Which Drill Bits Should I Buy?

andrew-b

latecomer wrote: »

:rotfl:

Thats a seriously abused drill bit

yep...but considering the abuse it has got i think it's amazing it's still in one piece and is still capable of drilling a hole in masonry (albeit not as well as it might have when new!)!
Not sure whether it's a good or bad advertisement for B&D piranha drill bits!

Andy

Gambler

jockster211 wrote: »

Just a quick note to say that any drill bit will blunt quickly if used incorrectly (latecomer - I'm not saying you did;) ). My 'lad' took a new deWalt bit & drilled a hole into tile at full speed:mad: , result was one drill bit fit for SFA.

The tougher the material (tile, porcelain, Engineering brick, etc) drill at slow speed, and have a little water to cool the bit down frequently. Result is your bits will last much longer:T .

Jockster

Ah that could be why then, I'm sure I was giving it full beans when I broke them

27col

My house is built of engineering bricks. I tend to go into the mortar joints if I can. Otherwise its got to be my SDS drill. Strangely enough beaker 141, I used a 5mm drill yesterday to spot through the fixing holes of an out door socket that I was fitting for a neighbour. Then enlarged to the 8mm hole required for the wall plug. But no I do not think that there is much call for anything below 5mm.

I forgot to add, that from my own experience and what I have observed. The main cause of ruined masonry drills is due to them being run at too fast a speed. Even the good quality ones do not like high speeds. Also taking them out while drilling and cooling them in water is a great way to prolong their life.

Gambler

jockster211 wrote: »

I do lots of drilling in masonry, brick, tiles, etc. Screwfix do a set of 5 DeWalt bits for under £8. Worth every penny;) .

http://www.screwfix.com/prods/88598/Drill-Bits/Drill-Bit-Sets/Masonry-Sets/DeWalt-Extreme-2-Masonry-Drill-Bit-Set-5-Pc

Jockster

I need to put some alarm boxes up on brick exterior walls, would these do the trick?

Thanks

jockster211

Gambler wrote: »

I need to put some alarm boxes up on brick exterior walls, would these do the trick?

Thanks

Think 'hot knife & butter'. Just one caveat, it does depend on the type of drill you use, I use the 'hammer' setting on my Makita percussion drill. For heavier work then an SDS (as a previous poster said) is needed. I got them mainly for drilling tile/porcelain as its usually a pain in the arris. Got to say they are the best bits I've used to date.

Either way they are a good addition to any toolkit.


Just before anyone asks/accuses me I don't work for DeWalt or Screwfix.

Jockster

ormus

check out my recent thread on SDS drill & bits, from screwfix, for concrete panels.
needed to drill 6 holes in a hi-rise flat, concrete panel.
did the job in seconds.