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Deep Groove Ball Bearings: The Industry Default and When to Reach for Something Else
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Availability:
1 in stock
Super-precision angular contact ball bearing, 120 x 180 x 28 mm, 15° contact angle, phenolic outer-land-riding cage, open, ABEC 7/9.
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$305.97
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 2MM9124WI CR |
| Model | 7024C 2MM 9124 WI |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 120 mm |
| OD | 180 mm |
| Width | 28 mm |
| Material | Chrome steel |
|---|---|
| Series | 9100 |
| Lubricant | Grease or oil |
| Base Number | 2MM9124WI |
| Total Width | 28 mm |
| Bore Shaft Size | 120 mm |
| Mpn Variants | 2MM9124WI, 2MM9124WICR, 2MM-9124-WI-CR, 2MM 9124 WI |
| Precision Class | ABEC 7/9 (ISO P4S) |
| Dynamic Load Rating C1 | 111,200 N |
| Additional Attributes | Ball type: steel. Shaft backing shoulder diameter: 132.5 mm. Housing backing shoulder diameter: 168.3 mm. Maximum shaft fillet radius: 2 mm. Outer ring to-clear radius: 2 mm. ISO dynamic radial rating per row: 101,000 N. |
| Cage Type | CR – Phenolic Outer Land Riding Cage |
| Dynamic Load Rating | 111,200 N |
| Static Load Rating | 108,500 N |
| Precision Rating | ISO P4S (ABEC 7/9) |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Limiting Speed | 6,900 rpm grease / 13,800 rpm oil |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 15° |
| Bearing Material | Chrome steel |
| Cross Reference 1 | Timken 7024C-T-P4S |
|---|
Fafnir 2MM9124WI super-precision angular contact ball bearing, built by Timken. Bore: 120 mm. Outside Diameter: 180 mm. Bearing Width: 28 mm. Total Width: 28 mm. Contact Angle: 15°. Precision Class: ISO P4S (ABEC 7/9). Cage Material: Phenolic. Cage Type: outer-ring land riding, machined. Rolling Elements: steel balls. Closure Type: Open. Number of Rows: 1. Series: 9100. Bore Type: Straight.
2MM — Fafnir super-precision spindle execution at a 15° contact angle, ground to ISO P4S.
9124 — the 9100WI size series, ISO 7024 envelope, 120 x 180 x 28 mm.
WI — low shoulder on both rings.
CR — phenolic outer land riding cage.
Dynamic Radial Load Rating (C1): 111,200 N. Static Radial Load Rating (C0): 108,500 N. ISO dynamic radial rating per row: 101,000 N. Limiting Speed: 6,900 rpm on grease, 13,800 rpm on oil. Lubricant: grease or oil.
A 15° contact angle favours speed and radial stiffness over thrust capacity, which is what a large machine tool spindle bearing at this bore is usually chosen for. The phenolic cage is light, tolerates high surface speed and holds oil in its fabric base.
Unit Quantity: 1 Pc. Single-row bearing.
Shaft Backing Shoulder Diameter: 132.5 mm. Housing Backing Shoulder Diameter: 168.3 mm. Maximum Shaft Fillet Radius: 2 mm. Outer Ring To-Clear Radius: 2 mm.
Timken world part number: 7024C-T-P4S. Manufacturing part number: 2MM9124WI. The same bearing is written 2MM9124WICR, 2MM-9124-WI-CR and 2MM 9124 WI.
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