Nominal size
outside
diameter
Thickness
Length
Weight
Rod coupling
D(mm)
t(mm)
L(m)
(kg/3m)
Inside diameter (H)
(mm)
※50 50.0 6.5  3.0 1.5 1.0 0.5   22.0 22
42 42.0 5.0 14.7 19
40.5 40.5 4.8 13.3 17
33.5 33.5 5.3 11.3 13
※50mm rods are available in JIS and KOKEN standards.
 KOKEN standard rods will be delivered unless JIS is specified.
 
DCDMA standard
Nominal size
outside
diameter
Thickness
Length
Weight
Rod coupling
Remarks 
D(mm)
t(mm)
L(m)
(kg/3m)
Inside diameter (H)
(mm)
HW 88.9 5.55 3 38.0 60 Upset
NW 66.7 8 3.0 1.5 1.0 0.5 36.0 34.9 Parallel
NW 66.7 5 3 25.7 34.9 Upset
BW 54 8 3.0 1.5 1.0 0.5 25.6 19 Parallel
BW 54 5 3 18.7 19 Upset
AW 43.6 6.05 3.0 1.5 1.0 0.5 19.3 15.8 Parallel
AW 43.6 4.75 3 13.0 15.8 Upset
EW 35 5.75 3.0 1.5 1.0 0.5 13.7 11 Parallel
RW(XRT) 27.8 4.65 3.0 1.5 1.0 0.5 8.0 11 Parallel
KOKEN standard
Nominal size
outside
diameter
Thickness
Length
Weight
Rod coupling
Remarks 
D(mm)
t(mm)
L(m)
(kg/3m)
Inside diameter (H)
(mm)
F14H 139.8 10    6.0 3.0 1.5 1.0    116.0 83 4 IF.API
F14L 139.8 7 92.0 83 4 IF.API
F12 127 8 82.0 80 KOKEN taper thread
F10 101.6 7 58.0 55 KOKEN taper thread
F10B 101.6 7 60.0 50 2-7/8 IF.API
F9B 88.9 7.25 50.0 44 2-7/8 IF.API
F7B 73.1 7.55 39.2 35 2-1/8 IF.DCDMA
Type
outside
diameter
Thickness
Length
Weight
Metal bit
D(mm)
t(mm)
L(m)
(kg/3m)
Set inside
diameter

(mm)
Set outside
diameter

(mm)
180mm 180.0 6.0  3.0  1.5
 1.0  0.3
77.2 164 186
144mm 144.0 4.5 (5.25) 46.4 (54.0) 129 146
129mm 129.0 4.5 (5.25) 41.4 (48.0) 114 131
119mm 119.0 4.5 38.1 104 120
114mm 114.0 4.5 (5.25) 36.4 (42.2) 99 116
99mm 99.0 4.0 (5.25) 28.1 (36.4) 84 101
84mm 84.0 3.5 (4.75) 20.8 (27.8) 70 86
74mm 74.0 3.5 (4.75) 18.3 (24.3) 60 76
64mm 64.0 3.5 (4.75) 15.7 (20.8) 50 66
54mm 54.0 3.5 (4.75) 13.1 (17.3) 40 56
44mm 44.0 3.5 (4.75) 10.5 (13.8) 30 46
35mm 35.0 (34) 5.0 (3.75) 9.8 (8.4) 22 36
NX 74.0 5.5 27.9 54.7 74.8
BX 58.0 5.5 21.3 42.0 59.2
AX 46.0 4.0 12.4 30.1 47.4
EX 36.5 4.5 10.6 21.5 37.1
RW 〔XRT〕 28.0 4.0 7.1 18.7 29.3
KOKEN standard “STH” type (for medium hard to hard rock)
Nominal size
36
46
56
66B
76
86
EX
AX
BX
NX
Set bit outside diameter (mm) 36 46 56 66 76 86 37.1 47.4 59.2 74.8
Set bit inside diameter (mm) 22 32 42 51 62 72 21.5 30.1 42.1 54.7
Outer tube outside diameter (mm) 35 45 55 65 75 85 36.5 46.8 58 73.8
Length (m) 1.5 3.0         
KOKEN standard “SK-3” type
(for fractured rock & soft rock drilling with mud water)
Nominal size
46
56
66
76
86
101
116
131
146
Set bit outside diameter (mm) 46 56 66 76 86 101 116 131 146
Set bit inside diameter (mm) 24 34 38 48 56 72 86 101 116
Outer tube outside diameter (mm) 44 54 64 74 84 99 114 129 144
Length (m) 1.5 3.0
Type
Outside
diameter
Inside
diameter
Thickness
Length
Weight
D(mm)
D(mm)
t(mm)
L(m)
(kg/3m)
142mm 142.0 133.0 4.5  3.0
 1.5
 1.0
 0.5
45.9
127mm 127.0 118.0 4.5 40.8
112mm 1120 105.0 3.5 28.0
97mm 97.0 90.0 3.5 24.3
83mm 83.0 77.0 3.0 17.8
73mm 73.0 67.0 3.0 15.5
63mm 63.0 57.0 3.0 13.3
53mm 53.0 47.0 3.0 11.1
43mm 43.0 37.0 3.0 8.9
HX・HW 114.3 101.6 6.35 49.8
NX・NW 88.9 76.2 6.35 38.7
BX・BW 73.0 60.3 6.35 31.8
AX・AW 57.1 48.4 4.35 17.0
EX・EW 46.0 38.1 3.95 12.0
XRT・RW 36.5 30.1 3.2 8.24
 
