Author Topic: Starting a new project (Read 1528 times)

rifleshooter2 · « **on:** June 10, 2007, 03:43:30 PM »

Well here we go again. A little brass and a plan. Soon a grenade mortar I hope.

This is what I'm hoping it turns out like

Andy

GGaskill · « **Reply #1 on:** June 10, 2007, 05:57:38 PM »

Your trunnion stock looks a little small in diameter.

jeeper1 · « **Reply #2 on:** June 10, 2007, 06:50:56 PM »

I agree the trunnion does look undersized, I prefer 80 to 100% of the bore size. However in this style of mortar the recoil is absorbed by the base and the trunnions merely hold the tube to the base.

GGaskill · « **Reply #3 on:** June 10, 2007, 07:53:30 PM »

However in this style of mortar the recoil is absorbed by the base and the trunnions merely hold the tube to the base.

If the base is tightly inletted to the mortar.

Rickk · « **Reply #4 on:** June 11, 2007, 12:43:54 AM »

Bondo epoxy gel is perfect for doing bedding... worked for me anyway.

rifleshooter2 · « **Reply #5 on:** June 11, 2007, 07:10:58 AM »

The trunnion is 1 inch in diameter. I scaled up a picture of a tube like this and that was pretty close. With the breech being reduced in size I think it may look ok. I can always put a larger one on later if it looks funny. I intend to bed it nice and tight so the bed should take most of the recoil.
I have it bored out now

Andy

rifleshooter2 · « **Reply #6 on:** June 11, 2007, 02:55:36 PM »

Ok the front half is complete. I flipped it around and am holding it by the bore to cut the rear section.

Andy

Tropico · « **Reply #7 on:** June 11, 2007, 02:59:29 PM »

Wow It seems that bore cut fast., I cant wait to see this finished., What a nice looking choice for a mortari is !

lance · « **Reply #8 on:** June 11, 2007, 04:37:45 PM »

Quote from: Tropico on June 11, 2007, 02:59:29 PM

Wow It seems that bore cut fast., I cant wait to see this finished., What a nice looking choice for a mortari is !

i agree with Tropico, nice choice, and can't wait to see it done.

GGaskill · « **Reply #9 on:** June 11, 2007, 08:45:09 PM »

It seems that bore cut fast.

Brass cuts a lot faster than steel.

rifleshooter2 · « **Reply #10 on:** June 11, 2007, 10:50:09 PM »

Oh yea That stuff is great to cut.
Andy

rifleshooter2 · « **Reply #11 on:** June 12, 2007, 01:47:38 PM »

OK the easy part is done. now I have to make the bed.

Andy

Rickk · « **Reply #12 on:** June 12, 2007, 02:46:56 PM »

I like it... alot

Tropico · « **Reply #13 on:** June 12, 2007, 05:24:20 PM »

Quote

I like it... alot

I am going with Rickks comment

EL Caz 66 · « **Reply #14 on:** June 12, 2007, 05:32:13 PM »

Man the was quick!! Nice work ... What type of Mortar bed are you planning?

Ed

GGaskill · « **Reply #15 on:** June 12, 2007, 08:17:58 PM »

If those trunnions are just press fitted, be sure to leave some space underneath them in the mount so recoil isn't trying to bend them forward.

Double D · « **Reply #16 on:** June 12, 2007, 09:21:25 PM »

Any paint store should be able to color match that red paint. A raw wood color base would just not be right for this mortar.

Cat Whisperer · « **Reply #17 on:** June 13, 2007, 12:04:29 AM »

Could you post a picture of the tooling or the technique you used in cutting the beads around the bore?

rifleshooter2 · « **Reply #18 on:** June 13, 2007, 12:14:20 AM »

Quote from: GGaskill on June 12, 2007, 08:17:58 PM

If those trunnions are just press fitted, be sure to leave some space underneath them in the mount so recoil isn't trying to bend them forward.

The trunnions are one solid piece of 1 inch diameter stock and pass through the base. with a set screw holding it in place. so that with it being bedded solid in the base it should work. The Base will be a nice artillery red. Does anybody have a nice formula for that color that I can have mixed. I cut the beads free hand moving the tool like an etch-o-sketch.

Thanks for all the nice comments. Next project will be a first model King Howitzer. As soon as I save up enought for the stock.

Andy

Double D · « **Reply #19 on:** June 13, 2007, 04:24:21 AM »

Quote from: rifleshooter2 on June 13, 2007, 12:14:20 AM

...I cut the beads free hand moving the tool like an etch-o-sketch...

Andy

True Gunsmith technique!!!

rifleshooter2 · « **Reply #20 on:** June 13, 2007, 05:15:58 AM »

[[/quote]

True Gunsmith technique!!!
[/quote]

I would probably make a real machinist cringe.

Andy[real=475,325][/real]

Double D · « **Reply #21 on:** June 13, 2007, 08:03:57 AM »

On the contrary a true Machinist would understand and appreciate it...a Machine tool Operator would not comprend how you did it with out either code or a preformed tool.

m223 · « **Reply #22 on:** June 16, 2007, 08:10:16 AM »

Speaking as a real machinist, I love free handing it. Lets the creative juices flow. Nice work! Etcher sketch so true.