Re: Re: Re: Model Engineers Workshop volume103

> Hi Mike:
> I sure hope you're not planning to drive the ballscrew through an
> extension shaft that's been glued in place.
> That's a terrible idea...you'll never know when the darned thing will bust
> loose and destroy things.
> I realize that it may SEEM easier to do it this way, but I really doubt it.
> Turning a ballscrew end is not that big a deal...you just need patience and
> commonsense.
> By far the hardest part is dialling it in accurately enough...making an
> extension shaft doesn't relieve you of this requirement.
> If by chance, you overshoot and turn the shaft end too small, it's a far
> better option to simply sleeve the undersize journal than to add an
> extension.
> I realize that the MEW author claims his method to have been successful, but
> I still don't like it...it's inherently weak and no less effort to do
> accurately.
> Cheers
>
> Marcus

A good press fit with loctite will more than stand the amount of force a stepper can put out on machines of this class.
Bear in mind that 99% of electric motor up to 10kw only have the shaft pressed into the rotor and these never slip.

John S.



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