Tank drilling bit

[badlands25]

Does anyone have a bit that I could use? I need to drill 2 holes in a plexiglass fuge that I am repurposing into an Algae Turf Scrubber. Also need to drill a 40 b. If no one has one where could I buy one locally without getting raked over the coals? Thanks. Chris

 

[stingythingy45]

Does a carbide or diamond bit work on plexi as well?

 

[JohnK]

Nope, you'd ruin the bit.

Regular holesaws for wood work on plexi. Just need to run water on it to keep it cool, or go a very little at a time with cool down times in between. You can go through in one shot without water, but the material will melt some leaving a slightly messy hole, unnecessary stress to the material, and a bit with melted plastic stuck to it. Also, if at all possible go in from both sides. That way it comes through cleaner. (remember, this is a regular wood holesaw with the pilot drill in the center so it's super easy to line it up from both sides)

 

[JohnK]

Does anyone have a bit that I could use? I need to drill 2 holes in a plexiglass fuge that I am repurposing into an Algae Turf Scrubber. Also need to drill a 40 b. If no one has one where could I buy one locally without getting raked over the coals? Thanks. Chris

What size holes?

 

[badlands25]

What size holes?

1" 1/2 bulkhead. Probably should've mentioned that in initial post eh!

 

[JohnK]

1" 1/2 bulkhead. Probably should've mentioned that in initial post eh!

ABS or Sch80 heavy duty? (the actual hole size is different)

 

[Acan Sam]

I Run hole saws in reverse when cutting through plastic. so it doesnt catch and break the plastic. And plenty of water.

 

[reefstarter]

yep to last post , also use a fine toothed hole saw . wood ones tend to be a bit too aggressive for plastic and def will jump on you either cracking or severely scratching the area around the hole . go very slow and apply firm pressure to the bit but not to much let the bit do the cutting not your arm