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Super-precision angular contact ball bearing, 110 x 170 x 28 mm, 15° contact angle, medium preload, phenolic outer-land-riding cage, ISO P4S tolerance.
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Here are some other options that might fit your project — cross-referenced equivalents and similar parts we have in stock and ready to ship. Need help choosing? Call 585-295-7880.
Angular Contact Ball Bearing - Straight Bore, 110 mm ID, 170 mm OD, 28 mm Width, Open, 25° Contact Angle, Medium Preload$464.70
Super-Precision Angular Contact Ball Bearing 110x170x28 mm 25° Light Preload ABEC 7$464.70
Super Precision Spindle Bearing 110x170x28 mm, 25° Contact Angle, P4 Class, Phenolic Cage, Universal Matching, Medium Preload$495.58
Angular Contact Ball Bearing - Straight Bore, 25 mm ID, 47 mm OD, 12 mm Width, Open, 15° Contact Angle, Light Preload.$146.06| MFR / Brand | Fafnir |
|---|---|
| MPN | 2MM9122WICR-SUM |
| Model | 2MM 9122 WI CR SUM 7022C |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 110 mm |
| OD | 170 mm |
| Width | 28 mm |
| Material | Bearing Steel |
|---|---|
| Series | 9100 WI |
| Preload | Medium |
| Base Number | 7022 |
| Industry Terms | super precision spindle bearing, machine tool bearing, phenolic cage bearing, ABEC 9 bearing |
| Common Misspellings | 2MM9122WICRSUM, 2MM 9122 WI CR SUM, Fafner, Faffnir, 2MM9122W1-SUM |
| Application Types | Machine tool spindles, grinding spindles, precision gearboxes, rotary tables |
| Total Width | 28 mm (1.102 in) |
| Bore Shaft Size | 110 mm (4.331 in) |
| Mpn Variants | 2MM9122WICR-SUM, 2MM9122WI-CR-SUM, 2MM-9122-WI-CR-SUM, 2MM9122WISUM, 2MM 9122 WI CR SUM, 2MM9122WI-CR-SUL, 7022-C, 7022CTRSULP4 |
| Arrangement Configuration | SU - single universally ground, stackable back to back, face to face or in tandem |
| Precision Class | P4S (ABEC 7 dimensional, ABEC 9 running accuracy) |
| Dynamic Load Rating C1 | 109 400 N (24 600 lbf) - Timken C1, 1M revs, single bearing |
| Additional Attributes | Max shaft fillet radius 2 mm; shaft backing shoulder diameter 122.3 mm; housing backing shoulder diameter 158.4 mm; outer ring to-clear radius 2.0 mm; Timken manufacturing part number 2MM9122WI SUM; Timken world part number 7022C-T-P4S-SUM |
| Min Temp | -30 °C |
| Cage Type | CR - Phenolic Outer Land Riding Cage |
| Dynamic Load Rating | 109 400 N (24 600 lbf) - Timken C1, 1M revs, single bearing |
| Static Load Rating | 102 700 N (23 100 lbf) - C0 |
| Precision Rating | ISO P4S (ABEC 7/9) |
| Rolling Elements | Ball |
| Max Temp | 120 °C |
| Item Weight | 4.50 lbs |
| Cage Material | Phenolic (Timken MBR) |
| Limiting Speed | 7 500 rpm grease / 15 000 rpm oil |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Not specified |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15° |
| Mounting Arrangement | Universal |
| Design Units | Metric |
| Part Number | 2MM9122WI-CR-SUM |
| Cross Reference 1 | FAG B7022-C-T-P4S-UM |
|---|---|
| Cross Reference 2 | NSK 7022CTRSUMP4 |
| Cross Reference 3 | RHP 7022CTSUMP4 |
| Cross Reference 4 | SKF 7022 CD/P4A |
| Cross Reference 5 | Timken world part number 7022C-T-P4S-SUM |
Fafnir 2MM9122WICR-SUM super-precision angular contact ball bearing, manufactured by The Timken Company. Bore: 110 mm (4.331 in). Outside Diameter: 170 mm (6.693 in). Bearing Width: 28 mm (1.102 in). Total Width: 28 mm. Rows per Set: single. Contact Angle: 15°. Precision Rating: ISO P4S (ABEC 7/9). Preload: medium. Cage Type: CR — Phenolic Outer Land Riding Cage. Ball Type: steel. Closure Type: open. Design Units: metric. Series: Fafnir 9100WI, the ISO 7022 section. Timken Manufacturing Part Number: 2MM9122WI SUM. Timken World Part Number: 7022C-T-P4S-SUM.
Dynamic Radial Load Rating, 1M revolutions (C1): 109 400 N (24 600 lbf), single bearing. Dynamic Radial Load Rating, ISO C1 per row: 99 300 N (22 300 lbf). Static Radial Load Rating (C0): 102 700 N (23 100 lbf). Limiting Speed, grease: 7 500 rpm. Limiting Speed, oil: 15 000 rpm.
2MM: 15° contact angle in the Fafnir super-precision scheme. MM: the super-precision execution, Precision Class P4S. 9122: the 9100WI light dimension series with ISO bore code 22, giving the 7022 section at 110 x 170 x 28 mm. WI: low shoulder on both rings. CR: phenolic outer land riding cage. SU: single universally ground. M: medium preload. Searchable forms include 2MM9122WICR-SUM, 2MM9122WICRSUM, 2MM-9122-WI-CR-SUM, 2MM 9122 WI CR SUM and 7022C-T-P4S-SUM.
Medium preload gives more axial stiffness than the light grade and generates less heat than the heavy grade, which is the usual choice for a general spindle rebuild. A 15° contact angle favours speed and radial rigidity over pure thrust capacity. The phenolic outer land riding cage is guided on the outer ring, which keeps cage motion stable at speed, and the resin retains oil. Universal grinding lets two or three bearings of this designation stack to the published preload without shims.
Max Shaft Fillet Radius: 2 mm (0.079 in). Shaft Backing Shoulder Diameter: 122.3 mm (4.820 in). Housing Backing Shoulder Diameter: 158.4 mm (6.240 in). Outer Ring To-Clear Radius: 2.0 mm (0.079 in). Bore form is straight.
Unit Quantity: 1 Pc. Single bearing, universally ground, mountable back to back, face to face or in tandem.
Same-specification equivalents at 15°, super precision, medium preload: FAG B7022-C-T-P4S-UM, NSK 7022CTRSUMP4, RHP 7022CTSUMP4, SKF 7022 CD/P4A. A 25° execution on this envelope, such as the Fafnir 3MM9122WI or an RHP 7022E form, is a related size at a different contact angle.
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