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Gold Prospecting
Do It Yourself (DIY) Projects
DIY 3 tray dry blower
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<blockquote data-quote="Custard" data-source="post: 676350" data-attributes="member: 15401"><p>Thats for constant air. I was told 25mm holes approx 3 - 5 mm apart kissing the upside edge of your riffle.</p><p>For anyone doing it i found the best was to use a spade bit, go half way through all holes, then turn over and come from the other side. No blow outs and beats hole saw for nicer hole and no spending ages getting plugs out of bit.</p><p></p><p>also see Nightjar's comments</p><p>Post in thread 'Bellows Dry Washer Build' <a href="https://www.prospectingaustralia.com/threads/bellows-dry-washer-build.33330/post-536277" target="_blank">https://www.prospectingaustralia.com/threads/bellows-dry-washer-build.33330/post-536277</a></p></blockquote><p></p>
[QUOTE="Custard, post: 676350, member: 15401"] Thats for constant air. I was told 25mm holes approx 3 - 5 mm apart kissing the upside edge of your riffle. For anyone doing it i found the best was to use a spade bit, go half way through all holes, then turn over and come from the other side. No blow outs and beats hole saw for nicer hole and no spending ages getting plugs out of bit. also see Nightjar's comments Post in thread 'Bellows Dry Washer Build' [URL]https://www.prospectingaustralia.com/threads/bellows-dry-washer-build.33330/post-536277[/URL] [/QUOTE]
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Gold Prospecting
Do It Yourself (DIY) Projects
DIY 3 tray dry blower
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