16
ADJUSTMENTS
To change between the 3 speed ranges, Figure 32, the
position of the drive belt on the motor and spindle pulleys
must be changed. To do this:
1. Unplug the lathe from the power source.
2. Open the 2 Belt Doors
to gain access to the belt and
pulleys that are inside of the headstock. FIG. 29, A & B.
3. Pull the Belt Tensioning Handle (#B52) forward, away
from the motor. Figure 30.
4. Push the Tensioning Handle down to loosen the tension
on the Poly-V-Belt (#B56). FIG. 31. The belt can now be
positioned on the pulleys for the desired speed range. FIG.
32 shows the belt positions for the three speed ranges.
NOTE:
The ‘High’ speed range #3 (100-3,850 RPM)
provides maximum speed. The ‘Low’ speed range #1 (20-
650 RPM) will provide maximum torque.
5. With the Poly-V-Belt positioned on the pulleys, raise the
tensioning handle so that the weight of the motor provides
the needed tension on the belt. Then secure the tensioning
handle in place by pushing the handle back towards the
motor. Figure 30.
6. Close the two front Belt Doors on the headstock to
protect the belt, pulleys and internal working from dust.
7. Plug the lathe back into the power source.
FIG. 29
1
2 3
SPINDLE
PULLEY
POULIE
BROCHE
POLEA
DEL HUSILLO
POULIE
MOTEUR
POLEA
DEL MOTOR
MOTOR
PULLEY
SPINDLE SPEEDS
VITESSE DE LA BROCHE
VELOCIDADES
DEL HUSILLO
RPM
1 = 20 - 650
2 = 50 - 1,750
3 = 100 - 3,850
C
M
Y
CM
MY
CY
CMY
K
70-3040 Spindle Speed Label Diagram EFS.pdf 1 7/2/2019 11:51:44 AM
Label 70mm x 115mm Black
CHANGING SPEEDS
THE MACHINE MUST NOT BE
PLUGGED IN AND THE POWER SWITCH MUST BE IN THE
OFF POSITION UNTIL ALL ADJUSTMENTS ARE COMPLETE.
FIG. 30
FIG. 31
FIG. 32
A
B
HANDLE PUSHED BACK
IN LOCKED POSITION
HANDLE PULLED FORWARD AND
DOWN TO LOOSEN BELT TENSION
PIVOT BOLT FOR MOTOR MOUNT
AND BELT TENSIONING PROCESS
