Thread: GTR BTS Flushing System

Good day

Do any of you know thd GTR BTS flushing system? I see PTG has ig on their website and was interested to hear how it works.

Regards

Konrad

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I checked out the PTG link. Doesn't look like you get much for your $150. Looks very similar to my home-made system. I used a carbonator pump ($50 on ebay), and a Deublin rotary union ($25 ebay) and then just some tubing and a bucket from Lowes. I modified my pump with a lighter spring to give about 20 psi (v. the 150 psi it put out as it was) and that was about it. I use Houghton HOCUT 795MP-RHS water based coolant.

Where did you get that fine, precision machined, green cutting fluid redirection device???

My own custom design. I'll sell you one for $100.

Originally Posted by GenePoole

I checked out the PTG link. Doesn't look like you get much for your $150. Looks very similar to my home-made system. I used a carbonator pump ($50 on ebay), and a Deublin rotary union ($25 ebay) and then just some tubing and a bucket from Lowes. I modified my pump with a lighter spring to give about 20 psi (v. the 150 psi it put out as it was) and that was about it. I use Houghton HOCUT 795MP-RHS water based coolant.

Thank you for the info and photos.

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Good day.

So i made a rotary coupler using some stainless steel, a bearing and an oil seal. It works great and lo leaks.

Here is a photo.

For now i use some tubing and hose clamps to connect to the coupler.

Regards

Konrad

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Here is some more pics.

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Have it, works fine.
Why buy through PTG? Just buy direct from Greg...
Model BTS | gretanrifles

I switched from a Gre-Tan to a generic Deublin rotary coupler. I drill/tap the muzzle end of the blank for 1/4" NPT. Much better flow, more secure, and it puts the sacrificial first inch of the muzzle to use. If I need to set a barrel back, I have cutoffs with the pipe thread remaining that are threaded to screw on 1/2-28 or 5/8-24 muzzles.

Seems a lot of unnecessary work....

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Originally Posted by jasonixo

I switched from a Gre-Tan to a generic Deublin rotary coupler. I drill/tap the muzzle end of the blank for 1/4" NPT. Much better flow, more secure, and it puts the sacrificial first inch of the muzzle to use. If I need to set a barrel back, I have cutoffs with the pipe thread remaining that are threaded to screw on 1/2-28 or 5/8-24 muzzles.

This is also how I do it as well. works great and never leaks and can spin 1200rpm with no hose clamp wobbling all over the place.

Originally Posted by Danny1788

This is also how I do it as well. works great and never leaks and can spin 1200rpm with no hose clamp wobbling all over the place.

You running a carbide reamer? Never heard of running HSS at that high a speed.

Originally Posted by Danny1788

This is also how I do it as well. works great and never leaks and can spin 1200rpm with no hose clamp wobbling all over the place.

How fast are you feeding that in? You need to have a reasonable chip thickness to keep the reamer from chattering.

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Originally Posted by tobnpr

You running a carbide reamer? Never heard of running HSS at that high a speed.

I doubt he’s chambering at that speed, but on shorter barrels, I have my flush system hooked up start to finish. I clamp the RPMs at 4500 but I have tested my flush to 6000 RPM and could get away with it just fine.

Originally Posted by tobnpr

You running a carbide reamer? Never heard of running HSS at that high a speed.

He said he can run the coupler to 1200 rpm w/o wobble.
Didn't say he chambered at 1200 rpm.

Originally Posted by tobnpr

You running a carbide reamer? Never heard of running HSS at that high a speed.

I don't chamber at 1200rpm, normally around 220rpm. But I have hooked up the muzzle flush system being taped and centered it doesn't wobble or give me any vibration when turning the tenon at 1000rpm and threading at 360rpm. Also I cut the small chamfer on the chamber with a carbide boring bar and spin it at 1000rpm with the muzzle coupler still hooked up.


heres the one I used and its super cheap, I use a brass 1/4 by 1/8 NPT bushing to thread into the barrel. SS 9SS04MP25XFP25-Z- - Super Swivel - 1/4" Male Pipe X 1/4" Female Pipe - 90 Deg | eBay

Originally Posted by Konrad308

Here is some more pics.

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This one i made cost me $6 to make and maybe an hour om my lathe. It works great. I have not used it faster than 300rpm. I chamber between 40 and 50rpm so dont really see a need for anything better. The rubber tube is a bit floppy but works and is quick to install. Sometimes when you rechamber there is no extra barrel length to sacrifice so the tube comes in handy there.

A big thank you to everyone for the comments and photos. Much appreciated.

Regards

Konrad

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I have seen some setups that use an airline quick connect as a swivel fitting.

I tried the airline swivel and it worked for a little bit but eventually started to leak, its not really meant to be spun like that and the seals wore out quick.

Originally Posted by Danny1788

I tried the airline swivel and it worked for a little bit but eventually started to leak, its not really meant to be spun like that and the seals wore out quick.

Dual Head Air Chuck Washer | Milton Industries