Triple joist

[Sanke]

Hi all
I need to drill 2 x20mm hols through a triple joist. What is the best tool ? I was thinking of an auger bit on my sds but not sure
Thanks

 

[TomLane]

Sharp auger bit would do the job!

I'd use a corded drill rather than cordless, make sure it's not on hammer too! ;-)

Make sure the hole location & sizes are within regs too!

 

[stevetheplumber]

Auger or spade will do the job bit the difficulty is getting the drill in between the joists for that you need a decent sized angle drill augers are better as they pull in so dont need a much force but the lose there edge very quickly

 

[Ermintrude]

*******. Brace and bit and blunt rusty flat bit . Nice Irwin blue speed auger . Mind the nails tho.

 

[Best]

Angled drill def the only drill to use - nice level holes through the joist for pipes especially.
And use auger bit for speed & a clean hole, although if you want to avoid splintering the far side of hole - either stop the drill when you can see the point of the auger bit appearing & start from that side or have a piece of wood against the far side.
Use stubby auger bits for most jobs. You can buy cheap sets of augers which are decent quality if you don't abuse them or hit knots, nails, walls etc.

 

[solutions]

I have put my hex ended auger bits in my impact driver before to get in a tight spot litterely chews through joists like a beaver.

 

[Howsie]

And ruins the impact after a while. Handy when stuck though.

 

[sheff paul]

Hi all
I need to drill 2 x20mm hols through a triple joist. What is the best tool ? I was thinking of an auger bit on my sds but not sure
Thanks

id use my new ''kick bum'' makita bhp 458 rfe 18v cordless with a 22 zip bit and a zip bit extension, Film it and sell it to Makita for a future advert

 

[antdad]

A 20mm flat bit with a bit extension for three quid.

Flat Bit 300mm Extension | NoLinkingToThis

 

[mike-c]

A 20mm flat bit with a bit extension for three quid.

Flat Bit 300mm Extension | NoLinkingToThis

I have one of those. Always safer to put a quick wrap of insulating tape around the Allen screws after you've tightened them as the vibrations whilst drilling can sometimes cause them to work loose and fall out.