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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:
12 in stock
Super-precision angular contact ball bearing, 35 x 62 x 14 mm, 25 degree contact angle, matched duplex pair at light preload, phenolic cage, ABEC 7/9.
List Price
$180.90
12 in stock
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM9107WIDUL |
| GTIN | 087796072244 |
| Model | 3MM 9107 WI DUL / B 7007 E T DUL P4 / 7007A5 7007ACD |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 35 mm (1.3780 in) |
| OD | 62 mm (2.4409 in) |
| Width | 14 mm (0.5512 in) per bearing |
| Material | Bearing Steel |
|---|---|
| Series | 9100WI (ISO 7007 envelope) |
| Lubricant | Grease or oil |
| Preload | Light (DUL) |
| Base Number | 3MM9107WI |
| Industry Terms | Super precision spindle bearing; matched duplex pair; ABEC 9 angular contact; machine tool spindle bearing; WI series bearing |
| Common Misspellings | 3MM9107WIDUL; 3MM9107 WI DUL; Fafnir 3MM9107WI-DLU; 3MM91O7WI-DUL |
| Application Types | Machine tool spindles; grinding spindles; precision gearboxes; rotary tables |
| Total Width | 28 mm (1.1024 in) across the matched pair |
| Bore Shaft Size | 35 mm (1.3780 in) |
| Mpn Variants | 3MM9107WI-DUL; 3MM9107WIDUL; 3MM 9107 WI DUL; 3MM-9107-WI-CR-DUL; 3MM9107WICRDUL |
| Arrangement Configuration | Duplex universal pair (DUL), light preload |
| Precision Class | ABEC 7/9 (ISO P4S) |
| Additional Attributes | C1 ISO dynamic radial rating (per row): 18,400 N. This is a separate and lower Timken field, not the dynamic load rating. |
| Closure Type | Open |
| Dynamic Load Rating | 20,200 N (4,540 lbf) per bearing |
| Static Load Rating | 13,000 N (2,930 lbf) per bearing |
| Precision Rating | ABEC 7/9 (ISO P4S) |
| Rolling Elements | Steel balls |
| Limiting Speed | 22,300 rpm grease / 40,600 rpm oil |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 25° |
| Mounting Arrangement | Duplex universal pair (DU) |
| Design Units | Metric |
| Part Number | 3MM9107WI-DUL |
| Dynamic Load Rating C1 | 20,200 N (4,540 lbf) per bearing |
| Cage Type | Phenolic, outer-land-riding |
| Internal Clearance | Preloaded (light preload, duplex universal set) |
A super-precision angular contact ball bearing in the Fafnir WI spindle series, supplied as a factory-matched duplex pair. Bore: 35 mm (1.3780 in). Outside diameter: 62 mm (2.4409 in). Width: 14 mm (0.5512 in) per bearing. Total width: 28 mm (1.1024 in) across the pair.
Contact angle: 25°.
Dynamic radial load rating C1: 20,200 N (4,540 lbf) per bearing.
Static radial load rating C0: 13,000 N (2,930 lbf) per bearing.
Limiting speed, grease: 22,300 rpm.
Limiting speed, oil: 40,600 rpm.
Precision class: ABEC 7/9, ISO P4S.
Cage type: Phenolic, outer-land-riding.
Rolling elements: Steel balls.
Bore type: Straight.
Seal type: Open.
3MM: 25° contact angle in the Fafnir scheme. A 2MM prefix on the same envelope would be 15°. 9107: the leading 9 marks the ISO 70 light series, and the size corresponds to a 7007 at 35 mm bore and 62 mm outside diameter. WI: super-precision spindle bearing series. DUL: duplex universal pair, light preload. The MM prefix carries the P4S class, ABEC 7 dimensional tolerances with ABEC 9 running accuracy.
A 25° contact angle carries appreciably more thrust and delivers greater axial stiffness than the 15° variant of the same envelope, in exchange for a lower speed limit and more heat generation. Light preload keeps friction and temperature rise at the low end of the preload range while retaining the stiffness the 25° angle contributes, which is the usual choice for a spindle that has to hold position under cutting thrust rather than simply spin fast. P4S running accuracy at ABEC 9 is the tightest runout grade Fafnir published for this series.
One matched duplex pair, two bearings supplied as the sale unit. Universal grinding allows the pair to be assembled back-to-back, face-to-face or in tandem. The C1 and C0 ratings above are stated per bearing.
Internal clearance: preloaded, light preload ground into the ring faces.
The preload is ground into the ring faces and is realised when both inner rings and both outer rings are clamped solidly against their seats. Alignment marks on the outer ring faces set the intended arrangement. Lubricant: grease or oil, suited to the phenolic cage.
The ISO shorthand for this size and angle is 7007 AC, and the designation appears as 7007 A or 7007 E in some schemes. Same-envelope bearings at a 15° contact angle, such as a 2MM9107WI, or at medium or heavy preload, are related sizes rather than interchanges. A 3MM207WI is the heavier 72-series section on the same 35 mm bore, not a substitute.
Rockwell’s own product page for the Kinetix 6000 is down
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