NSK7217CTYE1DBC2P5Super-Precision Angular Contact Ball Bearings – 85 mm ID, 150 mm OD, 28 mm Width, 15° Contact Angle, Open, Back-to-Back Pair, P5

Product Description

What this part is

NSK 7217CTYE1DBC2P5 super-precision angular contact ball bearings. Bore: 85 mm. Outside diameter: 150 mm. Width: 28 mm each. Series: 72. Open on both faces, straight bore, ball-guided cage. Supplied as a back-to-back matched pair.

Decoding the designation

7217: series 72, bore code 17, 85 mm bore. C: 15° contact angle. TY: ball-guided cage. DB: back-to-back duplex pair. C2: NSK preload class. P5: ISO class 5, ABEC 5. E1 is carried as a manufacturer part-number variant and is searchable in that form.

What these specs mean in practice

Basic dynamic load rating: 135 kN per bearing. Basic static load rating: 90.5 kN per bearing. Permissible axial load: 60.5 kN. Limiting speed: 9,800 rpm on grease, 14,900 rpm on oil or oil-air. A back-to-back pair sets its contact lines diverging outward, which widens the effective support span and gives the shaft high resistance to tilting moments. A 15° contact angle keeps that stiffness available at speed.

Quantity and configuration

Two pieces, 2 Pcs, a factory back-to-back matched pair. Total stack width 56 mm.

Fitting notes

Straight bore, open on both faces. The pair mounts in the orientation marked on the ring faces. Inner rings clamp between a shaft shoulder and a locknut; outer rings seat square in the housing bore. Mass: 1.79 kg per bearing.

Interchange guidance

SKF 7217 CD/P5 and FAG B7217-C-T-P5-DB are the same 85 x 150 x 28 mm size at 15° in a back-to-back pair. NSK 7217A5TYDBC2P5 is a related size at a 25° contact angle. Searchable forms: 7217CTYE1DBC2P5, 7217C T Y E1 DB C2 P5, 7217-CTY-E1-DB-C2-P5, 7217C.