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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:
4 in stock
Super-precision angular contact ball bearing, 70 mm bore, 125 mm outside diameter, 24 mm width. 25 degree contact angle, ABEC 7, light preload, universally ground. Sold as 3 Pcs.
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$315.53
4 in stock
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 3MM214WI-TUL |
| Model | 3 MM 214 WI TUL / 7214 A/A5/ACD/E T TUL P4 / B7214E |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 70 mm |
| OD | 125 mm |
| Width | 24 mm |
| Material | Bearing Steel |
|---|---|
| Series | 200 |
| Base Number | 3MM214WI |
| Industry Terms | super precision spindle bearing; machine tool bearing; angular contact ball bearing; universally ground single; light preload bearing |
| Common Misspellings | Fafnier; Faffnir; 3MM214W1; 3MM214WI TUI |
| Application Types | Machine tool spindles; grinding spindles; high-speed gearboxes; precision rotary tables |
| Bore Shaft Size | 70 mm (2.7559 in) |
| Mpn Variants | 3MM214WI-TUL; 3MM214WITUL; 3 MM 214 WI TUL; 3MM214WI TUL |
| Manufacturer Status | Fafnir is a Timken brand |
| Closure Type | Open |
| Rolling Elements | Ball |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50 |
| Contact Angle | 25° |
| Part Number | 3MM214WI-TUL |
A Fafnir 3MM214WI-TUL 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 25° contact angle carries more thrust and less speed than a 15° ring of the same envelope, which suits a spindle whose axial cutting load dominates. Light preload keeps the running temperature and the frictional torque down at the cost of some axial stiffness. 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.
3 Pcs, each a universally ground single. All three carry the same 3MM214WI-TUL designation.
ISO base number 7214, angle-designated 7214AC. Searchable forms are 3MM214WI-TUL, 3MM214WITUL and 3 MM 214 WI TUL. A 2MM214WI ring is the 15° version of the same envelope and is a related size, not an interchange; TUM and TUH are the medium and heavy preload grades and are likewise related sizes.
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