[modeleng] Re: Simple Question

Barrie

More than likely it's caused by the "backlash" in the adjuster.  When you
put the spanner on the nut and adjust it to fit, the adjuster is pushing on
the side that forces the jaws closed.  Therefore, the clearance on the
adjuster is on the side where the jaws can only become smaller.

When you remove said spanner from the nut, the jaws will relax towards the
smaller size - 'cos they can't go t'other way.

Anyway, adjustable spanners should NOT be used on engineering bolts, screws
and nuts.  The correct sized, ring spanner, open ended or socket is an
engineering tool.  Adjustable spanners are ok for plumbing (actually pipe
fittings since plumbers deal in lead pipes and sheets that don't need
spanners) and gas fittings.

Simple !

Andy

-----Original Message-----
From: modeleng-bounce@xxxxxxxxxxxxx [mailto:modeleng-bounce@xxxxxxxxxxxxx]
On Behalf Of Barrie Purslow
Sent: 19 June 2009 21:07
To: Model Engineering List
Subject: [modeleng] Simple Question

Whenever I use an adjustable spanner I always make sure the jaws are
adjusted to be a snug fit on a hexagon. But why is it that when I remove the
spanner from the hex. I cannot get it on again without increasing the jaw
spacing?
Barrie
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