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What is the Name of the Opposite of a Rubber Grommet to Protect an OD Edge?

09/01/2023 6:12 PM

I'm looking for a 2" dia rubber grommet that will protect the outside edge of a round disk of glass, or a lens, to keep it from chipping if dropped. All I find under "grommet" is for protecting the inside edge of a hole. Am I using the wrong term?

I need an intact ring, not a cut to length strip.

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Pathfinder Tags: edge protector Grommet lens
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#1

Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/01/2023 9:20 PM

You mean like a lens ring...?

On the other hand you might be able to heat these and turn them inside out... confidence level low...

https://www.amazon.com/Grommet

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#2

Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/01/2023 9:54 PM

Am I using the wrong term?

Maybe "2 inch reverse grommet lens edge guard".

Like this?

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#3
In reply to #2

Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/01/2023 9:59 PM

Yeah found this...

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#5
In reply to #3

Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/01/2023 10:15 PM

Thanx SolarEagle. Similar but lower profile and stretchy. But apparently they are called Reverse Grommets, so now I can do a proper search.

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#7
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Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/02/2023 5:40 AM

What about some heavy duty 2 inch heat shrink wrap.....or bicycle tube? ....or perhaps a combination of the two...cut to size

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#8
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Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/02/2023 6:03 AM

GA

If you go for heat shrink, it's probably best to look for adhesive lined heat shrink.

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#10
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Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/02/2023 10:47 AM

Bicycle tube is a possibility depending on dia. Good idea. I'll look into that as well.

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#11
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Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/02/2023 9:58 PM
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#12
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Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/02/2023 11:30 PM

Well, there's a skinny one. For $6.99 it might be worth trying. I'll mention it to the team.

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#4
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Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/01/2023 10:11 PM

Similar to that, thanx. That's a bit too heavy duty. I'm guessing a fairly firm durometer. I need something probably stretchy that fits on that way instead of threads into place, as these seem to do. But now that I know they are called reverse grommets, I should be able to track one down.

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#6

Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/02/2023 3:41 AM

If you can't find what you want: how about 3D printing a thermoplastic elastomer?

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#9
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Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/02/2023 10:42 AM

Interesting. That's a good idea. TBH I didn't know you could print elastomer. I do have a printer. Although I'm going to first continue looking for a little longer.

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#13

Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/03/2023 10:00 AM

Dip the end of the glass into RTV Silicone solution, one or more coats.

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#14
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Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/04/2023 6:36 AM

GA

OR

Dip the end edge of the glass into liquid latex, one or more several coats.

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#17
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Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/04/2023 1:21 PM

Thanx Randall. I consider all possibilities.

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#15

Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/04/2023 8:42 AM

Probably a title on the thin side for your application, but you might investigate the edge covers for dog tags. These are commonly called tag silencers. 2” dia may be the deal killer here.

Another search Avenue is a key cap - the plastic ring available for the head of a brass house key. The largest of these I can recall fit 1.5” dia, but there are bigger key heads out there (e.g. hotel keys, or those intended for arthiritic users), so you might find larger cap rings.

Just thinking outside the box.

Regarding the post title: Dunno what the shape is called. Not-A-Grommet?

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#16
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Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/04/2023 1:20 PM

That's a possibility. Thanx.

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#18
In reply to #16

Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/07/2023 11:07 PM

O-ring or rubber band?

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#19

Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/07/2023 11:20 PM

Edge trim, used to protect sheet metal and car door edges. You normally form it around the edge, you can have one custom molded for your application.

Another possibility is a shaft seal. Or, try a thin wall rubber tube cut to the length you need.

you may need it molded to hold the glass in position during handling.

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#20

Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/08/2023 10:11 AM

Try an I/D grommet turned inside out?

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#21
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Re: WHAT IS THE NAME OF THE OPPOSITE OF A RUBBER GROMMET TO PROTECT AN OD EDGE?

09/11/2023 7:53 PM

Isn't that a rebbur temmorg?

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Al-mentor (1); Brave Sir Robin (1); Doorman (1); John Hadland (1); Out of Box Experience (7); Randall (3); Rixter (1); SolarEagle (4); steve45 (1); yesyen (1)

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