AMT 4562 - Page 10

6. For spindle speeds, please refer to the speed diagram inside pulley cover. A list relates how to choose
drill bit size and revolution for various materials is available for your reference as below.
Reference List of Drill, Revolution and Various Materials
Material
Cast Iron
Steel
Iron
Aluminum
Gun Metal
Rotative i
speed R.P.M. \
Drill \ \
Dia. (mm) \\
es3
2550
1600
2230
9500
8000
0 4
1900
1200
1680
7200
6000
0 5
1530
955
1340
5700
4800
06
1270
800
1100
4800
4000
0 7
1090
680
960
4100
3400
0 8
960
600
840
3600
3000
. 0-9
850
530
740
3200
2650
0 I O
765
480
670
2860
2400
0-11
700
435
610
2600
2170
0 I 2
640
400
560
2400
2000
0 13
590
370
515
2200
1840
0 14
545
340
480
2000
1700
0 1 6
480
300
420
1800
1500
0-18
425
265
370
1600
1300
0 20
380
240
335
1400
1200
022
350
220
305
1300
1100
025
305
190
270
1150
950
7. To change spindle speed, loosen the slide bar bolt (A), See Fig. 14. Slide the motor toward the front of
the drill press and then tighten the slide bar bolt. This will loosen the belt and permit relocating the belt
to the desired pulley for the required spindle speed. After selection has been made, loosen the slide bar
bolt, slide the motor toward the rear of the drill press and tighten the slide bar bolt again, check the belt
for proper tension and make any final adjustment.
Fig. 14
7