goodoutdoors
off to a rocking start
Member since September 2024
Posts: 2
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Post by goodoutdoors on Sept 8, 2024 10:40:01 GMT -5
![]()  Hi I wore holes in 2 of my ar12 lids. I happened to have a flat piece of 1/4 inch rubber.. I cut a circle and glued it to the inside of the lid with gorilla glue. Seems to work well. Did about 7 batches so far. I glued rubber on 2 lids. The 1st lid with the rubber is for step 1 and 2 I think is the steps that really wear out the lid as the rocks are at their roughest. The second lid with the rubber is for step 3 And I have a new lid with no rubber for the final polish step. If I can figure out how to post pictures I will |
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Post by RickB on Sept 8, 2024 11:28:24 GMT -5
![]() Hi I wore holes in 2 of my ar12 lids. I happened to have a flat piece of 1/4 inch rubber.. I cut a circle and glued it to the inside of the lid with gorilla glue. Seems to work well. Did about 7 batches so far. I glued rubber on 2 lids. The 1st lid with the rubber is for step 1 and 2 I think is the steps that really wear out the lid as the rocks are at their roughest. The second lid with the rubber is for step 3 And I have a new lid with no rubber for the final polish step. If I can figure out how to post pictures I will Welcome to the board. I captured the photo in the link you posted in the Shoutbox at the bottom of the board.  |
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goodoutdoors
off to a rocking start
Member since September 2024
Posts: 2
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Post by goodoutdoors on Sept 8, 2024 21:13:53 GMT -5
![]() Hi I wore holes in 2 of my ar12 lids. I happened to have a flat piece of 1/4 inch rubber.. I cut a circle and glued it to the inside of the lid with gorilla glue. Seems to work well. Did about 7 batches so far. I glued rubber on 2 lids. The 1st lid with the rubber is for step 1 and 2 I think is the steps that really wear out the lid as the rocks are at their roughest. The second lid with the rubber is for step 3 And I have a new lid with no rubber for the final polish step. If I can figure out how to post pictures I will |
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chaosdsm
starting to spend too much on rocks
Member since April 2024
Posts: 162
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Post by chaosdsm on Sept 9, 2024 12:17:15 GMT -5
Is that foam rubber, or a solid rubber? Foam rubber won't last very long, while a solid rubber should hold up to a lot of abuse. Ideally you want a solid rubber that's between 60A & 90A durometer. As a point of reference, a typical automotive tire will have a durometer of between 70A & 80A depending on intended use.
Below 60A, the rubber can be torn by rock movement, above 90A, you're reaching a hardness level where the grit & rocks will start to easily abrade the material, though there are urethane rubbers up to 100A that have excellent abrasion resistant properties like those used in skateboard wheels.
And if anyone is wondering: durometer is a measure of hardness used for "soft" materials like plastics, rubber, vinyl, leather, foam, etc...
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