Can you ID these lathe tools? I found them in a large box of various lathe
cutting tools.

These are some of a dozen or so, ground from rod stock and honed. I have no
idea what they were made for. They are ground to the centerline and have no
relief angle.
http://i221.photobucket.com/albums/d...e/IMG_0877.jpg

This one has some pretty serious angles on it and has a very thick carbide.
I can't figure out what carbide-worthy material needs so much relief.
http://i221.photobucket.com/albums/d...e/IMG_0884.jpg
http://i221.photobucket.com/albums/d...e/IMG_0883.jpg

This one has a cutting edge about 5 inches long, again no idea what you
would cut with it. It really is a blade more than a single-point, and agin,
zero relief.
http://i221.photobucket.com/albums/d...e/IMG_0881.jpg
http://i221.photobucket.com/albums/d...e/IMG_0883.jpg
http://i221.photobucket.com/albums/d...e/IMG_0880.jpg



--
Stupendous Man,
Defender of Freedom, Advocate of Liberty

Stupendous Man wrote:
Can you ID these lathe tools? I found them in a large box of various
lathe cutting tools.

These are some of a dozen or so, ground from rod stock and honed. I have
no idea what they were made for. They are ground to the centerline and
have no relief angle.
http://i221.photobucket.com/albums/d...e/IMG_0877.jpg

Taper reamers. Home made. The model locomotive builders use similar
for making working model injectors for topping up their boilers. Cheap
and easy to make, without having to use any high tech measuring tools,
as you start with a diameter, and a distance, then grind or machine away
half, harden, then stone the face.

This one has some pretty serious angles on it and has a very thick
carbide. I can't figure out what carbide-worthy material needs so much
relief.
http://i221.photobucket.com/albums/d...e/IMG_0884.jpg
http://i221.photobucket.com/albums/d...e/IMG_0883.jpg

Carbide isn't just for hard materials. It is also used for abrasive
materials (some plastics, some woods, fiberglass, etc.) as well as to
enable the use of the higher cutting speeds allowed by the carbide.

This one has a cutting edge about 5 inches long, again no idea what you
would cut with it. It really is a blade more than a single-point, and
agin, zero relief.
http://i221.photobucket.com/albums/d...e/IMG_0881.jpg
http://i221.photobucket.com/albums/d...e/IMG_0883.jpg
http://i221.photobucket.com/albums/d...e/IMG_0880.jpg


I've seen similar as blanks for boring tools, as well as as single
edged engraving cutters.
The engraving cutters were usually round shanked, but they had the
profile ground to a half round shape for most of their length. The were
sharpened by taking a single compound angle grind across the end.

If the grind goes full half round, or just quarter round, they may be
pre-ground blanks for boring or internal threading tools.
With a square shank on them, that's what I'd bet.

I've lost money betting, before, though.

Cheers
Trev

Stupendous Man wrote:

Add these to trevors' responses,

These are some of a dozen or so, ground from rod stock and honed. I have
no idea what they were made for. They are ground to the centerline and
have no relief angle.
http://i221.photobucket.com/albums/d...e/IMG_0877.jpg

I've seen similar cutters used to trepan rubber, and in with tramels to
cut gaskets, I think the points might be to blunt but engraving is done
with similar tools also.


This one has some pretty serious angles on it and has a very thick
carbide. I can't figure out what carbide-worthy material needs so much
relief.
http://i221.photobucket.com/albums/d...e/IMG_0884.jpg
http://i221.photobucket.com/albums/d...e/IMG_0883.jpg

I first thought this was a boring bit by the angle of the top rake, but
the second picture shows side rake (not normally used for brazed boring
bits). I have seen similar brazed bits on old large face milling cutters.


This one has a cutting edge about 5 inches long, again no idea what you
would cut with it. It really is a blade more than a single-point, and
agin, zero relief.
http://i221.photobucket.com/albums/d...e/IMG_0881.jpg
http://i221.photobucket.com/albums/d...e/IMG_0883.jpg
http://i221.photobucket.com/albums/d...e/IMG_0880.jpg


I can't see the back side, but if the tool is ground 1/4 around with a
flat top and a flat back with about 5-7 degrees front clearance it would
be used to trepan face grooves with a lathe (and by the length of the
business end the user would have much bigger stones than I do).

