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#1
08-30-2017, 09:54 PM
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Hard Coral
I am trying to drill through hard corals and neither concrete bit or high speed steel will touch it.....anyone drill really hard coral
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Current Tank Info: 187 custom reef tank, Running ZeoVit with Vibe, Apex New Gen, Jebao DCS 12000 return pump, custom180 Euro-reef skimmer, running Mazzi venturi and mag 18pump, Lighting-2 60" XHO blue reefbrites , with 8x60" T-5, 2 Maxspect Gyre XF150,and 1Maxspect Gyre XF250 Generator with controller, 120 lbs of Tonga Branch rock, custom sump and manifold 
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#2
08-31-2017, 02:14 AM
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Quote:
https://www.homedepot.ca/en/home/p.5...000529505.html
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#3
08-31-2017, 02:38 AM
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A concrete bit will drill through it if you have it on have it on the hammer setting. If you don't want to risk cracking it you would want to use a diamond bit as stated above. What type of coral are you drilling and what size is the hole?
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#4
08-31-2017, 03:04 AM
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used diamond bit, masonry bit wouldn't touch it, thanks for the replies
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Current Tank Info: 187 custom reef tank, Running ZeoVit with Vibe, Apex New Gen, Jebao DCS 12000 return pump, custom180 Euro-reef skimmer, running Mazzi venturi and mag 18pump, Lighting-2 60" XHO blue reefbrites , with 8x60" T-5, 2 Maxspect Gyre XF150,and 1Maxspect Gyre XF250 Generator with controller, 120 lbs of Tonga Branch rock, custom sump and manifold
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#5
08-31-2017, 03:08 AM
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You're drilling coral or rock?
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#6
08-31-2017, 07:14 AM
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drilling very hard coral, some of it is softer!
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Current Tank Info: 187 custom reef tank, Running ZeoVit with Vibe, Apex New Gen, Jebao DCS 12000 return pump, custom180 Euro-reef skimmer, running Mazzi venturi and mag 18pump, Lighting-2 60" XHO blue reefbrites , with 8x60" T-5, 2 Maxspect Gyre XF150,and 1Maxspect Gyre XF250 Generator with controller, 120 lbs of Tonga Branch rock, custom sump and manifold
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#7
08-31-2017, 02:15 PM
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Like Tyfigher said, concrete/masonry bits will work but they need to be used in a hammer drill on the 'hammer drill setting'. The size/brand/quality/condition of the bit and drill makes a difference too. They are however pretty rough/violent and wouldn't be my first choice.
There are bits for drilling through tile as well as diamond coring bits which have already been mentioned.
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"We shall dive down through black abysses... and in that lair of the Deep Ones we shall dwell amidst wonder and glory forever." - H.P. Lovecraft Old 120gal Tank Journal New 225gal Tank Journal May 2010 TOTM The 10th Annual Prince George Reef Tank Tour
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#8
08-31-2017, 04:25 PM
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There are bits for drilling through tile as well as diamond coring bits which have already been mentioned.
This is what I've used
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Current Tank Info: 187 custom reef tank, Running ZeoVit with Vibe, Apex New Gen, Jebao DCS 12000 return pump, custom180 Euro-reef skimmer, running Mazzi venturi and mag 18pump, Lighting-2 60" XHO blue reefbrites , with 8x60" T-5, 2 Maxspect Gyre XF150,and 1Maxspect Gyre XF250 Generator with controller, 120 lbs of Tonga Branch rock, custom sump and manifold
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#9
01-02-2019, 05:33 PM
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Try using a diamond grit tile coring bit, they go as small as 1/4” basically the same bit for drilling bulkheads in our tanks except tiny diameter-wise. Should do the trick just remember to flush the hole with water to keep the core clear and the bit cool.
Edit: methodology of drilling is important. Lubricating the “cut” as well as keeping the drill bit cool. High speed, low feed or low speed high feed. Feed rate = amount of pressure you apply during the cut. If you have tried this already then I guess check geology websites that may have some insights we don’t have.. I’ve seen core samples that have been taken from granite that use a diamond cobalt coring bit and they use a lot of drilling fluid. Try Rapid-Tap, you can get it from Acklands-Grainger
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210 DD mixed reef, 75 gallon sump, SRO 3000, reef keeper, DCP15000 return, 3xAI sol, 250lbs live rock, 45 watt UV feedback loop to refugium, bubble magus doser for the big 3, Liquid carbon dosing. Waiting on a couple gyres.... Last edited by Kobiyashi; 01-02-2019 at 05:42 PM. Reason: Didn’t read entire post...
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