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Central Surplus Bearing Finder
A faster way to search our bearing inventory Today we’re launching the Central Surplus Bearing
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1 in stock
Matched duplex pair of single-row angular contact ball bearings, 55 mm bore x 100 mm OD x 21 mm width each, 15° contact angle, light preload. Sold as 2 pieces forming one set.
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$227.60
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| MFR / Brand | SNR |
|---|---|
| MPN | 7211CVDUJ74 |
| Model | 7211C T DUL P4 / 2MM211WI CR DUL / 7211 C V DU J74 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 55 mm |
| OD | 100 mm |
| Width | 21 mm |
| Material | Bearing Steel |
|---|---|
| Series | 7200 |
| Base Number | 7211 C |
| Industry Terms | Duplex bearing set, matched pair angular contact, spindle bearing pair, 15 degree angular contact, light preload set, 55mm bore duplex |
| Common Misspellings | 7211C DU J74, 7211cduj74, 7211 CDU J74, SNR 7211CDU J30, 7211-CDUJ74 |
| Application Types | Machine tool spindles, grinding spindles, high-speed gearboxes, screw drives, precision rotating assemblies |
| Bore Shaft Size | 55 mm (2.1654 in) |
| Mpn Variants | 7211CDUJ74, 7211 C DU J74, 7211-C-DU-J74, 7211CDU, 7211C, 7211 C |
| Rolling Elements | Ball |
| Number Of Rows | 1 per bearing, 2 in the assembled set |
| Bore Type | Straight |
| Snap Ring Included | Without Snap Ring |
| Harmonization Code | 8482.10.50 |
| Part Number | 7211CDUJ74 |
| Cross Reference 6 | NTN-SNR 7211CDUJ74 |
|---|
A matched duplex set of two single-row angular contact ball bearings, each 55 mm bore, 100 mm outside diameter, 21 mm width, giving 42 mm total width across the pair. The two rings are ground together at the factory so their faces produce a defined light preload when clamped together.
7211 — single-row angular contact ball bearing, 72 dimension series, bore code 11 = 55 mmC — 15° contact angleDU — duplex, two bearings ground as a matched setJ74 — light preload in the NTN-SNR super-precision preload scheme
A 15° contact angle favours speed and radial stiffness over thrust capacity. Light preload holds the balls in defined contact with minimal added friction and heat, which suits high rotational speed and moderate axial load.
A duplex set works as a unit: the two bearings share the axial load, take thrust in both directions when mounted back-to-back or face-to-face, and hold the preload that the matched grinding established. Mixing one half of a set with an unmatched bearing gives an undefined preload.
The J74 code belongs to the NTN-SNR super-precision preload family and is distinct from the J20/J30/J40/J50 radial internal clearance codes used on standard bearings.
Sale unit: 2 Pcs — one matched duplex setSingle row each, two rows total in the assemblyTotal width across the pair: 42 mm
The set mounts with the marked ring faces together in the orientation the factory grind was made for, clamped square against a rigid shoulder so the preload lands as designed. Clamping force goes through the rings, never through the balls, and the outer ring seats in a housing bore that supports it across its full width.
The ISO base number 7211 C describes a 55 x 100 x 21 mm 15° single-row angular contact bearing. As a light-preload matched duplex set the equivalents are SKF 7211 CD/P4ADGA, NSK 7211CDUL and NTN 7211CDBGDL. Same-envelope parts differing in preload class (J84 medium) or contact angle are related sizes rather than interchanges, since preload and angle set the stiffness and speed of the assembly.
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