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I'm About to Chamber My First Barrel; Any Advice?

This Carmex insert is sold on ebay for a very good price. According to Carmex, this black insert is made for SS at slow speeds of 90 rpm, I am running 70-119. At 70 rpm, the threads are absolutely beautiful. I had been using the gold insert but they are 2.5x the money of the black insert due to sellers.

These carmex inserts are darn hard to dull, very high quality product at a very good price. I am sure that I bought enough for my grand children

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That should be sfpm ... ,surface feet per minute, not rpm...revolutions per min. 90sfpm @ 1" dia is ~340 rpm. 70 sfpm is ~270 rpm. Very easy mistake to make. Machine tool speed calculations are all made in sfpm. The rpm is dependent on the diameter of the part.

Most use the wrong tooling when threading, especially if they have been convinced to sharpen their own tooling. A V shaped tool is made to cut all the way down to ~72 threads per inch. That fragile point gets buggered and your threads will go to hell fast. Using full profile or even thread specific V tooling will improve most threads we see posted here.

Bully, the front side of the threads like you posted are the least important side, It's the back side that should have a good finish. Same as looking into the end of an action and thinking it has great threads. Looking at the back side of the threads, is the important side. The thread side most admire is just clearance.
 
TRA, I gave him instructions that a novice can understand, which would be the settings on the lathe. You are talking greek to him.
 
TRA, I gave him instructions that a novice can understand, which would be the settings on the lathe. You are talking greek to him.
I did not mean to, as my Greek sucks. I think there are certain details that are necessary to at least do satisfactory work when threading. Using the right tooling as you are doing, has a large effect on the outcome. You cannot make good threads with the wrong or crappy tooling. You have found that out. On the photo Bully posted, his threads are totally affected buy his tooling. With the right tool his work would be as good as most others are doing.

I have faith in him. I'll bet he understands my Greek better than I do.
 
This Carmex insert is sold on ebay for a very good price. According to Carmex, this black insert is made for SS at slow speeds of 90 rpm, I am running 70-119. At 70 rpm, the threads are absolutely beautiful. I had been using the gold insert but they are 2.5x the money of the black insert due to sellers.

These carmex inserts are darn hard to dull, very high quality product at a very good price. I am sure that I bought enough for my grand children

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Thanks for that info Ackleyman. I’ll look into these inserts.
 
Hoz,

Here is another version of threading at higher speed. This was accomplished using the Zero location in the DRO and have a software interface to stop the spindle thru the VFD once carriage travel count gets to zero. The video was done during testing. Threading into a relief cut to within 0.001 is no problem.

I have since settled on the proximity sensor.

Watch "10x24 Lathe Threading with DRO Driven Spindle Stop" on YouTube
Thanks for the info on this Bamban—. I will look into this more.
 
Why is the buttstock of those 40x stocks cut off at such an angle?
Open sights , hi power , 3 position . The later 700 based stocks had a different profile .
The pitch , while widely used in shotgunning can alter your sling shooting a lot .
Hope that makes sense .
 
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Open sights , hi power , 3 position . The later 700 based stocks had a different profile .
The pitch , while widely used in shotgunning can alter your sling shooting a lot .
Hope that makes sense .
yes it does sort if—should i cut them strait for bench shooting?
 
Interesting stock...
How do you rate the ergonomics?
Got me thinking about picking one up to use as a pattern to cut one from laminate on my duplicator...
 
Interesting stock...
How do you rate the ergonomics?
Got me thinking about picking one up to use as a pattern to cut one from laminate on my duplicator...
I love this stock for what it is. I’d like it to be a bit more adjustable but it works well enough.
 

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