Changing Spindle Speeds; Adjusting The Depth Stop - Jet JMD-15 Handbuch

I.....Fine feed engagement knob
J....Fine feed dial
Fig 8
A....Motor mount lock lever
B....Head pivot lock
Fig 9
A....ON-button
B....Stop button
C....Emergency stop button
D....Quill lock handle
E....Head elevating crank
6.2 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 10mm high speed steel (HSS) tool
(e.g. drill bit).
Aluminium, brass
Cast iron
Mild steel
High carbon steel
Stainless steel
If a carbide (HM) tool is used about 5
times higher speeds can be chosen.
Generally speaking, the larger in
relation the cutting diameter, the
smaller the possible RPM.
For example:
Milling mild steel with an end mill of
20mm allows a speed of
400 RPM max.
2000 RPM max.
7. Setup and adjustments
Warning:
Setup and adjustment work may
only be carried out after the machine
is protected against accidental
starting.
Press emergency stop button!

7.1 Changing spindle speeds

Release two latches (G, Fig 10) and
pull the pulley guard (I) open.
Open the pulley cover.
Loosen the motor lock lever (F) and
pull the motor toward the head casting
to release tension on the V-belts.
Refer to the speed chart (H) whenever
changing speeds.
Close and lock the pulley cover.
7.2 Arbor replacement
Release two lathes (G, Fig 10) and pull
the pulley guard (I) open.
Open the pulley cover.
Hold the spindle pulley (B, Fig 11) to
1500 RPM
keep the pulley from moving while
loosening the drawbar (C) with a
1000 RPM
wrench.
800 RPM
600 RPM
300 RPM
with HSS tool
with carbide tool
Fig 10
7
Fig 11
Loosen the drawbar 2 to max 3 full
turns.
Tap the drawbar head with a rubber
mallet to dislodge the arbor.

7.3 Adjusting the Depth Stop

To drill multiple holes at the same
preset depth, use the depth stop:
JMD-18:
Push in the button on the front of the
quick adjust stop (F, Fig 12) and move
to the desired position.
Fig 12
JMD-18PF:
Adjust the drill depth stop (N, Fig 13)
with lock knob (O).
Fig 13