What's this bit about?
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What's this bit about?
I just bought a used 12" lathe and am sorting out all the stuff that came with it. There are handfulls of bits that look like this. I am used to square tools, cut-off blades, inserts etc., but what are these? Tool steel, .200 thick, about 5/8 to 3/4 wedge height, and about 1-1/2 to 1-3/4 long. Penny shown for reference.
Thanks!
Thanks!
Re: What's this bit about?
That looks like a serious chip breaker.
Standards are so important that everyone must have their own...
To measure is to know - Lord Kelvin
Disclaimer: I'm just a guy with a few machines...
To measure is to know - Lord Kelvin
Disclaimer: I'm just a guy with a few machines...
Re: What's this bit about?
Looks to me like they were made out of old pocket knife blades, the groove is the thumb notch.
Re: What's this bit about?
I think Morgan is right. Looks like some one needed some tooling, so they ground them from old knives. Low cost and recycling to get it done! Seems like a good idea to me.
Live for the moment!
Prepare for tomorrow!
Forgive the past!
Prepare for tomorrow!
Forgive the past!
Re: What's this bit about?
I have no idea what they are but they look uniform in thickness and all seem to have the notch so I don't think they are made from knife blades. The notch seems to be a functional feature to me. It kinda looks like there may have been some sort of writing on them.
Don Young
Re: What's this bit about?
Now premade inserts are available. Back then premade chipbreakers MIGHT have been available. Sort of like buying a bulk piece of hole. Cutoff a piece 6' long and place it on the ground where You want a hole, and presto it's done. ( goes back a few years on the internet)
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Re: What's this bit about?
Acme sold then to fence builders :
A a certain coyote. Beep beep!
A a certain coyote. Beep beep!
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Re: What's this bit about?
Thanks all, especially for the serious replies. I am wondering if they were from another industry, maybe commercial wood-working blades of some sort? Maybe the previous owner could somehow get them at a good price? A 12" lathe does not nedd to take a .200" wide chip!
Anyway, I'll probably just toss them in with the next scrap load!
Anyway, I'll probably just toss them in with the next scrap load!
Re: What's this bit about?
Why not try posting on a wood working bbs?
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Re: What's this bit about?
The comment about maybe "used for wood" was just a guess on my part. I probablyI'll just keep them as .200" ground packing to use with a drill press or mill vise.
Can I even use those words in a "Lathe Forum"?
Can I even use those words in a "Lathe Forum"?
Re: What's this bit about?
Just a guess, but maybe they go in an adjustable shell reamer like this.
They are pretty useless without the body or shell.
Kap
They are pretty useless without the body or shell.
Kap
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Fadal Turn, Fadal Vmc 15, Prototrak 16 x 30 Cnc Lathe, Pratt and Whitney 16 x 54 lathe, Pratt and Whitney Vertical Shaper, G & E 16" Shaper, B & O Electric turret lathe, 36" Doall band saw,
Enco B.P. Clone, Bridgeport CNC Mill, Delta 12" Surface Grinder.
Enco B.P. Clone, Bridgeport CNC Mill, Delta 12" Surface Grinder.
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Re: What's this bit about?
KAP - Yes, I think that is exactly right! I think I found about 36 pieces, so maybe 6 sets? You are correct, there is no holder.
Would these interest anyone? If there is interest, I will sort for size. As observed above, there are markings, but they seem to be hand-marked with a vibratory etch tool, not a factory mark.
I hate throwing away things just because they are not useful to me. I'd send them for postage.
Would these interest anyone? If there is interest, I will sort for size. As observed above, there are markings, but they seem to be hand-marked with a vibratory etch tool, not a factory mark.
I hate throwing away things just because they are not useful to me. I'd send them for postage.