Thu Jun 19 10:14:39 1997 - Message No. 1071
From: Pierre DEBRAS

Subject: Re: Problems with some screws


Hi Achim and AT zealot,

well, Achim ... there is a solution to your problem. I understand the tap
on frame is damaged. The cure is to bore to a larger hole and tap it. For
example, if the damaged hole is M8 (*), you bore it 8 mm (?) and tap it
M10. Then, you insert a sort of tube which has a tap of M10 outside and M8
inside. Now, that's it, you can use your M8 screw to fix the protector.
This kind of 'tube' (there is certainly a better name!) I mentionned
requires a special tool to fix it. I believe I've seen such repair kit in
the HG catalog, in the tool area. You also need a set of tap (M10?) and
8mm (?) bit. The procedure is not very complicated by requires some tools
and a *LOT* of care. If you don't feel comfortable, your mecanic can do
it!

You may also check if welding a new nut behind the worn one isn't an
easier solution.

Please let me know if you want further explanation,
Pierre

(*) M refers to 'metric' normalization. Metric bolts/screews always have a
given thread for a given diameter. For example, an M8 screw has a 1 mm
thread. This also tell you what must be the hole diameter before tapping
for a given screew diameter. 6 mm in this case (I think).



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dipper@normans.isd.uni-stuttgart.de