M31C build and source for material

1941 - 1945, MB, GPW Technical questions and discussions, regarding anything related to the WWII jeep.
Post Reply
bryanbdp
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 475
Joined: Sun Jan 19, 2020 1:17 pm
Location: W Simsbury CT

M31C build and source for material

Post by bryanbdp » Tue Feb 02, 2021 8:02 pm

I've been building my M31C mount for a while now using prints from Jeep Draw.
A local welding shop had the T angle. It is a tad rusty and lightly pitted but very solid. He gets $50 for 8ft cut into 3 pcs for shipping. Plus shipping cost. It measures just a hair under 2" wide, maybe 1-15/16. It's also 2" overall on the 3rd leg. 1/4" thick. I milled mine down to 1.5" East Side Welding 860-223-2247. I thought this was a great price!
20210202_234716.jpg
T stock
45 MB - W Simsbury CT
Built to drive!


bryanbdp
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 475
Joined: Sun Jan 19, 2020 1:17 pm
Location: W Simsbury CT

Re: M31C build and source for material

Post by bryanbdp » Tue Feb 02, 2021 8:13 pm

20210202_234540.jpg
Milling T to size, thank God for power feed!
20210202_234625.jpg
Using CNC mill to machine flat at 30 degrees for screw boss

20210202_235142.jpg
Turning OD

20210203_000657.jpg
Semi finished
45 MB - W Simsbury CT
Built to drive!

donk_316
G-Major
G-Major
Posts: 941
Joined: Sat Sep 03, 2011 5:47 pm
Location: Edm, Canada

Re: M31C build and source for material

Post by donk_316 » Tue Feb 02, 2021 9:03 pm

Are you in Europe? That steel price is bonkers high...

If this turns out well, would you consider selling a couple copies of the lathe turned piece?
GPW 112092 04-30-43 USA 20372531 (orig)

bryanbdp
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 475
Joined: Sun Jan 19, 2020 1:17 pm
Location: W Simsbury CT

Re: M31C build and source for material

Post by bryanbdp » Tue Feb 02, 2021 9:09 pm

You can get them on Ebay. Way too much work on a manual lathe to make any money! I did it for the challenge as much as to save money.

I didn't think the steel price was bad, it's 1/4" stock, pretty heavy stuff, and not easy to find. I'm in CT USA. McMaster gets $120 for 6 ft...

Midwest steel and aluminum is where I ordered the main pipe and other bits, their pricing is pretty good.
45 MB - W Simsbury CT
Built to drive!

bryanbdp
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 475
Joined: Sun Jan 19, 2020 1:17 pm
Location: W Simsbury CT

Re: M31C build and source for material

Post by bryanbdp » Thu Feb 04, 2021 7:33 am

20210204_111537.jpg
Finished socket. 1st time threading on lathe!

20210204_111625.jpg
Gussets and legs
45 MB - W Simsbury CT
Built to drive!

User avatar
berlinbaby
banned
Posts: 5
Joined: Fri Jan 29, 2021 5:15 am
Location: Rock Hill, SC

Re: M31C build and source for material

Post by berlinbaby » Thu Feb 04, 2021 9:14 am

Anyone who thinks steel prices are high hasn't purchase steel lately. It's a new world out there.

Al Rains
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 346
Joined: Wed Aug 13, 2008 2:53 pm
Location: Pine Level, N C
Contact:

Re: M31C build and source for material

Post by Al Rains » Fri Feb 12, 2021 1:48 pm

Give it a few more months for the current administration to work on it.
vetteman

bryanbdp
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 475
Joined: Sun Jan 19, 2020 1:17 pm
Location: W Simsbury CT

Re: M31C build and source for material

Post by bryanbdp » Sat Feb 13, 2021 6:50 am

Can anyone confirm the correct original size of the T angle? Based on the prints I inferred 2" wide and 1.5" deep overall.
45 MB - W Simsbury CT
Built to drive!

bryanbdp
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 475
Joined: Sun Jan 19, 2020 1:17 pm
Location: W Simsbury CT

Re: M31C build and source for material

Post by bryanbdp » Sat Feb 13, 2021 11:17 am

20210213_151628.jpg
Rest of materials showed up!
45 MB - W Simsbury CT
Built to drive!

bryanbdp
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 475
Joined: Sun Jan 19, 2020 1:17 pm
Location: W Simsbury CT

Re: M31C build and source for material

Post by bryanbdp » Sat Feb 13, 2021 5:15 pm

20210213_211051.jpg
A good nites work.
Unfortunately the print showed the rear leg brackets at 90 degrees apart. Another drawing shows them quite a bit further apart. (Expletive!)
Looking forward to cutting them off and rewelding, Not!
45 MB - W Simsbury CT
Built to drive!

bryanbdp
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 475
Joined: Sun Jan 19, 2020 1:17 pm
Location: W Simsbury CT

Re: M31C build and source for material

Post by bryanbdp » Mon Feb 15, 2021 7:19 pm

Link to video of simulation of CNC machining one of the parts for the mount. In actuality, the part will be flipped a few times, but the simulation is pretty cool...

https://www.dropbox.com/s/xaw7n2em3ft96 ... o.mp4?dl=0
45 MB - W Simsbury CT
Built to drive!

bryanbdp
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 475
Joined: Sun Jan 19, 2020 1:17 pm
Location: W Simsbury CT

Re: M31C build and source for material

Post by bryanbdp » Sat Feb 20, 2021 6:53 pm

I'm not gonna lie, this thing was a lot of work. Milled from 1.5" thick plate steel.
Still coming up to speed on tool paths, speeds and feeds, cutter selection etc...
SW clevis.png
Cad model in solidworks
mastercam tool paths.png
top tool paths in MasterCam
milling-interior.jpg
milling interior of clevis
finished-from-top.jpg
inner and outer contour finished, piece left for support
machining-from-side.jpg
machining side profiles and holes
finished.jpg
finished clevis
45 MB - W Simsbury CT
Built to drive!

bryanbdp
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 475
Joined: Sun Jan 19, 2020 1:17 pm
Location: W Simsbury CT

Re: M31C build and source for material

Post by bryanbdp » Sat Feb 27, 2021 2:53 pm

20210227_185127.jpg
A couple more parts ready
45 MB - W Simsbury CT
Built to drive!

bryanbdp
Sergeant Major of the Gee
Sergeant Major of the Gee
Posts: 475
Joined: Sun Jan 19, 2020 1:17 pm
Location: W Simsbury CT

Re: M31C build and source for material

Post by bryanbdp » Tue Apr 13, 2021 11:22 am

Mount is finished except for data plate. Man that thing is sturdy!
20210411_165647.jpg
20210411_165634.jpg
20210411_165627.jpg
45 MB - W Simsbury CT
Built to drive!


Post Reply

Return to “MB GPW Technical Knowledge Base”

Who is online

Users browsing this forum: dpcd67, Henk, Jim Thomason, k2tim, maurywhurt, Mendeman, shawnhoag and 60 guests