help needed for a glued headshell

snap, crackle and pop
AsOriginallyRecorded
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Re: help needed for a glued headshell

Post by AsOriginallyRecorded » 31 May 2018 04:41

Some additional study indicates that heat in excess of 500 to 550 degrees is the recommended procedure to soften the loctite sufficiently to allow removal. This, of course, would likely result in destruction of component parts, especially the wiring. Also recommended on the Henkel site,is the application of methylene chloride (?)and significant patience. Not sure what or where to obtain as far as the methylene chloride is concerned, but a real option. Option #3 is use of acetone apparently. Your results will be very interesting to all here. [-o<

Massimiliano
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Re: help needed for a glued headshell

Post by Massimiliano » 31 May 2018 12:07

Thank you ALL for the suggestions and the good advices: I really appreciate.
I'll get on it as soon as possible.

62vauxhall
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Re: help needed for a glued headshell

Post by 62vauxhall » 31 May 2018 12:25

If/when you're successful, and hopefully you will be, I guess you'll learn why a previous owner battened down the headshell in the first place

Massimiliano
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Re: help needed for a glued headshell

Post by Massimiliano » 31 May 2018 13:41

62vauxhall wrote:If/when you're successful, and hopefully you will be, I guess you'll learn why a previous owner battened down the headshell in the first place
Another Lesa MTT owner told me that the plastic joint between shell and tonearm is famously frail. I guess some genius thought that red Loctite was the perfect remedy :x

JDJX
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Re: help needed for a glued headshell

Post by JDJX » 31 May 2018 15:27

Loctite says you have to apply heat greater than 550 degrees F to break its bond. Hopefully, it's just nail polish.

BTW, acetone is classified as an "organic solvent"
Fact is, even the human body produces very small amounts such as in urine etc.

Some organic solvents are extremely hazardous but acetone is relatively safe when used in small amounts like in nail polish remover, etc. :)

Massimiliano
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Re: help needed for a glued headshell

Post by Massimiliano » 31 May 2018 16:50

JDJX wrote:Loctite says you have to apply heat greater than 550 degrees F to break its bond. Hopefully, it's just nail polish.

BTW, acetone is classified as an "organic solvent"
Fact is, even the human body produces very small amounts such as in urine etc.

Some organic solvents are extremely hazardous but acetone is relatively safe when used in small amounts like in nail polish remover, etc. :)
Really interesting. I thought acetone was very toxic.

JDJX
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Re: help needed for a glued headshell

Post by JDJX » 31 May 2018 17:43

BTW... more than you probably wanted to know about acetone... :)

https://www.atsdr.cdc.gov/phs/phs.asp?id=3&tid=1

Sunwire
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Re: help needed for a glued headshell

Post by Sunwire » 31 May 2018 19:45

"organic solvent" just means the solvent contains carbon.
It says nothing about whether it is toxic or not.

MandM
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Re: help needed for a glued headshell

Post by MandM » 31 May 2018 22:14

you realize that the previous person probably used Loc-Tite because the threads were stripped and the nut was not holding the headshell in place. Breaking the joint may be worse than letting it be.
Mike M

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Re: help needed for a glued headshell

Post by JDJX » 01 Jun 2018 01:39

Sunwire wrote:"organic solvent" just means the solvent contains carbon.
It says nothing about whether it is toxic or not.
I believe that is what I said . :)
Some organic solvents are extremely hazardous but acetone is relatively safe when used in small amounts like in nail polish remover, etc. :)

Massimiliano
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Re: help needed for a glued headshell

Post by Massimiliano » 01 Jun 2018 08:09

wrote:you realize that the previous person probably used Loc-Tite because the threads were stripped and the nut was not holding the headshell in place. Breaking the joint may be worse than letting it be.
Mike M
True, but I wish I could change the shells/cartridges on this TT. Furthermore, this awful red stain really bothers me, so I'd rather face a thread makeover.

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Re: help needed for a glued headshell

Post by Copperhead » 01 Jun 2018 12:34

Massimiliano wrote:
wrote:you realize that the previous person probably used Loc-Tite because the threads were stripped and the nut was not holding the headshell in place. Breaking the joint may be worse than letting it be.
Mike M
True, but I wish I could change the shells/cartridges on this TT. Furthermore, this awful red stain really bothers me, so I'd rather face a thread makeover.
Have you tried acetone yet? Thread has turned into a spec sheet for hazardous chemicals.

Ottermel
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Re: help needed for a glued headshell

Post by Ottermel » 01 Jun 2018 17:26

I wonder if putting the assembly into an ultrasonic bath would loosen the connection!?

lenjack
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Re: help needed for a glued headshell

Post by lenjack » 01 Jun 2018 18:16

Ottermel wrote:I wonder if putting the assembly into an ultrasonic bath would loosen the connection!?
I like this idea, but consider the physical difficulty involved. you'd need at least 3 hands.

nat
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Re: help needed for a glued headshell

Post by nat » 01 Jun 2018 23:22

Maybe I'm an optimist - I think that the red stuff, nail polish or loctite as it may be, is just daubed on to lock the collar. I'd do whatever I could to see if it could be chipped off enough to turn the collar and see if it releases that headshell.
Otherwise, you will have to either mount cartridges from below the headshell, a pain, or unmount the arm to mount cartridges, also a pain.
Frankly, the red stuff is so badly applied that I doubt the applier was organized enough to actually inject it into the internals.