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DoN. Nichols
 
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Default How do you adjust the cutter bit on Aloris Tool Holders

In article ,
jim rozen wrote:
In article , Steve says...

How is the degree above centerline adjusted on Aloris type quick
change tool holders?


The tool holder has a sort of setscrew stop that gives
nearly micrometer accuracy in setting the height of
the tool above the bed.

The angle of the tool is adjusted by loosening the
hold down bolt and turning by hand.


You're talking about the side-to-side angle. I think that he
was talking about the *top-rake* angle, which with a lantern-style
toolpost is adjustable as he described. And the height and top-rake
interact on the lantern style toolpost -- usually adjusted for a
semi-reasonable compromise by adjusting the stick-out.

Normally, I set the toolpost up to present the tool shanks at a
right (side-to-side) angle to the workpiece, and the other set of
dovetails is then at the right angle for facing or boring instead of
turning.

With insert tooling, the rake angle is part of the machining of
the pocket for the insert (or perhaps, as in the threading inserts,
controlled by a solid carbide anvil which mounts between the insert and
the tool shank.

With HSS -- if you want a rake, you grind it in the tool while
shaping the rest of it.

In either case, with a quick-change toolpost, the bottom of the
tool shank is parallel to the bed and (hopefully) the floor.

They are independently adjustable.


Not the rake angle, but the side-to-side angle certainly is.

Typically the cutting edge is set as nearly on center
as you can. The best way to do this is to face off
a piece of stock - when the tip of the tool does
not leave a tit on the end of the stock (too low)
then it's right.


Indeed so -- and this part of your question has been covered
in greater detail by other responders.

Enjoy,
DoN.

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