Drill bits

[marcros]

Marcross - they'll be posted tomorrow. The P.O. systems are down and they're closed.

Don't make a special trip Phil, if it takes a few weeks I would rather that you and your good lady stay safe. Zero risks where possible.

 

[Phil Pascoe]

They're sharp! I've just used one to drill perfectly clean holes in a plastic pattress box.

 

[redhunter350]

I would be interested to see the grinder.

It’s a Christen drill grinder, acquired in a poor state and re-built from the ground up. Will grind drills from .020” to .250” and with an attachment up to 8mm 5/16”

 

[Phil Pascoe]

Marcross, you have a little surprise on the way.

 

[marcros]

It’s a Christen drill grinder, acquired in a poor state and re-built from the ground up. Will grind drills from .020” to .250” and with an attachment up to 8mm 5/16”
View attachment 100435

I am tempted to blunt some drills to justify that!

 

[TheTiddles]

Cobalt steel drills are lovely and hard, but that makes them more brittle.

I’d go for 7mm HSS jobber drills, I’ve generally found it better to use and throw bits and they will likely be more common (and cheaper) than a fraction smaller.

Aidan

 

[Chippymint]

I would be interested to see the grinder.

Have a look at any of the 6inch grinders forsale with one fine graded white stone wheel or you can use a Robert Sorby Proedge belt sander with a fine grade belt. Note: you don't need a tool rest support when grinding drill bits so get one that can be removed easily - you need to be able to move and twist the drill at accute angles and it is safer not to have the rest in place.