Hydraulic cylinders for rc construction models
 

What do you think about this cylinders?
http://www.ebay.com/itm/331910578727...84.m1555.l2649

Re: Hydraulic cylinders for rc construction models
 

cant really have any thoughts, no real info is given

Re: Hydraulic cylinders for rc construction models
 

Dimensions is 145/230 mm, pressure 25 atm.

Re: Hydraulic cylinders for rc construction models
 

is it double o-ring /what size it the thread for the fittings. they look real skinny
almost home made

Re: Hydraulic cylinders for rc construction models
 

OH and your the seller
alex393939 (123 )

Re: Hydraulic cylinders for rc construction models
 

You are not right.
I want to buy this cylinders for my KAT excavator

Re: Hydraulic cylinders for rc construction models
 

if you have a KAT then buy the rc4wd cylinders they work great
http://i1335.photobucket.com/albums/...pso7fh871p.jpg

video of the kat
https://youtu.be/1nSKkV7DrSA

Re: Hydraulic cylinders for rc construction models
 

But they more expensive

Re: Hydraulic cylinders for rc construction models
 

Alex, where are you from? And how about a pic of the insides? That is how I could tell you what I think of them. What a coincidence you and the seller have the same name!! Cool!! I'd say buy them just cuz of that!!

Re: Hydraulic cylinders for rc construction models
 

Magom have some pretty good prices on their cylinders also

Re: Hydraulic cylinders for rc construction models
 

I'm from Poland.
I do not know how to explain the coincidence of names
I want to buy two cylinders for may KAT excavator and I wanted to ask whether the experience of the use of these cylinders is on the forum

Re: Hydraulic cylinders for rc construction models
 

I think there going to be as bad as the ones that come with the kat. Cooper built his own cylinders and gave
Me the Rc4wd ones.

Re: Hydraulic cylinders for rc construction models
 

I try to buy this cylinders

Re: Hydraulic cylinders for rc construction models
 

Question for people making their own cylinders: What thickess do you use for o-rings? Or what do these ones on the market use?

Re: Hydraulic cylinders for rc construction models
 

See it's a new brand, GSK, from Kalinigrad. They are possible not known to anyone here at the forum yet. Great if you buy them and test them out and write a report here. It's positive they are from brass, not aluminium as some of the Chinese ones.

Re: Hydraulic cylinders for rc construction models
 

Use 1.5mm thinkness (sometimes 1.78) for the piston and rod seals, 2 off at each location. To seal between the front piece that contains the rod seals, and the cylinder pipe I use also 1.5mm (x1) when enough space. sometimes need to use 1mm here if thigh space. The 1mm seals are more vulnerable for damage when putting the cylinder pieces together, so a more thick seal is better. One need to study the tables for seal groove clearances to get the correct size grooves etc. If one got a 8mm rod, one should not use a o-ring that is exact 8mm inside diameter, but better 7 or 7.5mm max to get a good fit.

Re: Hydraulic cylinders for rc construction models
 

I'm wait new cylinders for my KAT :)

Re: Hydraulic cylinders for rc construction models
 

Today I received two cylinders for my KAT excavator from GSK Earthmovers.

Re: Hydraulic cylinders for rc construction models
 

what outside diameter?

Re: Hydraulic cylinders for rc construction models
 

12 mm