SKF Needle Bushings, HK 1512 15x21x12

Type HK needle bushings are needle bearings with a thin-walled outer ring made through a chipless manufacturing process. Their key features include a very low cross-section height and high load capacity. They are primarily used where the housing bores cannot be designed as raceways for needle cages and where particularly space-saving and economical bearings are desired. They are pressed into the housing bore and fit securely. This allows for simple and cost-effective manufacturing of the housing bores when no shoulders or retaining rings are needed for axial fixation. The outer ring made of hardened steel sheet and the cage-guided needle cage form a self-retaining unit. Main dimensions: ISO 3245:2007 / DIN 618-1:1993 / DIN 618-2:1993, as far as standardized.

Suffixes:
RS Sealing ends (NBR) on one side
2RS Steel sheet reinforced contact seals made of acrylonitrile-butadiene rubber (NBR) on both sides
TN Glass fiber reinforced cage made of polyamide 66.