pressbrake1
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Compound, the thread angle remains constant just width changes. We are talking fine tuningHow do you deal with the change of thread profile?
Compound, the thread angle remains constant just width changes. We are talking fine tuningHow do you deal with the change of thread profile?
the thread angle remains constant just width changes
We are talking a few thou adjustmentI disagree. The angle presented to the work piece reduces as the tip is rotated from the horizontal.
But then you seem to do it so must have a way of addressing this problem.
Here’s a picture of a lathe crossfeed screw I made . Note the tool bit is round so I can adjust to the helix and I just plunge cut using compound to give relief.
I only use carbide on nasty stuff. I discovered the shim problem internal threading heavy drilling tube. 8” bore the shim was fine but on 6” on the last 10thou it would pick up.
When that happens 3 in the morning on a break down job and the old brain is tired I nearly had a tantrum!View attachment 242829
For your tool you’d have to make one.So I've determined I need a 3deg shim for 2.5mm pitch on 16mm diameter but any suggestions where these can be purchased?
So I've determined I need a 3deg shim for 2.5mm pitch on 16mm diameter but any suggestions where these can be purchased?
I bought a Sau SEL 1616 toolholder, they list the shim as 16IR+3 but can't see anyone stocking them nor any 3deg from other manufacturers.if you had a tool from a major manufacturer then you’ll probably order a shim
Yes looks like that might be my best bet, I believe the toolholder came with a 1deg shim so something like 0.4mm packing should get me close to 3deg.I would just pack the base of the tool holder. Even a bit of welding rod under one edge might do it.