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small-product Item Description Part Number
1、Back adaptor 7903020
2、Check Valve 7903070
3、Spring 7903080
4、Pressure Bearing Washer 7903190
5、O-Ring 7903210-2
6、Air Distribution Seat 7903090
7、Inner Cylinder 7903060
8、Outer Cylinder 7903100
9、Piston 7903010
10、O-Ring 7903210-1
11、Chuck Ring 7903040
12、Chuck Sleeves 7903050
13、Drill Bit

 

Technical Parameters
Description MD79 MD79-
COP32
MD79-
QL30
MD79-
XL3
MD79-
COP34
MD79-
M390
MD79-
DHD3.5
Product Code MDH790301 MDH790302 MDH790303 MDH790304 MDH790305 MDH790306 MDH790307
Bit Shank MD79 COP32 QL30 XL3 COP34 M390 DHD3.5
Thread Connection API 2 3/8” REG PIN
Outside Connection
(mm)
79
Length without Bit (mm) 991 991 985 985 991 985 991
Weight(kg) 28 28 27 27 28 27 27
Flat Wrench (mm) 57
Rec.Hole Size
(mm)
90-110
Working Pressure (psi) 152.3-348
Impact Frequency at 246.5 psi(Hz) 28
Normal Axial Pressure (kN) 5.1
Recommended Rotation Speed (r/min) 30-50
Air Consumption
(m²/min)
152.3 psi 4.4
246.5 psi 7.3
348 psi 13.8

 

MD68 MD79 DHD3.5 COP32
small-product small-product small-product small-product
8 Splines 8 Splines 8 Splines 8 Splines
COP34 MACH303 MISSION 3.5 BR 33
small-product small-product small-product small-product
8 Splines 8 Splines 8 Splines 8 Splines
Examples for Ordinary Bits
Flat, spherical (Other designs of faces and inserts are available)
Bit Dia.(mm) Qty.×Button Dia.(mm) Qty.Air Holes Weight (kg) Part No.
Outer Front
85 6×13 4×12 2 4.8 MDB0851002
90 6×14 4×13 2 4.9 MDB0901002
95 6×14 4×13 2 5.2 MDB0951002
100 6×14 5×13 2 5.8 MDB1001102
102 6×14 5×13 2 5.9 MDB1021102
105 6×14 5×13 2 6.2 MDB1051102
115 8×14 7×13 2 6.7 MDB1151502
125 8×14 7×13 2 7.2 MDB1251502