looking for best step / cone cutter for using on 18th edition consumer units

[Timbo]

Got a set of 3 Milwaukee step drills. Only got them 'cos they were on a great offer. But they are good!

 

[WallaceP]

If I’m doing a lot of holes I will get a smaller hole saw then take to size with a cone cutter,

 

[Lister1987]

I've got a set of cheapo step drills from small stuff to bigger stuff (25-32-40), managed to file the stem down enough to fit in my drill now, happy days, just need to go slow with it. Didn't want to but needs must ?

 

[pirate]

I'm with the hole punch brigade on this. Used a 20mm on a metal shed the other day and it was so easy, no drama, took less than 1 minute, and the "slug" will make a useful washer for something...

 

[Vortigern]

Whats the point of a punch when you have to drill anyway?????

 

[pc1966]

Whats the point of a punch when you have to drill anyway?????

• Cleaner hole edge
• Less swarf flying around
• Sometime you have an existing hole too big for a hole saw you need to extend
• Can be used in some cases where you have insufficient access for a big enough drill for a hole saw (for larger sizes really).

 

[DPG]

Whats the point of a punch when you have to drill anyway?????

Try one and see the clean edge it leaves.

 

[davesparks]

Whats the point of a punch when you have to drill anyway?????

For general installation work not much really

For making an existing hole bigger, especially when you need it to be off-centre to the existing hole they are good.

Also they give a more accurately sized hole of you are mounting connectors, buttons, indicators etc into something.