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Super-precision angular contact ball bearing, 35 mm bore, 62 mm OD, 14 mm wide. ISO 70 light series, P4S precision, open. 1 Pc.
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| MFR / Brand | Fafnir |
|---|---|
| MPN | MM9107K |
| Model | MM9107Kcr |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 35 mm |
| OD | 62 mm |
| Width | 14 mm |
| Condition | New – Open box |
|---|---|
| Material | Bearing Steel |
| Base Number | 7007 |
| Industry Terms | Spindle bearing; super precision bearing; machine tool bearing; ABEC 7 |
| Common Misspellings | Faffnir; Fafner; MM9107 K; MM910 7K |
| Application Types | Machine tool spindles; grinding spindles; precision rotation |
| Condition Note | Made in USA NOS |
| Bore Shaft Size | 35 mm (1.3780 in) |
| Mpn Variants | MM9107K; MM-9107-K; MM 9107 K; MM9107; 9107K |
| Manufacturer Status | Fafnir super-precision line, now branded Timken |
| Precision Class | P4S (ABEC 7/9) |
| Min Temp | -30°C |
| Cage Type | Phenolic |
| Dynamic Load Rating | 16 kN |
| Static Load Rating | 9.96 kN |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Balls |
| Max Temp | 120°C |
| Item Weight | 0.35 lbs |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Design Units | Metric |
| Running Accuracy | P4 |
| Part Number | MM9107K |
| Running Accuracy Radial And Axial Runout | P4 |
| Cross Reference 1 | Timken MM9107K |
|---|---|
| Cross Reference 2 | ISO base 7007 |
A Fafnir MM9107K super-precision angular contact ball bearing, 35 mm bore by 62 mm outside diameter by 14 mm wide. Fafnir is Timken’s super-precision line.
The MM prefix marks the super-precision family and carries P4S precision, equivalent to ABEC 7/9. The leading 9 in 9107 places the bearing in the ISO 70 light dimension series, giving an ISO base number of 7007, and the 07 size code gives a 35 mm bore.
P4S precision governs running accuracy: radial and axial runout are held to a fraction of a standard-class bearing, which is what allows a spindle to hold form at speed. The ISO 70 light series keeps the section thin for the bore, lowering mass and raising the attainable speed against a 72-series bearing of the same bore.
One bearing.
Mounting is onto a clean straight journal against a square shoulder. Precision-class bearings are fitted to measured interference rather than by feel, and the ring is driven only on the race being fitted.
The ISO base number is 7007, so the size envelope matches a 7007-series angular contact bearing from any maker. A true interchange also has to match contact angle, preload and cage, so a same-envelope 7007 from another brand is a related size until those match.
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