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My best cutter is ugly


syfre

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They are made from old carbide drills.  These drills come from a uk seller which said they come from "aviation" factories. Don't know. They cut very well and break also very well. The one on the left is the first i made. It's very ugly for a cutter but it cut steel like butter. The second is a cutting tool and have better finish. it required much grinding and was really a pain to make.

To made cutter from carbide drill i use a proxxon bench grinder (SP/E 28030) and finish it with a medium diamond wheel (from eternal tools supplier). 

cutters-745x800.thumb.jpg.fe38334f1f4eb13c8f2ce6671ae2fd2e.jpg

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How often do they chip? I've used some Heller HSS-Co drill bits to make gravers before which were extremely hard.

Yesterday I was turning silver steel. I use a Gloster M3 HSS graver which produces constant ribbons with high carbon steel rod.

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