What are these?
What are these?
These look like some kind of end mill or reamer, but not sure.
Anyone know what these are?
Can anyone use them?
Steve
Anyone know what these are?
Can anyone use them?
Steve
Re: What are these?
Taper reamers. No I can't use them in the past. I used them on injection molds although maybe not the same taper.
Re: What are these?
I could use them to hold down some drawer liners. I would probably find a use for them eventually.
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...
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Re: What are these?
What are the tapers?
Re: What are these?
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.
Re: What are these?
They are about 30 degrees total (15 degrees to each side of center).
Steve
Re: What are these?
In shop talk, "included angle".
H
Wise people talk because they have something to say. Fools talk because they have to say something.
Re: What are these?
Actually these can be used in the mill to cut an angle on the side of a part as well.
Re: What are these?
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...
To measure is to know - Lord Kelvin
Disclaimer: I'm just a guy with a few machines...
Re: What are these?
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
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.