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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:
2 in stock
Super-precision angular contact ball bearing, 90 mm bore, 160 mm outside diameter, 30 mm width. 15 degree contact angle, ABEC 7, light preload, phenolic cage, universally ground single.
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$327.36
2 in stock
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 2MM218WI CR SUL |
| GTIN | 087796071094 |
| Model | 2MM218WICRSUL |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 90 mm |
| OD | 160 mm |
| Width | 30 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7200 |
| Lubricant | Oil |
| Base Number | 2MM218WI |
| Industry Terms | super precision spindle bearing; machine tool bearing; angular contact ball bearing; universally ground single; light preload bearing; phenolic cage bearing |
| Common Misspellings | Fafnier; Faffnir; 2MM218W1CR-SUL; 2MM218WICR SUI; 2MN218WICR |
| Application Types | Machine tool spindles; grinding spindles; high-speed milling heads; precision rotary tables |
| Bore Shaft Size | 90 mm (3.5433 in) |
| Mpn Variants | 2MM218WICR-SUL; 2MM218WICRSUL; 2MM-218-WI-CR-SUL; 2MM 218 WI CR SUL; 2MM218WI-SUL |
| Manufacturer Status | Fafnir is a Timken brand |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 15° |
| Part Number | 2MM218WICR-SUL |
A Fafnir 2MM218WICR-SUL super-precision angular contact ball bearing, single row, universally ground, from the WI machine-tool spindle series. Steel rings, steel balls, phenolic cage, open on both faces.
A 15° contact angle favours speed and radial stiffness over thrust capacity, which is the usual choice for a spindle front position. An outer-land-riding phenolic cage runs on the outer ring rather than on the balls, cutting cage wear and lubricant churn at speed. Light preload holds a lower running temperature and less frictional torque than the medium and heavy grades. Universal grinding means the faces are flush-ground, so any two rings of this designation seat together back-to-back, face-to-face or in tandem and arrive at the marked preload with no shims.
1 Pc, a universally ground single at light preload.
ISO base number 7218, angle-designated 7218C. Searchable forms are 2MM218WICR-SUL, 2MM218WICRSUL, 2MM-218-WI-CR-SUL and 2MM 218 WI CR SUL. A 3MM218WI ring is the 25° version of the same envelope and is a related size, not an interchange; SUM and SUH are the medium and heavy preload grades, and DU duplex sets are a different arrangement, so all are related sizes.
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