Drill Bit

[kujawski]

I have a garage made from concrete blocks, and am having a problem drilling holes in the concrete blocks (to put up shelves etc etc) normal masonary drill bits are just over heating and not getting very far, any ideas on which type to use?

the actual blocks are set from concrete made with largish stones/pebbles in them, which are giving the drill bits a hard time.

[heathfield]

Even with diamond bits you could have a problem with the bit slipping past the pebbles, putting the hole out of line.
Could you perhaps drill into the mortar between the blocks and fix wooden studding to the walls, then put up the shelves on the studding?

[kujawski]

Thanks for that, i'll get a diamond tipped bit, and see what happens, if not then i'll try heathfields method.

cheers

[gasman]

It is the high speed of the drill that makes the bit overheat and useless. Try a low speed and fresh GOOD QUALITY drill bits. Or hire an SDS drill and a SDS bit for the day. A diamond bit will also overheat and you will be wasting you're money

[raysparx1]

As gasman says the easiest way to drill into concrete is with an sds drill, the harder the concrete the easier they go in, just don't lean heavily on the drill just hold it lightly and the drill does the work,

[gucciman]

we have the same problem when drilling through the walls of council properties in the birmingham area, they too are made from concrete with large stones in which deflect the drill bits, on one job we ruined 2 bits and then had 2 go and buy another one to finish the job, those walls are a nightmare!