CYLINDER HONE

[Rexxwood]

Is there a cylinder honing tool available for Gamos?
What is the inside dia. and length on average of the power chamber?
Would a 1-1/8" brake cylinder hone tool work?

[yel01z06]

the brake hone works you will need to put an extender on it to get to the bottom of the power tube you can also use a dowel with a cut in the end of it and then put a piece a sandpaper in it to hone the chamber

[davee1]

I always wondered what kind of extender to use...as I have not gotten the brake honer yet. What kind of end is on the brake honer? 1/4" hex, 3/8" socket, 1/2" socket?

[yel01z06]

the end of the brak hone at least the one i have is a small round shank similar to that on a drill bit i used a drill bit extender and it seems to work fine i did however tape up the extender with some electrical tape in case it hit the side wall of the compression tube

[Rexxwood]

I went Harbor Freight today and picked one up (Honer see pic.) with an extension it doesn't quite fit into the driver extension the receiver is hex and the honer is round I think I can make it work with a little grinding, I also picked up some punches and a C-clamp 6' (spring compressor) some dental picks, 1200 grit wet/dry emery cloth some Moly Graph grease how different can it be?
Tomorrow I will pick up a little Beeman 1024 Takedown Rifle for $25.00 at the local pawn shop and try my skill at a full tune

[gunsup0331]

i had a extremely similar gun to that beeman, its very cheaply made but easy to work on. the stock makes a loud hollow noise when fired. Decent accuracy though.

[hdcharlie]

One of these would probably work better than a brake cylinder hone. I know they work most excellently on motorcycle cylinders.

http://www.brushresearch.com/brushes.php?c1=1

[Gene_SC]

I do not mean to be disrespectful but it is not a good idea to use the brush hones on air rifle's. They are to harsh for most of the metal actions that are made for air rifles. A brake hone is the best thing to use. honestly..

Gene

[yel01z06]

Gene ,I use a brake hone but some of those brushes were 600 grt. do you still think they would be to rough on the inside of the gun?

[brianag618]

The inside diameter is 25 mm give or take a mm or 2, this is just under one inch, brake cylinder hones come in basically 2 sizes, small 21 mm to about 30 mm and large 31 mm and up. Seeing that they are spring loaded and float freely go with the smaller size, just make sure it is between 21 mm and about 30 mm max, any larger and you will have a hard time inserting it. Also remember you only have to run it in an out a few times, do not over do it or you will start to polish the cy lender like glass and it will not hold any lubrication and run off creating a very dry fit. Hope this helps.

[Gene_SC]

If the brush was a loose fit, it might be ok, but to be on the safe side, I would suggest useing a brake hone.

Gene

[CharlieDaTuna]

Flex Hones are really not the best choice in most cases and few pro-tuners would use them. Once cut in with a flex hone, and because they cut so fast and hard, it is extremely easy to over do it in these soft metals and very hard to correct. You are far better off using a 3 point brake cylinder hone in the compression chamber. I do have flex hones but never use them in the chamber (unless the chamber were badly damaged to begin with)  but rather in the slotted area of the tube above the chamber and never go beyond the cocking slot. Also, the grit that I use is never more than 400 in either the flex hones or the cyl. hones except in leather seal applications. There I use 600 grit.

[hdcharlie]

Not worth it. Sorry.

[RWS460Shooter]

CharlieDaTuna - 9/9/2008  8:49 AM  Flex Hones are really not the best choice in most cases and few pro-tuners would use them. Once cut in with a flex hone, and because they cut so fast and hard, it is extremely easy to over do it in these soft metals and very hard to correct. You are far better off using a 3 point brake cylinder hone in the compression chamber. I do have flex hones but never use them in the chamber (unless the chamber were badly damaged to begin with)  but rather in the slotted area of the tube above the chamber and never go beyond the cocking slot. Also, the grit that I use is never more than 400 in either the flex hones or the cyl. hones except in leather seal applications. There I use 600 grit.

I've used a brake cylinder hone and replaced the stones with 400 grit disk brake caliper stones. Here is where I bought them...

http://www.mytoolstore.com/kd/kdbrak08.html

Rob

[brianag618]

Any good size auto store will have the 3 stone honing tool you need in 220 grt, they may have to order in the 400 grt stones for you, I had to wait for an order, the best they had was a replacement 320 grt set of stones. Using the brake cylender tupe hone gives you 3 flat stones doing the work for a nice clean smoth service, I found the other type hones tend to gouge the metal creating an uneven surface which you do not want to happen.