Years ago, I solved a somewhat similar problem of bicycle handlebars which
slipped and rotated within the bicycle stem. I coated the center part of
the bars (where they were gripped by the stem) with a thin layer of epoxy
adhesive. Then, while it was still fresh, I wrapped a layer of about 220
grit aluminum oxide production sandpaper over the epoxy, with the gritty
side against the epoxy. When the epoxy hardened, I used a stiff brush and
water to remove the paper, leaving the 220 grit firmly stuck on the surface
of the epoxy layer. Worked great! RKS
>From: "Michael King" <[EMAIL PROTECTED]>
>Reply-To: [EMAIL PROTECTED]
>To: [EMAIL PROTECTED]
>Subject: Re: [Cameramakers] Slippery monorail
>Date: Mon, 21 May 2001 22:35:45 -0500
>
>What about shim stock in the blocks?
>
>
>>On Mon, 21 May 2001, Dave Schneider wrote:
>>
>> > I have an old Omega 45E monorail. The plastic clamps which hold the
>> > standards to the rail are not holding tight. I am very cautious about
>>over
>> > tightening the clamps since the 45E was famous for cracking these
>>plastic
>> > blocks. Even when fully tightened there doesn't seem to be enough grip.
>>Does
>> > any body have a fix for this? One thought was to rough up the aluminum
>> > surface of the rail with a little sand paper. Another thought was to
>>paint
>> > the rail with a flat enamel with some micrballoons mixed in
>>(microballoons
>> > are a powder like material used as filler in fiberglass and epoxy
>>mixes,
>>my
>> > intent is to give the surface just a little tooth). Any other
>>suggestions?
>>
>>Some ideas that come to mind:
>>
>> - Replace the plastic blocks with something tougher? That might be
>> difficult, espcially if the blocks are made of something like
>> Polycarbonate plastics since these really are quite tough and
>> durable.
>>
>> - Could the clamping screws be modified so that there is a piece of
>> somthing like rubber between the lock and the aluminum rail?
>>
>> - You could rough up the aluminum rail as you suggested, but that
>>might
>> also make it too small for the blocks to clamp onto it tight.
>>
>> - Coating with something having a high coefficient of sliding friction
>> also seems reasonable.
>>
>> - Is there any oil on the slide or clamping blocks? How about
>>cleaning
>> them to see if that helps?
>>
>>- Wayde
>> ([EMAIL PROTECTED])
>>
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