push rod seals

[JimClark]

Looking for small pushrod seals. I have some real small ones that fit into a .250 hole but just not big enough to allow for the rudder travel I want on my Micro Hydro. I was wondering if anyone can tell me the size of tube these Etti 2mm seals will fit over?

http://www.etti.com.hk/product_info.php?products_id=88

Jim

[NativePaul]

I have not bought them from ETTI but I regularly use what looks to be the same bellows from a different distributer, the end has a grommet built in so I mount them direct to a 7mm hole bored in the hull easier lighter and works perfectly, if you want to mount them over a tube I think stretching them over a 7mm tube would be your best bet for a good seal, although with a cable/zip tie it should seal round a 6mm tube, I don't seem to have one knocking around that isnt glued into a boat to test it out though.

[bigwaveohs]

I've been looking into seals for our latest project and have some of these but they are too small to use for rudder pushrod; they don't allow proper lateral motion due to the 7mm size.
I'm going to try the Aquacraft radio box seals...about 3/8" diameter...Tower and others sell them for $2.70 a pair.

[sailr]

We have them. $1 each.

http://minicatracingusa.com/mparts.html

[Shooter]

The ones that Sailr posted above work great for tight spaces. This is probably WAY over-kill, but I usually turn an aluminum plug and place an o-ring over the seal. It fits real nice in the groove on both the seal and the plug. If you're interested, I can send dimensions for the plug.