Part Number 3MMC301WICRQUM, Fafnir® Spindle Angular Contact Ball Bearings (9300WI, 9100WI, 200WI, 300WI) On The Timken Company

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All Product Types > ENGINEERED BEARINGS > Ball Bearings > Precision Ball Bearings > Fafnir® Spindle Angular Contact Ball Bearings (9300WI, 9100WI, 200WI, 300WI) > Part Number 3MMC301WICRQUM


	Part Number 3MMC301WICRQUM, Fafnir® Spindle Angular Contact Ball Bearings (9300WI, 9100WI, 200WI, 300WI)

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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

Rows per Set		Quadruplex

Design Units		Metric

d - Bore		12 mm

Ball Type		Ceramic

Cage Type		CR - Phenolic Outer Land Riding Cage

Cage Material		MBR Cage

Precision Rating		ISO P4S (ABEC 7/9)

Manufacturing Part Number		3MMC301WI QUM

Preload		Medium

Dimensions

D - Outer Diameter		1.457 in 37 mm

Bearing Width		0.472 in 12 mm

Total Width		1.890 in 48 mm

Contact Angle		25 º

Basic Load Ratings

C0 - Static Radial Rating (per row)

920 lbf
4090 N

Ce - Dynamic Radial Rating (per row)¹

2420 lbf
10800 N

C1 ISO - Dynamic Radial Rating (per row)

2200 lbf
9820 N

¹ Based on 10⁶ revolutions of calculated fatigue life.

Factors

Limiting Speed (Grease) (per row)		51400 rpm

Limiting Speed (Oil)		102800 rpm

Abutment and Fillet Dimensions

R - Inner Ring "To Clear" Radius¹

0.039 in
1.00 mm

r - Outer Ring "To Clear" Radius²

0.039 in
1 mm

da - Inner Ring Backing Diameter

0.690 in
17.4 mm

Da - Outer Ring Backing Diameter

1.270 in
32.1 mm

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 3MMC301WICRQUM, Fafnir® Spindle Angular Contact Ball Bearings (9300WI, 9100WI, 200WI, 300WI)

Rows per Set

Design Units

d - Bore

Ball Type

Cage Type

Cage Material

Precision Rating

Manufacturing Part Number

Preload

D - Outer Diameter

Bearing Width

Total Width

Contact Angle

C0 - Static Radial Rating (per row)

Ce - Dynamic Radial Rating (per row)1

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

Ce - Dynamic Radial Rating (per row)¹

R - Inner Ring "To Clear" Radius¹

r - Outer Ring "To Clear" Radius²