$20 Tool Post Grinder

[Welcome to the Machine]

I made this mini tool post grinder from a Harbor Freight micro pencil grinder and some scrap aluminum.

[DIYer]

Thanks Welcome to the Machine! We've added your Tool Post Grinder to our Machining category,
as well as to your builder page: Welcome to the Machine's Homemade Tools. Your receipt:

Tool Post Grinder by Welcome to the Machine

tags: grinder, tool post

[Moldyjim]

Pretty typical of the runout on those pencil grinders, the collets aren't very precision.
A careful whack and a diamond truing of the wheel will help out a lot to get a good finish.

I've done similar grinding by just putting the grinder in the toolpost directly. and carefully tightening the setscrews down on the grinder body.
Not precision grinding just a gotta get it done job.

[Skun Knuckles]

Good job.
I use the same type of grinder in a boring bar holder, sleeved to suit the diameter of the body, for sharpening end mills in the lathe.