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Aug-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
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%
Cast Steel
Tool Steel
ft/min
m/min
40
18
2445
2865
1220
1910
815
1145
610
955
490
715
405
570
350
520
305
440
245
360
205
285
Made in China to TQB Brands Pty Ltd specifications
Visit us at www.tqbbrands.com.au
Cast Iron
Cutting Speed
ft/min
m/min
ft/min
60
24
80
Cutting Speed Revolution Per Minute
3665
3820
4890
1835
2545
2445
1220
1530
1630
915
1275
1220
735
955
980
610
765
815
525
700
700
460
590
610
365
480
490
305
380
405
Product Code: CH16NT
Mild Steel
Alum. & Copper
m/min
ft/min
m/min
30
100
60
4775
6110
9550
3185
3055
6365
1910
2035
3820
1590
1530
3180
1195
1220
2390
955
1020
1910
870
870
1740
735
765
1470
600
610
1200
480
510
955
ft/min
200
12225
6110
4075
3055
2445
2035
1745
1530
1220
1020
Page 7
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