NSK7017A5TRDULP3Angular Contact Ball Bearing – 85 mm ID, 130 mm OD, 22 mm Width, 25 Degree Contact Angle, Outer-Ring Guided Phenolic Cage, Light Preload, P3

Product Description

What this part is

NSK 7017A5TRDULP3 super-precision angular contact ball bearings, supplied as a duplex pair at light preload. Series: ISO 10 (70xx). Bore: 85 mm. Outside Diameter: 130 mm. Width: 22 mm per bearing. Contact Angle: 25°. Cage Material: Laminated phenolic. Cage Type: Outer-ring guided. Preload: Light. Precision Class: P3. Rolling Elements: Ball. GTIN: 029176656545.

Decoding the designation

7017 — NSK’s number for the ISO 7017 size, 85 x 130 x 22 mm, dimension series 10.

A5 — 25° contact angle.

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

DU — duplex pair.

L — light preload class.

P3 — dimensional accuracy held to P4 and running accuracy held to P2.

What these specs mean in practice

Dynamic Load Rating: 71.5 kN per bearing. Static Load Rating: 55.5 kN per bearing. Limiting Speed: 9,400 r/min on grease and 14,000 r/min on oil-air, single bearing. Contact Angle: 25°. Effective load centre a: 36.1 mm. Chamfer r min: 1.1 mm. Chamfer r1 min: 0.6 mm. Mass: 0.904 kg per bearing.

P3 is the class that matters on a finishing spindle: the bore and outside diameter are held to P4 tolerances so the bearing fits standard P4 seats, while the raceway runout is held to P2, which is what shows up in the surface finish on the workpiece. A 25° contact angle steepens the load path against a 15° bearing, so the pair carries more thrust and more axial stiffness and gives up some top speed for it. The phenolic cage rides on the outer ring land, runs light and quiet, and tolerates the thin films of an oil-air feed.

Mounting data

Shaft abutment diameter da: 92 mm minimum. Housing abutment diameter Da: 123 mm maximum. Second housing abutment diameter Db: 125 mm maximum. Shaft or housing fillet radius ra: 1 mm maximum. Second fillet radius rb: 0.6 mm maximum.

Quantity and configuration

Unit Quantity: 2 Pcs. A duplex pair ground for light preload, clamping up against a plain spacer.

Interchange guidance

Equivalent 25° executions on the same envelope: SKF 7017 ACD/P4A, FAG B7017-E-T-P4S, RHP 7017A5TRDULP4. Searchable variants of the designation: 7017A5TRDULP3, 7017-A5-TR-DUL-P3, 7017 A5 TR DUL P3, 7017A5, RMS5. A 7017C on the same envelope carries a 15° angle, which raises the speed rating and lowers the thrust capacity.