Drill Bits
- Thread starter JAA
- Start date
georgenorth
Well-known member
I recommend these Jamie. Reasonable quality at a reasonable price. Definitely less prone to failure than the proper bargain basement ones.
JAA
Well-known member
That’s what I’ve been using actually!
tim.rose2
Well-known member
UK drills...
ukdrills.com
UK Drills | Professional Drilling Tools & Accessories
UK Drills supplies professional drilling tools and accessories for contractors and DIY enthusiasts. Fast UK delivery on drill bits, power tools, and equipment.
ukdrills.com
georgenorth
Well-known member
Tritim230
Well-known member
I use Hilti TE-CX 8/27 and buy new off EBay at a fraction of Hilti's price. Work perfectly for capping and bolting. Particularly in the hard dolomite we have to drill through. And a very good lifespan.
Last batch I bought worked out at £18.40 each.
I have a few (4 to 5) too many, so if anybody would like some please DM me.
Last batch I bought worked out at £18.40 each.
I have a few (4 to 5) too many, so if anybody would like some please DM me.
Chris Curry
Active member
Another vote for Erbauer from me
Relict
Member
bohrer-onlineshop | eBay UK Stores
Wir liefern schnell und zuverlässig Bohrer, Fräser, Sägeblätter, Meißel und Ersatzteile für Maschinen, wie u.a. Anker, Kohlebürsten, Schalter und noch vieles mehr.
ebay.us
I have used this site extensively as it has 8.5 mm bits.
pwhole
Well-known member
I've also found the 8.5mm are better for capping than 8mm as they just give that bit more wiggle room for the rod without it jamming, but is still tight enough to keep the force inside - and that sadly Hilti don't make them. But I've not had any issues so far with the ones shown above. For bolting with concrete screws it's always the Hilti 8mm TE-CX.
PeteHall
Moderator
The other Pete Hall keeps a "calibrated" 8mm washer on his keyring that he can test against 8mm drill bits, as they are all slightly different tolerance.
If the bit fits through, he doesn't buy it, if it doesn't fit it's OK for capping.
georgenorth
Well-known member
I bought a bunch of different drill bits and tested them. The cutter width was pretty much the same with all of them. What seemed to make the most difference was the amount of side relief on the carbide insert. Less relief meant a rounder hole (better for capping).
For what it’s worth, we’ve found the Erbauer x-head bits to be excellent for capping. Good hole roundness, good price and reasonable quality.
For what it’s worth, we’ve found the Erbauer x-head bits to be excellent for capping. Good hole roundness, good price and reasonable quality.
For certain uses I'd recommend 10mm rather than 12mm. It works every time for me, no problem, and less drill power/battery life required. I too have started to use Erbauer (Screwfix's own brand I believe). They are cheaper, but also last much longer than same sized Bosch or Dewalt branded bits which snap all too quickly.
For capping, an 8.5mm bit is better for some types of caps such a proper Hiltis. The older, smaller bore types of caps, are still good in 8mm holes.
That's my 10 penneth
For capping, an 8.5mm bit is better for some types of caps such a proper Hiltis. The older, smaller bore types of caps, are still good in 8mm holes.
That's my 10 penneth
TheBitterEnd
Well-known member
I've used dozens of these bits and they are really good value. I have found that sometimes some of them are a bit bent, from the last batch I bought about 6 out of 20 had a noticeable wobble which can make hole starting a bit more difficult and I think wastes a bit of impact energy. That said at the price, rejecting 6 from 20 still makes them good value compared to others.bohrer-onlineshop | eBay UK Stores
Wir liefern schnell und zuverlässig Bohrer, Fräser, Sägeblätter, Meißel und Ersatzteile für Maschinen, wie u.a. Anker, Kohlebürsten, Schalter und noch vieles mehr.ebay.us
I have used this site extensively as it has 8.5 mm bits.
Tritim230
Well-known member
Drill bit performance may depend on rock type.
In the Forest almost all cave is in dolomite and there is lots of haematite mineralisation (iron ore), which is extremely hard. (Redhouse is the exception where there are long sections of Crease which is beautifully white and much more like Yorkshire/Derbyshire)
I've compared the Erbauer (Screwfix) and Hilti TE-CX and the latter wins hands down. Drilling takes less than half the time.
For me, the trick with loading caps is to ensure the hole is thoroughly cleared of dust. I use 8mm pipe brushes and then use the same tool to push each (Hilti) cap in separately. I have no problems going to the full 270mm length of the bit.
In the Forest almost all cave is in dolomite and there is lots of haematite mineralisation (iron ore), which is extremely hard. (Redhouse is the exception where there are long sections of Crease which is beautifully white and much more like Yorkshire/Derbyshire)
I've compared the Erbauer (Screwfix) and Hilti TE-CX and the latter wins hands down. Drilling takes less than half the time.
For me, the trick with loading caps is to ensure the hole is thoroughly cleared of dust. I use 8mm pipe brushes and then use the same tool to push each (Hilti) cap in separately. I have no problems going to the full 270mm length of the bit.
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