Table 11.6
Conversion coefficient
K
a of impact energy of impactor
J series
W-210
DHD series
AM series
Mach 6
series
100
150
170
200
275
325
400
500
AM4
AM5
AM6
590
670
Air pressure
(MPa)
0.5
0.42
0.40
0.37
0.38
0.46
–
–
–
–
–
–
–
–
–
0.7
–
–
–
–
–
0.38
0.42
0.40
0.40
0.38
0.37
0.38
0.38
–
1.05
–
–
–
–
–
–
–
–
–
–
–
–
–
0.35
1.38
–
–
–
–
–
–
–
–
–
–
–
–
–
–
Valve distribution type
Plate valve
Valveless
Butterfly valve
Plate valve
212
11 Pneumatic Down-the-Hole Hammer