Matt

"Stupendous Man" wrote in message
...
Can you ID these lathe tools? I found them in a large box of various lathe
cutting tools.

These are some of a dozen or so, ground from rod stock and honed. I have
no idea what they were made for. They are ground to the centerline and
have no relief angle.
http://i221.photobucket.com/albums/d...e/IMG_0877.jpg

That looks like a D-bit engraving cutter, made mostly for use in pantograph
mills. They were very common before CNC came along. I have a few of them
that came along with a box of miscellaneous tools. I've never found a use
for them.

There are many kinds of D-bit tools; this is just one type. I see that
Trevor suspects they're tapered D-bit reamers. It's possible, but
considering how common these tools once were (look up "D-bit grinder" on
Google), I think it's more likely they're cutters for a pantograph. They
looked the same as tapered reamers.


This one has some pretty serious angles on it and has a very thick
carbide. I can't figure out what carbide-worthy material needs so much
relief.
http://i221.photobucket.com/albums/d...e/IMG_0884.jpg
http://i221.photobucket.com/albums/d...e/IMG_0883.jpg

Ordinary carbide-tipped lathe bits.

This one has a cutting edge about 5 inches long, again no idea what you
would cut with it. It really is a blade more than a single-point, and
agin, zero relief.
http://i221.photobucket.com/albums/d...e/IMG_0881.jpg
http://i221.photobucket.com/albums/d...e/IMG_0883.jpg
http://i221.photobucket.com/albums/d...e/IMG_0880.jpg

I suspect the first and last are single-lip reamers, but I'd have to see it.
The second is just a repeat of one of your lathe bits.

--
Ed Huntress

I suspect the first and last are single-lip reamers, but I'd have to see
it.
The second is just a repeat of one of your lathe bits.


Whups. End view, It would take a real pair to plunge with this one.
http://i221.photobucket.com/albums/d...e/IMG_0882.jpg

"Stupendous Man" wrote in message
...


I suspect the first and last are single-lip reamers, but I'd have to
see it.
The second is just a repeat of one of your lathe bits.


Whups. End view, It would take a real pair to plunge with this one.
http://i221.photobucket.com/albums/d...e/IMG_0882.jpg

That one's got me. The lip looks like a reamer, but single-lip reamers need
a bearing surface opposite the cutting edge, like a gundrill. I can't figure
that one out.

--
Ed Huntress

"Ed Huntress" wrote in message
...

"Stupendous Man" wrote in message
...


I suspect the first and last are single-lip reamers, but I'd have to
see it.
The second is just a repeat of one of your lathe bits.


Whups. End view, It would take a real pair to plunge with this one.
http://i221.photobucket.com/albums/d...e/IMG_0882.jpg

That one's got me. The lip looks like a reamer, but single-lip reamers
need a bearing surface opposite the cutting edge, like a gundrill. I can't
figure that one out.

--
Ed Huntress

Face groove or trepan, too long just to groove, so I suspect trepan

Stupendous Man wrote:


(snip)

Whups. End view, It would take a real pair to plunge with this one.
http://i221.photobucket.com/albums/d...e/IMG_0882.jpg

Yup, it's a trepan, I've used them but "never" to work at that depth.
Manchester makes curved support blades for inserted tooling, I don't
know if Iscar does or not.

Most often trepanning is done for a support/location lip or face seal
using "O" rings.

Used to be you could get tool steel trepanned, die blank with a hole in
it, they kept the inside, you got the blank with a large starter hole,
for the same price as the solid plate. Expensive material saved, labor
saved, win-win.... Who said "GREEN" was a new thing.

Matt

"Rick Samuel" wrote in message
...

"Ed Huntress" wrote in message
...

"Stupendous Man" wrote in message
...


I suspect the first and last are single-lip reamers, but I'd have to
see it.
The second is just a repeat of one of your lathe bits.


