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Old 29th March 2012, 01:40 PM   #5731
Turbon is offline Turbon  Sweden
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Don't you think Granite is to hard (ringing). The lenco guys are found of slate for their projects which I think is quite hard as well. Anyone who considered soapstone?

I'm looking for a cheap lump of it and will let you know of my findings in a few months.

Brgds
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Old 29th March 2012, 02:11 PM   #5732
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I think a nice copper plate is still the optimal choice for the actual base plate of the assembly. Attaching it to a heavier slate or corian type block - either hard coupled or soft coupled - might be the way to go.
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Old 29th March 2012, 04:03 PM   #5733
syklab is offline syklab  Hong Kong
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Hi,
What is the best way to drill on copper slab? I only have hand electric drill and a battery drill. Any special drill bit? I want to mount the laser drive on a half inch copper slab and sit on some industrail vibration absorbing rubber mat glue to the base of the chassis.
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Old 29th March 2012, 04:08 PM   #5734
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Quote:
Originally Posted by syklab View Post
Hi,
What is the best way to drill on copper slab? I only have hand electric drill and a battery drill. Any special drill bit? I want to mount the laser drive on a half inch copper slab and sit on some industrail vibration absorbing rubber mat glue to the base of the chassis.
no special drill bit. any HSS drill bit can do the job.
i just done mine. 6mm copper base, drilled using handheld electric drill.
Click the image to open in full size.
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Old 29th March 2012, 04:16 PM   #5735
syklab is offline syklab  Hong Kong
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Quote:
Originally Posted by commstech View Post
no special drill bit. any HSS drill bit can do the job.
i just done mine. 6mm copper base, drilled using handheld electric drill.
Click the image to open in full size.
Do u use any coolant or lubricant while drilling?
My stop at the middle and just make sound but noy getting thru.
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Old 29th March 2012, 04:23 PM   #5736
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no i did not use any coolant or lubricant at all.
to drill a large hole, i usually started with smaller ones and work my way up. never been a problem for me and i am using a 20yr old handheld drill left to me by my late grandpa.... not kidding.
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Old 29th March 2012, 04:24 PM   #5737
TheGimp is offline TheGimp  United States
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Soft alloys and metals like copper are best machined with a very sharp tool (drill bit), high cutting speed (high rpm for a drill), low feed rate (light pressure on the drill), and coolant. For copper and aluminum, WD-40 works well.
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Old 29th March 2012, 04:40 PM   #5738
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Go slow and use water or cutting lubricant. If your drill bit is too hot to touch, you aren't using enough lubricant. Larger drill bits are less of a problem as they can sink away more heat. Small diameter bits can be easily overheated if they are run too fast or with too much pressure. If the bits get overheated they can lose their temper and become dull quickly.
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Old 29th March 2012, 05:01 PM   #5739
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Most likely the drill bit is blunt.


I keep coming back to thinking about using a clay base. A local Potter could easily enough make and fire it, plus you can get glazed too.

Anyone know about the original shigaraki clay?


Fran
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Old 29th March 2012, 05:10 PM   #5740
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Says ceramic here

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