Information
Combined Ring Bit and Casing Shoe
Model
Outer Dia. of Casing Tube
(mm)Inner Dia. of Casing Tube(mm)
Wall thickness of casing
(mm)Ring Bit Outer Dia
(mm)Ring Bit Inner Dia
(mm)Max Outer Dia of Normal Bits
(mm)Hammer Type
Weight
(kg)
For DTH Drilling
R114/6.5-80
114
101
6.5
122
80
78
COP32/COP34/DHD3.5/BR3/MACH303
11.5
R127/10-93
127
107
10
136
93
91
15
R133/10-96
133
113
10
141
96
94
COP44/DHD340/MACH44/MISSION40/ SD4/XL4/QL40
15.5
R139/10-102
139
119
10
147
102
100
19.5
R152/10-114
152
132
10
160
114
112
25
R168/10-130
168
10
148
177
130
128
COP54/DHD350/MACH50/MISSION50/ SD5/QL50
36.5
R177/10-139
177
10
157
187
139
137
43
R193/12.7-152
193
167.6
12.7
203
152
150
COP62/COP64/DHD360/MISSION60/SD6/XL6/QL60/TD150
49
R219/12.7-175
219
193.6
12.7
232
175
173
61
R244/12.7-198
244
218.6
12.7
254
198
196
COP84/DHD380/SD8/QL80/TS180
78
R254/12.7-205
254
228.6
12.7
266
205
203
90
RP273/12.7-224
273
247.6
12.7
285
224
222
130
R323/12.7-271
323
297.6
12.7
338
271
269
188
R406/12.7-350
406
380.6
12.7
420
350
348
DHD112/QL120/SD12/NUMA120
335
R457/12.7-376
457
431.6
12.7
477
376
374
440
R508/16-444
508
476
16
524
444
442
520
R558/16-491
558
526
16
575
491
489
QL200/SD18/NUMA180/TH18/TS18/TK18
610
R609/16-553
609
577
16
637
553
551
670
R660/16-590
660
628
16
678
590
588
780
R711/16-639
711
679
16
731
639
637
QL200S/TH32/TK24
930
R762/16-690
762
730
16
781
690
688
1070
R812/16-734
812
780
16
834
734
732
1285
R863/16-788
863
831
16
882
788
786
1450
R914/16-835
914
882
16
935
835
833
1720
R1016/16-911
1016
984
16
1033
911
909
QL300
2200
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