Gunsmithing Forum

A new South Bend 30 inch is about $20,000 plus tooling. Or a 40 inche is about $21,000.

South Bend Mill is about $18,000 tooled up from South Bend.

The cheapest combo from Grizzly is $1200. I think this is a hell of a value to learn on a new machine.

Just a 10 inch machine though. So limited in what you can do.

 
For starters projects get some cold rolled steel bar stock and either some drills and taps or a handful of large nuts of various sizes. Practice making more or less bolts and nuts while concentrating on making smooth cuts and threads and using your measuring tools. All you are really doing when you thread a barrel for a suppressor is making a bolt to fit a nut, it just needs to be a little more precise than the standard hardware store item.

I went to trade school, had never laid eyes on a metal lathe beforehand. Helped train other guys after I’d been making my living at it for a while. If you’re mechanical minded it will all come together and seem pretty simple, you’ll be accidentally doing trig to work things out without knowing you’re doing trig. If you’re not a mechanical person you may struggle with “seeing” the setup or operation and how it should be executed.

Solid advice I got from an old guy who was an amazing metal worker. “Figuring out the order of operations and building an erector set of blocks, wedges, clamps, and fixtures is the skilled part of the job, anybody can hit the “ON” switch and crank the handle” and “a huge difference between an apprentice and a master is the ability to disguise your mistakes and salvage the part”.

Have fun and be careful, you can get hurt really badly really quickly if you’re not paying attention. The same mentor that offered the above advice always held up both hands and wiggled his fingers when asked how he was doing, he’d smile and say “still got all ten”.
 
start with pvc pipe when learning internal threading.

Gordy Gritters is a great teacher of precision work should you choose to trade $ for learning curve.
 
Just went down this road about 5 months back. Found a really nice old Sheldon lathe and traveled about 5 hrs to pick it up. Got it all set up and leveled in the shop. I practiced lots and lots of barrel threading. Grabbed some aluminum stock at first and once I kinda got the basics down a bit I started messing with 416 stainless. Mostly old barrels I was able to grab from some kind people that had shot them out. I’ve only chambered one new barrel and I did it in 6 cm. Shoots great! It’s a big investment in tooling after you get a lathe so just be prepared. I build an outboard spider for doing barrel work. Next up is building some barrel extensions for doing work through the headstock on short barrels. Dialing in barrels is the challenge and then staying away from chatter! At least that’s been my biggest hurtles. It’s super fun and super time consuming. I’ve taken a break since spring bear started back in April.
 
Just went down this road about 5 months back. Found a really nice old Sheldon lathe and traveled about 5 hrs to pick it up. Got it all set up and leveled in the shop. I practiced lots and lots of barrel threading. Grabbed some aluminum stock at first and once I kinda got the basics down a bit I started messing with 416 stainless. Mostly old barrels I was able to grab from some kind people that had shot them out. I’ve only chambered one new barrel and I did it in 6 cm. Shoots great! It’s a big investment in tooling after you get a lathe so just be prepared. I build an outboard spider for doing barrel work. Next up is building some barrel extensions for doing work through the headstock on short barrels. Dialing in barrels is the challenge and then staying away from chatter! At least that’s been my biggest hurtles. It’s super fun and super time consuming. I’ve taken a break since spring bear started back in April.
Also I forgot to mention. I’m an auto mechanic by trade but had never turned on a lathe except a brake lathe before I bought mine. It’s very doable.
 
My old Lathe is too small through the head for anything but a barrel. it's usually not necessary to pull the barrel for a simple muzzle cut/recrown/ thread.
In order to dial in the bore, I built a spider pipe to run in the bearing support and use the 4 jaw to adjust the action end.

I don't know why I have so much barrel sticking out in the pic. I run about an inch for cut/crown or a little more for threads. too far out is asking for chatter.20250529_112620.jpg
 
That seems like a lot of places to build stress. You could drive on a bushing, turn od from the center and then grab it with the steady and go.
 
That seems like a lot of places to build stress. You could drive on a bushing, turn od from the center and then grab it with the steady and go.
not much pressure in any of it. I've checked alignment and all the things during and after, no issues.
 
