QUARTER-TO-HALF GAUGE FULL
I picked up a Machinists’ Plug Gauge Set, in .250”-.500”, for scrap value due to its age. The uses are endless for the engine builder. Here are a few of mine: 1.) I use these as checking standards, or for set- ting a micrometer. 2.) They are a quick go-no-go method of gauging a precision hole, particularly valve guides. 3.) If its a real old set, they can be sacrificed for fabricating odd sized dowel pins. 4.) I use them to remove a hollow/split dowel pin without damage. Find one the is a tight fit inside the dowel pin, then it can be removed with a collet type dowel puller.

Scott Ouellette
Powerplay Automotive Machine
Wilmington, MA
October, 2017