Promac 213A Mode D'emploi page 10

III PARTS
3. Speed Adjustment
3‐1 1. Open the pulley case and 1 the belt tension
lock handle.
2. Choose speed for drilling operation and move
belt to correct position for desired speed.
3. Push motor backward until moderate belt
tension is acquired. Then retighten the lock
handle again. Fig. 16
The proper drill speed for a given drill bit size is as on following table:
Size Cast steel
Diameter
m/min ft/min m/min ft/min
12
mm inch
2 1/16 1910
3 1/18 1275
5 3/16 765
6 1/4 610
8 5/16 480
10 3/8 380
11 7/16 350
13 1/2 300
16 5/8 240
19 3/4 190
4. Belt Tension Adjustment
For proper belt tension: Use 10 lbs pressure or hand pressure on the belt as shown
below. The distance is 1/2" (12mm)+10%
Tool steel
40 18 60
Cutting speed revolution per minute
2445 2865 3665
1220 1910 1835
815 1145 1220
610 955 915
490 715 735
405 570 610
350 520 525
305 440 460
245 360 365
205 285 305
Cast iron Mild steel
Cutting speed
m/min ft/min m/min ft/min m/min
24 80 30
3820 4890 4775
2545 2445 3185
530 1630 1910
1275 1220 1590
955 980 1195
765 815 955
700 700 870
590 610 735
480 490 600
380 405 480
10/47
213A
Alum. & copper
ft/min
100 60 200
6110 6550 12225
3055 6365 6110
2035 3820 4075
1530 3180 3055
1220 2390 2445
1020 1910 2035
875 1740 1745
765 1470 1530
610 1200 1220
510 955 1020