A Pratt & Whitney jig borer being set to machine a precision jig for use in production operations. Note the set of Pratt & Whitney-manufactured gage blocks resting on the machine's table.
Using a Hendey Tool & Gage Makers' Lathe to manufacture a precision thread gage for use in the machine shop
Checking the dimensions of the thread gage
Cutting an internal thread on a 9-inch Tool & Gage Makers' 9-inch Lathe
Relieving a hob with spiral flutes using the sub-headstock to obtain the necessary slow speeds