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Crosman hollow probe build
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kruzaroad View Drop Down
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Posts: 1748 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2023 at 9:55pm
Fear not billbob you can always use a drill and a file.
You'll have ball if you get one at work,and you got the old fella up the road to give you some seriously good tips and tricks.
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RangerPete View Drop Down
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Posts: 549 		Post Options Post Options   Thanks (0) Thanks(0)   Quote RangerPete Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2023 at 9:37pm
Hi Paul,
I don’t know much about pellets and probes, but would the beveled edge of the probe help in “reshaping” a damaged skirt as it seats it into the barrel?
I’ve often wondered if shaping a pellet probe exactly as you have done would be able to gently “re-round” a bent skirt helping it to seal better, be more accurate etc etc…
Walk quietly, but carry a big stick.
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Billbobnz View Drop Down
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Posts: 798 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Billbobnz Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2023 at 8:50pm
Mate they are making me want to get a lathe.....

Hopefully getting one at work soon. So hopefully will finish a few projects around here.

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kruzaroad View Drop Down
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Posts: 1748 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2023 at 11:36am
I found also that when taking close ups up it tends to make every little channel or groove look like a valley.
Hence why I was a dubious about if it was just photo or actual finish.
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Pauly5 View Drop Down
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Posts: 1186 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2023 at 11:31am
I drilled it, then followed through with an end mill bit to flatten the bottom of the hole. I will probably try sandpaper on a dowel, but it's the light that makes it look worse than what it is.

I don't have any reaming tools.
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kruzaroad View Drop Down
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Posts: 1748 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2023 at 11:14am
That looks good. I prefure a larger bolt handle personally, makes for easier working of bolt when your watching that starling moving around in the tree. Then you only have to take eyes off it to put pellet in.
Those little plugs are a good idea to block that screw hole.
Are you going to reem/polish the inside of the hollow probe to smooth air flow through it? It may just be the photos make them look worse than they are but it looked pretty rough on the inside.
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Pauly5 View Drop Down
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Posts: 1186 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2023 at 10:52am
I finished drilling and fitting a bolt to the probe last night. The bolt is one I had started ages ago, and is probably too big to most peoples liking, but the good thing is that they are interchangable, so as I develop a good method of making the bolts, I will replace it later.

Probe fits and slides well in the breech, but the pellet can catch on that annoying screw hole in the bottom, so I am thinking of turning up small delrin plugs to fit in there, and see if that works. 

Anyway here's a couple more photos.
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kruzaroad View Drop Down
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Posts: 1748 		Post Options Post Options   Thanks (0) Thanks(0)   Quote kruzaroad Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2023 at 9:32am
He put a pic of his lathe up on the site here
http://www.kiwiairgunners.co.nz/forum_posts.asp?TID=721
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Pauly5 View Drop Down
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Posts: 1186 		Post Options Post Options   Thanks (0) Thanks(0)   Quote Pauly5 Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2023 at 9:07am
Yea, it's a small one from the toolshed. Often referred to as a Chinese mini lathe.

I've had it a couple of years now and it's addictive learning how to set it up and use it. I'd recommend it if you're looking for another hobby.

One thing I have learnt to appreciate is that tolerances are so important, and you can often make an ordinary everyday item better by reducing tolerances.  
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jwabfrog View Drop Down
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Posts: 120 		Post Options Post Options   Thanks (0) Thanks(0)   Quote jwabfrog Quote  Post ReplyReply Direct Link To This Post Posted: 11 May 2023 at 8:36am
Awesome engineering Pauly, you obviously have a lathe? Jeweller's size or something bigger?
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