NSK45TAC100BDFC10PN7AAngular Contact Thrust Ball Bearing for Ball Screw Support – 45 mm ID, 100 mm OD, 20 mm Width, Straight Bore, Open, Face-to-Face Matched Pair.

Product Description

What this part is

NSK 45TAC100BDFC10PN7A, an angular contact thrust ball bearing for ball screw support. Bore Diameter: 45 mm (1.7717 in). Outside Diameter: 100 mm (3.9370 in). Overall Width: 20 mm (0.7874 in). Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Bearing Material: Bearing steel. Series: TAC.

Decoding the designation

45TAC100 — NSK’s ball screw support angular contact thrust series. The leading number is the bore in millimetres and the number following TAC is the outside diameter in millimetres, so 45TAC100 is a 45 mm bore in a 100 mm outside diameter.

B — the second design generation within the TAC family.

DF — face-to-face pair. Two single-row bearings supplied as a matched set and mounted with their outer ring faces together.

What these specs mean in practice

Ball screw support bearings carry thrust along the screw axis and hold the screw in axial position under reversing load. The 45 mm bore seats on the screw journal and the 100 mm outside diameter locates in the support housing bore. Overall Width: 20 mm per bearing. A face-to-face pair sets the load lines converging inward, which gives a shorter effective bearing span and tolerates a small amount of shaft misalignment.

Quantity and configuration

Unit Quantity: 2 Pcs. Mounting Arrangement: Face-to-face (DF) matched pair.