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[portside II]

Now me being a tight fisted modeler (except when it comes to tools,oh i love tools  ) .I have decided to make my own prop shafts and tubes ,with some sort of bearing .
As i bought myself a new lathe recently i suppose i ought to make use of it and having found some steel tube in lengths of 14" with a diameter,int8mm,ext 11mm, (thrown in a skip).And a pile of steel rod 6mm x 1m  ,i thought lets get to work .
Now what do i use for bearings ,i have some gun metal rod that would do and some brass rod as well , but what about something else ,whilst rumageing around a local skip i came across some chain ,the type used in industry for small conveyors etc (like a bike chain only bigger).
This chain was dismantled and the case bearings removed and measured , i found that the inner bearing was a snug fit on the 6mm bar and the outer bearing was only 1mm smaller than the tube ,so into the lathe with the tube and a  9mm drill fitted and the tube made to accept the bearing  at both ends.
the shaft was made up and tried in the tube and runs well,the only prob is that the inner bearing can drop out or in to the shaft .
After a brain storm with the lads down the pond on Saturday ,I did meet Mr Wiggy who gave me some ideas ,none of which i used (sorry mate) i decided to two pack them into the shafts .This was done by applying the glue to the inner bearing whilst halfway in the shaft and then whilst turning it in the lathe slowly i gently pushed the bearing flush with the tube and left the lathe running whilst the glue (12min epoxy) set.
After doing the other end the shaft was fitted and given a run on a motor on 6v for 20min ,and hey presto no grind or bite .
i will post some pics when i get them loaded up on photobucket.
daz

[portside II]

Right pics of my prop shafts and tubes

Being drilled out to take the bearing

The chain links and their bearings

The components ready to assemble

Going together

In the lathe ,glued up and turning until set

The finished thing  with thread and nut on end of shaft

Heres one i made with brass bushes

[Martin (Admin)]

What glue do you use Portside?

[Wiggy]

Hi Daz, pleased you got it sorted mate and I don't charge for ideas so nothing lost, lol. Am sending you an email about the regatta.

Cheers,

Paul......Wiggy ( Mr.??),lol.

[portside II]

Hi martin , the glue is araldite type 12min epoxy .
Thanks Wiggy , i did try drilling but the steel must be case hardened (tough stuff).will check my e-mail's
daz

[Bradley]

Hi Daz,
It may be that your steel is stainless which is very difficult to machine without the proper cutting fluid.  You probably already know this, but try a magnet on it - stainless will not hold on to it unless it is a lower grade.
Derek.   

[Bee]

Several different types of steel, some high carbon, are a recipe for corrosion. Add an oil tube.

[portside II]

I did think of that Bee  but as the shaft and cam's are a close fit i decided to fill the tube with some grease and give it a run .Oh and before i did that i gave the hull which it is fitted a wet test and there was no seapage either in the tube or boat from the shaft ,so with the added grease i should be ok ,and it will get rid of the squeek  .
daz

[hanna]

well done nice one portside II.
"o" and something else to clear stainless steel can be austenitic or non-austenitic type so it can be magnetic or non magnetic