Bryson Posted July 20, 2007 Share Posted July 20, 2007 Hello all, I have some small (M3) Allen screws on one of our cinema projectors that are coming loose all the time, so I thought to myself: I'll put some Loctite on there. But here's the thing: there is a bewildering array of different types of Loctite, and having never bought any before, I have no idea which one I want. Any ideas? Link to comment Share on other sites More sharing options...
Neil Hampson Posted July 20, 2007 Share Posted July 20, 2007 We use a few different types of threadlock, Loctite 'Nut lock 243' is the general purpose one, 'Screwlock 222' is a slightly weaker grade usefull if you need to adjust the screw after setting. both of these are availble as a bottle. Threadlocker 248 is a medium strengh, similar to 222 but comes in a 'pritt stick type package Link to comment Share on other sites More sharing options...
JimWebber Posted July 20, 2007 Share Posted July 20, 2007 This Is what I would use... Or RS 693-848 may be an option. HTH Jim Link to comment Share on other sites More sharing options...
Neil Hampson Posted July 20, 2007 Share Posted July 20, 2007 This Is what I would use...It seems that all of the 'domestic' loctites are identified by colour, rather than the ID number, for example 222 is purple. It allows an easier regognition when slopped all over a machine.Or RS 693-848 may be an option.Which just happens to be ... Loctite 243You will need t decide whether or not you need to remove the screw at a later stage, also bearing in mind this is on a projector, is the temperature an issue as there are specific variants for high temperature use. Link to comment Share on other sites More sharing options...
Peter F Posted July 20, 2007 Share Posted July 20, 2007 Nail varnish is a surprisingly good substitute. Peter Link to comment Share on other sites More sharing options...
Bryson Posted July 20, 2007 Author Share Posted July 20, 2007 Yeah, it is right by the gate, so there is a lot of vibration and heat in that area. 243 looks like the right one so far, unless there's a temperature issue with 243? Link to comment Share on other sites More sharing options...
Tomo Posted July 20, 2007 Share Posted July 20, 2007 Would you like to see the Loctite 243 Spec Sheet Claims to be happy up to 150 deg C Link to comment Share on other sites More sharing options...
gyro_gearloose Posted July 21, 2007 Share Posted July 21, 2007 How about using some form of shakeproof washer? You won't have any problems with heat. Link to comment Share on other sites More sharing options...
lightsource Posted July 24, 2007 Share Posted July 24, 2007 How about using some form of shakeproof washer? You won't have any problems with heat. Would agree with the shakeproof's, probably a lot cheaper, and it's easy to get them off if you need to. Link to comment Share on other sites More sharing options...
JimWebber Posted July 25, 2007 Share Posted July 25, 2007 I have some small (M3) Allen screws on one of our cinema projectors that are coming loose all the time, so I thought to myself: I'll put some Loctite on there. Shakeproofs may be an option, but in my experience, many cap-headed bolts are fitted into a counter-bored hole. This may make fitting a shakeproof washer difficult. Your mileage may differ! Jim Edited for an "h" Link to comment Share on other sites More sharing options...
Don Allen Posted July 25, 2007 Share Posted July 25, 2007 I was taught to use Loctite 243 (blue) on all screws in MAC fittings when I did the Showtec course in Australia. Link to comment Share on other sites More sharing options...
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