NSKAngular Contact Ball Bearing – 60 mm ID, 85 mm OD, 13 mm Width, 15° Contact Angle, Light Preload, ABEC 7

Product Description

What this part is

NSK 7912CTSULP4 single-row angular contact ball bearing, 79 extra-light series, 60 x 85 x 13 mm. Bore: 60 mm. Outside Diameter: 85 mm. Overall Width: 13 mm. Contact Angle: 15°. Precision Class: ISO Class 4, ABEC 7. Rolling Elements: Ball. Number Of Rows: 1. Bore Type: Straight. Closure Type: Open. Material: High Carbon Chrome Steel. Design Units: Metric. Item weight: 0.195 kg.

Decoding the designation

7912 — the ISO 71912 extra-light 19-series size, 60 x 85 x 13 mm.

C — a 15° contact angle, which favours speed and radial capacity over thrust capacity.

SU — single universally ground, so the bearing stacks with others of the same designation into a matched set in any orientation.

L — light preload, 113 N when paired.

P4 — ISO Class 4 running accuracy, equivalent to ABEC 7.

What these specs mean in practice

Dynamic Load Rating: 24.5 kN. Static Load Rating: 18.7 kN. Permissible Axial Load: 11.5 kN. Limiting Speed: 15,900 rpm grease / 24,200 rpm oil and oil-air. Preload: Light, 113 N in a DB or DF pair, with axial rigidity of 60 N per micrometre at that preload. The f0 factor is 16.5.

The 15° contact angle and the extra-light 13 mm section give a bearing built for high spindle speed and close running accuracy. Class 4 tolerances hold shaft position tightly and keep running vibration low. Lubricant: Grease or oil, with a grease charge of 1.1 g per bearing.

Mounting data

Chamfer dimension r min: 1 mm. Chamfer dimension r1 min: 0.6 mm. Shaft abutment diameter da min: 66 mm. Housing abutment diameter Da max: 79 mm. Housing bore relief Db max: 80 mm. Shaft fillet radius ra max: 1 mm. Housing fillet radius rb max: 0.5 mm. Effective load centre a: 16.2 mm.

Quantity and configuration

Unit Quantity: 1 Pc. The universal grinding lets this piece be built into a back-to-back, face-to-face or tandem set with further pieces of the same designation, in any orientation, and the L preload is what a DB or DF pair develops.

Interchange guidance

Cross-references: RHP 71912CTRSULP4, FAG B71912-C-T-P4S-SUL, SKF 71912 CD/P4A and Fafnir 2MM9312. Also written 71912C, 7912C and 7912-C-T-SUL-P4. All carry the 60 x 85 x 13 mm size, the 15° contact angle, the light preload and Class 4 accuracy. A 7912 with a different angle letter or preload letter is a related size rather than a substitution.