Office of Steam Forum for Model & Toy Steam Gas & Hot Air Engines

The Regular Stuff: Chat, Buy, Sell, Off Topic, etc. => General Discussion - Scale Model Gas Engines - Hit & Miss - Throttle Governed - Non-Compression – etc => Topic started by: Jim on October 29, 2020, 06:08:56 pm

Title: Re: O Ring Replacements
Post by: Jim on October 29, 2020, 10:40:19 pm

Thank you!

Title: Re: O Ring Replacements
Post by: Adirondack Jack on October 29, 2020, 10:34:14 pm

Yup. That’ll do er

Title: Re: O Ring Replacements
Post by: Jim on October 29, 2020, 10:21:16 pm

Thanks guys....just to make 100% sure as these will take awhile to arrive from China....these are what I need?

[attachimg=1]

Title: Re: O Ring Replacements
Post by: Adirondack Jack on October 29, 2020, 10:00:37 pm

Nope. You want 22 mm OD, 1mm ring diameter, which has to be subtracted twice to get the ID, which is 20
The website you show lists OD and rubber thickness, so you want 22x1

Title: Re: O Ring Replacements
Post by: Jim on October 29, 2020, 09:40:32 pm

So get these ones 21mm x 1mm ?

[attachimg=1]

Title: Re: O Ring Replacements
Post by: catman on October 29, 2020, 06:59:58 pm

The correct size is, OD-22mm, ID-20mm, diameter is 1mm. In looking at your screen shot it looks like it shows a OD of 20mm.  I have bought some replacements and the 22-20-1 are a perfect fit.

While I am not sure, I believe that all of Jins hit and miss engines have a 20mm piston. One of his newer engines uses a 11mm diameter piston, but that is not hit & miss.

Title: O Ring Replacements
Post by: Jim on October 29, 2020, 06:08:56 pm

Are these suitable O rings for Jin's engines (do all his H&M models take the same size 20mm x 1mm?)


[attachimg=1]