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Old 07-03-2003, 02:07 PM   #1
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Default Carbide Bits

About how many cuts can I expect from a carbide bit before it needs sharpening or replaced?
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Old 07-03-2003, 08:34 PM   #2
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Depends on how deep you make the cuts, if you go very small cuts at a time, it should last for some time, but if you take deeper cuts, it will lose it's shape quickly. Carbide will actually give a better cut than diamond will while the carbide is still new.
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Old 07-06-2003, 02:35 AM   #3
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It also depends on what type of material (how hard, etc) you're cutting, how fast you are cutting, rigidity of setup, etc.

Carbide usually lasts longer than HS, but is also more brittle. Great for hard material, but hates interrupted cuts.

Are you asking about a milling cutter, drill bit or lathe insert?
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Old 07-06-2003, 05:16 AM   #4
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The guys on a Motor forum claim 20 cuts or so on a comm. I find that to be a little low. You can sharpen it with a diamond file (they are cheap). Just be sure to keep the angles the same and NOT round the corners.

A nice sharp bit will leave small pieces of copper all over. A dull one pushes the copper out of the way.

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Old 07-06-2003, 09:46 AM   #5
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Quote:
Originally posted by Sawtooth R/C
It also depends on what type of material (how hard, etc) you're cutting, how fast you are cutting, rigidity of setup, etc.

Carbide usually lasts longer than HS, but is also more brittle. Great for hard material, but hates interrupted cuts.

Are you asking about a milling cutter, drill bit or lathe insert?
We are talking about a lathe to true commutators, nothin big like a mill or anything.
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Old 07-06-2003, 11:39 AM   #6
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Default Carbide Bits

Guys;

Personally I have found about 20+ cuts before the bit needs sharpening/changing. The Copper used in Coms is very soft, but actually abrasive and hard on bits.
I am lucky enough to have a "Green" wheel for my Grinder, so re-sharpening is no problem. A "Diamond" file can be used also.

If you need new Bits, Try 'McMaster Carr' online. New bits are less than $5 apiece. There are several different sizes and styles availible, so order carefully.
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Old 07-07-2003, 12:26 PM   #7
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Lots of info here, thanks guys.
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Old 07-08-2003, 07:16 PM   #8
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Default Re: Carbide Bits

Quote:
Originally posted by popsracer
Guys;

Personally I have found about 20+ cuts before the bit needs sharpening/changing. The Copper used in Coms is very soft, but actually abrasive and hard on bits.
I am lucky enough to have a "Green" wheel for my Grinder, so re-sharpening is no problem. A "Diamond" file can be used also.

If you need new Bits, Try 'McMaster Carr' online. New bits are less than $5 apiece. There are several different sizes and styles availible, so order carefully.
+

whats the site for maccaster carr online ?
have anyone use the Xpress (the same brand that makes the car) lathe machine ??
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Old 07-09-2003, 12:17 AM   #9
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www.mcmaster.com
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Old 07-09-2003, 02:19 AM   #10
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What do you use to sharpen diamond bits?
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Old 07-09-2003, 02:37 AM   #11
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Silicone Carbide, I believe. And if I got it confused with the High Speed wheels; it's a green wheel... I think Aluminum Oxide is the normal wheel.
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Old 07-09-2003, 02:50 AM   #12
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Silicone Carbide, I believe. And if I got it confused with the High Speed wheels; it's a green wheel... I think Aluminum Oxide is the normal wheel.
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Old 07-09-2003, 03:47 AM   #13
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You can buy a dimaond file for just a few bucks too. They work, just keep the angles the same

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Old 07-09-2003, 06:38 AM   #14
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just an fyi.

i recommend checking out that link below for fasteners and raw materials as well.

it's www.mcmaster.com

i happen to be about 30 min from their warehouse. i bet i've spent over $500 there just for the rc cars. their service is awesome and so is their website.
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Old 07-09-2003, 12:21 PM   #15
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Correct seaball, I beleive this is where I will be ordering my carbide bits from for my lathe. $3 a bit is very hard to beat.
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