NSK7020CTDBCP18PA7Super Precision Angular Contact Bearing — 100 mm ID, 150 mm OD, 24 mm Width, Open, 15° Contact Angle, Back-to-Back DB Set, 2 Pcs

Product Description

What this part is:

NSK 7020CTDBCP18PA7 is a factory-matched back-to-back (DB) set of two super-precision single row angular contact ball bearings, 100 x 150 x 24 mm, ISO 70 dimension series, at a special preload. Unit Quantity: 2 Pcs.

Decoding the designation:

7020 — ISO 70 dimension series, bore code 20, 100 mm bore.

C — 15° contact angle.

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

DB — back-to-back matched pair, ground as a set at the factory.

CP18 — special preload, made to order.

PA7 — ABEC 7 class accuracy, equal to P4.

Specifications:

Bore Diameter: 100 mm. Outside Diameter: 150 mm. Width: 24 mm per bearing. Total Width: 48 mm as a back-to-back pair. Contact Angle: 15°. Precision Class: ABEC 7 / P4. Dynamic Load Rating Cr: 95,000 N. Static Load Rating C0r: 77,000 N. Permissible axial load Pa: 49,000 N. Limiting Speed: 9,200 rpm on grease and 14,000 rpm on oil or oil-air. Cage Material: phenolic resin. Cage Type: outer-ring guided. Rolling Elements: Balls. Number Of Rows: 1 per bearing. Bore Type: Straight. Seal Type: Open. Material: Chrome bearing steel. Mass: 1.27 kg per bearing. Factor f0: 16.0.

Dimensions and mounting:

Mounting Arrangement: back-to-back (DB). Effective load centre a: 28.7 mm. Shaft abutment diameter da: 109 mm minimum. Housing abutment diameter Da: 141 mm maximum. Housing abutment diameter Db: 144 mm maximum. Ring chamfer r: 1.5 mm minimum. Ring chamfer r1: 1 mm minimum. Shaft fillet radius ra: 1.5 mm maximum. Shaft fillet radius rb: 0.8 mm maximum. Grease charge: 6.7 g per bearing.

Compatibility and replacement:

Related NSK executions on the same 100 x 150 x 24 mm envelope: 7020CTYDBP4B with a ball-guided cage at the same 15° contact angle, and 7020A5TDBP4 with a 25° contact angle.

Frequently asked questions:

What are the dimensions of the NSK 7020CTDBCP18PA7?

Each bearing is 100 mm bore, 150 mm outside diameter and 24 mm wide. The back-to-back pair is 48 mm wide.

What do the C, DB and CP18 codes mean?

C is a 15° contact angle, DB is a back-to-back matched pair, and CP18 is a special made-to-order preload.

What load ratings and speeds does it have?

Dynamic load rating 95,000 N, static load rating 77,000 N. Limiting speed 9,200 rpm on grease and 14,000 rpm on oil or oil-air.