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4. When the belt has been correctly
positioned, re-tension by levering
the motor away from the head
until the belt deflects by approx.
10 mm at its centre when using
reasonable thumb pressure. Lock
the motor in this position with the
belt tension locking screw.
DRILL OPERATING SPEEDS
The table below gives the belt arrangement for given drill speeds.
A similar chart is also located on the inside of the pulley cover.
The diagram shows the belts fitted to step 4 of the spindle pulley and step 1 of
the motor pulley, giving a speed of 150rpm.
S
PINDLE
P
ULLEY
A /
C
ENTRE
M
OTOR
P
ULLEY
B/
C
ENTRE
D
RILL
S
PEED
RPM
S
PINDLE
P
ULLEY
A/
C
ENTRE
M
OTOR
P
ULLEY
B/
C
ENTRE
D
RILL
S
PEED
RPM
1
1-A
D-4
150
7
4-D
C-3
830
2
2-B
D-4
240
8
3-C
B-2
1030
3
1-A
C-3
270
9
2-B
A-1
1270
4
3-C
D-4
330
10
4-D
B-2
1430
5
2-B
C-3
430
11
3-C
A-1
1790
6
1-A
B-2
470
12
4-D
A-1
2450
Содержание 6505592
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