[Shop-talk] Drilling holes in sheet metal

[Nick Brearley]

Chris Kantarjiev wrote:
>
> I'll second that - I have a set of these (then called Rotabroach, but 
> the same item) and they're really great. Not sure they work as well as 
> a unibit on some materials - I have both. The unibit gives a wider 
> range of sizes, but won't work on thick stuff. The rotacut can wander 
> a bit.
>
>
Important to centrepunch the hole well and keep the Rotacut centreguide 
sliding freely. A little cutting oil works wonders. The fullsize 
Rotabroach machine is a very impressive piece of kit when you see it 
clamped in the middle of a large sheet cutting a two inch hole effortlessly.