Not sure there is a program for it but this website covers how to calculate it https://www.frfrogspad.com/intballi.htm

I finished the suppressor design, since this is going to be used with mostly supers from 5.56/30cal/6.5creed a 60 degree cone seemed like the best option. the baffles are .08 thick the first 2 blast baffles are 17-4 and the rest of the baffles will be gr5 ti, all baffles will be reamed .375". I...

I’ve been working on a couple attempts and re-designs of the brake but I finally have it finalized. It took a while to get used to threading on the g0602. But I’m about to start on the tube and previously I was going to thread it 1 3/8-24 or 28 tpi but I’m not sure if my 1.36” id x 1.5 od tube has e...

So i messed up the threads a little on the brake but i had to beef up the design to accommodate a larger 5/8 tapped hole. It was fine for 1/2-28 but for 5/8-24 there wasn't enough material at the thread relief with a 7/8 - 12tpi so I beefed up the design going to a 15/16 - 16tpi with 5-6 threads for...

My carbide threading tool doesn’t fit and hss does t cut well on 17-4. Guess I’ll have to find another tool

Ok, thanks fisherman wanted to verify. I put some work into the break last night, completing everything besides the OD threads and the brake port holes (changed to 10° included taper). I've only threaded once on a lathe and it didn't go super well (4140). So I am a little overwhelmed and i'm pretty ...

I was thinking about the suppressor design. So far i haven’t designed any internals yet. I know I’m going to do some version of a 60° baffle(17-4 & Gr5 Ti) but I’m not sure what to do for the blast spacer. I’ve heard the spacer takes the most of the initial blast with brake mounted suppressors. ...

Tough to tell what depth your groove is already, but either the threading tool or the neutral tool should fit in there. Still, there is a lot of stick out from the chuck without tailstock support. The grove isn’t that deep, but I’m out of town until tomorrow. When I get back I’ll put in the live ce...

Flipping the tool would allow you to get it on center without needing to hang the tool post holder off the edge of the compound. I'm not exactly sure what you can do to get past the layer. If it happened to me, I'd slow the lathe down and with a new tool tip, give her hell. Can you get any of your ...

I didn't think about it until now, but you could have flipped the tool upside down and reversed the lathe. What difference does flipping the tool make to cutting? Sounds like you work hardened the SS with the HSS parting tool. Gonna need to break through that layer of hardness. Might bring in your ...

Move your tool post over so the holder can drop down past the compound. The only way that works is if i have the cross slide set 90 degrees (perpendicular to spindle axis). The cross feed and compound feed handles get in the way of each other. Do not know what i can do. 3 is great if you can mainta...

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I had the same issue with my AXA tool post and the parting tool. I already removed some material from the bottom of the holders, but it wasn't enough. I ended up milling some off of the bottom of the tool as well. If you have a 4 jaw chuck, turning down the holder on the lathe is a piece of cake. Y...

What inserts do u buy for threading that have a radius and not a sharp v? There are pitch specific inserts for both external (NTCR24E, for example, is for cutting 24 pitch right hand external threads) and internal (16IR24 would be a 24 pitch laydown insert). I don't generally bother with pitch spec...

I was looking around the lathe and i found this carbide parting tool. It is a different style than yours but there can't be too big of a difference? Same style, but that's a holder for MGMN200, which are 2mm wide. 200s are a little light, and the -2 holders don't have as much reach for parting larg...

MGMN inserts in MGEHR holders are your friend for parting tough alloys like 17-4. You'll still need to be mindful of temperature, though, using lots of cutting fluid/coolant, and making offset plunges for really deep parting. I use MGMN300 inserts for most 17-4 work up to 2" OD. ACME threads a...

I was looking around the lathe and i found this carbide parting tool. It is a different style than yours but there can't be too big of a difference?

I forgot to change the change gears back to turning as they were setup for threading, but i got that fixed and the 17-4 turns beautifully now. One problem i'm having is my hss parting tool is not cutting the 17-4 and i've tried lowering and raising it and still ain't cutting at all. The only reason...

I checked my compound and 0° is parrel so basically you subtract half the included angle from 90°to get compound angle? On most compound scales, yes, since they'd read 90° when travelling parallel to Z axis. But if your compound travels on Z axis when the scale is set to 0°, then you'll set it at 6...

Included means the combined angle of both sides of a taper; 6° per side, 12° included. What that means on your lathe compound depends on how your compound scale reads, since not all lathes are the same. If I were to set any of my lathe compounds at 20°, I would cut a very obtuse 140° taper, basical...

I've been spending some time on fusion 360 designing and modelling and this is what i came up with for the quick detach brake. I used 7/8 - 12tpi (class 2 or 3?) for the brake with 78 degree shoulder.

Alright you convinced me to go with 1.375 24tpi, i have a belt sander ill try to use but not sure on how much to take off the v of the carbide insert Not very much. Think dremel. This calculator will tell you how much truncation & radius if you plug in the pitch & thread class. http://theor...

Why 24tpi instead of 28tpi i want the tube to be thicker. I use carbide inserts for threading but they are a sharp v. Inserts are cheap; grind the tips to make a 24 pitch depth & radius. I usually try to match the single thread depth to the remaining wall thickness at root/undercut. So: For .03...

I have found SD Tactical's tubes and they are using the exact same tube ( Gr9 Ti 1.5"OD 1.36" ID) and they are threading it 7/16 -20 so 7/16 -28 should work with it being a shallower thread but i would rather do the custom thread that way i don't have to bore it and remove material weaken...

I have found SD Tactical's tubes and they are using the exact same tube ( Gr9 Ti 1.5"OD 1.36" ID) and they are threading it 7/16 -20 so 7/16 -28 should work with it being a shallower thread but i would rather do the custom thread that way i don't have to bore it and remove material weakeni...