- Joined
- Feb 2, 2017
- Messages
- 1,234
I need suggestions on how to use a die to cut perpendicular threads.
I'm making a stud for my size E Multifix tool post. I had a choice between 1/2"-13 and M20-1.5 threads into the t-nut because those were the biggest tap/die pairs I had. I chose M20-1.5 as that was the closest to what Adam Booth used when he made a stud for a customer's size E Multifix. Selecting the M20-1.5 means single point threading of the stud is out as I only have imperial threads on my Logan.
My first attempt ended up being off by at least a degree--not good when I want a nice precise seating against the t-nut. My second attempt I turned a shoulder equal to the root diameter. I pressed the tailstock chuck against the die and started tapping. After about 3 threads, it appears better, but it is still not perfectly perpendicular.
I have plenty of length on which to experiment, but I'd like to get this done so I can mount the tool post.
What's the best way to proceed? As a contingency I popped a 3/4-16 tap and die into my Drills and Cutter order, which gives me the option of single-point threading, but that will require me re-making the t-nut.
I'm making a stud for my size E Multifix tool post. I had a choice between 1/2"-13 and M20-1.5 threads into the t-nut because those were the biggest tap/die pairs I had. I chose M20-1.5 as that was the closest to what Adam Booth used when he made a stud for a customer's size E Multifix. Selecting the M20-1.5 means single point threading of the stud is out as I only have imperial threads on my Logan.
My first attempt ended up being off by at least a degree--not good when I want a nice precise seating against the t-nut. My second attempt I turned a shoulder equal to the root diameter. I pressed the tailstock chuck against the die and started tapping. After about 3 threads, it appears better, but it is still not perfectly perpendicular.
I have plenty of length on which to experiment, but I'd like to get this done so I can mount the tool post.
What's the best way to proceed? As a contingency I popped a 3/4-16 tap and die into my Drills and Cutter order, which gives me the option of single-point threading, but that will require me re-making the t-nut.