Page 608 - Master Catalog 2017, Inch

Separator
™
Machining Guidelines

Definitions and Guidelines • If 0° lead angle is mandatory,

use the narrowest possible
1. Width of cut (W) = width of the insert.
cut-off insert and blade. This
2. Lead angle = 0° (neutral); 4°, 5°, 12°, 18° (RH or LH). will minimize the center stub
or cut-off bur length. Decrease
the feed rate to maximum .002"
(0,05mm) or less at the point
where diameter equals
Reduce bur of cut-off faces: insert width.
• Use lead angle-type inserts (Figures 1 and 2). Lead • On tubing-type parts that
angle on a cut-off insert reduces the bur that remains require a chamfer on the I.D., Figure 4
on the part but decreases tool life and increases tool align I.D. chamfer tool with cut- Internal chamfer line up
side defl ection and possibly cycle time. off surface. This will enable the
chamfering operation to actually
separate the part from the bar
(see Figure 4). Note the part
may drop onto the chamfering
bar, which, in this case, will act
Figure 1
like a catcher for the part.
Insert selection left-hand lead
center stub bur part
Improve surface finish of cut-off faces:

(stock) (stock)
• Use insert with 0° lead angle.
• Increase coolant fl ow or improve application technique,
as shown in Figure 5.
cut-off to center tube cut-off
• Decrease the feed rate near the break-through point of the cut.
• Check that the grooving tool is set at the correct angle.
Left-hand lead insert leaves center stub or bur on part
• Use blades with the greatest possible face height and smallest
and produces clean stock surface.
possible cutting width.
• Increase the speed.
Figure 2
Insert selection right-hand lead
center stub bur part

(stock) (stock)

cut-off to center tube cut-off

Right-hand lead insert leaves center stub or bur on stock and
produces clean part surface.
• Check total height and maintain on center with part diameter.
• The cutting edge height should be within ±.004" (0,1mm) to
the center; recommended cutting position is .002" (0,05mm)
above center.

Figure 3 Figure 5
Above center Preferred method for applying coolant
• Mount cut-off tool upside down. This enables gravity to remove
chips and avoid cutting the chips twice. Another benefi t of
mounting the tool upside down is preventing chips from wedging
max .004" between the tool insert and the groove side walls, which galls the
(0,10mm)
side wall surfaces.

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