RC Truck and Construction  

Go Back   RC Truck and Construction > RC Truck's Ag and Industrial Equipment and Buildings > Construction Equipment > Construction Equipment Tech

Construction Equipment Tech Hydraulics, Electronics, General Engineering, ect in constr equip


Reply
 
Thread Tools Display Modes
  #1  
Old 05-07-2020, 06:06 PM
Cat966c Cat966c is offline
Green Horn
 
Join Date: May 2014
Posts: 205
Cat966c is on a distinguished road
Default Gasket maker (and etc)

Hey all

I was wondering: would gasket maker material and the other stuff (steel stik, epoxy, rtv silicone, 100 percent silicone) work for making my own o rings?
I know the steel stik and the epoxies are strong enough (700-4000 psi)

Thanks!
Reply With Quote
  #2  
Old 05-08-2020, 01:35 PM
ddmckee54 ddmckee54 is offline
Green Horn
 
Join Date: Dec 2011
Posts: 164
ddmckee54 is on a distinguished road
Default Re: Gasket maker (and etc)

Rings for what? That will have a LOT to do with whether or not it would work.
Reply With Quote
  #3  
Old 05-08-2020, 03:08 PM
Cat966c Cat966c is offline
Green Horn
 
Join Date: May 2014
Posts: 205
Cat966c is on a distinguished road
Default Re: Gasket maker (and etc)

For a hydraulic piston ��‍♂️
Reply With Quote
  #4  
Old 05-08-2020, 03:13 PM
Flycop2000 Flycop2000 is offline
Newbie
 
Join Date: Jul 2019
Posts: 19
Flycop2000 is on a distinguished road
Default Re: Gasket maker (and etc)

Would it not be easier to just buy O rings? They are not expensive.
Reply With Quote
  #5  
Old 05-08-2020, 05:24 PM
ddmckee54 ddmckee54 is offline
Green Horn
 
Join Date: Dec 2011
Posts: 164
ddmckee54 is on a distinguished road
Default Re: Gasket maker (and etc)

For a hydraulic piston just use a store-bought o-ring. From Ebay, Amazon, Aliexpress, or the dozens of other sites they can be had for about a dime a dozen if you look around. It isn't worth the hassle of trying to fabri-cobble a custom o-ring.

That stuff has its' uses, but this really isn't one of them. I used the high temp stuff from NAPA, in a 3D printed mold, to make a silicone boot for my 3D printer hot block. Still using it over a year later, it's probably got a couple hundred hours of use on it by now.

Last edited by ddmckee54; 05-08-2020 at 05:37 PM.
Reply With Quote
  #6  
Old 05-08-2020, 07:34 PM
Cat966c Cat966c is offline
Green Horn
 
Join Date: May 2014
Posts: 205
Cat966c is on a distinguished road
Default Re: Gasket maker (and etc)

Well: what if it’s an in between size?

And would this be ok? It’s neoprene rubber washer that’s cut to size, but it’s not exact all around, but it fits inside snugly and I’m using two per piston
Reply With Quote
  #7  
Old 05-08-2020, 07:35 PM
Cat966c Cat966c is offline
Green Horn
 
Join Date: May 2014
Posts: 205
Cat966c is on a distinguished road
Default Re: Gasket maker (and etc)

Reply With Quote
  #8  
Old 05-08-2020, 07:59 PM
crueby crueby is offline
Newbie
 
Join Date: Mar 2019
Posts: 84
crueby is on a distinguished road
Default Re: Gasket maker (and etc)

I'd check someplace like The O Ring Store - they have an enormous selection of all types of rings and seals.
Reply With Quote
  #9  
Old 05-08-2020, 09:23 PM
Cat966c Cat966c is offline
Green Horn
 
Join Date: May 2014
Posts: 205
Cat966c is on a distinguished road
Default Re: Gasket maker (and etc)

But would that �� and the other stuff I said work?
Reply With Quote
  #10  
Old 05-08-2020, 11:25 PM
Lil Giants's Avatar
Lil Giants Lil Giants is offline
BANNED
 
Join Date: Aug 2010
Location: Saskatchewan
Posts: 4,414
Lil Giants has disabled reputation
Default Re: Gasket maker (and etc)

Put it together, try it - find out,
__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!

Joe
Reply With Quote
  #11  
Old 05-08-2020, 11:42 PM
Lil Giants's Avatar
Lil Giants Lil Giants is offline
BANNED
 
Join Date: Aug 2010
Location: Saskatchewan
Posts: 4,414
Lil Giants has disabled reputation
Default Re: Gasket maker (and etc)

This how a piston should look, double o-ring; as well as double o-ring inside the cyl cap so oil doesn't seep past the rod. You can see another thin o-ring on the outside of cap that seals it when seated in the barrel.

__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!

Joe
Reply With Quote
  #12  
Old 05-09-2020, 01:57 AM
Cat966c Cat966c is offline
Green Horn
 
Join Date: May 2014
Posts: 205
Cat966c is on a distinguished road
Default Re: Gasket maker (and etc)

Quote:
Originally Posted by Lil Giants View Post
This how a piston should look, double o-ring; as well as double o-ring inside the cyl cap so oil doesn't seep past the rod. You can see another thin o-ring on the outside of cap that seals it when seated in the barrel.

Beautiful.
Yeah that’s what I’m interested in. The piston rod seals themselves: would mine above work, especially since I’m using 2??
They each fit pretty snugly, so I hope together they give me a good seal
Reply With Quote
  #13  
Old 05-09-2020, 03:29 PM
Lil Giants's Avatar
Lil Giants Lil Giants is offline
BANNED
 
Join Date: Aug 2010
Location: Saskatchewan
Posts: 4,414
Lil Giants has disabled reputation
Default Re: Gasket maker (and etc)

I would guess no bc outer diameter is not uniform.

You can buy cyl kits from Fumotec, make each cyl any length - stroke you want.
info@fumotec.de
__________________
Sharing knowledge is one thing that defies basic arithmetic logic --- the more you share, the more you get!

Joe
Reply With Quote
  #14  
Old 05-09-2020, 05:58 PM
frizzen's Avatar
frizzen frizzen is offline
Big Dawg On The Bone
 
Join Date: Jan 2016
Location: indy, indiana
Posts: 1,824
frizzen is on a distinguished road
Default Re: Gasket maker (and etc)

If you're going to do it the hard way, can you make a gasket punch? Sharpen a tube with the right ID for the OD you'd like the gasket to have. It'll have more of a fighting chance at sealing than handcut.

If you sacrifice a bigger o-ring the diameter you need, roll your own
https://youtu.be/d0uuSNGkYJY
(I believe it's Rubberized CA, rc car tire glue)
'Ave' had a better video on making them, but i can't find it
__________________
What do ya mean "Cars are neither Trucks or Construction"?
It's still scale, and i play fairly well with others, most of the time...
Reply With Quote
  #15  
Old 05-10-2020, 03:11 AM
Cat966c Cat966c is offline
Green Horn
 
Join Date: May 2014
Posts: 205
Cat966c is on a distinguished road
Default Re: Gasket maker (and etc)

Thanks!
So no it wouldn’t work, even if it’s double o rings handcut???
Yeah, I thought about doing the punch thing
Reply With Quote
  #16  
Old 05-10-2020, 03:14 AM
Cat966c Cat966c is offline
Green Horn
 
Join Date: May 2014
Posts: 205
Cat966c is on a distinguished road
Default Re: Gasket maker (and etc)

And what about pourable stuff? Would any of that work for an o ring?
Reply With Quote
  #17  
Old 05-11-2020, 12:50 AM
Cat966c Cat966c is offline
Green Horn
 
Join Date: May 2014
Posts: 205
Cat966c is on a distinguished road
Default Re: Gasket maker (and etc)

Bump
Reply With Quote
  #18  
Old 05-17-2020, 02:49 PM
Rimrock Rimrock is offline
Wannabe
 
Join Date: Jul 2013
Location: Western NO
Posts: 355
Rimrock is on a distinguished road
Default Re: Gasket maker (and etc)

There are pretty tight tolerances concerning hydraulic seals and the grooves they are fitted in. The seal on a piston or rod works that way that oil under pressure are to come in behind the seal, often a 'o-ring, and push it towards the rod, or cylinder wall for a piston seal. It's not the pure friction of a seal towards a surface that does the main sealing alone here, so a gasket being 'tight' on to a rod doesn't mean it will seal under pressure (can seal to a certain degree if there are no pressure, or quite low pressure) (Not all manufacturers of RC hydraulics follows, or maybe are aware of, these principles, like Magom that preferes using quite 'beefy' soft o-rings and not letting any oil come in on the backside helping make a tighter seal, and it works quite okay)
Of course it is allowed to try make one owns gaskets, but as few/none make their own o-rings, there are little experience about what materials and how to make them. O-rings are mainly made of neoprene, a compund similar to natural rubber but more durable. Material for o-rings can be purchased on a roll, and one can cut to length and glue together. But this mainly used for applications where there are little/no pressure involved. With a rod seal made of a plat rubber seal, it will be difficult for any oil come in and press the gaskets radially on to the rod. Personally I would say it is a waist of time even to consider making hydraulic seals by hand, one have more than challenges enough with making grooves for standard seals, and other machined parts of a hydraulic cylinder, to tolerance. Don't misundersand, generally it is very good and important being curious all the time, being creative, learn new things, ask questions about things, how to improve things and so on.
__________________
Soyland Industrier

Last edited by Rimrock; 05-18-2020 at 03:51 AM.
Reply With Quote
Reply


Currently Active Users Viewing This Thread: 1 (0 members and 1 guests)
 
Thread Tools
Display Modes

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off

Forum Jump


All times are GMT -4. The time now is 06:17 PM.


Powered by vBulletin® Version 3.8.6
Copyright ©2000 - 2023, Jelsoft Enterprises Ltd.