code is the ISO 7004 envelope.
3MM — Contact Angle: 25°, in Timken’s MM super-precision spindle range.
MM — Precision Class: ABEC 7/9 (P4S).
9104 — the 20 mm bore size in the 9100 spindle series, on ISO 7004 boundary dimensions.
WI — low shoulder on both rings, the ring form that lets the ball complement be loaded at a steeper angle.
CR — Cage Material: Phenolic.
TU — Mounting Arrangement: triple, three bearings ground as one matched set.
L — Preload: Light.
Dynamic Load Rating: 11,100 N. Static Load Rating: 5,700 N. Contact Angle: 25°. A 25° angle carries more thrust and less speed than a 15°, which is the trade the triple stack is usually bought for.
Limiting Speed: 36,500 rpm grease; 66,800 rpm oil. Preload: Light. Precision Class: ABEC 7/9. Light preload holds the balls against their raceways with the smallest of the standard interference settings, giving axial stiffness with the least heat generation.
Shaft backing shoulder diameter 24.8 mm. Housing backing shoulder diameter 37.7 mm. Maximum housing fillet radius 0.6 mm. The straight bore seats on a ground spindle journal, and the universally ground faces set the preload when the clamp nut is tightened.
Unit Quantity: 3 Pcs. Number Of Rows: 3. Three bearings ship as one factory-matched TUL set.
The 20 x 42 x 12 mm envelope at 25° is the ISO 7004 A5 size, so a 25° super-precision 7004 triple set from another maker fits the same seat. The Fafnir 2MM9104WI-CR-TUL shares the envelope at 15° and is listed as a related angle rather than an interchange.
$141.11
255 in stock
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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If you have ever watched a machine glide smoothly back and forth, tracing a perfect
Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
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