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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
Availability:
1 in stock
Super-precision angular contact ball bearing set, 55 x 100 x 21 mm, 25 degree contact angle, light preload, back-to-back against a tandem pair.
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$474.27
1 in stock
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| MFR / Brand | SKF |
|---|---|
| MPN | 7211ACDP4ATBTB |
| Model | 7211ACD/P4A TBTB |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 55 mm |
| OD | 100 mm |
| Width | 21 mm per bearing |
| Material | Bearing steel |
|---|---|
| Series | 72 (ISO 72, medium section) |
| Lubricant | Oil Preservative |
| Preload | Light |
| Base Number | 7211 |
| Industry Terms | spindle bearing, super precision bearing, machine tool bearing, matched triplex set, TBT arrangement, ABEC 7 |
| Bore Shaft Size | 55 mm |
| Mpn Variants | 7211 ACD/P4ATBTB, 7211ACDP4ATBTB, 7211-ACD-P4A-TBTB, 7211ACD/P4A TBTB, 7211ACDTBTB |
| Rolling Elements | Steel balls |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50.28 |
| Part Number | 7211 ACD/P4ATBTB |
| Cross Reference 1 | FAG B7211-E-T-P4S – single bearing, not a matched set |
|---|---|
| Cross Reference 2 | SKF 7211 CD/P4ATBTB – 15° contact angle |
| Cross Reference 3 | SKF 7211 ACD/P4ATBTA – extra light preload |
SKF 7211-ACD/P4ATBTB super-precision angular contact ball bearings, supplied as a ready-to-mount matched triplex set. Series: 72, medium section. Bore: 55 mm. Outside Diameter: 100 mm. Width: 21 mm per bearing. Open on both faces, machined fabric-reinforced phenolic resin cage, steel balls on steel raceways. Searchable forms: 7211 ACD/P4ATBTB, 7211ACDP4ATBTB, 7211-ACD-P4A-TBTB, 7211ACD/P4A TBTB.
Contact Angle: 25°. Precision Class: P4A — ABEC 7 dimensional tolerance with running accuracy held to ABEC 9. Set configuration: triplex, back-to-back against a tandem pair. Preload: light. Cage: machined phenolic resin, rated for continuous service to 120°C.
A back-to-back arrangement takes thrust in both directions and resists moment loading, so it locates a shaft axially in a single bearing position. The tandem pair shares thrust in the primary direction between two rows, roughly doubling axial capacity that way. Per bearing: Dynamic Load Rating 52.7 kN, Static Load Rating 40.5 kN. Limiting speed: 13 000 r/min. Light preload balances shaft location stiffness against heat generation at speed.
Matched triplex set: two bearings in tandem, the third mounted back-to-back against them. Unit Quantity: 3 Pcs. Open bearings, protected with an oil preservative for storage.
The bearings are ground as a set and are mounted together in the order and orientation marked on the outer ring faces. The phenolic cage sets the temperature ceiling at 120°C. Preloaded bearings run without internal clearance, so shaft and housing seats are held to super-precision tolerances.
FAG B7211-E-T-P4S is the matching 25° bearing sold as a single, not as a matched set. SKF 7211 CD/P4ATBTB is the same set at a 15° contact angle. SKF 7211 ACD/P4ATBTA is the same set at extra light preload.
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A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
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