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Part Number MM25BS52 QUM, Fafnir® Single Row Ball Screw Support Bearings (MM-BS)

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Timken® angular contact ball bearings are designed for combination radial and axial loading. Single-row bearings have high thrust capacity in one direction. Some single-row bearings are specifically designed for duplex mounting in sets for maximum performance.




Specifications  · Dimensions  · Basic Load Ratings  · Factors  · Abutment and Fillet Dimensions

Specifications

Manufacturing Part Number
MM25BS52QUM

Rows per Set
Quadruplex

Design Units
Metric

d - Bore
25 mm

Ball Type
STEEL

Cage Type
CR - Phenolic Outer Land Riding Cage


Dimensions

D - Outer Diameter
52 mm
2.0472 in

Bearing Width
15 mm
0.5906 in

Total Width
60 mm
2.3624 in

Contact Angle
60 º


Basic Load Ratings

C0 - Static Radial Rating (per row)
27100 N
6100 lbf

Ce - Dynamic Radial Rating (per row)
26000 N
5850 lbf

C1 ISO - Dynamic Radial Rating (per row)
23400 N
5280 lbf


Factors

Limiting Speed (Grease) (per row)
4300 rpm

Limiting Speed (Oil)
8600 rpm


Abutment and Fillet Dimensions

R - Inner Ring "To Clear" Radius1
0.8 mm
0.031 in

r - Outer Ring "To Clear" Radius2
0.800 mm
0.031 in

da - Inner Ring Backing Diameter
37.033 mm
1.458 in

Da - Outer Ring Backing Diameter
38.034 mm
1.4974 in
1 Maximum housing fillet radius that bearing corners will clear.
2 Maximum shaft fillet radius that bearing corners will clear.



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