South Bend Lathe Threading Gears (Metric additions)

This is a partial set of Metric threading gears. These gears can be used in conjunction with a standard set of threading gears (https://www.thingiverse.com/thing:3172973) to do metric threading. Alternatively, they can be combined with a partial set of standard threading gears (https://www.thingiverse.com/thing:3219391) which provide only the gears reused from the standard set.

These are all designed to the specs. for South Bend 9A, 9B, or 9C lathes. (14.5 PA; 18 DP; 3/8" thick; 1/8" key;