Odd, I have drilled out hundreds if not thousands of undersized holes in
boards (down to my last 25 boards after 3 years)
It was my first pcb design and I screwed that up, never occurred to me
that there were different sized leads on that first one.
Anyone lubing there bits and tools prior to cutting?
Also, are you use some sort of cooling?
I use compressed air when working on boards.
I have used 2 HSS bits over all that time, never noticed them dull much
more than any tool I may work with on polycarb or acrylic.
I find it dulls far less than working on ferrous metals, and less than
non-ferrous as well.
I am a college and real world trained silver(metal)smith since 89.
I have always been really conscious of tool sharpness
Worst material I have found so far to work with, industrial ceramics.
EATS tools. nam nam nam.
On 12/22/2012 11:54 AM, AlienRelics wrote:
> Ask anyone who has tried to drill out a PCB using standard high speed steel drill bits, or tried to mill a PCB with a high speed steel engraving bit.
>
> If cutting on a tablesaw, I'd strongly recommend a carbide tipped blade. For drilling and milling, again carbide.
>
> Steve Greenfield AE7HD
>
> --- In Homebrew_PCBs@yahoogroups.com, Corey Minion <csminion@...> wrote:
>> Why would fiberglass dull blades any faster than yellow or red brass or
>> any other metal for that matter?
>>
>> If you want to cut boards on a tablesaw, I would recommend a plastics
>> and phenolics ready triple chip grind neg rake blade such as this one
>> <
>> http://www.toolstoday.com/p-5968-industrial-quality-plastic-cutting-saw-blades.aspx?variantids=10261,0&
>> >
>>
>>
>> On 12/21/2012 12:24 PM, Mars Bonfire wrote:
>>> I have the equivalent bench shear from Gizzly Tool...but in the 8" size (Grizzly didn't seem to carry the 12" anymore). Looks almost identical to the enco with a somewhat different design for the hold down.
>>>
>>> If it is the same quality as the Grizzly, it is a great tool. I use it to shear everything from 1/8 plate down through 0.01" brass
>>> shim stock. The blades are hard and easily removable for resharpening which should be a snap. It should cut PCB like butter though I hate to dull the blade cutting glass fiber. For cutting PCBs are other plastics I use a Freud Diablo non-ferrous cutting 10" blade on a table saw (carbide, 80 tooth as I recall) it has a very interesting tooth profile and a low, if not negative "hook". Cuts plastic and aluminum plate like butter...virtually no burrs.
>>>
>>> Steve
>>>
>>>
>
>
>
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