engineering question

[Elliot Howells]

Quick question, I need to drill out a deep wall socket slightly so that it engages with the hex on the DLE111 prop driver, I've managed to dill a few mm, but it's so hard, the drill won't go any further - any suggestions? I only need another 3mm depth.

TIA, Ell.

[Keith]

Hi Ell, u need a cobolt drill! What size as i have some and younare welcome to what you need.

Keith

[Elliot Howells]

Keith, that's really kind, I need a 10mm, never needed anything but HSS before...

Ell

[Keith]

Ill check in the morning, but i dont think i have 10 mm.

[Chris Bowles]

Hi Elliot, when we had to drill broken studs, that had hardened, we found masonary drills worked very well, slow speed, oil and quite a bit of pressure on the drill, you don't get an exact size hole, but it might suit your needs
best of luck Chris

[Barry_Cole]

You can get them here I think:-

https://www.ukdrills.com/

BC

[Keith]

Hi Ell sorry the largest i have is 5 mm.
Keith

[Barry_Cole]

And from here:-

https://www.screwfix.com/p/dewalt-hex-s ... 33mm/7459v