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Precision Brass Flywheels

Among the most critical components when repowering your locomotives are quality flywheels. As a general rule of thumb, use the largest flywheel(s) that you can fit into your repowering project. A-LINE flywheels are custom precision machined to our specifications from quality brass stock. Concentricity is held to within one-thousandth of an inch (.001") for smooth, quiet operation. A-LINE flywheels are drilled and reamed to allow a slip fit onto motor shafts for easier positioning during installation or removal. Slip fit flywheels should be set with A-LINE flywheel cement #20010 and are superior to their press fit counter-parts because there is no chance of damaging the motor during mounting. Each flywheel includes Athearn coupling or no coupling if it is a Hex drive flywheel and mounting instructions. Each package contains 2 flywheels.


Item # A (Small End) B - Diameter C - Length Shaft
20004 ball cpl -- 1" 1/2" 3.0 mm
20005 Hex -- 5/8" 15/32" 2.0 mm
20006 ball cpl -- 21/32" 11/16" 2.0 mm
20013 ball cpl 5/8" 11/16" 3/8" 2.4 mm
20021 ball cpl 5/8" 11/16" 3/8" 2.0 mm

 Ball Couplings (ball cpl) Go to:

See Our Other Repowering Parts