GTA

All Springer/NP/PCP Air Gun Discussion General => Machine Shop Talk & AG Parts Machining => Show Off Your Air Guns With Mods (SHOW and TELL) => Topic started by: Privateer on June 27, 2018, 06:22:44 PM

Title: .32 cal MRod work
Post by: Privateer on June 27, 2018, 06:22:44 PM
Thanks to Lloyd-ss and Rocker1 I'm doing my first custom one off build.
Now Lloyd sent me a hulk of a .32 barrel! I'm talking you could beat Superman to death with this thing!
Rocker1? Well he sold me a really nice lathe with some cool stuff to go with it!
1st thing I needed to do was take some metal off the barrel. Some metal don't even come close to what has to go!
That would be like saying I need to remove some stuff to make a BattleShip into a row boat!
I did take a few pics that I'll up load later but I have an old friend coming over to give me some advice on what to do as I'm out of practice with lathes.
Title: Re: .32 cal MRod work
Post by: Privateer on June 27, 2018, 08:33:45 PM
Need to take a few parts for the lathe in to town and get some stuff.
Barrel wobbles a bit as is so need to correct for that.
Not that I'm worried about what it looks like. I want it heavy and have no plans to try to quite it down.
I actually want it kind of ugly.
 ;D
Title: Re: .32 cal MRod work
Post by: Wayne52 on June 28, 2018, 05:37:32 AM
Jeff I'm sure that when you're done with this gun it'll be way cool, can't wait to see the finished product 8)
Title: Re: .32 cal MRod work
Post by: Privateer on June 28, 2018, 04:46:41 PM
You can see what the breech end looked like to start.
(https://www.gatewaytoairguns.org/GTA/MGalleryItem.php?id=5979)
(https://www.gatewaytoairguns.org/GTA/MGalleryItem.php?id=5978)

And what I'm still cutting it down to.
(https://www.gatewaytoairguns.org/GTA/MGalleryItem.php?id=5980)

I need to get a consistent diameter so it passes through the lathe for further work.
Down fall of a small lathe I guess. Rocker is lucky he suckered me into this lathe before he shoots me!
 ;D
Title: Re: .32 cal MRod work
Post by: shorty on June 28, 2018, 05:23:18 PM
Same Lathe I have. I did a .357 barrel just like this. It took so long (couple nights) to get it to .505". Told myself I will never do that again. Good luck and can't wait to see the results.
Title: Re: .32 cal MRod work
Post by: Rob M on June 28, 2018, 05:25:47 PM
Same Lathe I have. I did a .357 barrel just like this. It took so long (couple nights) to get it to .505". Told myself I will never do that again. Good luck and can't wait to see the results.

I did the same thing on the same lathe with a springfield .303 barrel , took about 6 hrs all in one shot.. my only advice is to use a carbide insert tool to not have to fight the heat and tool wear.
Title: Re: .32 cal MRod work
Post by: Privateer on June 28, 2018, 05:31:10 PM
Yep. Carbide inserts. Found a butt load at an old shop I demoed so they were free.
 :D
Title: Re: .32 cal MRod work
Post by: Wayne52 on June 28, 2018, 05:34:47 PM
Looking good there Jeff, it's nice to see some pics, is that one of those Harbor Freight lathes ?
Title: Re: .32 cal MRod work
Post by: Privateer on June 28, 2018, 05:38:55 PM
Looking good there Jeff, it's nice to see some pics, is that one of those Harbor Freight lathes ?
Yes. Rocker1's old lathe. He did a lot of upgrades on it and suckered me into buying it.
 ;D
With all the stuff he threw in? I got a heck of a deal and he didn't shoot me!
Title: Re: .32 cal MRod work
Post by: Wayne52 on June 28, 2018, 05:41:58 PM
I've thought about buying one of those but I never expected to ever turn the OD on a barrel with it, just make smaller stuff with it is all, I'm sure it'd be a lot of fun to tinker with.
Title: Re: .32 cal MRod work
Post by: Privateer on June 28, 2018, 05:46:53 PM
I've been making small parts with it for awhile now.
This is the first large barrel project I've attempted.
I could have ordered a blank and saved a lot of the work but with the trade to Lloyd?
Good time to play.
Title: Re: .32 cal MRod work
Post by: Rob M on June 28, 2018, 05:51:02 PM
I've been making small parts with it for awhile now.
This is the first large barrel project I've attempted.
I could have ordered a blank and saved a lot of the work but with the trade to Lloyd?
Good time to play.


I think the spindle bore is 20mm , so once you get below .787 , you should be good to go working the barrel in the spindle which will be far more rigid and allow for more depth of cut
Title: Re: .32 cal MRod work
Post by: Rob M on June 28, 2018, 05:51:37 PM
I take that back , I think the chuck bore is smaller than that , I don't have this lathe model anymore so im not sure..
Title: Re: .32 cal MRod work
Post by: shorty on June 28, 2018, 05:54:33 PM
5/8
Title: Re: .32 cal MRod work
Post by: Rob M on June 28, 2018, 06:03:02 PM
5/8

yep was just looking it up
Title: Re: .32 cal MRod work
Post by: YEMX on June 28, 2018, 06:33:45 PM
This project sounds awesome!!

That's the same kind of lathe I'm putting together!  ;D
Title: Re: .32 cal MRod work
Post by: Privateer on June 28, 2018, 10:58:40 PM
The fun part was planning cuts to fit the lathe.
This much barrel turned down, flip it around then do some more.
Then flip it around again a few more times!
 ;D
All this just to get it on a somewhat close diameter.
The diameter I have it at so far will pass through the lathe for future work.
That involves cutting the breech area to length and turning it down.
I also want to get it close to the outside diameter of the MRod shroud.
Title: Re: .32 cal MRod work
Post by: lloyd-ss on June 29, 2018, 09:48:58 AM
Doing good there Jeff! 8)  I see you put some ball bearings on that steady rest. Great idea that I will have to borrow from you! ;)
Lloyd
Title: Re: .32 cal MRod work
Post by: Privateer on June 29, 2018, 12:17:46 PM
Doing good there Jeff! 8)  I see you put some ball bearings on that steady rest. Great idea that I will have to borrow from you! ;)
Lloyd
That steady rest came with the lathe Rocker1 sold me.
Think I'm gonna need another like it but for smaller diameter work. This one handles 1" - 2". Next step down is the one that handles 0" - 1". Littlemachineshop has them.
Title: Re: .32 cal MRod work
Post by: HunterWhite on June 29, 2018, 12:26:01 PM
Are you cutting the whole thing down, or just where it fits into the receiver?
Title: Re: .32 cal MRod work
Post by: Privateer on June 29, 2018, 12:38:20 PM
The whole length is getting turned down.
Title: Re: .32 cal MRod work
Post by: Horatio on June 29, 2018, 03:15:09 PM
I forgot, what is the land/groove diameter and what are you shooting out of it?

Really interesting thread. Always admired you guys that had machinists patience.
Title: Re: .32 cal MRod work
Post by: Privateer on June 29, 2018, 03:55:16 PM
I'd have to check about that info. It's a .32 so I plan bullets.
Title: Re: .32 cal MRod work
Post by: bear air on March 14, 2022, 08:47:44 AM
Stumbled onto this section this morning and being a Mrod freak I had to ask whatever became of this project. I was looking forward to seeing the finished gun.
Title: Re: .32 cal MRod work
Post by: shorty on March 18, 2022, 01:09:53 PM
Never happened. It would have been good but I bought a 30 cal for the price this would have cost.