NTN BNT904
Single Angular Contact Ball Bearings for Motors and Lathes
(BRAND)：NTN
(Availability)：In Stock
Technical Specifications
Type
Main Spindle Bearing
Bore Type
Round
Material
High Carbon Chrome Steel
Cage Type
Machined
Cage Material
Phenolic Resin
Ball Material
Steel
Limiting Speed - Oil
70500 RPM
Limiting Speed - Grease
34900 RPM
Configuration
One
Factor
9.7
Static Load Rating
2990 N
Dynamic Load Rating
5600 N
Enclosure
Open
Operating Temperature Range
-40 to 120 ºC
Dimensional Specifications
d
20.000 mm
D
37.000 mm
B
9.000 mm
d1
25.500 mm
d2
23.500 mm
D1
31.400 mm
r
0.300 mm
r1
0.150 mm
Contact Angle
15 º
a
8.400 mm
da min
22.500 mm
db min
21.500 mm
Da max
34.500 mm
ras max
0.300 mm
r1as max
0.150 mm
Double Row Width
18.000 mm
Triple Row Width
27.000 mm
Quadruple Row Width
36.000 mm
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