Class K AP-2™ Bearing End Cap Designs

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AP-2™ is a trademark of The Timken Company.

Timken® is a registered trademark of The Timken Company.

© 2009 The Timken CompanyPrinted in U.S.A.0.1 1-09-00 Order No. 8193

For additional information, contact your Timken sales representative at 1-800-964-2626 or visit www.timken.com/rail.

6 ½ x 12 (N)

The 6 ½ x 9 and 6 ½ x 12 Special adapters are interchangeable with each other and can be used on all sizes of AP-2 bearings.

The 6 ½ x 12 (N) can only be used on the standard Class F - AP bearing.

Adapters

6 ½ x 12 Special6 ½ x 9

“Deep” End CapPrototype end cap design

marked AP-2, 6 ½ x 12.

Prototype Class K Timken® AP-2™ Bearing DesignPrototype design with “long” journal and “deep” end

cap. 105 carsets built for Norfolk Southern.

Current Standard Class K Timken AP-2, 6 ½ x 9 Bearing Design

A.A.R. Class K AP-2 Bearing Design.Traditional End CapOld Class K end cap, marked

AP-2, 6 ½ x 9.

Alternative End CapIntermediate end cap design marked AP-2, 6 ½ x 12. At bearing reconditioning, these

end caps are being revised to 6 ½ x 9.

WARNING Failure to observe the following warnings could create a risk of serious injury.

Not matching the bearings and adapters as described will lead to bearing damage and less than desired wheelset performance.

Proper bearing maintenance and handling practices are critical. Failure to follow installation instructions and to maintain proper lubrication can result in equipment

failure, creating a risk of serious bodily harm.

New End CapStandard Class K end cap

marked AP-2, 6 ½ x 9.

The journal bearing without the end cap is the same regardless of end cap design.