Whups. End view, It would take a real pair to plunge with this one.
http://i221.photobucket.com/albums/d...e/IMG_0882.jpg

That one's got me. The lip looks like a reamer, but single-lip reamers
need a bearing surface opposite the cutting edge, like a gundrill. I
can't figure that one out.

--
Ed Huntress

Face groove or trepan, too long just to groove, so I suspect trepan

I don't get it. How do you trepan with a solid tool? Or am I misreading the
photo, and this thing is hollow?

For that matter, how would you face groove with this tool?

--
Ed Huntress

"Rick Samuel" wrote in message
...

"Ed Huntress" wrote in message
...

"Stupendous Man" wrote in message
...


I suspect the first and last are single-lip reamers, but I'd have to
see it.
The second is just a repeat of one of your lathe bits.


Whups. End view, It would take a real pair to plunge with this one.
http://i221.photobucket.com/albums/d...e/IMG_0882.jpg

That one's got me. The lip looks like a reamer, but single-lip reamers
need a bearing surface opposite the cutting edge, like a gundrill. I
can't figure that one out.

--
Ed Huntress

Face groove or trepan, too long just to groove, so I suspect trepan

Oh, I think I see what you're saying. You're talking about holding the tool
in the cross slide of a lathe and trepanning a hole with a single point
cutter.

But that still doesn't make sense to me. This tool appears to have a long
cutting edge. A plunge-type face cutting tool only cuts on the leading edge,
and it would need relief behind it. What's all that cutting edge for, if
it's a tool for face-cutting disks on a lathe?

Are we talking about the same thing?

--
Ed Huntress

Ed Huntress wrote:
"Stupendous Man" wrote in message
...

Can you ID these lathe tools? I found them in a large box of various lathe
cutting tools.

These are some of a dozen or so, ground from rod stock and honed. I have
no idea what they were made for. They are ground to the centerline and
have no relief angle.
http://i221.photobucket.com/albums/d...e/IMG_0877.jpg


That looks like a D-bit engraving cutter, made mostly for use in pantograph
mills. They were very common before CNC came along. I have a few of them
that came along with a box of miscellaneous tools. I've never found a use
for them.

There are many kinds of D-bit tools; this is just one type. I see that
Trevor suspects they're tapered D-bit reamers. It's possible, but
considering how common these tools once were (look up "D-bit grinder" on
Google), I think it's more likely they're cutters for a pantograph. They
looked the same as tapered reamers.

I considered that they may be pantograph bits, and discounted it on
the tip shape, as all the ones I have, have been lopped off at a
diagonal, in order to form a single cutting edge on the end.

I suppose they could be, though.

Any back-story onthe tools that they were together with? That may help
explain. Or not.


Cheers
Trev

Ed Huntress wrote:


Oh, I think I see what you're saying. You're talking about holding the tool
in the cross slide of a lathe and trepanning a hole with a single point
cutter.

But that still doesn't make sense to me. This tool appears to have a long
cutting edge. A plunge-type face cutting tool only cuts on the leading edge,
and it would need relief behind it. What's all that cutting edge for, if
it's a tool for face-cutting disks on a lathe?

Are we talking about the same thing?

--
Ed Huntress



You got it Ed, long parting was often done on turret lathes with neutral
rake tools so the cutter wouldn't self feed. The blade is a bit above
center with a bit more clearance and the little nub at the center just
breaks off.

Lathe trepanning is worse, the tool (again above center) is ground with
a slight angle on the end to "push" the back side against the ID, or is
ground square (height on center) and the cuts are "pecked" by hand feeding.

The front clearance determines feed rate and is important, and if you
see chips breaking pretty soon there may be a "BOOM".

It is a quick way to make an 8" hole in a 12" plate, and of coarse saves
a 7" blank...

Matt

Any back-story onthe tools that they were together with? That may help
explain. Or not.

No, just present in 30 Lbs of various lathe cutting tools. They came from an
old race car machinist. We still fool around with magnesium suspension
castings and wheels.
I have a nice set of Val-cut trepanning tools, works nice but cutters are
expensive.
--
Stupendous Man,
Defender of Freedom, Advocate of Liberty