A tricky problem resolved

Well a great success today employing a bit of science to get a guy out of a fix. Unfortunately the chap accidentally picked up the wrong cleaning rod and that together with a tight new brush resulted in the rod stuck firmly in the bore.

He had tried all sorts of pulling and pushing and the bugger was not moving.

After asking for ideas and in particular a great idea from a mate at https://www.facebook.com/fehu.forge.92 I tried a two pronged approach and it worked.
First I turned the stuck rod into a slide hammer with machining up and attaching some steel parts the second part was to make and fit a grease nipple to the muzzle thread (you can get huge pressure from a grease gun).

The result is the rod came out and the barrel is good to go, not mention a happy customer……great result, good day, where sometime the hardest problems reap the biggest rewards

by golly that grease nipple idea is a cracker.....you could plurry well push just about any obstruction out using it no matter how stuck it was.

Sauer 100 should have just thrown it in the bin

Grease nipple idea is a great idea as long as it is blocked enough to get the pressure up

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Originally Posted by csmiffy

Grease nipple idea is a great idea as long as it is blocked enough to get the pressure up

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Yea good point, I guess you could put a patch or paper down first to create a seal if you needed to.

Brilliant.

Can actually bulge the tube with that - someone I know tried it. Luckily not a really expensive job, and the bulge was near the muzzle where the wall thickness was not flash. Ended up having to tap the object back a wee bit and it loosened up a heap once it started moving (wasn't going forwards). A squib load.

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Originally Posted by No.3

Can actually bulge the tube with that - someone I know tried it. Luckily not a really expensive job, and the bulge was near the muzzle where the wall thickness was not flash. Ended up having to tap the object back a wee bit and it loosened up a heap once it started moving (wasn't going forwards). A squib load.

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Yes have seen a few bores (funny enough many in 22) bulged by an obstruction, squib load, oil in bore etc.. I doubt you could have bulged this barrel with the process, the round chamber pressure is 60,000 PSI (be it depleting as it gets further down the bore), the grease gun can only produce a little over 3,000 PSI

@Fssprecision while the pics of the work you do shows your are a talented tradesman, I will beg to differ on you on the grease gun limit of 3000psi.
A hand held gun can do up to 10000psi the same as a lot of old school hydraulic porta powers.
Even used to do a very naughty trick to free up blocked grease passages in stuck pins where you would dig out as much old manky grease as possible, top it up with thin oil and screw a fitting to attach the grease gun to.
Then have at it.
If that didnt work it was usually a remove the pin job

Quote:

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Originally Posted by csmiffy

@Fssprecision while the pics of the work you do shows your are a talented tradesman, I will beg to differ on you on the grease gun limit of 3000psi.
A hand held gun can do up to 10000psi the same as a lot of old school hydraulic porta powers.
Even used to do a very naughty trick to free up blocked grease passages in stuck pins where you would dig out as much old manky grease as possible, top it up with thin oil and screw a fitting to attach the grease gun to.
Then have at it.
If that didnt work it was usually a remove the pin job

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To be honest I am not really sure, I just went with what the manufacturer of the grease gun advised on the web, would interesting to test it sometime, it certainly seems to be an unexpected source of high pressure available in the workshop. I know it worked a treat on this problem when we were all scratching our heads....Cheers

Yeah they can develop a surprising amount of pressure. Some commercial and electric grease guns can get well into 5 figures of psi. Enough to go through people skin when things let go anyway.