Author Topic: 3/4" bore (12 gauge) Mortar (Read 993 times)

Cat Whisperer · « **on:** February 26, 2005, 05:01:59 PM »

Time to play.

This one's 1.75" OD with 3/4" drilled bore. Pumpkin ball is from a 12 gauge mould (0.730 diameter). Bore is just a bit over two calibers deep.
This was another piece of the 1144SP. Trunions are 1/2" cold rolled set into pockets. Haven't decided how to fasten them yet - considering 1/4-20 hidden threaded rod inside and silver soldering.

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Powder keg · « **Reply #1 on:** February 26, 2005, 05:38:47 PM »

Hi, Nice little mortar CW. Looks like fun. I've used hidden studs before. I prefer that method.

GGaskill · « **Reply #2 on:** February 26, 2005, 05:48:23 PM »

TIG weld with no filler rod?

Cat Whisperer · « **Reply #3 on:** February 27, 2005, 01:28:44 AM »

Thanks much for the comments. Since I have only a flux-core wire welder, the TIG option is if I can get someone else to do it. Might try that, otherwise one of the other two options. Next one I'll build 1/2" longer and put the trunion all the way through and either press it in or set screw.

Again my objective here is to build a lot of different mortars to try out different ideas.

Cat Whisperer · « **Reply #4 on:** March 03, 2005, 03:11:33 PM »

Study in 3/4 bore. (One in background is 1" bore.)

Three of a kind. Variation in length and proportion. The middle one is still damp from cutting fluid.

Trunions on longer two are one-piece, drilled and 'pressed' in (1/2" crs in 1/2" drilled hole - nearly good enough, but WILL require pinning/soldering/set-screw.

Refinements include rounding the outside corners and using or not using powder chamber.

All in 1-3/4" 1144SP.

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CU_Cannon · « **Reply #5 on:** March 05, 2005, 03:57:38 AM »

Nice work. It is a good way of mastering techniques and getting some ideas. The center one looks the best imo. The proportions for the middle one looks about right. The one on the left looks too tall and skinny and the other short and squatty.

I'm starting to sound like Goldilocks. "This cannon is too big. This cannon is too small....."

Cat Whisperer · « **Reply #6 on:** March 05, 2005, 05:42:15 AM »

Quote from: CU_Cannon

Nice work. It is a good way of mastering techniques and getting some ideas. The center one looks the best imo. The proportions for the middle one looks about right. The one on the left looks too tall and skinny and the other short and squatty.

I'm starting to sound like Goldilocks. "This cannon is too big. This cannon is too small....."

Much the same thoughts across the board, except the little one is 'cute on steroids'.

Fun to do and the steel is free from scraps at work.