How to make hole in tarmac drive for bolt?

26 Jan 2009
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United Kingdom
Hi...just had new gate put in. I need to set the bolt tubes into the ground to take drop bolts. The drive is tarmac....what is best way to get 20mm dia. holes 2-3 inches deep? Gate lads did 2 for closed gate..look neat. Do I get big wide drill...or one of those circular cake cutter type things? thanks
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I don't think you can get a 20mm core drill - may be wrong though.
I'd use a 20mm SDS drill bit, which you may have to hire - or get the gate lads back, for a small fee!
John :)
As a side note you could consider fitting sprung 'drop bolt sockets' to stop them filling up with crap.
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Drilling in tarmac alone will be pointless. After the first summer and much waggling about with the gates the holes will end up baggy and useless. You need to cut a section of 'mac out, dig a hole then concrete your tubes in place. Or set in a steel plate with holes drilled in it.

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