how to mount a motor in a scratch-build WTC

[raalst]

[color=#000000]hi all,

Maybe you can help me on the following ]



Edited By raalst on 1090336649

[petn7]

you could use a sort

you could use a sort of stuffing box for the motor's axle. after every few runs, you could "refill" that box with grease or Vasseline or whatever. that's what i'm doing on mine; the little box has a removeable grub screw. we'll see how long that lasts and how deep it allows me to go

[anonymous]

I think you will be

I think you will be best off by using a commercial mechanical seal. You don't mention size restrictions, shaft sizes etc.
I use a mechanical seal on a 4mm stainless steel shaft (SIMMERRING type NBR4X16X6A available from (a local )in the UK) distributor-BSL Ltd) and it gives a good seal with very little friction (unlike O ring seals).

Also not having a lathe, I clamp the seal using two bolts between two brass plates fixed to the end of one of my drilled bolts. I use a ball race in a similar manner at the dry end.

It is based on the designs in Norbert Bruggens book but without machining.

I have heard of people even gluing the seal to the end of the WTC to minimise the space used.

For really small diameter shafts (1mm approx), I have seen small O rings trapped (with grease added) in a heatshrink tubing sleeve. Which apparently gives a tiny but effective seal for rotary shafts or push rods.

David

My Webpage

[rcher]

SubTech sells a seal called

SubTech sells a seal called a SSS seal. From what I understand you mount the seal in your bulkhead and run your 1/8" motor shft thru it.

Of course that won't work if your motor shaft has a notch ground into it.