Re: arsclist 78 cleaning machines.

[Jerome Hartke <jhartke@xxxxxxxxxxxx>]

Loctite supplies many adhesives. Their "Threadlocker" adhesive is used
for "preventing nuts, bolts, and screws from loosening due to shock and
vibration." Loctite 222 is "General purpose, low strength for 1/4" and
smaller diameter fasteners. Hand tool removable. Set time is 20 minutes.
Gap fill is 0.005". Color is purple." It is chemical resistant and has a
very wide temperature range. It is widely available at about $10 for 10
ml (0.34 oz). One supplier is McMaster-Carr, P.O. Box 440, New
Brunswick, NJ 08903-0440, tel 732-329-3200, fax 732-329-3772.

Jerry
Media Sciences, Inc.

Graham Newton wrote:
> 
> Don Cox wrote:
> 
> > It sounds as though some Loktite on those screws would be an
> > improvement to the design.
> 
> It certainly would prevent the screw coming loose again, provided that the
> set screw was accurately located to the flat on the shaft in the first place.
> The problem in the Monks machine is that the screws are located in a
> sheltered spot and should it become necessary to disassemble things at some
> later date, the LOKTITE would make it very difficult, particularly if the
> wrong kind of LOKTITE was used!
> 
> I already provided this information privately to another list member but it
> is probably worth repeating here:-
> 
> There is a tapered "flat" on the turntable shaft, and if you locate the
> turntable mounting too low on the flat (it should be about 1/2 way down
> the surface of the "flat") or you don't get the set screw straight on the
> "flat", the screw will work loose and you will have this problem repeatedly.
> The supplied small Allen wrench is awkward for this purpose, but a long
> screwdriver style wrench (available at most hardware stores) will simplify
> the task greatly.
> 
> The second screw provides a means of inhibiting any rotating motion, BUT,
> the trick to getting it right is to slightly rock the turntable mount, back
> and forth, while you are lightly "finger" tightening the screw that faces the
> "flat" on the shaft.  You will clearly feel the location of the "flat" and as
> you tighten the screw, a point will be found where you can't rock the mount
> any further.  At this point, tighten the "flat" screw securely, and then
> tighten the other screw securely.  This whole procedure should not take more
> than 15 minutes to do successfully.
> 
> This procedure was followed with my own "Archivist" machine and the turntable
> has not come loose with over 1,500 records cleaned since.  Any other machine
> should be no different.
> 
> ... Graham Newton