NSK7210CTRDULP4YAngular Contact Ball Bearing, 50 mm ID, 90 mm OD, 20 mm Width, 15° Contact Angle, Light Preload, ABEC 7 / P4Y.

Product Description

What this part is:

NSK 7210CTRDULP4Y is a factory-matched, universally ground DUL pair of two super-precision single-row angular contact ball bearings. Each bearing is 50 mm bore, 90 mm outside diameter, 20 mm wide, with a 15° contact angle, light preload, P4Y tolerance class and an outer-ring-guided phenolic resin cage. Unit Quantity: 2 Pcs. Both cartons are sealed and shrink-wrapped together, serialised LA204878A and LA204878B, marked Made in England.

Decoding the designation:

7210 — ISO 7210 size, 02 dimension series, 50 x 90 x 20 mm.

C — 15° contact angle.

TR — outer-ring-guided phenolic resin cage, rated by NSK to 120°C.

DUL — universally ground duplex pair, L = light preload.

P4Y — NSK special accuracy class: bore and outside diameter tolerances exclusive to NSK, all other tolerances ISO Class 4 (ABEC 7).

Specifications:

Bore Diameter: 50 mm. Outside Diameter: 90 mm. Width: 20 mm per bearing, 40 mm for the pair. Contact Angle: 15°. Dynamic Load Rating (Cr): 54,000 N per bearing. Static Load Rating (C0r): 31,500 N per bearing. Permissible Axial Load (Pa): 21.1 kN. Limiting Speed: 16,500 rpm grease; 25,000 rpm oil or oil-air. Preload: Light, 248 N. Axial Rigidity at light preload: approximately 69 N/µm. Precision Class: P4Y (ABEC 7). Cage: phenolic resin, outer-ring guided. Closure: open. Rows: one per bearing. Item Weight: approximately 0.457 kg per bearing, 0.914 kg for the pair.

Dimensions and mounting:

Effective load centre (a): 19.4 mm. Shaft abutment diameter (da min.): 57 mm. Housing abutment diameter (Da max.): 83 mm; Db max.: 85 mm. Fillet radii: r min. 1.1 mm, r1 min. 0.6 mm, ra max. 1 mm, rb max. 0.6 mm. Recommended grease quantity: 2.8 g per bearing. The pair mounts back-to-back (DB), face-to-face (DF) or in tandem (DT).

Compatibility and replacement:

Cross-references: SKF 7210 CD/P4ADGA (extra light preload), FAG B7210-C-T-P4S-UL (light preload), Timken 2MM9210WI DUL (light preload), NTN 7210CT1GD2GL (light preload), Barden 210HDL, RHP 7210CTDULP4 (RHP now NSK).

Frequently asked questions:

What are the size and contact angle of the NSK 7210CTRDULP4Y?

Each bearing is 50 mm bore, 90 mm outside diameter and 20 mm wide, with a 15° contact angle.

How many bearings are included?

Two bearings: one factory-matched DUL pair, serialised LA204878A and LA204878B.

What do the TR, DUL and P4Y suffixes mean?

TR is an outer-ring-guided phenolic resin cage, DUL is a universally ground duplex pair with light preload, and P4Y is NSK’s special accuracy class built on ISO Class 4 (ABEC 7).