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What size drill bit do I need for a 1" bulkhead?


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The tanks drilled by people in Youtube videos seem to use a 1" bulkhead on drilled aquariums. I'm wondering if the diamond hole saw drill bit should also be 1" or if it needs to be larger. They're expensive so I don't want to buy the wrong ones! Does anyone know what size Cory uses in the old video where he's drilling 20 gallon tanks for his fish room?

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3 hours ago, Fishdude said:

The tanks drilled by people in Youtube videos seem to use a 1" bulkhead on drilled aquariums. I'm wondering if the diamond hole saw drill bit should also be 1" or if it needs to be larger. They're expensive so I don't want to buy the wrong ones! Does anyone know what size Cory uses in the old video where he's drilling 20 gallon tanks for his fish room?

The bulkhead manufacturer should provide the relevant information on what size hole is needed. I have bought mine from BRS and their webpages show what size hole is needed for each size bulkhead they sell.

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2 minutes ago, Brian said:

I agree.   I have found the purchase price (for the most part) equates to a slightly better bit.   Sometimes the give guidance on approximately how many holes can be drilled. Good luck. 

I'm going to stick with Cory's guidance of drilling about 8-10 tanks per drill bit once I get the hang of it.

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