Change Gears (18DP, 3/8 wide, 9/16 bore with 1/8 x 1/16 keyway*):

(1) PT32K16NK1 CHANGE GEAR, 16T
(1) PT32K24NK1 CHANGE GEAR, 24T
(2) PT32K32NK1 CHANGE GEAR, 32T
(1) PT32K36NK1 CHANGE GEAR, 36T
(1) PT32K40NK1 CHANGE GEAR, 40T
(1) PT32K44NK1 CHANGE GEAR, 44T
(1) PT32K46NK1 CHANGE GEAR, 46T
(1) PT32K48NK1 CHANGE GEAR, 48T
(1) PT32K52NK1 CHANGE GEAR, 52T
(1) PT32K54NK1 CHANGE GEAR, 54T
(1) PT32K56NK1 CHANGE GEAR, 56T
(1) PT32K60NK1 CHANGE GEAR, 60T
(1) PT32K80NK1 CHANGE GEAR, 80T

Idler gear (18DP, 3/8 face width, 5/8 bore, 13/16 hub width):

(1) PT33NK1 IDLER GEAR, 80T

Compound Gears (18DP, 3/8 face width, 5/8 bore, 13/16 hub width):

(1) AS336NK1 COMPOUND GEAR, 18/54T
(1) AS36NK1 COMPOUND GEAR, 18/72T

*Note that due to the small dia. of the 16-tooth gear, it has a shallow keyseat -- something like .042, as opposed to the normal .062:

For this reason, the keyseat on the reverse shaft is cut correspondingly deeper:

Here is a model C gear chart:

Paula Stephens