What's the best drill bit?

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5 Jul 2012
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Edinburgh
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United Kingdom
We're looking for a 14mm x 200mm (min) drill bit for masonry. The issue is we're drilling unstable victorian brick walls and can't use the hammer function. We've tried various types of drill bit including the Hilti TE-CX 14/27 but they are not meeting our expectations. Can someone tell us what the best drill bit for such a job is, money is no object!
 
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So just to be clear, could you go thru the process of how you're drilling into the brick?

Before you drill using the 14mm, which smaller size are you using?
 
We're using an 8mm drill bit to create a pilot hole and then a 14mm. Could our drill be the issue...it must be 30 years old! Appreciate any comments and recommendations
 
I've drilled into plenty of Victorian walls with an SDS drill without fear of them falling down, how bad a condition are they in?

In my mind its better to use a powerful SDS and make the hole in seconds rather than spend ages putting pressure on a non hammer bit.
 
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As TheVictorian says, you'll find the ease of use from a quality SDS drill place way less vibration on the brick.

What drill are you using with the drill bit?
 
This is great, the drill we have is a conventional hammer drill but is so old any id marking have been rubbed off....time for an investment in a SDS drill...any recommendations?
 
An SDS will blow the back of the brick off.
 
The drill must be an issue instead of the Bit,as you said you have used Hilti bits there are not many bits better then that
of you are really worried then use a Bosch percussion drill,this is not as fierce as a SDS
 
If you do not want to use the hammer action, which is inherent to the best use of an SDS drill, have you considered a wet diamond core bit system, say from Marcrist, which will be effective with minimal breakout, although by no means cheap.
 

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