Shaft / push rod seals / leaks - What are people using?

[slats]

Hi guys,
just wondering if I could have some input as to what you are all using (what products) stock or custom made you are using for push rod seals and propeller shaft seals?
I am using the Subtech ones and find these have generally been ok. Only some very minor leaks from time to time.
What do others use?
How realiable are they in not leaking?
What would you recommend based on your experience?
Many thanks

[seahorse]

John,

Here's some newbie input that

John,

Here's some newbie input that I have learned from my local sub building mentor

I have been using the Subtech seals also, but replaced the original o-ring with a solid rubber o-ring. This works great on the 1/8" push rods and drive shafts. I use marine goop to adhear the outer brass seal to the end cap. Works like a charm !

Hope this helps

Paul

[JWLaRue]

...similar idea, but I replace

...similar idea, but I replace the original cup seal with an x-ring. The x-ring yields less friction, but seals at least as good.

-Jeff

[dietzer]

Jeff,

Do you have a source

Jeff,

Do you have a source for the x-ring?

Carl

[tabledancer]

Jeff,
I`d like to hear more

Jeff,
I`d like to hear more about this x-ring also.Do you have anything on how it holds up in a vacum or low pressure situation as in the RCABS that I`m using in my boat.
TD

[Guest]

Bellows or o-rings work fine

Bellows or o-rings work fine for me.

Andy

[bigdave]

The x-rings seal great, but

The x-rings seal great, but I do not recommend them for any of the smaller micro motors and servos. I have tested them and the friction is greater, and the smaller servos have a hard time overcoming that. They should also never be used for motors for a rotational sealing. The friction will melt the seal or overheat the motor. Trust Me! Been There! But for larger servos and non-rotational sealing they are great. BD.
You can get them from McMaster.

[JWLaRue]

...Dave is basically correct, though

...Dave is basically correct, though I have used smaller servos and they work fine. It's probably mostly due to the relative strength differences (torque) and not necessarily the size of the servo we're using.

However, I have not had the same experience as Dave when using for shaft seals. For example, I use these x-rings for my motor seals in a D&E 3.5 WTC...been using them for years with no failures.

-Jeff

[bigdave]

Hey Jeff,
I was thinking.

Hey Jeff,
I was thinking. It most likely has a lot to do with the speed the shaft is rotating in the seal as well. The faster the motor spins the shaft, the more the heat buildup. A lower gearing would work much better with the X-seals. Mine were spinning relatively fast. The motors were cooked, and the seals were melted to the shafts. Ouch!! BD.

[JWLaRue]

Hey Dave,

I have to agree

Hey Dave,

I have to agree with that! Heat is *not* our friend here.

-Jeff

[Guest]

I use simmerrings for motor

I use simmerrings for motor shafts

[tabledancer]

Dave
Have you ever used the

Dave
Have you ever used the x-rings where there was a vacum situation as in your ballast system,and how did they compare to the o-rings or standard subtech seals.
TD

[bigdave]

Yes I have TD,
They

Yes I have TD,
They work better than both the stock and O-ring but they were to hard on the system components. The servos could barley move the linkages, and the motors almost burned up from the strain. I had no speed and my run time was very short. I do not recommend them in my WTC's. BD.

[tabledancer]

Very good,thankyou for that good

Very good,thankyou for that good info. Any news on the 2 motor WTC,I have committed to the Revell "Gato" when it is released.The refit of 407 is almost done,the new endcaps were needed,solved the leakage problem. Thanks again.
TD

[tennesseejim]

I was looking around in

I was looking around in this site]http://www.excite.co.jp/world....b_dis=2[/url]

and found a clever sealing method. This gentleman uses syringes to seal both his propellor shaft and his push rods.

Take a look...