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How to Repair Glass Microwave Turntable?

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Forum topic by jasoncarpentry posted 07-27-2020 07:25 PM 483 views 0 times favorited 12 replies Add to Favorites Watch
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jasoncarpentry

149 posts in 3536 days


07-27-2020 07:25 PM

Topic tags/keywords: glass repair microwave epoxy

I realize this isn’t a wood-related question, but here goes …

I’ve got a small microwave oven with a ~12” diameter glass turntable. It recently broke into two pieces, and I’d like to glue them back together. What kind of glue would hold up to microwave conditions? How about epoxy?

Thanks in advance!

-- Jim in Tennessee


12 replies so far

View John Smith's profile

John Smith

2722 posts in 1045 days


#1 posted 07-27-2020 07:29 PM

you don’t fix it – you buy another one.
I have seen them on ebay and occasionally in the Thrift Stores.
but of course any repair can hold up for a week or even a year.
doesn’t cost anything to at least try.

.

-- there is no educational alternative to having a front row seat in the School of Hard Knocks. --

View MrUnix's profile

MrUnix

8239 posts in 3081 days


#2 posted 07-27-2020 10:58 PM

That UV activated stuff is supposed to work well with glass… and epoxy probably would as well. Don’t know how either of them would hold up to the RF and heat though.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

View LesB's profile

LesB

2620 posts in 4325 days


#3 posted 07-28-2020 12:27 AM

You can try CA glue (aka, Superglue). It repairs glass but I don’t know how it will stand up in the MW.
John had the best idea but you might find a new glass plate costs about half as much as a new microwave oven.

-- Les B, Oregon

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Craftsman on the lake

3514 posts in 4320 days


#4 posted 07-28-2020 01:04 AM

search on amazon for ‘replacement microwave plate’. They’re 15-25 dollars though. A new, small microwave can be had for about $50 so you’ve got to make that decision.

-- The smell of wood, coffee in the cup, the wife let's me do my thing, the lake is peaceful.

View homestd's profile

homestd

18 posts in 776 days


#5 posted 07-28-2020 04:18 AM

My wife broke my favorite plate. I glued the two pieces using West Systems epoxy. It’s been about a year now and still good. I wondered about heat because I have my water heater cranked but so far no problems.

-- Mother is the necessity of most invention.

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Dark_Lightning

4209 posts in 3991 days


#6 posted 07-29-2020 12:02 AM

I’d expect that an epoxy with a loss tangent close to that of glass and capable of handling the expected maximum temperature (212º F, since the microwave works by heating the water, and the latent heat of vaporization would regulate the temperature), so that would probably work. Loss tangent is a measure of the transmissibility of energy through a dielectric substance. Personally, I’d just buy a new turntable. If you glued it and it broke, it would break at the most inopportune time possible.

-- Steven.......Random Orbital Nailer

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Kazooman

1540 posts in 2834 days


#7 posted 07-29-2020 12:29 AM



I d expect that an epoxy with a loss tangent close to that of glass and capable of handling the expected maximum temperature (212º F, since the microwave works by heating the water, and the latent heat of vaporization would regulate the temperature), so that would probably work. Loss tangent is a measure of the transmissibility of energy through a dielectric substance. Personally, I d just buy a new turntable. If you glued it and it broke, it would break at the most inopportune time possible.

- Dark_Lightning

Oops, microwave ovens do not just heat water. Google “microwave oven” for more details. Oils and fats, for example, can get much hotter. You can easily make well cooked bacon, or overly browned bacon, or frankly burnt bacon in a microwave oven, You cannot prepare any of these by boiling raw bacon in water at 212 degrees F.

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Dark_Lightning

4209 posts in 3991 days


#8 posted 07-29-2020 09:09 PM


I d expect that an epoxy with a loss tangent close to that of glass and capable of handling the expected maximum temperature (212º F, since the microwave works by heating the water, and the latent heat of vaporization would regulate the temperature), so that would probably work. Loss tangent is a measure of the transmissibility of energy through a dielectric substance. Personally, I d just buy a new turntable. If you glued it and it broke, it would break at the most inopportune time possible.

- Dark_Lightning

Oops, microwave ovens do not just heat water. Google “microwave oven” for more details. Oils and fats, for example, can get much hotter. You can easily make well cooked bacon, or overly browned bacon, or frankly burnt bacon in a microwave oven, You cannot prepare any of these by boiling raw bacon in water at 212 degrees F.

- Kazooman


Fair enough. I for one wouldn’t liked boiled bacon. :^D I hadn’t considered heating anything other than water or water-containing products when I posted this.

-- Steven.......Random Orbital Nailer

View Smitty_Cabinetshop's profile

Smitty_Cabinetshop

16938 posts in 3500 days


#9 posted 07-29-2020 09:22 PM

ebay.

-- Don't anthropomorphize your handplanes. They hate it when you do that. - OldTools Archive -

View MrUnix's profile

MrUnix

8239 posts in 3081 days


#10 posted 07-29-2020 09:25 PM

Fair enough. I for one wouldn t liked boiled bacon. :^D I hadn t considered heating anything other than water or water-containing products when I posted this.
- Dark_Lightning

I can confirm the bacon statement – I make bacon in the microwave all the time… if you leave it in a bit longer than you normally would, it comes out really crispy (after cooling) and easy to break into bacon bits for salads and stuff. It is also much less greasy than what you wind up with frying in a pan.

Cheers,
Brad

-- Brad in FL - In Dog I trust... everything else is questionable

View LeeRoyMan's profile

LeeRoyMan

1422 posts in 609 days


#11 posted 07-29-2020 09:39 PM

I’ve done a ton of UV gluing glass.
(In fact Friday I should be getting the glass for a case I’m going to glue together for David Copperfield.)

When I start the case, I will glue a couple of scraps and put them in the microwave to test.
I think it would work. Better than epoxy I expect.??
UV turns into a hard plastic like material when it is cured. (Picture polycarbonate material)
Hard as hell to cut with razor blades.

Although, even if it does work, it wouldn’t be cost effective for you to buy the UV glue and curing black light.

As said above, thrift stores or just order a new one from amazon or wherever. Or try the epoxy and see what happens, you never know until you know…..

View ibewjon's profile

ibewjon

2071 posts in 3675 days


#12 posted 07-29-2020 10:29 PM

There are small kits of UV glue and light for less than $10 near some check out counters.

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