Hi
I've had some trouble drilling into my walls using an 850watt Bosch Hammer Drill with brand new high quality masonry bits. Its a pretty hefty thing and makes a lot of noise when hammering but not a lot of depth to show for it. I thought I'd hit some steel or something else impenetrable. They're only 6mm holes (for some shelving units) but I couldn't drill more than 10-15mm depth.
I recently had some new windows fitted and asked one of the guys if he could have a go and see if he could finish off the holes I started. His drill went into my walls like a hot knife through butter! His drill was much smaller than mine, ran on 110v from a stepdown transformer and used SDS bits. He said it was to do with the hammer action - maybe it was pneumatic?
Is this correct? Is it possible to get an electric drill with a pneumatic hammer action?
Any idea why his smaller drill was so much more effective? Was it the SDS bits? Was it the length of the bits?
I'm baffled.
Thanks
Rob