rubber grommets

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watsupbud

Active Member
Can anyone find a chart for grommet and drill sizes? I cant seem to find it? Does anyone know the drill bit size i should use for a rubber grommet that is 5/8? 3/4? and 1/2 off the top of their head?
 
wpuckw

wpuckw

Member
if it were me i would start small and if its too small go a little bigger but generally whenever I drill a hole for whatever application I want the drilled hole to be slightly smaller than whatever I am putting in there screw... so the threads have something to bite on... this application is probably going to need to be water or air tight i assume.... thats my suggestion just a tad smaller
 
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snocat

Active Member
I can tell you this,I bought some gromets and on the package it said what bit size to use,so I did and the hole was way to big to be water tight so I had to step down 2 sizes,the best thing to do is to try the bit out on a scrap piece so you dont ruin a tote like I did
 
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northernfarmer

Member
I use calipers to gauge the panel grove depth on the grommet, then from that check the bit size. Just be careful to not squeeze the grommet. For my 1/2" ID GH grommets, I use a 7/8" flat bit.
 
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watsupbud

Active Member
james2719 said:
I use these http://www.aquaticeco.com/subcategories/829/Uniseals
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So the holesaw size is perfect for the uniseals? because i know some grommets u gotta start like 2 size smaller for drilling holes even tho it says a certain size. for example: for the u050 part; it says for 1/2 pipe sz, it says 1 1/4 hole sz. so if i drilled a 1 1/4 hole its pretty much perfect? but when i look down at the next part for a 3/4 pipe size its the same hold size as the 1/2 which is 1 1/4? which one did u use
 
J

james2719

Member
watsupbud said:
So the holesaw size is perfect for the uniseals? because i know some grommets u gotta start like 2 size smaller for drilling holes even tho it says a certain size. for example: for the u050 part; it says for 1/2 pipe sz, it says 1 1/4 hole sz. so if i drilled a 1 1/4 hole its pretty much perfect? but when i look down at the next part for a 3/4 pipe size its the same hold size as the 1/2 which is 1 1/4? which one did u use
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I use the 1" uniseals from this site. The hole I drill is 1 3/4". These don't leak, Trust me on this. Pay the money and order these. I tried the grommets from hd and they eventually leaked. I see what you mean about the 1/2" and 3/4" showing the same size hole. I'm not sure - I only used the 1" ones. Remember these are the dimensions if your using uni-seals. The grommets at the store might be different.
 
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watsupbud

Active Member
james2719 said:
I use the 1" uniseals from this site. The hole I drill is 1 3/4". These don't leak, Trust me on this. Pay the money and order these. I tried the grommets from hd and they eventually leaked. I see what you mean about the 1/2" and 3/4" showing the same size hole. I'm not sure - I only used the 1" ones. Remember these are the dimensions if your using uni-seals. The grommets at the store might be different.
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much appreciated bro!
 
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james2719

Member
Hold on - I never even asked what you were using these with. Totes? or Buckets. I use Buckets. .If your using totes you may want to drill a littler smaller hole first because the plastic is soft.
 
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watsupbud

Active Member
james2719 said:
Hold on - I never even asked what you were using these with. Totes? or Buckets. I use Buckets. .If your using totes you may want to drill a littler smaller hole first because the plastic is soft.
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Buckets, do you know if these fittings will work well with pvc plastic piping?
 
GIJonas

GIJonas

Well-Known Member
Uniseals in buckets work flawless. Buy the holesaw prescribed and run you drill in REVERSE. Nice clean hole.
 
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