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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, 35 x 72 x 17 mm, 25° contact angle, ABEC 7, phenolic cage, open, light preload for thrust-loaded spindles.
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$93.21
1 in stock
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| MFR / Brand | Fafnir |
|---|---|
| Model | 3MM 207 WI TBL / B 7207 E P4 7207A5 7207ACD |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 35 mm |
| OD | 72 mm |
| Width | 17 mm |
| Material | Bearing Steel |
|---|---|
| Series | 3MM |
| Base Number | 7207 |
| Industry Terms | super precision bearing, spindle bearing, machine tool bearing, high precision angular contact, ABEC 7 bearing, precision spindle bearing, phenolic cage bearing, 25 degree angular contact |
| Common Misspellings | Fafnir, Fafner, Faffnir, Fanfir, Fafnier, 3MM207WI TBL, 3MM207WTBL, 3M207WITBL, 3MM207WIBL, 3MM207WITB |
| Application Types | Machine tool spindles, milling and drilling spindles, grinding spindles, boring heads, precision rotary tables, high speed gearboxes, indexing and metrology equipment |
| Bore Shaft Size | 35 mm |
| Mpn Variants | 3MM207WITBL-1/3SET, 3MM207WITBL, 3MM207WITBL1/3SET, 3MM-207-WI-TBL, 3MM 207 WI TBL, 3MM207WI TBL, 3MM207WI, 3MM207, 3MM-207-WI, 3MM 207 WI |
| Manufacturer Status | Fafnir brand discontinued; product line continued under Timken (Fafnir to Timken obsolescence trail) |
| Compatible With Replaces | Replaces Fafnir 3MM207WI series bearings in machine tool spindle positions specifying 25 degree contact angle, ABEC 7 precision, phenolic machined cage and light preload at the 35x72x17 mm envelope |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50.68 |
| Part Number | 3MM207WITBL-1/3SET |
| Cross Reference 6 | 7207C / 7207-C (NSK, 15 degree) |
|---|---|
| Cross Reference 7 | B7207-E / B7207E / B 7207 E (FAG) |
| Cross Reference 9 | 2MM207WI / 2MM-207-WI (Fafnir 15 degree sibling - angle differs) |
Fafnir 3MM207WITBL-1/3SET super-precision angular contact ball bearing, now supplied under the Timken brand. Bore: 35 mm. Outside Diameter: 72 mm. Width: 17 mm. Contact Angle: 25°. Precision Class: ABEC 7 / P4. Series: WI super-precision machine-tool spindle series. Base Number: 7207. Cage: machined one-piece phenolic textile laminate. Closure: Open. Preload: Light. Rolling Elements: Ball. Number of Rows: 1. Bore Type: Straight. Mounting Arrangement: Universal. Design Units: Metric. Country of Origin: United States.
3MM: 25° nominal contact angle in the Fafnir and Timken super-precision scheme. 207: ISO 72-series boundary dimensions, 35 x 72 x 17 mm, ISO base number 7207. WI: super-precision machine-tool spindle series. T: machined one-piece phenolic textile-laminate cage. L: light preload class. -1/3SET: carton marking for one piece of a three-bearing set. Searchable forms of the designation: 3MM207WITBL-1/3SET, 3MM207WITBL, 3MM-207-WI-TBL, 3MM 207 WI TBL, 3MM207WI, 3MM-207-WI.
Basic Dynamic Load Rating (Cr): 32 kN. Basic Static Load Rating (C0r): 16.2 kN. Limiting Speed: 17,400 rpm. Maximum Operating Temperature: 120 °C. Minimum Operating Temperature: -30 °C. Material: bearing steel. Item Weight: 1.28 lbs. Harmonization Code: 8482.10.50.68.
Contact angle is the decisive number on this bearing. A 25° angle carries substantially more thrust load than a 15° bearing of the same envelope and accepts axial preload more readily, which is why 25° bearings dominate drilling, boring and heavily thrust-loaded spindle positions. The steeper angle moves the ball load path further off the radial plane and raises centrifugal cage and ball loading, so the speed ceiling and radial stiffness sit below those of a 15° bearing in the same bore.
Phenolic cotton-reinforced textile laminate is light, so cage centrifugal stress stays low at high DN values. It is mildly porous, so it holds oil and behaves forgivingly through a marginal-lubrication event. It also sets the temperature ceiling, which for this cage material is approximately 120 °C. Cleaning is compatible with conventional petroleum-based solvents.
Unit Quantity: 1 Pc. One bearing per unit. The -1/3SET carton marking identifies this piece as one of an original matched three-bearing set, sold individually.
Fafnir became part of Timken, so Fafnir to Timken is the obsolescence trail for a current replacement. Closest angle match: SKF 7207 ACD at 25°. Same-envelope alternatives at other contact angles: SKF 7207 CD at 15°, NSK 7207A5 at 30°, NSK 7207C at 15°, NSK 7207A, FAG B7207-E, and the Fafnir 15° sibling 2MM207WI. Interchange is governed by contact angle, precision class, cage material and preload class as well as by the 35 x 72 x 17 mm envelope.
Rockwell’s own product page for the Kinetix 6000 is down
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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