Shure M97xE failure

the thin end of the wedge
Ricketts223
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Shure M97xE failure

Post by Ricketts223 » 21 May 2019 20:05

Hi folks - long time lurker, first time question - last year I purchased a new Shure M97xE cartidge for my 1200mk2. Everything was great until this weekend, when the adhesive holding the cartridge body to the aluminum mounting plate let go. No damage to the stylus or body, and the dealer I purchased from last August is no longer :( very sad day.
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Has anyone ever had this happen before? Without my dealer I am looking at repairing. If anyone has any recommendations as to what glue to use I would be in your debt. I am thinking B7000 as I have used that on smartphones with good success but possibly good ol' epoxy may do as well.

There is a relatively large amount of freeplay as to where I can mount the cartidge back to the aluminum plate, any ideas as to ensuring I keep the alignment correct? I will have to realign everything afterwards of course but would really like to ensure the cartridge is aligned with the aluminum plate.

Thanks for any recommendations everyone,

Rick

Collux
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Re: Shure M97xE failure

Post by Collux » 21 May 2019 21:07

Whilst the photo looks quite traumatic, I think your situation is readily recoverable.

This issue will be fixed by application of new adhesive.
You must first carefully remove all traces of the old adhesive, so that a good 'key' is obtained for your new adhesive.
For alignment with the aluminium mounting plate: you should attempt as best as possible, to maintain the longitudinal centre lines of the plate with that of the cart body. Temporary shims/guides/spacers would assist here.

Any resulting misalignment here can be again corrected by subsequent re-alignment of the cartridge/stylus, when mounted back in the arm.

From what I can ascertain: B7000 is a generic epoxy adhesive based on E6000 from the Eclectic company USA.
Another alternative would be a 'Super' glue (Cyanoacrylate) -although that adhesive type, may not have quite the same performance as epoxy on smooth surfaces.

billshurv
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Re: Shure M97xE failure

Post by billshurv » 21 May 2019 22:52

Superglue works well if you have the speed and dexterity on the M97. Based on some tests someone I know did it will wick in quite well if you fancy putting things back together then gluing.

or epoxy if you prefer.

spfffan
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Re: Shure M97xE failure

Post by spfffan » 21 May 2019 23:48

Not that I have ever done this, but I'm recommend Super glue. And don't forget to remove the stylus to a safe place before proceeding!

Ricketts223
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Re: Shure M97xE failure

Post by Ricketts223 » 21 May 2019 23:52

Stylus is removed :) I didn't think superglue would work on a metal to metal joint...but in all honesty I've never tried. The thin layer of existing glue looks a bit like an epoxy but who knows. Thanks for the tips. And thanks for the immediate help for a stranger. I really appreciate it. I think this failure is a "I can't believe it is even possible" moment.

billshurv
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Re: Shure M97xE failure

Post by billshurv » 22 May 2019 00:22

I've had a number of older carts fall apart like this. Only a sliver of glue is used in production. you'll be back and running in no time :)

Ricketts223
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Re: Shure M97xE failure

Post by Ricketts223 » 22 May 2019 01:25

Supposed to rain tomorrow...this makes a good rainy day project me thinks :)

lenjack
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Re: Shure M97xE failure

Post by lenjack » 22 May 2019 03:14

I'm stunned to see this. Didn't know it was common. Are you sure this was a virgin cart? By all means, do your best to get the residual adhesive off. I think it imperative to get the best alignment. Is there a cyanoacrylate that will give you as much as 20 seconds of positioning time, followed by a quick set?

Ricketts223
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Re: Shure M97xE failure

Post by Ricketts223 » 22 May 2019 04:05

I had never heard of it before either. It was brand new, sealed in its metal case. I have a rubber tipped circuit board vise, that will hold it safely, so I am leaning toward epoxy, which will give me some positioning time before locking it down, after cleaning off the old adhesive

Sunwire
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Re: Shure M97xE failure

Post by Sunwire » 22 May 2019 04:28

I would use epoxy.
I had a Shure SC35C separate in the same way (although I dropped that one on the floor, so there was more reason for the failure).
It was a fortuitous accident. The plastic upper part of the SC35C is a flimsy piece. A truly bad design that pulls away from the metal cartridge body when you tighten the mounting screws.
I epoxied the metal body onto a Technics headshell weight that had mounting screw holes the required 1/2" apart. It's now a far more rigid mounting. Looks really ugly, though. :)

Ricketts223
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Re: Shure M97xE failure

Post by Ricketts223 » 22 May 2019 15:40

Tackled it

Removed the old adhesive - it was not an epoxy, but more like some semi-gelatinous green snot. Cleaned both surfaces with 99% ISO, used the B7000. If it doesn't hold well, I'll redo with epoxy. I've used the B7000 on smartphones with great success, so we'll see. Alignment was easy with the mounting plate remaining attached to the headshell. Clamped in my electronics vise

Stay tuned
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BMRR
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Re: Shure M97xE failure

Post by BMRR » 22 May 2019 15:44

This has happened to me with several Shure cartridges, although they were all several decades older than your M97xE. Shure's quality control in recent years has not been very good, unfortunately.

I re-glued mine using super glue or Krazy Glue or similar. They've held up for a few years so far.

Ricketts223
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Re: Shure M97xE failure

Post by Ricketts223 » 22 May 2019 16:19

BMRR wrote:
22 May 2019 15:44
This has happened to me with several Shure cartridges, although they were all several decades older than your M97xE. Shure's quality control in recent years has not been very good, unfortunately.
Surprising for me - I was disappointed as well. I should have kept my V15 Type IV from back when I had hair

lenjack
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Re: Shure M97xE failure

Post by lenjack » 22 May 2019 16:46

Did you get a really thin film?

Ricketts223
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Re: Shure M97xE failure

Post by Ricketts223 » 22 May 2019 18:34

I did, yes. The adhesive went on well. Says full strength in 48 hours so waiting with baited breath

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