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7.
DRILL SPEEDS
d
The chart below shows recommended drill speeds for various bit diameters and materials. Select the available drill speed that is the same as,
or nearest to, the one recommended for the task in hand.
Drill Diameter
(mm)
Steel
3
1820
4
1350
5
1290
6
970
7
830
8
830
9
500
10
500
11
500
12
420
13
420
14
420
16
320
18
320
20
280
22
210
25
120
Spindle Pulley
8. MAINTENANCE
8.1.
Clean the drill after each use. A coat of automobile-type wax applied to the table and column will help to keep the surfaces clean.
8.2.
Blow out any dust that may have accumulated in the motor.
8.3.
Periodically lubricate the table elevation rack/gear/worm mechanism.
8.4.
Belt changing:
8.4.1.
Open the pulley cover (48) and loosen the motor adjustment screw (36).
8.4.2.
With the tension released, remove the belt and fit a replacement to the same specification as the original.
8.4.3.
With the motor adjustment clamp screw (36) loose and using hand pressure on the motor, set tension so that belt deflection is no more
than 10mm each side, at centre span, under finger pressure. Tighten clamp screw (36).
© Jack Sealey Limited
Drill Speed (rpm)
Cast Iron
Iron
2580
2580
1820
1820
1350
1350
1290
1290
970
970
970
970
970
830
830
830
830
830
830
500
500
500
500
500
500
500
420
420
320
320
320
280
280
210
Drill Speed (rpm)
Please note that an instructional video for this product is available to view on our YouTube channel.
Original Language Version
Alum'& Copper
2580
2580
2580
2580
2580
2580
1820
1820
1820
1820
1350
1350
1290
1290
970
970
830
2450
1870
1330
790
500
Motor Pulley
GDM790BR,GDM1630FR Issue; 6(S) - 07/02/18
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