I have to put a 3/4 convex radius on the side of a side milling
cutter. The tangent to side of cuuer is .250 from top. I also need to
sharpen a convex 7/32 on top of another. We have a K. O. Lee radius
dresser and I theoretically know how to get these radiuses on the
grinding wheels.

I have somehow worked in 12 machine shops and never even seen one of
these being used. I'd thought I'd ask here before spending alot of
time learning the hard way. I'm having way too much of that kind of
learning lately.
Ken

wrote:

I have to put a 3/4 convex radius on the side of a side milling
cutter. The tangent to side of cuuer is .250 from top. I also need to
sharpen a convex 7/32 on top of another. We have a K. O. Lee radius
dresser and I theoretically know how to get these radiuses on the
grinding wheels.

I have somehow worked in 12 machine shops and never even seen one of
these being used. I'd thought I'd ask here before spending alot of
time learning the hard way. I'm having way too much of that kind of
learning lately.
\
You do NOT do this by dressing a grinding wheel, you do it by using a radius
attachment on a tool & cutter grinder. Those are very spendy accessories.
Suggest you farm it out to a pro.

GWE

On Thu, 28 Jul 2005 12:52:01 -0700, Grant Erwin
wrote:

wrote:

I have to put a 3/4 convex radius on the side of a side milling
cutter. The tangent to side of cuuer is .250 from top. I also need to
sharpen a convex 7/32 on top of another. We have a K. O. Lee radius
dresser and I theoretically know how to get these radiuses on the
grinding wheels.

I have somehow worked in 12 machine shops and never even seen one of
these being used. I'd thought I'd ask here before spending alot of
time learning the hard way. I'm having way too much of that kind of
learning lately.
\
You do NOT do this by dressing a grinding wheel, you do it by using a radius
attachment on a tool & cutter grinder. Those are very spendy accessories.
Suggest you farm it out to a pro.


Another way is with a profile grinder. I happen to have one in
storage if any one is interested. I'll never have room to set it up in
my shop.

"Grant Erwin" wrote in message
...
wrote:

I have to put a 3/4 convex radius on the side of a side milling
cutter. The tangent to side of cuuer is .250 from top. I also need to
sharpen a convex 7/32 on top of another. We have a K. O. Lee radius
dresser and I theoretically know how to get these radiuses on the
grinding wheels.

I have somehow worked in 12 machine shops and never even seen one of
these being used. I'd thought I'd ask here before spending alot of
time learning the hard way. I'm having way too much of that kind of
learning lately.
\
You do NOT do this by dressing a grinding wheel, you do it by using a
radius
attachment on a tool & cutter grinder. Those are very spendy accessories.
Suggest you farm it out to a pro.

GWE


While that would be the best way to do the job, it can be done with a
profiled wheel. Once the radius is established on the cutter, it must be
relieved by hand, and very carefully, so you get to the edge, but don't
destroy it. It's the kind of thing I'd expect most any of us home shop types
to do in a pinch. Needless to say, it requires considerable skill, but it
can be done.

There's a second option, too, one whereby you use a finger and establish the
relief by plunge grinding with a slightly modified radius to compensate for
the degree of error created by leaving center. It, too, would require lots
of talent.

Harold

--Sounds like time to build a Quorn! :-)

--
"Steamboat Ed" Haas : Just another fart in
Hacking the Trailing Edge! : the Elevator of Life...
http://www.nmpproducts.com/intro.htm
---Decks a-wash in a sea of words---