Tested in Working Machine; Fits the following: Schwinn 6510.1 6710.1 Trimline 3800.1 3800.2 3800.3 3800.4 3800.5 3820.1SR 3820.2SR 3820.3SR 3820.4SR 3830.1SR 3830.2SR 4000.1 4000.2 4100.1 4100.2 4600.1 4610.1 5600.1 5610.1 5620.1 5620.2 5630.1 6350.1 6500.1 7150 7150.1 7150.2 7150.3 7150.3SR 7150.4 7150.4SR 845.1 845.2Leeson