NSK7910A5TRDULP4YAngular Contact Ball Bearing – 50 mm ID, 72 mm OD, 12 mm Width, 25 Degree Contact Angle, Outer-Ring Guided Phenolic Cage, Light Preload

Product Description

What this part is:

NSK 7910A5TRDULP4Y super-precision angular contact ball bearings, supplied as a duplex pair at light preload (Unit Quantity: 2 Pcs). Series 79 (ISO dimension series 19, thin section), single row per bearing, open, straight bore, laminated phenolic cage. Bore 50 mm, outside diameter 72 mm, width 12 mm per bearing.

Decoding the designation:

7910 — NSK’s number for the 79 series, 50 x 72 x 12 mm. The same size is catalogued elsewhere as 71910.

A5 — 25° contact angle.

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

DU — duplex pair.

L — light preload class.

P4Y — NSK special precision class, held tighter than P4.

Specifications:

Bore Diameter: 50 mm. Outside Diameter: 72 mm. Width: 12 mm per bearing. Contact Angle: 25°. Cage Material: Laminated phenolic. Cage Type: Outer-ring guided. Preload: Light. Precision Class: P4Y. Dynamic Load Rating: 20,100 N per bearing. Static Load Rating: 14,200 N per bearing. Limiting Speed: 16,400 rpm grease; 24,600 rpm oil-air, single bearing. Lubricant: grease or oil. Item Weight: 0.132 kg per bearing. Country of Origin: United Kingdom.

Dimensions and mounting:

Effective load centre a: 20.2 mm. Chamfer r min: 0.6 mm. Chamfer r1 min: 0.3 mm. Shaft abutment diameter da: 55 mm minimum. Housing abutment diameter Da: 67 mm maximum. Second housing abutment diameter Db: 69.5 mm maximum. Fillet radius ra: 0.6 mm maximum. Fillet radius rb: 0.3 mm maximum. Total width as a pair: 24 mm.

Compatibility and replacement:

Same 25° envelope: SKF 71910 ACD/P4ADGA, FAG B71910-E-T-P4S, RHP 7910A5TRDULP4 (P4 class versus P4Y). Searchable variants of the designation: 7910A5TRDULP4Y, 7910-A5-TR-DUL-P4Y, 7910 A5 TR DUL P4Y, 71910, 7910A5. A 7910C on the same envelope has a 15° angle.

Frequently asked questions:

What contact angle does the NSK 7910A5TRDULP4Y have?

25°; A5 is NSK’s 25° code.

What are the load ratings of the NSK 7910A5TRDULP4Y?

Per bearing, dynamic load rating 20,100 N and static load rating 14,200 N (NSK).

What are the limiting speeds?

16,400 rpm on grease and 24,600 rpm on oil-air for a single bearing (NSK).