Part Number MM40BS90-23 QUM, Fafnir® Single Row Ball Screw Support Bearings (MM-BS) On The Timken Company

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All Product Types > ENGINEERED BEARINGS > Ball Bearings > Precision Ball Bearings > Fafnir® Single Row Ball Screw Support Bearings (MM-BS) > Part Number MM40BS90-23 QUM


	Part Number MM40BS90-23 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.

Unit of Measure: Imperial Metric Both

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

Specifications

Manufacturing Part Number		MM40BS90-23QUM

Rows per Set		Quadruplex

Design Units		Metric

d - Bore		40 mm

Ball Type		STEEL

Cage Type		CR - Phenolic Outer Land Riding Cage

Dimensions

D - Outer Diameter		90 mm 3.5433 in

Bearing Width		23 mm 0.9055 in

Total Width		92 mm 3.622 in

Contact Angle		60 º

Basic Load Ratings

C0 - Static Radial Rating (per row)		60900 N 13700 lbf

Ce - Dynamic Radial Rating (per row)		41400 N 9310 lbf

C1 ISO - Dynamic Radial Rating (per row)		37300 N 8390 lbf

Factors

Limiting Speed (Grease) (per row)		2200 rpm

Limiting Speed (Oil)		4400 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

72.695 mm
2.862 in

Da - Outer Ring Backing Diameter

73.823 mm
2.9064 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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Part Number MM40BS90-23 QUM, Fafnir® Single Row Ball Screw Support Bearings (MM-BS)

Manufacturing Part Number

Rows per Set

Design Units

d - Bore

Ball Type

Cage Type

D - Outer Diameter

Bearing Width

Total Width

Contact Angle

C0 - Static Radial Rating (per row)

Ce - Dynamic Radial Rating (per row)

C1 ISO - Dynamic Radial Rating (per row)

Limiting Speed (Grease) (per row)

Limiting Speed (Oil)

R - Inner Ring "To Clear" Radius1

r - Outer Ring "To Clear" Radius2

da - Inner Ring Backing Diameter

Da - Outer Ring Backing Diameter

R - Inner Ring "To Clear" Radius¹

r - Outer Ring "To Clear" Radius²