graphited yarn packing

[miniburrell]

Hi All

I am fairly new to model engineering, and currently building a Stuart 10V.
I have taken the open of a single piston ring instead of the three, but where do i get graphited yarn packing from.

Any tips or help would be appreciated.

Paul

[Tel]

Don't bother with it. Twist some ordinary plumber's teflon tape into a string and use that.

[jasonb]

Most of the model engineering suppliers will sell it such as Stuarts, Reeves, Blackgates, Bruce Engineering, Maidstone Engineering, GLR etc.

Jason

[mackintosh]

Hello Paul I have found silicone O rings to be excellent for these type of applications and can be purchased from any of the afore mentioned suppliers.
Bob

[ianmac]

I am with TEL.

The teflon tape is the money shot!

Its thinner and easer to get just what you need,

For example i used it on the gland packings for the cylinders on my G1 loco. I over tigntend first then backed off and its steam tight.

Also used it for the gauge glass and that worked a treat.

Actually come to think of it Ive used it for all the fittings ;D

[Jo]

Hummmm.... I have noted that teflon on a "moving joint" (piston rod gland) seems to roll itself tighter, where as graphited yarn seems to absorb oil and if anything swell up. Anyone any views on what impact that would have over time?

Jo

[Tel]

I've got piston glands packed with the stuff (and valve glands) that are still working 20 years later. Like Ian, I use it for just about everything.

[havoc]

I put a drop of steam oil on my fingers when twisting the teflon tape. Works fine.

[spamcanman]

wish I read this last week I have just bought some 1/16th yarn from Maidstone engineering