[modeleng] Re: How do these work please?
- From: "TEL" <tel@xxxxxxxxxxx>
- To: <modeleng@xxxxxxxxxxxxx>
- Date: Mon, 23 Apr 2007 03:37:52 +1000
Agreed Ken, they are very easy to make as needed and the screw head only
needs to be buried a little below the surface. You can even make a
shouldered version for facing washers, collars etc.
> Only a rather small hole is required to tighten the screw so they work
well
> in an almost blind hole. A bolt and nut based mandrel using a very small
> bolt would not be nearly as rigid as these expanding mandrels.
>
> > -----Original Message-----
> > From: modeleng-bounce@xxxxxxxxxxxxx
[mailto:modeleng-bounce@xxxxxxxxxxxxx]
> > On Behalf Of Tony Wells
> > Sent: Sunday, April 22, 2007 12:18 PM
> > To: modeleng@xxxxxxxxxxxxx
> > Subject: [modeleng] Re: How do these work please?
> >
> > Thanks Ken, and Peter of course. What puzzled me is that while it looks
a
> > bit like a pin chuck, to grip inside a hole, it would only be of use
with
> > a
> > through hole, for access to the set screw adjuster, where a nut and bolt
> > might be just as easy.
> >
> > Tony.
> > ----- Original Message -----
> > From: "Ken Strauss" <ken.strauss@xxxxxxxxxxxx>
> > To: <modeleng@xxxxxxxxxxxxx>
> > Sent: Sunday, April 22, 2007 3:16 PM
> > Subject: [modeleng] Re: How do these work please?
> >
> >
> > > They're very simple. Just a cylinder of steel (?) that has six slits
> > along
> > > the axis to make fingers. A central hole is drilled and tapped.
> > Inserting
> > > a
> > > flat-head screw expands the fingers. It is easier to see the design if
> > you
> > > click on "View larger picture" on the eBay listing that you
referenced.
> > >
> >
> >
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> >
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>
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