|
HIGH AIR PRESSURE WITHOUT FOOT VALVE DTH HAMMER
|
|
JESSIN offers high quality DTH hammers and the most versatile and cost effective rock drilling method.
|
|
|
ITEM DESCRIPTION
|
PART NUMBER
|
|
1、Top sub
|
JSDXA-01
|
|
2、"O" ring of top sub
|
JSDXA-02
|
|
3、Check valve
|
JSDXA-03
|
|
4、Check valve spring
|
JSDXA-04
|
|
5、Air distributor
|
JSDXA-05
|
|
6、Internal cylinder
|
JSDXA-06
|
|
7、Piston
|
JSDXA-07
|
|
8、External cylinder
|
JSDXA-08
|
|
9、Guide sleeve
|
JSDXA-09
|
|
10、"O" ring of Bit retainer ring
|
JSDXA-10
|
|
11、Bit retainer ring
|
JSDXA-11
|
|
12、Briver chuck
|
JSDXA-12
|
| |
|
|
Notice: for example JSDXA-03,if the hammer is JSD4A, "X" means 4. the check valve is JSD4A-03.
|
|
|
Standard type
|
|
|
Model specification
|
JSD3A
|
JSD4A
|
JSD5A
|
|
|
Top sub connection
|
API 2 3/8" Reg
|
API 2 3/8" Reg
|
API 2 3/8" Reg API 3 1/2" Reg
|
|
|
Chuck connection configuration
|
IR3.5
|
COP44 DHD340
|
COP54 DHD350R
|
|
|
Available bit size/mm
|
∮90-∮115
|
∮110-∮135
|
∮135-∮155
|
|
|
Length(without bit)/mm
|
888
|
1011
|
1110
|
|
|
Outside diameter/mm
|
∮82
|
∮99
|
∮125
|
|
|
Net weight(without bit)/kg
|
25
|
43
|
69
|
|
|
Impact rate
|
At 1.5Mpa,25HZ
|
At 1.7Mpa,30HZ
|
At 1.7Mpa,28HZ
|
|
|
Recommended rotation speed
|
25-40r/min
|
22-35r/min
|
20-35r/min
|
|
|
Air consumption, CFM& (M3/min)
|
Work Pressure
|
|
|
|
|
|
1MPa
|
3.8m3/min
|
6m3/min
|
7m3/min
|
|
|
1.5MPa
|
7.5m3/min
|
|
|
|
|
1.8MPa
|
|
10m3/min
|
14m3/min
|
|
|
2.4MPa
|
|
15m3/min
|
19m3/min
|
|
|
Model specification
|
JSD6A
|
JSD8A
|
JSD12A
|
|
|
Top sub connection
|
API 3 1/2" Reg
|
API 4 1/2" Reg
|
API 6 5/8" Reg
|
|
|
Chuck connection configuration
|
COP64 DHD360
|
COP84 DHD380
|
DHD112
|
|
|
Available bit size/mm
|
∮155-∮203
|
∮190-∮254
|
∮305-∮445
|
|
|
Length(without bit)/mm
|
1238
|
1359
|
1880
|
|
|
Outside diameter/mm
|
∮142
|
∮180
|
∮275
|
|
|
Net weight(without bit)/kg
|
98
|
175
|
474
|
|
|
Impact rate
|
At 1.7Mpa,25HZ
|
At 1.7Mpa,22HZ
|
At 1.7Mpa,20HZ
|
|
|
Recommended rotation speed
|
20-35r/min
|
15-25r/min
|
15-25r/min
|
|
|
Air consumption, CFM& (M3/min)
|
Work Pressure
|
|
|
|
|
|
1MPa
|
9m3/min
|
12m3/min
|
28m3/min
|
|
|
1.5MPa
|
|
|
|
|
|
1.8MPa
|
18m3/min
|
22m3/min
|
50m3/min
|
|
|
2.4MPa
|
26m3/min
|
28m3/min
|
71m3/min
|
|