MTFCA Forum

Nobody has a lathe, or at least one big enough to hold a timer they can rent me for just long enough to reface a worn timer.
I don't think I succeeded with this setup, merely moved the problem from one area to another.

How would you hold the spinning stone still in the wooden board? Maybe I need to bush it? But it's tight in the wood, bit not tight enough....

Something like this may work.
http://www.mtfca.com/discus/messages/25 ... 1329235149

Hey there Kep! Do you have a drill press? At the moment, I can't get a picture to post. However, I use a standard medium size grindstone made for hand drills in my drill press (two inch or less). I carefully made a simple jig to hold the timer in and enable me to rotate the timer by hand. The jig holds the timer straight and steady. I use a single bolt to hold the jig onto the drill press table in such a way that it can pivot on the bolt for depth adjustment for the grindstone onto the roller path of the timer. My jig is similar to what J Walters has shown, except that mine holds the timer up the other way with the drill press holding the grindstone down.
You want the grindstone to turn rather fast, they cut better and smoother that way. However, be aware that some grindstones (all of them actually) do have a maximum rpm speed, otherwise, they can explode from centrifugal force (not fun to be around!). My stone, and my drill press, I run at its highest speed. Take shallow cuts, work the high spots down slowly.
It does a very nice job on timers. However, and very important, be VERY careful with this method! The grindstone does try to rotate the timer too fast, and the stone and timer do want to suck your fingers in where you do NOT want them! One forum member getting sucked into a grinder (tractor wheel) this year is enough!

Good Lord Jason you found my pic of a timer refacer I cobbled up using a dremel tool. It worked pretty good too but I admit the timer wasn't really shot either.