SKF Needle roller bearings

SKF Needle Bushings, HK 0509 5x 9x9

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

Additional markings:
RS: Sealing rings (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.