NTN7212BTG1P5Angular Contact Ball Bearing – 60 mm Bore, 110 mm OD, 22 mm Width, 40° Contact Angle, Open, ABEC 5

Product Description

What this part is

NTN 7212B single-row angular contact ball bearing. Bore Diameter: 60 mm. Outside Diameter: 110 mm. Overall Width: 22 mm. Contact Angle: 40°. Bore Type: Straight. Closure Type: Open. Rolling Elements: Ball. Number Of Rows: 1. Precision Class: ABEC 5 / P5. Bearing Material: High carbon chrome steel. Series: 72. Base Number: 7212. Unit Quantity: 1 Pc.

Decoding the designation

72 — ISO 72 medium dimension series angular contact ball bearing.

12 — bore code 12, giving a 60 mm bore.

B — 40° contact angle.

P5 — ISO tolerance class 5, ABEC 5.

What these specs mean in practice

Dynamic Load Rating: 56,000 N. Static Load Rating: 44,500 N. Contact Angle: 40°. Load centre a: 47.5 mm. Item Weight: 0.80 kg (1.75 lb). Precision Class: ABEC 5 / P5.

Forty degrees is the steepest angle in the standard angular contact range, so this bearing puts most of its capacity into thrust in one direction and correspondingly less into radial load and speed than a 15° or 25° execution. It is the choice where a shaft carries a heavy one-way axial load — a worm drive, a vertical spindle, a pump thrust position. A single bearing locates in one direction only; two mounted back-to-back or face-to-face locate both ways. P5 tightens bore, outside diameter and runout beyond the normal class.

Mounting data

Diameter of shaft abutment da min: 68.5 mm; db min: 65.5 mm. Housing abutment Da max: 101.5 mm; Db max: 104.5 mm. Bearing chamfers r 1.5 mm, r1 1.0 mm. Maximum abutment fillet radii ras max 1.5 mm, r1as max 1.0 mm. Stacked overall widths for multiple-row arrangements on this size: 44 mm for two rows, 66 mm for three, 88 mm for four.

Quantity and configuration

Unit Quantity: 1 Pc. Single bearing, open on both faces.

Interchange guidance

Same 60 x 110 x 22 mm envelope at the same 40° angle: SKF 7212 BEP, FAG 7212-B-XL-MP, NSK 7212B, RHP 7212B, Koyo 7212B, Nachi 7212B, SNR 7212B and MRC 7212P, whose P suffix is MRC’s 40° counterbored outer ring. NTN 7212C and 7212 in the same envelope run 15° and 30° respectively — related sizes with a different thrust-to-radial split rather than substitutions.