And you would really be surprised at how efficient and wll HSS parting
tools can actually part if they are properly ground and made to mimic
the geometry of an insert......I do agree inserts are a vast
improvement as it eliminates a lot of had profiling and time, and one
of the greatest things to ever come along, but I sure do not discount
HSS parting tools one little bit.

On Sat, 12 Nov 2005 12:10:29 -0500, "Dixon"
wrote:

===
==="~Roy" wrote in message
et...
=== Hmmmm........I wonder how they ever parted items then before the
=== advent of insert tooling? I have never used a T shape parting tool
=== but use the typical sort of V shaped parting tool in HSS as well as
=== insert type all the itme......I sure would not like my HSS parting
=== tools to get put in a museum, as I use em too much.
===
===I didn't say the hs blades didn't work, just that I have never seen such an
===improvment in any other tooling system, probably due to the unusual geometry
===of the top face of the carbide parting insert type. I also wondered how they
===used to move heavy objects before the wheel was invented!
===
===Dixon
===
===
===
===
=== If the high end of the angle wa to the right, the finished part that
=== was dropped should be relatively free of a nib.
=== Sometimes it helps to grind the sides (both sides) of parting tool
=== blade so they have a long taper, not much but some so as the parting
=== tool is entering the work the sides are free adn clear from the
=== cutting edge back. A small nick or V ground in the very end of the
=== cutting tools working edge will also help to some degree to curl up
=== the material as its removed. Lots of lube certainly helps, for keeping
=== it cool and friction free. I find power feed to be a much better
=== method than trying to free hand it which a lot of folks do since they
=== are a bit nerveous on powerfeed parting. Usually on a lot of stock you
=== may even have to change feeds and speeds 2 or three times until its
=== parted off. Its also importasnt that the parting tool is 90 deg to
=== stock being parted.
===
===
===
===
===
=== On Sat, 12 Nov 2005 10:51:56 -0500, "Dixon"
=== wrote:
===
======
wrote in message
om...
====== The other night I needed to whip out a bunch of 1" rollers to fix a
====== chip conveyor.
======
====== Well, I got them made but it did remind me that I really don't have
===a
====== good grounding in the proper use of a parting tool.
======
====== The tool was 3/32 hhs, and was ground to an angle so that the right
====== side entered the part first.
======
====== I didn't think that was right and likely the machinist on days may
====== have ground it that way for other purposes but it got the job done.
======
====== So, how about some tips on proper use/setup/feeds/ect?
======
====== Thanks in advance,
======
====== Wes
======
======
======
======If I am reading you correctly you are using a high speed "T" type
===parting
======blade. The only place for these blades is in a museum. The insert
===type
======(iscar or others) are so vastly superior it's hard to believe. I
===remember
======the old days of parting with those old blades, and squinting and
===tensing up,
======just waiting for the inivitable moment that the blade would grab and
===either
======break or tear the workpiece out of the machine. Years ago my brother
===worked
======third shift (alone) parting 3" bar on a lathe with the new insert
===style
======tools. Just for fun he kept increasing the infeed one step at a
===time,just to
======see the limit of the tools ability. He was very surprised how fast he
===could
======plow through before the tool broke.He insisted on me changing to the
===insert
======system and I feel it was one of the best upgrades I have ever seen.
======
======Dixon
======
===
===
=== ==============================================
=== Put some color in your cheeks...garden naked!
=== "The original frugal ponder"
=== ~~~~ }((((o ~~~~~~ }{{{{o ~~~~~~~ }(((((o
===


==============================================
Put some color in your cheeks...garden naked!
"The original frugal ponder"
~~~~ }((((o ~~~~~~ }{{{{o ~~~~~~~ }(((((o