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The $100 challenge.....
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Billbobnz View Drop Down
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Posts: 867 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2023 at 9:15pm
Thanks Kiwi, I'm so far down digging the hole I'm in I just having to plough on....

I do like the seal and top hat you've done..

Somewhere at work I have some spare polymer parts of different densities left over from a job I did ages ago. I'm going to attempt to make a new breech seal with these and possibly piston seal if they are wide enough.
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KiwiTR6 View Drop Down
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Posts: 282 		Post Options Post Options   Thanks (0) Thanks(0)   Quote KiwiTR6 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2023 at 9:00pm
Bill, you're more game than I am! I'm going to leave the barrel in place and try to crown it by hold the breech block in my 4-jaw and support the other end in my fixed steady.  Will take a little bit of setting up and I'm not sure it'll work but I'll give it a go.

I finished my PTFE seal and made up a top hat (I think I've got it right this time?) so only the buttons to go. I've put a rubber washer under the seal to take the shock and hopefully protect the sharp leading edge I've formed.

Paul, this is the link to the case hardening powder I've just ordered > https://www.ebay.com/itm/225611131542





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Pauly5 View Drop Down
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Posts: 1411 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2023 at 6:25pm
Looking good!
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Billbobnz View Drop Down
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Posts: 867 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2023 at 5:09pm
I should be able to shim something into it.

I've shortened the barrel and it's awesome to look down and have a straight barrel! Took a little off the front and refaced it and will recrown it tomorrow. Also need to do the recess for the seal





Edited by Billbobnz - 04 Sep 2023 at 5:09pm
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Pauly5 View Drop Down
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Posts: 1411 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2023 at 3:44pm
How hard would it be to make a whole new breech block? Or should I say, is it worth doing that?
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Billbobnz View Drop Down
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Posts: 867 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2023 at 3:40pm
I ended up taking slightly more off than I should have so breech is slightly upwards at the moment without the seal in
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Billbobnz View Drop Down
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Posts: 867 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2023 at 3:38pm
Well um....

Was just looking at the breech seal to notice that it is shaped to match the angle of the breech!! Which means the breech angles down 6° and then the barrel angled back up from the end of the breech up 3°.....!

So..... I'm going to keep machining and shimming and re engineering untill I get it right..!

Which me luck 😂
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Pauly5 View Drop Down
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Posts: 1411 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2023 at 2:28pm
That looks nice. Will it effect the gap between comp tube and breech?
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Billbobnz View Drop Down
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Posts: 867 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2023 at 1:09pm
Just need to punch out the retaining pin beside the pivot hole then I used a punch and it came quite easily.

I've just machined my breech to 90° so looking much better
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Pauly5 View Drop Down
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Posts: 1411 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 04 Sep 2023 at 12:48pm
Bill, did it take much to get the barrel out of the block? Bit O heat?
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