MachTach gear tooth sensor mount for 9" South Bend lathe

This allows the MachTach gear tooth sensor to be mounted behind the head stock so that the sensor can run against the 76 tooth bull gear. You might need to upgrade an older unit by buying a new microprocessor chip from Henry.
The slot in the back of the base is for a 1/4-20 nut. the hole in the bottom of the base will take a 1-1/2" 1/4-20 bolt which is used to clamp the base to the V-way using the shoe. Clean out the hole with a 1/4" drill bit. Run a 1/4-20 tap through the hole in the top of t