NSK7922CSN24TRDULP4YSuper Precision Angular Contact Bearing — 110 mm ID, 150 mm OD, 20 mm Width, Open, 15° Contact Angle, Ceramic Balls, Light Preload, 2 Pcs

Product Description

What this part is:

NSK 7922CSN24TRDULP4Y is a super-precision angular contact ball bearing with silicon nitride ceramic balls, supplied as two universally matchable pieces. Bore Diameter: 110 mm. Outside Diameter: 150 mm. Width: 20 mm per bearing. Series: 71900 (ISO 719 dimension series). Contact Angle: 15°.

Decoding the designation:

7922 — ISO 719 dimension series at bore code 22, 110 x 150 x 20 mm.

C — 15° contact angle.

SN24 — silicon nitride ceramic balls.

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

DU — universal duplex matching; any two bearings of this designation pair.

L — light preload.

P4Y — special class with special bore and outside diameter tolerances; other tolerances to ISO Class 4.

Specifications:

Basic Dynamic Load Rating Cr: 65.5 kN. Basic Static Load Rating C0r: 57.0 kN. Permissible Axial Load Pa: 42.4 kN. Limiting Speed: 11,600 rpm grease; 17,600 rpm oil or oil-air. Axial Rigidity at light preload: 138 N per micrometre. Preload Force at light preload: 447 N. Mass: 0.761 kg (1.68 lb) per bearing. Balls: silicon nitride. Rings: chrome bearing steel. Closure: open.

Dimensions and mounting:

Total Width as a pair: 40 mm. Effective Load Centre a: 27.4 mm. Shaft Abutment Diameter da: 117 mm minimum. Housing Abutment Diameter Da: 143 mm maximum; Db: 145 mm maximum. Ring Chamfer r: 1.1 mm minimum; r1: 0.6 mm minimum. Shaft Fillet Radius ra: 1 mm maximum. Grease Charge: 4.9 g per bearing.

Compatibility and replacement:

Cross-references: NSK 7922CSN24TRDUMP4Y (same ceramic bearing at medium preload); NSK 7922CTRDULP4Y (steel balls, lower limiting speed); SKF 71922 CD/P4ADGA (steel balls). Cataloged as ISO 71922.

Frequently asked questions:

What size is the NSK 7922CSN24TRDULP4Y?

Bore 110 mm, outside diameter 150 mm, width 20 mm per bearing, ISO 719 dimension series.

What does SN24 mean in this designation?

SN24 is NSK’s code for silicon nitride ceramic balls; the rings are chrome bearing steel.

How many bearings are supplied and what is the preload?

Two universally matchable (DU) pieces at light (L) preload of 447 N.