Chucking; Tool Setup - Promac GH-1640ZX Mode D'emploi

E.....Automatic Feed Lever
longitudinal feed...push and
down
cross feed...........pull and up
F.....Adjustable feed clutch
G.....Feed engage lever
H.....Cross slide hand wheel
J......Top Slide Hand Wheel
K.....Tool post clamping lever
Fig 8
A....Tailstock Spindle Locking Lever
B.....Tailstock Locking lever
C....Tailstock Spindle Hand Wheel
D....Tailstock off-set adjustment

6.2 Chucking

Chuck removal:
Before removing the chuck from the
spindle, place board across the bed
ways under the chuck.
Support the chuck while turning three
cam locks ¼ turn counter-clockwise.
Line up the two marks (A, Fig 9) for
removal.
Fig 9
Carefully remove the chuck form the
spindle.
Clean all contact surfaces.
Lift the chuck up to the spindle nose
and press onto the spindle.
Tighten in place by turning the cam
locks ¼ turn clockwise.
The index mark (A) on the camlock
should be between the two indicator
arrows (B).
If not, adjust the cam studs by
turning them in or out by one turn as
needed.
Tighten cam locks.
Attention:
Never exceed the max speed
limitation of the work holding device.
Jaw teeth and scroll must
always be fully engaged.
Otherwise chuck jaws may
break and fly off in rotation
(Fig 10).
Fig 10
Avoid long workpiece extensions.
Parts may bend (Fig 11) or fly off
(Fig 12).
Use tailstock or rests to support.
Fig 11
5
Fig 12
Avoid short clamping contact (A, Fig
13) or clamping on a minor part
diameter (B).
Fig 13
Face locate the workpiece for added
support.

6.3 Tool setup

The cutting angle is correct when the
cutting edge is in line with the centre
axis of the work piece. Use the point
of the tailstock centre as a gauge
and shims under the tool to obtain
the correct centre height.
Use a minimum of two clamping
screws when installing the cutting
tool to the four way tool post.
Avoid big tool extensions.
6.4 Spindle speeds selection
The correct spindle speed depends
on the type of machining, the cutting
diameter, the material to be
machined and the cutting tool.
These are recommended max.
speeds for a 50mm cutting diameter
with carbide (HM) tools:
Aluminium, brass
Cast iron
Mild steel
High carbon steel
Stainless steel
1500 RPM
1000 RPM
800 RPM
600 RPM
300 RPM