Timing Belt Pulleys and V-Belt Sheaves: Matching Belt Drive Components Correctly
Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
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Duplex angular contact ball bearing pair, back-to-back (DB), 55 mm bore, 100 mm OD, 21 mm wide each, 30° contact angle, ABEC 7 / P4, phenolic cages.
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$122.38
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Here are some other options that might fit your project — cross-referenced equivalents and similar parts we have in stock and ready to ship. Need help choosing? Call 585-295-7880.
Angular Contact Ball Bearing - 55 mm ID, 100 mm OD, 21 mm Width, Open, ABEC 3 / P6, Light Preload.$42.49
Angular Contact Ball Bearing Matched Pair – 55 mm ID, 100 mm OD, 21 mm Width Each, 42 mm Pair, Open, 15° Contact Angle, Back-to-Back, Normal Preload, ABEC 7$291.56
Angular Contact Ball Bearing — 55 mm ID, 100 mm OD, 21 mm Width, 40° Contact Angle, Pressed Brass Cage, Universal Flush Ground$37.88
Super Precision Angular Contact Ball Bearing - 55 mm Bore, 100 mm OD, 21 mm Width, 25° Contact Angle, ABEC 7 / P4, Phenolic Cage$51.26| MFR / Brand | NTN |
|---|---|
| MPN | 7211T1DBP4C7 |
| Model | 7211 T1 DB P4 C7 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 55 mm |
| OD | 100 mm |
| Width | 42 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7200 |
| Total Width | 42 mm (pair) |
| Mpn Variants | 7211T1DBP4C7, 7211T1-DB-P4-C7, 7211 T1 DB P4 C7, 7211T1DB |
| Precision Class | ABEC 7 / P4 |
| Rolling Elements | Ball |
| Cage Material | Phenolic |
| Number Of Rows | 1 |
| Bore Type | Straight |
| Snap Ring Included | No |
| Harmonization Code | 8482.10.50.68 |
| Contact Angle | 30° |
| Mounting Arrangement | Back-to-back (DB) |
| Cross Reference 1 | NSK 7211A DB P4 |
|---|---|
| Cross Reference 2 | Koyo 7211 DB P4 |
| Cross Reference 3 | Nachi 7211 DB P4 |
NTN 7211 matched duplex pair of single-row angular contact ball bearings, arranged back-to-back. Bore Diameter: 55 mm. Outside Diameter: 100 mm. Overall Width: 21 mm per bearing. Total Width: 42 mm (pair). Contact Angle: 30°. Mounting Arrangement: Back-to-back (DB). Cage Material: Phenolic. Precision Class: ABEC 7 / P4. Rolling Elements: Ball. Closure Type: Open. Series: 7200.
7211 — 72 series angular contact ball bearing; bore code 11 gives a 55 mm bore. No angle letter: 30° contact angle.
T1 — phenolic resin cage.
DB — duplex back-to-back. Two single-row bearings ground as a matched set. Not a double-row bearing.
P4 — ISO class 4 precision, equivalent to ABEC 7.
The 30° angle balances radial and axial capacity; the back-to-back arrangement takes axial load in both directions and resists tilting moment. ABEC 7 tolerances and the lightweight phenolic cage suit precision spindle and machine tool duty.
Unit Quantity: 2 Pcs. One matched back-to-back pair.
Cross-Reference: NSK 7211A DB P4, Koyo 7211 DB P4 and Nachi 7211 DB P4 are 30° 55 x 100 x 21 mm angular contact bearings in back-to-back duplex form.
Belt drives may appear simple, consisting of two wheels and a belt for power transfer.
Tapered, cylindrical, and spherical roller bearings all solve the same basic problem, carrying more load
If you pulled a bearing off general industrial equipment at random, there’s a good chance
Our team can locate, cross-reference, and source all parts.
Our team can locate, cross-reference, and source all parts.
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