Forums
New posts
Search forums
What's new
New posts
Latest activity
Members
Registered members
Current visitors
Charts
Log in
Register
What's new
Search
Search
Search titles only
By:
New posts
Search forums
Menu
Log in
Register
Install the app
Install
Gold Prospecting
Hard Rock Gold Prospecting
Hard rock gold prospecting
JavaScript is disabled. For a better experience, please enable JavaScript in your browser before proceeding.
You are using an out of date browser. It may not display this or other websites correctly.
You should upgrade or use an
alternative browser
.
Reply to thread
Help Support Prospecting Australia:
This site may earn a commission from merchant affiliate links, including eBay, Amazon, and others.
Message
<blockquote data-quote="Harlequin" data-source="post: 492123" data-attributes="member: 1614"><p>Thanks for the suggestion. I do have 3 spare diamond bits so that's not the problem. I didn't realise that quartzite is so hard that is smoothes and polishes the diamonds with the result that they can no longer cut. The solution is to continuously "dress" the bit by rotating it at speed in a bucket of coarse sand. This cleans out the gunk between the diamond edges. The sand I was using was ordinary concrete mix sand. When I return to the site I will be taking 50grit garnet (sandblast grit). I will be also taking a bag of Bentonite to stabilise the drill hole walls. I'm living and learning.</p></blockquote><p></p>
[QUOTE="Harlequin, post: 492123, member: 1614"] Thanks for the suggestion. I do have 3 spare diamond bits so that's not the problem. I didn't realise that quartzite is so hard that is smoothes and polishes the diamonds with the result that they can no longer cut. The solution is to continuously "dress" the bit by rotating it at speed in a bucket of coarse sand. This cleans out the gunk between the diamond edges. The sand I was using was ordinary concrete mix sand. When I return to the site I will be taking 50grit garnet (sandblast grit). I will be also taking a bag of Bentonite to stabilise the drill hole walls. I'm living and learning. [/QUOTE]
Verification
Post reply
Gold Prospecting
Hard Rock Gold Prospecting
Hard rock gold prospecting
Top