NSK60BNC19TDBLP4Super Precision Angular Contact Bearing — 60 mm ID, 85 mm OD, 13 mm Width, Open, Back-to-Back DB Set, Light Preload, P4, 2 Pcs

Product Description

What this part is

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.

Decoding the order code

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.

What these specs mean in practice

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.

Quantity and configuration

Two pieces, matched back-to-back at light preload. Total width 26 mm.

Fitting notes

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.

Interchange guidance

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.