Loctite for the Quorn?

[Andrew TinsleyParticipant @andrewtinsley63637]

I am just about ready to start assembling the base and column for the Quorn. Professor Chadock talks of using Loctite to assemble the base components. I assume this was a long time ago and Loctite was Loctite!

So what grade of Loctite would he have been referring to for this application?

Andrew.

[Andrew TinsleyParticipant @andrewtinsley63637]

[KWILParticipant @kwil]

If the parts are clean and dry (no oil) Loctite 601, high strength, low viscosity.

[Brian HParticipant @brianh50089]

Agree with KWIL, make sure the parts are VERY clean and then use Lictite 601 for a permanent joint.

Brian

[egaParticipant @ega]

"So what grade of Loctite would he have been referring to for this application?"

The recomendation for 601 seems excellent provided that the fit is suitable – I believe there are grades which can tolerate a less than perfect fit – but I am not sure 601 was available in DHC's day. This grade seems not to be listed in my 1996 Loctite handbook.

Given the nature of the joint and its intended use failure seems unlikely.

I have found the technical information on the ARC website (relating to another brand) to be helpful.

[KWILParticipant @kwil]

With all due respect, anyone taking on the making of a Quorn Cutter Grinder will be capable of achieving the close and accurately angled fit.

[Neil WyattModerator @neilwyatt]

I'd suggest Loctite 641, you don't nee high strength and it will allow future dis-assembly with least risk of damage.

Neil

[Andrew TinsleyParticipant @andrewtinsley63637]

Interestingly enough, the rear bar should be a push fit and the front bar should be looser as it slides along between the two end castings.

Professor Chaddock actually set up his Quorn across a surface plate, there should be sufficient movement of the bars so that the assembly dries FLAT.

Someone said that high viscosity 601 is the thing to use. I would have thought a lower viscosity (almost gap filling) would be better. The end pieces that support the bars are almost a couple of inches thick, so maybe getting the Loctite everywhere would demand a somewhat lower viscosity? Just thoughts with no real knowledge of the subject!

Thanks everyone,

Andrew.

Whoops! I misread KWIL reply. He says that it is LOW viscosity for the 601. Should have gone to Specsavers. Sorry KWIL

Edited By Andrew Tinsley on 21/06/2017 12:29:17

[egaParticipant @ega]

Andrew Tinsley:

Checking the Quorn book (page 15) I see that DHC said:

"The front bar should be a close fit but free to move, the back bar should have appreciable clearance so that the front bar can find its own alignment."

I may have read your initial post too literally: whatever grade of Loctite DHC used is no doubt of less interest to you than the answer to the question what grade you should use now! It's some decades since I was in your positon but I do remember the feeling of satisfaction from actually starting to put the thing together; I'm glad to say my back bar is still in place.

[Andrew TinsleyParticipant @andrewtinsley63637]

I stand corrected on the fit of the back bar, seems that I am making more mistakes in typing a message than doing the job!

In actual fact my back bar is a push fit into the end castings. I have yet to set it up on a surface plate to find if I have made it too tight a fit! This I shall do, I just hope I have sufficient clearance to do the 4 fag paper test for truth, as specified by the Professor.

Andrew.

[Brian HParticipant @brianh50089]

A translation of 'fag paper' may be necessary for our American cousins. It means cigarette paper, for rolling cigarettes.

Brian

[egaParticipant @ega]

Andrew Tinsley:

No correction intended. As you yourself indicated, as long as the front and back bars are parallel and the front is free to move all should be well.

I wish you all good fortune with your build.

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