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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:
2 in stock
Super-precision angular contact ball bearing pair, 60 x 85 x 13 mm, 71912 envelope, outer-ring-guided phenolic cage, light preload, back-to-back, P4 accuracy.
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| MFR / Brand | NSK |
|---|---|
| MPN | 60BNC19TDBLP4 |
| Model | 60 BNC 19 T DBL P4 / 71912 7912 |
| Bearing Type | Angular Contact Ball Bearing, Open |
| ID | 60 mm (2.3622 in) |
| OD | 85 mm (3.3465 in) |
| Width | 13 mm (0.5118 in) |
| Material | Chrome bearing steel |
|---|---|
| Industry Terms | super precision spindle bearing; high speed spindle bearing; machine tool bearing; back-to-back matched pair; ABEC 7 angular contact; thin section angular contact |
| Common Misspellings | 60BNC19TDBLP4; 60 BNC19TDBLP4; 60BNC19T DBL P4; 60BCN19TDBLP4 |
| Application Types | High-speed machine tool spindles; grinding spindles; motorised spindle units |
| Bore Shaft Size | 60 mm (2.3622 in) |
| Mpn Variants | 60BNC19TDBLP4; 60BNC19-T-DBL-P4; 60 BNC 19 T DBL P4; 60BNC19TDULP4; 60BNC19; 71912; 7912 |
| Rolling Elements | Balls |
| Number Of Rows | 1 per bearing |
| Bore Type | Straight |
| Harmonization Code | 8482.10.50 |
| Part Number | 60BNC19TDBLP4 |
NSK 60BNC19TDBLP4, a high-speed super-precision angular contact ball bearing from NSK’s spindle range, supplied as two pieces matched back-to-back. Bore: 60 mm. Outside diameter: 85 mm. Width: 13 mm per bearing, 26 mm as a pair. Precision: P4, ABEC 7. Country of origin as recorded: Japan.
60: bore, 60 mm. 19: the dimension section, which puts this bearing on the 60 x 85 x 13 mm envelope shared with the ISO 71912. T: outer-ring-guided phenolic resin cage, rated to 120 °C and cleared to a 2.8 million dmn value. DB: back-to-back matched pair. L: light preload. P4: ISO Class 4 accuracy, ABEC 7.
This is a thin-section, high-speed spindle bearing: a 25 mm radial section on a 60 mm bore, which is what keeps ball size and centrifugal loading down at speed. The outer-ring-guided phenolic cage holds its running position at high dmn values, and is cleared to roughly twice the dmn limit of a ball-guided polyamide cage. Back-to-back mounting sets the two effective load centres wide apart, giving the pair its moment stiffness and its ability to carry thrust in both directions. Light preload removes axial play while keeping heat generation low.
Two pieces, matched back-to-back at light preload. Total width 26 mm.
Both faces are open. A back-to-back pair is fitted with the wide faces of the outer rings together. Bore and outside diameter tolerances are to ISO Class 4, so shaft and housing fits should be specified to match rather than to a standard-class table.
The envelope is shared with ISO 71912 and with the NSK 7912 designation, both 60 x 85 x 13 mm. Those are related sizes on envelope: a 71912 from any maker carries its own contact angle, cage and preload codes, and each of those changes the part. The searchable forms of this designation include 60BNC19TDBLP4, 60BNC19-T-DBL-P4, 60 BNC 19 T DBL P4, 60BNC19TDULP4, 71912 and 7912.
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