 
Model
Suitable rods
HW-4-2 33.5, 40.5, 50, RW, EW, AW, KAQ
HW-5 50, AW, BW, NW, KAQ, KBQ, KNQ, S-series rods
HW-7-2 NW, KNQ, KHQ, K116Q, F7, F9, F10, F12, S-series rods
 
 
Model
Suitable rods
Hoisting capacity (ton)
RGB-2.5-2 40.5, 50, EW, AW, KAQ, KBQ 2.5
RGB-6-3 40.5, 50, EW, AW, BW, NW, KAQ, KBQ, KNQ, F7, F9, F10, 57S 6
RGB-11 BW, NW, HW, KNQ, KHQ, F7, F9, F10, F12, 76.5S, 96.5S 11
RGB-15 HW, KNQ, KHQ, K116Q, F7, F9, F10, F12, 76.5S, 96.5S, 117S 15
RGB-20 KNQ, KHQ, K116Q, F7, F9, F10, F12, 76.5S, 96.5S, 117S 20
RGB-25 KHQ, K116Q, F9, F10, F12, 96.5S, 117S 25
RGB-45 KHQ, K116Q, F9, F10, F12, 96.5S, 117S 45
 
 
Model
TRB-11
TRB-15
TRB-20
TRB-25
TRB-35
TRB-45
Capacity(ton) 11 15 20 25 34 45
Pulley 1 1 1 2 2 3
   
 
Model
Suitable rods
Hoisting capacity
ton
HP-2.5 40.5, 50, AW, BW, NW, HW, F7, F9, F10, KAQ, KBQ 2.5
HP-6  50, AW, BW, NW, F7, F9, F10, F12,
KAQ, KBQ, KNQ, KHQ, K116Q

57S, 76.5S, 96.5S, 117S
6
HP-11 11
HP-15 15
HP-20 20
HP-25 25
HP-30 30
 
 
Model
33.5
40.5
50
60
RH-6 
Sharrow
holes
Deep
holes
Sharrow
holes
Deep
holes
Sharrow
holes
Deep
holes
Sharrow
holes
Deep
holes
Capacity
(ton)
0.3 1.5 0.3 3.0 2.0 5.0 4.0 7.0 6.0
Suitable
rods
33.5 
XRT、EW
 KEQ 
40.5, 42, 50
AW KAQ
50, AW, BW
 KAQ KBQ   
60, BW, NW
 KBQ, KNQ
 57-S 
HW, KNQ, KHQ
F7, F9, F10
76.5-S, 96.5-S
Q series
Nominal size
KA-Q
KB-Q
KN-Q
KH-Q
K116Q
※Hole diameter
  (Set reamer outside diameter) (mm)
48.0 59.9 75.8 98.6 116.7
※Set bit outside diameter (mm) 47.6 59.5 75.3 97.5 116.0
※Set bit inside diameter (mm) 27.0 36.5 47.6 63.5 82.0
Outer tube outside diameter (mm) 46.0 57.2 73.0 92.1 112.0
Outer tube inside diameter (mm) 36.5 46.0 60.0 77.8 97.0
Inner tube outside diameter (mm) 32.5 42.9 55.6 73.0 92.0
Inner tube inside diameter (mm) 28.6 38.1 50.0 66.7 85.0
Drill rod outside diameter (mm) 44.5 55.6 70.0 88.9 110.0
Drill rod inside diameter (mm) 35.0 46.0 60.0 78.0 97.0
Weight ( Core barrel ) (Kg/3m) 25.5 40.0 64.8 102.0 145.0
※※Weight ( Drill rod ) (Kg/3m) 14.0 18.0 24.0 33.6 49.8
※ Oversize is recommended for deeper hole drilling.
※※ Special rods for deeper holes are also available.
 
Triple core tube (Q-C2 type)
Model
KBQ-C2
KNQ-C2
KHQ-C2
Set reamer outside diameter (mm) 59.9 75.8 98.6
Set bit outside diameter (mm) 59.5 75.3 97.5
Set bit inside diameter (mm) 33.4 44.5 60.3
 
Triple core tube (Q-T type)
Model
KBQ-T
KNQ-T
KHQ-T
Set reamer outside diameter (mm) 59.9 75.8 98.6
Set bit outside diameter (mm) 59.5 75.3 97.5
Set bit inside diameter (mm) 33.4 44.5 60.3
 
Wire line hoistsz
Model 
WLH-4S-4
WLH-8
Drum diameter mm 120 140
Rope capacity m 1,200(6mm wire) 3,000(6mm wire)
Power unit ( motor ) kW -P 2.2-4 3.7-4 7.5-4
Hoisting capacity kN 1.6-16.0 1.6-16.0 1.1-13.1
Hoisting speed  m/min  8-105
(3-speed
  change)
13-140
(3-speed
  change)
25-315
(4-speed
  change)
Demensions(LxWxH) mm 1,130 x 400 x 1,000 1,840 x 560 x 1,150
Weight
(with power unit)
kg 160 170 550
 
Derricks ( Vertical drilling )
Model
Material
Load capacity ( ton )
Height ( m )
SDP-6 Steel-pipe 3 6
SDP-9 Steel-pipe 5 9
SDA-12 Structural steel 20 12
SDA-20B Structural steel 40 20
SDA-23 Structural steel 50 23
SDA-28 Structural steel 50 28
 
Tripods ( Inclined drilling )
Model
Material
Load capacity ( ton )
PD-9.5A Steel-pipe 10
PD-9.5K-C Steel-pipe 9
Rod coupling tap

Rod inside tap &
Rod outside tap

Core barrel / Casing tap
 
Rod / casing band
 
Drive hammer with chain
     
 
 
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