sleeve pinching?
07-01-2009 | 11:30 PM
#31
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
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
06-20-2010 | 07:20 PM
#32
Joined: Mar 2009
Posts: 3,660
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.
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.
06-20-2010 | 11:04 PM
#33
Tech Elite
Joined: Aug 2001
Posts: 3,278
From: Bavaria, Germany
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.
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.
I posted the link earlier:
http://www.osrocketracing.com/
06-26-2010 | 05:34 PM
#36
He uses a cnc machine to pinch the sleeve rather than a mechanical arbor press like shown is Ray video's. I have engines pinched by both and they both do a steller job!!!
I did have a Novarossi 3sct pinched once and It was extremely hard to get the sleeve back into the crankcase. Not sure how this happen; maybe the die used to hold the sleeve left burrs on the outside.
Just remember to change the rod and maybe the bearings.
Pass you soon...
Last edited by lil-bump; 08-05-2010 at 11:14 AM.
07-13-2010 | 08:53 AM
#37
Tech Addict
iTrader: (22)
Joined: Jun 2009
Posts: 587
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.
Resizing is not that much and the results are far superior.
Check out Rcrenew.com
Resizing is not that much and the results are far superior.
Check out Rcrenew.com
07-13-2010 | 09:29 AM
#38
Tech Lord
Joined: Aug 2007
Posts: 14,044
From: Holland
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.
We from rcrenew advise only rcrenew ?
08-05-2010 | 07:30 AM
#40
Tech Fanatic
iTrader: (23)
Joined: Nov 2002
Posts: 833
From: 4373 Creek Road Chaffee,NY 14030 USA (716)783-5198
?
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.
08-06-2010 | 06:05 PM
#41
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.
08-10-2010 | 05:35 PM
#42
Tech Fanatic
iTrader: (23)
Joined: Nov 2002
Posts: 833
From: 4373 Creek Road Chaffee,NY 14030 USA (716)783-5198
rebuild
RayAracing
Of course that is a good thing
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