Originally Posted by gesser26 (Post 6012855)

I have made my own pinching tool that works very well.
I used a collett from our bridgeport and machined a holder for it. I then mounted it on a flat piece of steel so I can hold it.
The collett is threaded at one end, It slides in the holder I made and I use a torque wrench to pinch it. Very easy to control.
I have done quite a few and am very happy with the results.
More people are finding that I have this and are asking me to pinch their sleeves.
Most of the time it does seem to give the engine a bit more life but it has lost a little bit of performance. Still good for practice or a back up engine if needed.
Greg Esser

Originally Posted by dreaux (Post 7567111)

how long can i expect a pinch to last on a O.S. sleeve? Is it even worth it? I sent one off to rayaracing. I read somewhere that pinching a o.s. sleeve in particular is pointless because the liner o.s. uses is thiner, not like nova and picco.

But i always thought o.s. sleeve was as thick as a picco i have. Anybody pinch any o.s. motors? I have about 6 o.s. sleeves i wana pinch. Sent one to ray to see if it's worth it. They are all in good condition too.


and who is o.s. rocket? I keep reading about him but can never find him.

Originally Posted by dreaux (Post 7568773)

he says he uses a cnc maching in two stages and that he doesn't pinch them but uses instead.

That does not make any sense. There is no way to get the sleeve smaller unless you pinch it.

Originally Posted by heidmann1 (Post 7664726)

Those sleeve pinching ring/clamps are a joke. They out of round the cylinder and do not taper it at all. They leave some sides of your piston too tight in the sleeve then other parts loose. They feel tight but There is not a correct fit of the psiton/sleeve. Since RC engine rely on metal to metal sealing of the piston/sleeve if its not absolutly perfectly round. It will not run good and not last.

Originally Posted by heidmann1 (Post 7664726)

Check out Rcrenew.com

Originally Posted by g-wan (Post 7764306)

may i know where can i get this stuff since i got alot of my old engine that is now being display in my room as they dont have new sleeve or being discountined..wish i can get 1 of those

Originally Posted by RayA (Post 7764741)

I wouldn't suggest your purchasing any kind resizing equipment , and still that no matter which requires a reasonable amount experiences to learn craft , for your own personal use in doing only a few engines. Ask around your racing community and you may find someone that is tooled and experienced to do your engine models. I am tooled for resizing ALL car, truck, buggy, and truggy engine models. Feel free to email me with questions you may have.:nod:

Originally Posted by g-wan (Post 7771533)

well it hard to say,but speak to true its hard to find someone that can rebuild back the old engine here,as our choice is limited,rebuild or buy new engine..that the only choice we have,so wish i can sent some of my engine part for rebuild..:cool:

Originally Posted by jakerz (Post 7791494)

RayA does the best work...he gets all my motors. Super professional, quick and great prices.