Type of drill to get?

[rewireIT]

Here is a hole punch in parts, dashed line where the metal sheet would be:
View attachment 109221
View attachment 109222

Ahhh now it makes sense. Milwaukee do a version that goes in a cordless device that does the punching for you nut knowing them it'll be about 300 quid. EDIT 300 quid? Jesus H Christo it's £1100.

So I'm presuming you just tighten the nut and it cuts through?

 

[oscar21]

I bought a hole punch years ago for cutting a tap sized hole into a stainless steel sink, I lent it a plumber the other year who was mesmerised by it and said it was the best thing he has ever used, never really thought about them for 20 or 25mm holes, I just use a hole saw or step cutter.

As for using impacts for joist drilling, why would you not use a cordless angle drill? perfect tool for the job.

 

[loz2754]

Using an impact for joist drilling is best when using the Bosch blue self pulling spade bits.
It's noisy yes, but almost effortless.

 

[nicebutdim]

Using an impact for joist drilling is best when using the Bosch blue self pulling spade bits.
It's noisy yes, but almost effortless.

Or wood beaver style bits.

I quite fancy an angle impact driver as my angle drill just about keeps up with joists.

 

[rewireIT]

Using an impact for joist drilling is best when using the Bosch blue self pulling spade bits.
It's noisy yes, but almost effortless.

Those Bosch bits are incredible. Treat timber like butter

 

[oscar21]

Using an impact for joist drilling is best when using the Bosch blue self pulling spade bits.
It's noisy yes, but almost effortless.

I've tried those bosch bits but once the threaded bit goes blunt on the end (which is quite quick) the bit is useless. I use the Dewalt extreme bits which cut just as quick but can be re-sharpened a good few times if you have a bench grinder in the van.

 

[littlespark]

I have the Bosch screw in flat bits too… Used them with a brand new dewalt combi…. 7 holes, and the drill went up in a puff of smoke.
Got a replacement, no quibble.


Reading back the thread, there was a few suggestions for an impact…. Don’t!
Then you won’t be tempted to use it for tightening up mcb terminals!

 

[nicebutdim]

I've tried those bosch bits but once the threaded bit goes blunt on the end (which is quite quick) the bit is useless. I use the Dewalt extreme bits which cut just as quick but can be re-sharpened a good few times if you have a bench grinder in the van.

Bought a set of those Dewalt extreme flat bits for about £11 in a Toolstation offer. Can't fault them as spade bits go.

 

[pirate]

I like that we can call them that, without fear of reprimand!

 

[littlespark]

I like that we can call them that, without fear of reprimand!

Spade?

How do you confuse a plumber?

Show him three spades and tell him to take his pick.