Operators manual for the Pentruder 8 – 20HF IQ and Pentpak 427
Page 22
Tractive Support
Spindle speed in rpm and peripheral cutting speed in metres / second for different blade
diameters, with blade speed potentiometer setting at 90%, which corresponds to 400Hz:
Gear
Ø
600
Ø
700
Ø
800
Ø
900
Ø
1000
Ø
1200
Ø
1600
Ø
2000
1 = 460 rpm
14,6
17,1
19,5
21,9
24,4
29,2
39,0
48.8
2 = 670 rpm
21,0
24,5
28,0
31,5
35,0
42,0
56,0
Not permitted
3 = 840 rpm
26,5
30,9
35,3
39,7
44,1
52,9
Not permitted Not permitted
4 = 1055 rpm
33,3
38,8
44,4
49,9
55,4
Not
permitted
Not permitted Not permitted
The peripheral speeds above in bold style are recommended maximum speeds for concrete
containing mainly flint and very hard concrete with a high content of steel.
For 2000 mm blades, reduce the HF-motor speed to about 80% of max speed, this will result in 400
RPM and 43 m/s peripheral speed. See the first table.
Full power is available from 80% to 90% of maximum speed. At a setting of 100% on the speed
potentiometer power is reduced by 0.4 kW.
Spindle RPM
1200
400
800
600
1000
20
30
40
50
Ø 1200 mm blade
Ø 1000 mm blade
Ø 800 mm blade
Ø 600 mm blade
Ø 2000 mm blade
Ø 1600 mm blade
1:st gear
2:nd gear
3:rd gear
4:th gear
m/second at 400Hz
(set potentiometer at
90 %*)
Depending on what size of blade you are using, you achieve a suitable peripheral cutting speed by choosing
the correct gear.
You can use the potentiometer to adjust the speed continously (alteration of the frequency - Hz to the motor).
* With the first version of the remote control, the scale for the blade potentiometer is from 0-100%. The setting
for 400Hz is then 70%
