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10/19
Speed Adjustment
Fig 16-1
Speed Adjustment
1. Open the pulley case and loosen the belt tension lock
handle
2. Choose speed for drilling operation and move belt to
correct position for preferred speed
3. Push motor backward until moderate belt tension as
required.
4. Re-tighten the lock handle. 16-1 & 16-2
Drilling Speed (Approximately)
Size
Cast Steel
Diameter
m/min
12
mm
Inch
2
1/16
1910
3
1/8
1275
5
3/16
765
6
¼
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
Belt Tension Adjustment
Correct belt tension: Use 4.5kg's of hand pressure on the belt as shown below. The distance is 1/2" (13mm) + 10%
Tool Steel
ft/min
m/min
ft/min
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
Made in China to TQB Brands Pty Ltd specifications
Visit us at www.tqbbrands.com.au
Cast Iron
Mild Steel
Cutting Speed
m/min
ft/min
m/min
24
80
30
3820
4890
4775
2545
2445
3185
1530
1630
1910
1275
1220
1590
955
980
1195
765
815
955
700
700
870
590
610
735
480
490
600
380
405
480
CH18FT
Alum. & Copper
ft/min
m/min
ft/min
100
60
200
6110
9550
12225
3055
6365
6110
2035
3820
4075
1530
3180
3055
1220
2390
2445
1020
1910
2035
870
1740
1745
765
1470
1530
610
1200
1220
510
955
1020
P a g e
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