Axles

Axles.

A railcar shall not be placed in or continue in service if:

An axle has a crack or is broken.

An axle has a gouge in the surface that is between the wheel seats or more than 1/8

inch in depth.

A journal shows evidence of a fused bearing or overheating, as evidenced by a

pronounced blue-black discoloration.

The surface of the plain bearing journal on the axle, or the fillet on the axle, has a

ridge, a depression, a circumferential score, a corrugation, a scratch, a continuous

streak, broken collar, seaminess (ridge around the axle), rough inside end collar, or

cuts pitting, rust, evidence of welding, or etching.

Wear limits have been exceeded. See Tables A-1 through A-3 for wear limits.

Plain axle journal wear limits.

Figure A-16. Plain axle journal.

Table 5-1. Plain axle journal wear limits.

REJECT WHEN REACHED

Journal Size

Journal

Standard

Collar

Length

Diameter

4 x 8"

3/16"

8 11/16"

5x9

3/16"

8 11/16"

5 x 10"

3/16"

8 11/16"

6 x 11"

3/16"

8 11/16"

6 x 12"

3/16"

8 11/16"

7 x 12"

3/16"

8 11/16"

A - 17