Part Number S12K, Fafnir® Miniature Ball Bearings (S..K) On The Timken Company

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All Product Types > ENGINEERED BEARINGS > Ball Bearings > Deep Groove Ball Bearings > Fafnir® Miniature Ball Bearings (S..K) > Part Number S12K


	Part Number S12K, Fafnir® Miniature Ball Bearings (S..K)

Fafnir® Extra Small Imperial Ball Bearings (S..K)

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Radial ball bearings consist of an inner and outer ring with a cage containing a complement of precision balls. The standard Conrad-type bearing has a deep-groove construction capable of handling radial and axial loads from either direction in versatile designs that permit relatively high-speed operation.

In addition to standard single-row deep groove bearings, Timken offers special designs, including a maximum capacity series and an extra large (XLS) radial series bearing.

Size range: 3 mm - 600 mm (0.12 in. - 23.62 in.) bore

Unit of Measure: Imperial Metric Both

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

Specifications

Design Units		Imperial

Ball Type		STEEL

Manufacturing Part Number		S12K Z5 FS50000

Dimensions

d - Bore		1 1/4 in

D - Outer Diameter		2.2500 in 57.150 mm

Bearing Width		0.375 in 9.525 mm

Basic Load Ratings

C0 - Static Radial Rating		1880 lbf 8363 N

Ce - Dynamic Radial Rating		3290 lbf 14635 N

Factors

Limiting Speed (Grease)		6960 rpm

Limiting Speed (Oil)		8120 rpm

Abutment and Fillet Dimensions

R - Inner Ring "To Clear" Radius

0.03 in
0.8 mm

r - Outer Ring "To Clear" Radius¹

0.03 in
0.800 mm

da - Inner Ring Backing Diameter

1.510 in
38.40 mm

Da - Outer Ring Backing Diameter

2.200 in
55.9 mm

¹ These maximum fillet radii will be cleared by the bearing corners.

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		Catalog and Technical Information - DGBB

Part Number S12K, Fafnir® Miniature Ball Bearings (S..K)

Design Units

Ball Type

Manufacturing Part Number

d - Bore

D - Outer Diameter

Bearing Width

C0 - Static Radial Rating

Ce - Dynamic Radial Rating

Limiting Speed (Grease)

Limiting Speed (Oil)

R - Inner Ring "To Clear" Radius

r - Outer Ring "To Clear" Radius1

da - Inner Ring Backing Diameter

Da - Outer Ring Backing Diameter

r - Outer Ring "To Clear" Radius¹