- Joined
- Jan 6, 2017
- Messages
- 1,214
I wanted one of these, but inch sized. All on the market seem to be metric. Some may remember, I posted in the tool subforum a couple weeks ago trying to find a place to find an inch version. No such luck.
I made this today out of an old Bartlein 416r 6.5mm barrel stump, with a piece of hardened 0-1 tool steel pressed in for the probe. I drilled, reamed and pressed in the piece of 0-1 first, the turned each part in a single setup.
The probe is .2" diameter, the shank is 1/2". The hardest part was figuring out an order of operations to make each part in a single setup, so as not to impart any runout from the chuck.
I had to try several springs. Repeatability sucked, at about plus or minus .005" until I used a really stiff spring. The stiff spring really worked.
I tested it by touching off of my vise's fixed jaw, and zeroing the DRO. Then i touched off of the vise a half dozen times.
After I put the heaviest spring I could find in the toolbox in it, I got zeros across the board, six out of six. So, I think it's gonna work.
Oh, and while I was working, my shop partner raided the cat food again. He better work on his poker-face because he won't be getting away with anything with this one..
When I see this look, I may as well go look around to figure out what he did.
I made this today out of an old Bartlein 416r 6.5mm barrel stump, with a piece of hardened 0-1 tool steel pressed in for the probe. I drilled, reamed and pressed in the piece of 0-1 first, the turned each part in a single setup.
The probe is .2" diameter, the shank is 1/2". The hardest part was figuring out an order of operations to make each part in a single setup, so as not to impart any runout from the chuck.
I had to try several springs. Repeatability sucked, at about plus or minus .005" until I used a really stiff spring. The stiff spring really worked.
I tested it by touching off of my vise's fixed jaw, and zeroing the DRO. Then i touched off of the vise a half dozen times.
After I put the heaviest spring I could find in the toolbox in it, I got zeros across the board, six out of six. So, I think it's gonna work.
Oh, and while I was working, my shop partner raided the cat food again. He better work on his poker-face because he won't be getting away with anything with this one..
When I see this look, I may as well go look around to figure out what he did.
Last edited:
