On 30/06/2019 07:00, alan_m wrote:
On 27/06/2019 13:59, Tricky Dicky wrote:
By the sound of it your flat bit is probably blunt @ £1.50 for a
replacement seems hardly worthwhile taking a file to it to sharpen.
Alternatively use an auger the screw thread on the tip tends to help
pull the drill through, originally these had a square tapered shank to
fit a brace but these days they come with round parallel shanks for
machine drilling. Just be careful as they cut through quite rapidly
and can easily over drill a blind hole.

Richard


Although not through joists I have used a short auger in a confined
space similar to

https://www.screwfix.com/p/erbauer-s...ails_container


and have used a ratchet drive (smaller car socket set type) on the hex
end of the auger to manually turn/drive the screw into the wood to cut
the hole.


Or

https://www.amazon.co.uk/Amtech-F304.../dp/B0030BZRZO


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