Rob
Contact me off list [log in to unmask] and I'll send you an
extract from Atlas Copco's manual with all the drill size standards
detailed. The JISCMAIL server wont allow me to send the attachment
Keith
-----Original Message-----
From: mining-history [mailto:[log in to unmask]] On Behalf Of
Rob Ixer
Sent: 02 September 2010 10:50 AM
To: [log in to unmask]
Subject: Drill core dimensions
My mate Olaf now has sent me pictures of orthoststs with circular holes.
In Cornish granite mainly
Are there standard diameters for drill cores?Olaf's holes vary from
5-20cms in diameter. One has a central plug intact.
The stones are large boulder sizes
many thanks
I am trying to have Olaf 'treat' with you directly. (Olaf is/was? a big
animal vet- so cannot resist pun.)
Absolutely no suggestion that anyone on this board is a brute of course.
But he prefers the postal service and off-colour photos.
All help very welcome.
cheers
Rob
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