I found a Standard Modern 1334 in beautiful shape, it comes with a good assortment of tooling and a few chucks. It has a vfd installed as well but I’ll need (want? Need?) to add a DRO sometime soon. First project once I learn the operations will be to build a rear spider for it.

Any recommendations on easy projects a guy can do to learn the operations of a machine?
That looks like a nice machine - it should be fun.

The dad in me has to mention safety.

Developing safe work habits includes having a system of checking for dangers every time before turning the lathe on. The chuck has to be clear of the tool post, the project, indicators, lights, etc. Get in the habit of double checking jaw tension and being on the lookout for situations where the work piece will tend to walk out of the chuck. Turn slower until you have some time under your belt. Faster speeds often give better surface finishes, but most things can be learned going slow. Unlike woodworking, metal lathes create surfaces and stringy chips that will easily cut skin. In general, don’t touch anything while it is spinning - a simple burr on a facing cut can be like a miniature meat slicer. Remove stringy chips with a pair of needle nose pliers or a coat hanger with a hook on the end. Remove sharp burrs on everything including scrap headed for the metal pile with a file or cutter.

Regularly oil everything, and protect the ways as much as possible.

Just leveling a machine can be more difficult than you’d think. In machining the phrase everything is rubber starts to come into play on day one. It takes a machinist level to get you close to what would be level front to back, side to side, but your bed will flex a measurable amount if it isn’t leveled correctly. Some machines are a little wonky from the factory and some trade offs in how it’s leveled have to be made.

There are probably all sorts of projects they had folks build in trade schools, and are probably selected for specific reasons that all tie together. In general I simply practice what I’ll need to do the next step in fitting the barrel. However, don’t thread toward a shoulder because crashing a cutter is not good. As others said, turn threads upside down in reverse if possible. Any cuts stopping at a shoulder are best to sneak up on without auto feed.

It’s not a reflection on your machine, but lathes new or old are not perfect and you’ll learn what it’s tolerances are with each type of cut. Simply cutting an accurate cylinder 12” to 18” long shows how far off your center is. Then backing off the center with machine turned off and sweeping that much stick out with an indicator shows if your headstock is in alignment with the bed in or out.

Facing a 6” to 8” plate held in the chuck, then sweeping the surface from side to side with an indicator will show how in alignment the cross slide is with the headstock and how well centered the cutter is up or down. Set the cutter accurately, but knowing about minor misalignment in the machine doesn’t mean you’ll have to fix it, or even be able to fix it.

Compared to steel, aluminum cuts easily and is great to practice on. Use sharp cutters and wd-40 for lubricant to keep the metal from sticking to the cutting edge. Unfortunately, my brain doesn’t get much enjoyment out of cutting aluminum, so I’ve never practiced on it or plastic, just steel. Mild steel cuts like crap and surface finish can be discouraging, so don’t let that get you down, your work will look better on leaded steel or grades with higher carbon content.

It’s a big fun hobby. You’ll think of dozens of projects around the shop.
 
If you have the space and you're really trying to make this more than a hobby, find a nice used machine with a 2.0" spindle bore.

Look through FB Marketplace and Craigslist, this is where I see the most inventory of used machines.

If you're really planning to chamber a barrel, don't waste time on a Mill/Lathe combo, they're trash. They're not big enough for the vast majority of the work you'll be doing. The milling portion of it sucks and you're severely limited on travel.

Most larger machines are going to be 3 phase, not a lot of homes have 3 phase power, so you'll have to run a phase converter. It's not the end of the world, but a phase converter is going to be an added expense.

I see decent lathes on FB Marketplace all the time for $3-8K. Deals can be had cheaper but you have to be ready to jump on them.

I really wouldn't waste time on the Bridgeport unless the price was right and you had the space. It doesn't have a lot of advantages for gunsmithing unless it has a CNC controller, even then, it's a bit outdated.
 
