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Super-precision angular contact ball bearing, 110 mm bore, 200 mm OD, 38 mm wide. 15 degree contact angle, duplex light preload, open. Supplied as a matched pair, 2 Pcs.
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| MFR / Brand | Fafnir |
|---|---|
| MPN | 2MM222WIDUL |
| Model | 2MM 222 WI DUL |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 110 mm |
| OD | 200 mm |
| Width | 38 mm |
| Material | Chrome Steel |
|---|---|
| Series | 200 |
| Condition | New – Open box |
| Preload | Light preload |
| Base Number | 7222 |
| Industry Terms | Spindle bearing; super precision bearing; machine tool bearing; matched pair; duplex set; ABEC 7 |
| Common Misspellings | Faffnir; Fafner; Fafnir 2MM222WIDUL; 2M222WI-DUL |
| Application Types | Machine tool spindles; grinding spindles; high-speed precision rotation |
| Total Width | 76 mm (2.9921 in) for the mounted pair |
| Condition Note | Made In USA, New Old Stock, Replaces: 222-HDL 7222 C/CD/CT DUL P4, Q20222 |
| Bore Shaft Size | 110 mm (4.3307 in) |
| Mpn Variants | 2MM222WI-DUL; 2MM-222-WI-DUL; 2MM222WIDUL; 2MM 222 WI DUL; 222-HDL; Q20222 |
| Manufacturer Status | Fafnir super-precision line, now branded Timken |
| Arrangement Configuration | Universal duplex, mountable back-to-back, face-to-face or tandem |
| Precision Class | P4S (ABEC 7/9) |
| Min Temp | -20 °C |
| Cage Type | Machined |
| Dynamic Load Rating | 170 kN / 38217 lbf |
| Static Load Rating | 186 kN / 41814 lbf |
| Precision Rating | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Max Temp | 120 °C |
| Item Weight | 10.8 lbs |
| Cage Material | Phenolic |
| Limiting Speed | 7500 rpm |
| Number Of Rows | 1 per bearing, 2 rows as the mounted pair |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50.28 |
| Contact Angle | 15 degrees |
| Mounting Arrangement | Universal |
| Design Units | Metric |
| Bearing Material | Through-hardened bearing steel |
| Part Number | 2MM222WI-DUL |
| Cross Reference 1 | Timken 2MM222WI DUL |
|---|---|
| Cross Reference 2 | SKF 7222 CD/P4ADGA |
| Cross Reference 3 | FAG B7222-C-T-P4S-DUL |
| Cross Reference 4 | NSK 7222CTRDULP4 |
A Fafnir 2MM222WI-DUL super-precision angular contact ball bearing, 110 mm bore by 200 mm outside diameter by 38 mm wide, supplied as a factory-matched duplex pair. Fafnir is Timken’s super-precision line and the two brands share the 087796 UPC prefix.
The 2MM prefix sets a 15° contact angle, and the MM prefix carries P4S precision, equivalent to ABEC 7/9. The absence of a leading 9 places the bearing in the ISO 72 dimension series, giving an ISO base number of 7222. The 222 size code corresponds to a 110 mm bore. WI marks the super-precision angular contact family and DUL denotes a duplex set at light preload.
A 15° contact angle favours speed and radial stiffness over thrust capacity, which is why it is the usual choice for machine tool spindles rather than heavy axial duty. Light preload holds the balls in defined contact for running accuracy while keeping frictional heat low, so the pair tolerates higher shaft speeds than a medium or heavy preload of the same size would.
Two bearings, ground as a universal duplex set. The rings are relieved so the pair mounts back-to-back, face-to-face or in tandem, and the preload comes up correctly when the two are clamped together without shims.
Duplex sets are installed as a unit and are not interchanged between sets, since the ground offsets are matched within the pair. Mounting is onto a clean straight journal against a square shoulder, with the marked faces oriented per the chosen arrangement.
The same-spec equivalents at 15° and P4-class precision with duplex light preload are the SKF 7222 CD/P4ADGA, the FAG B7222-C-T-P4S-DUL and the NSK 7222CTRDULP4. A 7222 in a 25° angle, a different preload grade or a single rather than duplex grind is a related size, not an interchange.
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