NSK60TAC120BSUC10PN7BBall Screw Support Bearing — 60 mm ID, 120 mm OD, 20 mm Width, Open, 60° Contact Angle, Single Universally Matchable, ABEC 7

Product Description

What this part is

NSK 60TAC120BSUC10PN7B, a single-row ball screw support bearing. Bore: 60 mm. Outside diameter: 120 mm. Width: 20 mm. Series: TAC. Contact angle: 60°. Country of origin as recorded: Japan.

Decoding the order code

60: bore, 60 mm. TAC120: NSK’s ball screw support series, outside diameter 120 mm. B: the design execution. SU: single universally matchable, so any two bearings of this designation pair without a spacer. C10: special axial clearance or preload, made to order. PN7B: NES Class 7 accuracy, ABEC 7 class.

Ratings and speed

Basic dynamic load rating Cr: 82.5 kN (18,546 lbf). Basic static load rating C0r: 171 kN (38,442 lbf). Limiting speed: 3,000 rpm. Mass: 1.17 kg.

What these specs mean in practice

The 60° contact angle is what defines this family. It puts almost the whole load path along the screw axis, which is why a ball screw support bearing carries far more thrust than radial load and delivers very high axial rigidity per millimetre of section. The static rating sitting above the dynamic rating is normal for a 60° thrust type: C0r measures permissible raceway deformation under a stationary load and scales with the steep contact angle, while Cr describes fatigue life in rotation. Universal matching means single bearings can be stacked back-to-back, face-to-face or in tandem, and tandem is the usual choice on a screw end where thrust runs predominantly one way.

Quantity and configuration

One bearing, single universally matchable, open on both faces.

Fitting notes

Universally matchable bearings are ground so that any two of the same designation stack without a spacer and arrive at the specified preload. Bore and outside diameter tolerances are to ABEC 7 class, so the screw journal and housing fits should be specified to match rather than to a standard-class table.

Interchange guidance

Same-type equivalents on the 60 x 120 x 20 mm envelope at 60°: SKF BSB060120, Timken and Fafnir MM60BS120, and Barden 60BS120. The searchable forms of this designation include 60TAC120BSUC10PN7B, 60TAC120-B-SU-C10PN7B, 60TAC120 B SU C10 PN7B, 60TAC120B and 60TAC120.