Looking down the road, between now and when your spiders are built, consider the pros and cons of options to get the barrel in the lathe straight. Today is the best time in history to find gunsmithing videos showing different methods. Prior to working on their first barrel, many folks thought the bores are straight, but to one extent or another they are banana shaped or a lazy corkscrew. No matter what happens at the muzzle, you want to get the chamber started as in alignment with the bore as possible. (You will eventually mark the muzzle so the banana is indexed pointing up when threaded onto the action and not right or left).

The least desirable for our purposes, least accurate way seen with guys who have less demanding clients is to put a gauge pin in both ends to indicate off of and ignore the banana shape all together. I’m not saying it’s good or bad, some successful old guys have done it this way a long time. If all you worked on was short range lever action rifles I would argue it’s all you need.

Then there are range rods that fit in the bore and are indicated off of. It does require a rod that fits close to the bore. It should have a little taper. These are available from many sources, but accuracy (runout) guarantees cost money. If you get one, spin it in some v blocks to measure any runout.
IMG_0742.jpeg

Then there are the long reach test indicators that reach in and read directly where the throat will be. You can sweep in and out to get an idea if the bore is aligned, or use range rods first, then use the indicator to fine tune the location of the throat. The best choice is often the most expensive and this would be a $500 Interapid. The other choice is a $300 Mitutoyo that is just as accurate on the tip, but the body is designed to fit in a prebored hole rather than an extra long pointer, which is more of a hassle and doesn’t work if you’re not preboring and single pointing to clean it up before using reamer.

IMG_0738.pngIMG_0739.jpeg
 
I found a Standard Modern 1334 in beautiful shape, it comes with a good assortment of tooling and a few chucks. It has a vfd installed as well but I’ll need (want? Need?) to add a DRO sometime soon. First project once I learn the operations will be to build a rear spider for it.

Any recommendations on easy projects a guy can do to learn the operations of a machine?
Look up joe pie (piesczinski) on youtube. He has some excellent content. His video on threading away from the chuck will save you a lot of sweat.
 
Hey thanks a bunch!! Iv been scouring the YouTube for tips and tricks, I will check his channel out :).
Here’s some good videos off my saved list - the video lists on all these channels are fun to look through. A lot of good videos have been taken down and content creators have faded away, but there are nuggets of interesting content.

He shows a lot of lathe work rebarreling.

Cool video of metal being machined under microscope.

Some interesting lathe milling, some weird stuff.

This channel has a lot of tool bit grinding, and high accuracy lathe work. A lot of stuff that doesn’t apply or is very long winded, but a working machinist with smallish lathes and some cool projects.

Click Spring does some amazing hand work. His channel is one of the best for precision hand filing and making amazing projects with hand work, lots of hand work.

Keith does a lot of machine repair, but some interesting projects.
https://youtu.be/OnNUNekYa_A?si=oiV0x_MP60NLXjV9

Robrenz has a really good set of videos on high precision external and internal lapping that are must see, but some other high precision projects not seen anywhere else.
https://youtu.be/0PzCie9pgPk?si=KenY1C_PopUmPeBS

Ox tool has some great tool making and machining videos not seen anywhere else. Hard for me to listen to, but this video blew my mind and his video list has some great projects.
https://youtu.be/9a_4ub3XKUg?si=hZFvd1kHxonI7tFG

Abomb79 loves manual lathe work and has really good work habits.
https://youtu.be/JHE925rxgvg?si=lvkIWE_LAzxCPtPF

Speedy has some good barrel stuff.
https://youtu.be/Gd6KhA4y9-I?si=ZFR02zOe2To1rM9R
 
It’s nice not to wait a couple years for a gunsmith to chamber a barrel. It’s also nice to roll up to the counter and buy a Tikka that shoots pretty good.
 
A new South Bend 30 inch is about $20,000 plus tooling. Or a 40 inche is about $21,000.

South Bend Mill is about $18,000 tooled up from South Bend.

The cheapest combo from Grizzly is $1200. I think this is a hell of a value to learn on a new machine.

Just a 10 inch machine though. So limited in what you can do.


I did not not know folks bought new lathes or mills.
 
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