What are these?

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SteveM
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What are these?

Post by SteveM »

These look like some kind of end mill or reamer, but not sure.

Anyone know what these are?

Can anyone use them?

Steve
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Richard_W
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Re: What are these?

Post by Richard_W »

Taper reamers. No I can't use them in the past. I used them on injection molds although maybe not the same taper.
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ctwo
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Re: What are these?

Post by ctwo »

I could use them to hold down some drawer liners. I would probably find a use for them eventually.
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John Hasler
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Re: What are these?

Post by John Hasler »

What are the tapers?
spro
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Re: What are these?

Post by spro »

I am pretty sure they were used with the hand crank drill presses. Some had power feed (as we know) and the chucks were just that. The chuck was a new thing and had a bolt at the side. Everybody needed a taper drilled for a purpose.
SteveM
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Re: What are these?

Post by SteveM »

John Hasler wrote: Fri Sep 28, 2018 1:32 pm What are the tapers?
They are about 30 degrees total (15 degrees to each side of center).

Steve
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Harold_V
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Re: What are these?

Post by Harold_V »

SteveM wrote: Fri Sep 28, 2018 3:44 pm
John Hasler wrote: Fri Sep 28, 2018 1:32 pm What are the tapers?
They are about 30 degrees total (15 degrees to each side of center).

Steve
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H
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Richard_W
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Re: What are these?

Post by Richard_W »

Actually these can be used in the mill to cut an angle on the side of a part as well.
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ctwo
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Re: What are these?

Post by ctwo »

I was hoping you could cut V slots.
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...
Richard_W
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Re: What are these?

Post by Richard_W »

ctwo wrote: Sat Sep 29, 2018 4:40 pm I was hoping you could cut V slots.
Looks like it would.
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Harold_V
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Re: What are these?

Post by Harold_V »

So long as the end has some relief, yeah, they'll work fine for cutting a tapered slot. Doesn't look like they do have, though. They'd still cut, but with some difficulty. If a dead flat bottom wasn't a requirement, the needed relief can be applied by hand. A cutter grinder would be a better choice, however.

Do keep in mind, when small ended cutters are used, the surface speed is very low. If the material being machines is tough, it would be pretty easy to break the tip. Increasing spindle speed helps, and reducing feed does, too.

One real negative with this type of tool for longitudinal cuts----unlike a helical tool, the cutting edge abruptly enters the cut, and exits the same way. They're prone to making a little noise, along with considerable hammering, and usually won't perform as well as a helical tool. Reminds me a great deal of some of the first carbide end mills, which were brazed. Square ground straight teeth, not helical. They were dreadful cutting tools, but we had to start somewhere. Micro grain carbide and CNC grinders made end mills much better.

H
Wise people talk because they have something to say. Fools talk because they have to say something.
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