28mm SDS plus drill bit?

[capitanpugwash]

Hi

Anyone know where you can get reasonable priced 28mm SDS Plus drill bit? Only used for the odd sleeving for 22mm through a wall but cannot find one under £45? Screwfix do some reasonable ones up to 25mm but dont stock anything bigger in Titan or Erbaur.

Anyone know best place to look?

Cheers

 

[SimonG]

Bought a 30mm one from toolstation a fortnight ago, spot on.

 

[SimonG]

Toolstation > Power Tool Accessories > SDS Drill Bits > SDS plus Masonry Drill

 

[capitanpugwash]

Blimey that's cheap. Thanks a lot!

 

[tamz]

If it is to be used for drilling std 11" walls use 1 of these with the 300mm arbour.
Change the stars for screw fix dot com
http://www.*************/p/erbauer-tct-core-drill-bit-30mm/72638
You don't really need the pilot drill.
Much quicker than a cheap SDS bit.
Btw you will need a 30mm drill bit for a 28mm pipe.

 

[capitanpugwash]

Cheers Tamz

I'm guessing that'll make it less likely that you blow the brick face off when drilling from the inside with this one too...

 

[tamz]

It still blows a bit off especially on facings but they are good wee bits.

Better to drill an 8mm pilot hole from inside then drill from outside with bigger bit

 

[WHPES]

You get what you pay for. A cheapy will wear out quicker than a Hilti.

Decent ones can be resharpened time and time again for about £2 a go and as such can last for many years. My 19mm Hilti has been resharpened about 8 times over the years and will last a bit longer yet.

 

[stevetheplumber]

anything over 25mm i use the core drills less mess and no breakout

 

[adam84]

we would never usualy use sds over 25mm although we use a 32mm sds max bit occasionaly for plant equipment anchors and such in reinforced concrete, the core drill is much neater though it can take longer and create large amounts of dust depending on the material drilled.

 

[GQuigley67]

i would use a diamond core cutter instead of the sds bit

 

[SimonG]

Through standard wall construction I would agree, but I tend to use the sds as most the walls I drill through are double stone rubble filled. Tends to jam core drill, much quicker to pilot with ten, run through with 22 from both ends and finish with 30 from both ends as well. When coring for wastes I tend to use a 5" inside so I can clear away the rubble, finish through to external with 2" and then make good. Especially at heights.