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Needle roller bearing is a roller bearing with cylindrical rollers. Compared with its diameter, the rollers are thin and long. This kind of roller is called needle roller.

Part Number

d - Bore

D - Outer Diameter

B - Width

Cr - Dynamic Radial Rating

Cor - Static Radial Rating

Reference speed

Limiting speed

NA4908-RSR-XL 40 mm 62 mm 23 mm 41000 N 53000 N - -
NA4908-XL 40 mm 62 mm 22 mm 48500 N 67000 N 5000 rpm 9200 rpm
NA6908-ZW-XL 40 mm 62 mm 40 mm 74000 N 116000 N 5100 rpm 9200 rpm
NKI40/20-TV-XL 40 mm 55 mm 20 mm 35000 N 62000 N 5600 rpm 10200 rpm
NKI40/30-TV-XL 40 mm 55 mm 30 mm 52000 N 103000 N 5400 rpm 10200 rpm
NKIS40 40 mm 65 mm 22 mm 42500 N 67000 N 4850 rpm 8900 rpm
NKS40 - 55 mm - 38000 N 54000 N 6600 rpm 10900 rpm
RNAO40X50X17 - 50 mm - 21400 N 41500 N 7000 rpm 11500 rpm
RNAO40X50X17-XL - 50 mm - 24200 N 41500 N 7000 rpm 11500 rpm
NK42/20-XL - 52 mm - 30000 N 49000 N 6600 rpm 10900 rpm
NK42/30-XL - 52 mm - 44500 N 82000 N 6400 rpm 10900 rpm
NKI42/20-XL 42 mm 57 mm 20 mm 32500 N 56000 N 5600 rpm 9800 rpm
NKI42/30-XL 42 mm 57 mm 30 mm 48500 N 94000 N 5400 rpm 9800 rpm
NK43/20-XL - 53 mm - 30500 N 51000 N 6500 rpm 10700 rpm
NK43/30-XL - 53 mm - 45500 N 85000 N 6300 rpm 10700 rpm
NKS43-XL - 58 mm - 44000 N 57000 N 6200 rpm 10200 rpm
NA4909-2RSR-XL 45 mm 68 mm 23 mm 43000 N 59000 N - -
NA6909-ZW-XL 45 mm 68 mm 40 mm 79000 N 127000 N 4750 rpm 8600 rpm
NK45/30-TV-XL - 55 mm - 52000 N 103000 N 5700 rpm 10200 rpm
NKS45 - 60 mm - 40500 N 60000 N 6000 rpm 9800 rpm