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Metalworking (rec.crafts.metalworking) Discuss various aspects of working with metal, such as machining, welding, metal joining, screwing, casting, hardening/tempering, blacksmithing/forging, spinning and hammer work, sheet metal work. |
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d bit cutters
Hello everyone
I'm twistdrill from Australia. I'v got a 9" hercus lathe and I would like to make silver steel D bit cutters and possibly a dovetail cutter. I once saw a web site that showed you how to make them but can't remember it and I didn't have the lathe then. Can anyone give me some advice on this matter or point me in the right direction? From the dovetail cutter, what I remember is you drill 4 equally spaced holes into the face of a piece of round silver steel(drill rod)cut out and file the relief angles but that's all I remember. No specific details or angles. Any help or advice would be greatly appriciated with Kind regards Twistdrill |
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On Fri, 27 May 2005 02:00:28 -0700, twistdrill123 wrote:
I would like to make silver steel D bit cutters and possibly a dovetail cutter. I once saw a web site that showed you how to make them but can't remember it and I didn't have the lathe then. Not sure about the dovetail cutter but here's a short article on making D-bit reamers. http://www.metalwebnews.com/howto/d-bit.html Also check the Google archives of this group for discussions of the subject. I remember D-bits being discussed here a number of times in years past. |
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thanks Artemis,thats exactly what I'm looking for.
kind regards Twistdrill |
#4
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You can obtain D cutter material from some of the suppliers of cutter steel.
I've used the cobalt steel D material for some cutters of the larger sizes that I used to work with when making plastic injection molds. This makes the making of a single lip cutter easy. Just turn the tip part to the diameter you want and taper if desired to the shape you need. Then put the cutter on the cutter grinder or other grinding tool that you may have available and grind the majority of the back of the D down a thou or so and lead that smaller diameter right up to the cutting lip with a straight section from the inner diameter to the point of the cutting edge. If you're doing a rounded cutter, you want to do this all the way to the bottom of the cutter. If you have a flat bottom cutter, you want to do a few (two-three) degree angle on the cutter bottom so that the cutting lip is the lowest point on the cutter and the rest of the bottom is a gentle slope up from the bottom and there is relief behind the cutting tip. -- Why isn't there an Ozone Hole at the NORTH Pole? |
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