- Joined
- Oct 4, 2020
- Messages
- 484
New PM1440GT - My first real lathe. My metal working education is 5 years of Abom79 and This Old Tony, and a week long precision rifle course in Gordy Gritters shop.
I am using the following carbide insert https://www.mscdirect.com/product/details/05765631?rItem=05765631 (Recommended by Gordy) and am practicing to thread barrels. I am using (allegedly) 416 stainless bar I got on ebay.
I am confident that my tool height is correct.
Cut is flooded with dark cutting oil.
Speed is slow, 100rpm-ish
Compound @ 29.5
Cuts are shallow, 5 thou max, last cuts 1-2
All passes are done by advancing the compound, except for the last pass, I push the crossslide in a though.
I did lick the top of these threads with a file because they were sharp as a cats claw.
Because I am new at this I don't know what I don't know and am open to questions, feedback, etc etc. Let me have it.
I am using the following carbide insert https://www.mscdirect.com/product/details/05765631?rItem=05765631 (Recommended by Gordy) and am practicing to thread barrels. I am using (allegedly) 416 stainless bar I got on ebay.
I am confident that my tool height is correct.
Cut is flooded with dark cutting oil.
Speed is slow, 100rpm-ish
Compound @ 29.5
Cuts are shallow, 5 thou max, last cuts 1-2
All passes are done by advancing the compound, except for the last pass, I push the crossslide in a though.
I did lick the top of these threads with a file because they were sharp as a cats claw.
Because I am new at this I don't know what I don't know and am open to questions, feedback, etc etc. Let me have it.