This is some sort of device that you screw onto a bench with unusual angle markings, a hold down screw and a possible angled blade . It must be something fairly straightforward as it has the Craftsman name on it. Guesses?
I believe it's a drill bit grinding jig that's missing a part. The pointed piece of spring steel visible in the bottom picture registers the flute; the 59 degree mark is for your standard 118 degree bit. There's a screw that slides on the square shaft that supports the end of the bit and allows you to turn it but it's missing.
They work well with practice but you need a grinder with access to the flat side of the stone. I never used mine again after I got a Drill Doctor; but I do have some larger bits waiting for a sharpening so I'll drag it out one of these days.
After looking at the instruction sheet and then at my own this morning, it looks like the lip rest (what I called the spring steel) has been replaced with one of a different geometry on yours. Given that, and the lack of the feed screw component, maybe yours has been set up to grind relatively large diameter drill bits, or maybe some other type of tooling? That definitely is not the original lip rest.
I have one of these drill bit sharpeners (General Tool) and I will say its the best I have owned. I have had a Drill Doctor and several others that went down the road after I got this one. I have mine permanently set up to run against the side of the grinding stone and can sharpen a drill in about thirty seconds. Economically priced and works.
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Sharpening jig for woodturning chisels.
ReplyDeleterdguy
I believe it's a drill bit grinding jig that's missing a part. The pointed piece of spring steel visible in the bottom picture registers the flute; the 59 degree mark is for your standard 118 degree bit. There's a screw that slides on the square shaft that supports the end of the bit and allows you to turn it but it's missing.
ReplyDeleteThey work well with practice but you need a grinder with access to the flat side of the stone. I never used mine again after I got a Drill Doctor; but I do have some larger bits waiting for a sharpening so I'll drag it out one of these days.
Here are the instructions for using it:
https://www.micro-machine-shop.com/Drill_grinding_attachment_9-6677_manual.pdf
After looking at the instruction sheet and then at my own this morning, it looks like the lip rest (what I called the spring steel) has been replaced with one of a different geometry on yours. Given that, and the lack of the feed screw component, maybe yours has been set up to grind relatively large diameter drill bits, or maybe some other type of tooling? That definitely is not the original lip rest.
ReplyDeleteI have one of these drill bit sharpeners (General Tool) and I will say its the best I have owned. I have had a Drill Doctor and several others that went down the road after I got this one. I have mine permanently set up to run against the side of the grinding stone and can sharpen a drill in about thirty seconds. Economically priced and works.
ReplyDelete