NAO 25X40X17

Single row needle roller bearings incorporate cylindrical rollers that are small in diameter relative to their length.

Owing to their large number of rollers, the bearings have a high load carrying capacity. Bearings without flanges on the outer ring are separable, i.e. the outer ring and the needle roller and cage assembly can be mounted separately.

• High radial load carrying capacity
• High stiffness
• Low cross-sectional height
• Accommodate axial displacement in both directions
• Separable design

Dimensions

d	25 mm	Bore diameter
D	40 mm	Outside diameter
B	17 mm	Width
E	35 mm	Raceway diameter outer ring
F	30 mm	Raceway diameter inner ring
r1,2	min.0.3 mm	Chamfer dimension outer ring
s	max.0.8 mm	Permissible axial displacement from the normal position of one bearing ring relative to the other

Abutment dimensions

da	34.4 mm	Smallest permissible abutment diameter shaft, bearings without flanges
db	29.5 mm	Smallest permissible abutment diameter shaft, bearings without flanges
Da	35.5 mm	Diameter of housing abutment
Db	30.6 mm	Smallest permissible abutment diameter housing, bearings without flanges
ra	max.0.3 mm	Fillet radius

Calculation data

Basic dynamic load rating	C	18.7 kN
Basic static load rating	C0	34 kN
Fatigue load limit	Pu	4.05 kN
Reference speed		13 000 r/min
Limiting speed		15 000 r/min