AAR Interchange Rule 21

Group J – High Capacity 3-1/4 Inch Travel

Models in blue are acceptable for reconditioning/purchase.
Removed What Can Be Applied Remarks
Group J Group J
Group M
None

Qualifier Group J Name and Type AAR Spec Gear Length (inches) Pocket Length (inches)
01Cardwell Westinghouse Mark R500M901E22 3/824 5/8
04National NC-440M901E24 5/824 5/8
05Dresser Ind. Waugh Type 650M901E24 5/824 5/8
06Dresser Ind. Waugh Type 650-1M901E24 5/824 5/8
08National NC-660M901E22 3/824 5/8
10Cardwell Westinghouse Type Mark 50M901E22 3/824 5/8
11*National NC-550M901E22 3/824 5/8
12National NC440-1M901E24 5/824 5/8
13Miner SL-76M901E22 3/824 5/8
14Miner TF-880M901E22 3/824 5/8
15Miner SF-79M901E22 3/824 5/8
16Miner SF-81M901E22 3/824 5/8
17National NC-660AM901E22 3/824 5/8
18Miner Crown SEM901E22 3/824 5/8
19Cardwell Westinghouse Mark 325M901E22 3/824 5/8
20Keystone XK-25M901E22 3/824 5/8

* No longer in production.

Miner and its referenced products are federally registered trade marks of Miner Enterprises, Inc.
Cardwell Westinghouse and its referenced products are federally registered trade marks of Wabtec Corporation.
Keystone and its referenced product are federally registered trade mark of ASF-Keystone, Inc.
© 2007 A. Stucki Company. All Rights Reserved.