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Drill hole in plastic thermostat cover

I need to install an alarm inside a Honeywell TG512A 1009 Universal Thermostat Guard (plastic case). The alarm has a small speaker that is approx. 2" in diameter. I would like to cut a hole that is about 2" in diameter that would be coincide with the alarm speaker. What would be the best way to cut the hole? I need to do this to about 100 units. I have a drill press and can easily build a jig to hold the plastic guard in place. Thank you.:)

kentvw
Re: Drill hole in plastic thermostat cover

Hole saw.................

djohns
Re: Drill hole in plastic thermostat cover
kentvw wrote:

Hole saw.................

Yep . Maybe find a way to support the side that you are drilling with a small block of wood underneath to prevent the plastic from flexing .

kentvw
Re: Drill hole in plastic thermostat cover

Ah ha!........... just noticed the .edu LOL.

I use this companies products for covering fire alarm pull stations in schools and retail spaces. I don't know how "comitted" you are to your project so thought I'd throw this out there.

http://www.sti-usa.com/similarproducts.asp?mode=list&Page=2&PartNo=SS-2060F

Re: Drill hole in plastic thermostat cover

Thanks. I will check the site out. I will look for a dealer.

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