12
2.
Lever the motor, on its bracket, away from the head, by turning lever B - Fig.11,
anticlockwise so that tension is applied to the belts.
NOTE:
The idler pulley will ‘float’ so that tension is equally applied to both belts
Tension is correct, when the belts deflect by approx. ½” at their centre when using
reasonable thumb pressure.
Lock the motor in this position using the two Locking Screws (A - Fig. 11).
NOTE:
If the belt should slip whilst drilling, adjust the belt tension.
DRILL SPEED TABLE
T
he table below gives the belt arrangements for given drill speeds. The diagram shows the
belts fitted to A1 and B3, giving a drill speed of 1540 RPM.
A full chart is also located on the inside of the pulley cover.
2. Changing Drill (Spindle) Speed.
Before changing the speeds, ensure the
machine is switched OFF, and disconnected
from the mains supply.
1
Undo the Belt Tension Locking Screws (A Fig.
11), one either side of the head, and turn
lever B - Fig.5 clockwise to relieve any tension
on the belts. Referring to the chart inside
the belt cover (which is duplicated below),
install the belts in the positions corresponding
to the spindle speed required.
Fig. 11
1
2
3
4
1
2
3
4
A
B
SPINDLE PULLEY
MOTOR PULLEY
Spindle
Motor
Drill Speed
Spindle
Motor
Drill Speed
Pulley
Pulley
RPM
Pulley
Pulley
RPM
A
B
A
B
1
4
1
180
7
1
2
970
2
4
2
250
8
2
3
1280
3
3
1
300
9
3
4
1410
4
3
2
400
10
1
3
1540
5
2
1
480
11
2
4
2270
6
4
3
580
12
1
4
2740
Содержание Metalworker CDP301B
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