NSK7017ADBC7P6Angular Contact Ball Bearing – Straight Bore, 85 mm ID, 130 mm OD, 22 mm Width, Open, 30° Contact Angle, C7 Preload, P6 Precision

Product Description

What this part is

NSK 7017ADBC7P6 angular contact ball bearing. Bore: 85 mm. Outside diameter: 130 mm. Width: 22 mm. Series: 7000, ISO 70 dimension series. Bore form: straight. Closure: open.

Decoding the designation

A: 30° contact angle. DB: back-to-back matched arrangement. C7: preload class. P6: ISO precision class 6, equivalent to ABEC 3. The -1/2PR suffix marks one half of a factory pair. Searchable forms include 7017ADBC7P6, 7017-A-DB-C7-P6, 7017A DB C7 P6, 7017ADBL P6 and 7017A. The carton also carries the Fafnir cross-reference 3M9117WI CR DB.

What these specs mean in practice

Basic dynamic load rating: 69.0 kN. Basic static load rating: 53.5 kN. Limiting speed: 7,000 rpm on grease, 9,400 rpm on oil-air. Permissible axial load: 33.0 kN. Effective load centre: 42.0 mm. A 30° contact angle is the high-thrust execution of this envelope: more axial capacity and higher axial stiffness than a 15° bearing, at a lower speed ceiling. P6 precision holds tighter tolerances than standard class, giving closer shaft location and lower running vibration. The C7 preload class fixes the axial force the ground faces develop on clamp-up, so a set reaches a repeatable stiffness without shimming.

Quantity and configuration

One bearing: one half of a factory back-to-back pair, marked -1/2PR. It is a complete single-row bearing with its own inner ring, outer ring, balls and cage, ground to mate with the other half of a C7 set.

Fitting notes

Shaft abutment diameter: 92 mm minimum. Housing abutment diameter: 123 mm maximum, 125 mm on the outer shoulder. Shaft fillet radius: 1 mm maximum; housing fillet radius: 0.6 mm maximum. Recommended grease charge: 4.9 g.

Interchange guidance

Fafnir 3M9117WI covers the same 85 x 130 x 22 mm envelope, and the 9117 number maps to the ISO 7017 size. 7017CTY at 15° and 7017A5TY at 25° are related sizes rather than interchanges, because the contact angle changes thrust capacity and speed rating.