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Croe Bit & Reaming Shell
Synthetic diamond core bits
Diamond core bits are widely used in the fields of geological exploration, engineering-oriented, hydroelectric and building engineering. Diamond drill bit series include the bits of diffe-rent structures (Single tube bit, Do-uble tube bit and wire lin-e coring bit, etc.) and of various bit standards (domestic and foreign standards.).
Diamond reaming shell is used together with diamond drill bi-ts, maintai-ning the hole size and improving drilling stability. They can provide el-ectroplated diamond reaming shell and polycrystalline reaming shell. |
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General Bits Applications Overlap
|
SITE
FORMATION |
BIT
MATRIX |
| Hardness |
Rock Type |
Black |
Red |
Green |
Blue |
Yellow |
Gold |
Green |
Pale Green |
| Soft |
Broken
& Backfill Stratum |
|
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|
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|
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|
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|
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|
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|
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|
| Clay |
| Soft Sandstone |
| Shale |
| Medium
Hard |
Limestone |
| Reinforced Concrete |
| Dolomite |
| Porphyry |
| Andesine |
| Granite |
| Hard |
Basalt |
| Diorite |
| Diorite
Granite |
| Gneiss |
Ultra
Hard |
Granite |
| Hyolite |
| Quartz |
| Fire
Stone |
BLACK: Broken and loose backfill stratum formations, iron.
RED: Broken fractures coarser-grained medium-hard and abrasion formations.
SILVER: Slight weathering of medium-hard and hard formations.
BLUE: Coarser grained medium-hard and abrasive formations.
YELLOW: Get wick from concrete, medium-grain of abrasive and medium-hard to hard?formations.
GOLD: Hard, very hard and line-grained formations.
GREEN: Medium-hard to hard, line-grained formations.
PALE GREEN: Hard to upper-hard, line-grained formations.
Synthetic diamond Masonry bits Series
| Masonry bits arewidely used in drilling hole in reinforced concrete wall and floorslab to lay water pipe, heating radiator pipe, gas pipe and sewer. |
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Specifications of masonry bit series mm
| size |
Nominal O. D. |
20 |
26 |
32 |
38 |
45 |
52 |
57 |
63 |
76 |
| Standard
length |
250 |
250 |
320 |
320 |
320 |
320 |
320 |
320 |
320 |
| size |
Nominal O. D. |
82 |
88 |
102 |
108 |
116 |
126 |
132 |
159 |
175 |
200 |
| Standard length |
320 |
320 |
320 |
320 |
320 |
320 |
320 |
320 |
320 |
400 |
Description of synthetic diamond mining bits and reaming shells
|
Bit |
Kind |
Description |
| Double barrel bit |
Surface set |
¦Õ28,¦Õ36,¦Õ46,¦Õ59¦Õ60,¦Õ66,¦Õ75,¦Õ76,¦Õ91,¦Õ94,¦Õ110 |
| Impregnated |
| Single barrel bit |
Surface set |
¦Õ36,¦Õ46,¦Õ59,
¦Õ75,¦Õ91,¦Õ94,¦Õ110,¦Õ130,¦Õ150,¦Õ170,¦Õ200 |
| Impregnated |
| Wireline core bit |
Surface set |
¦Õ46,¦Õ47,¦Õ59,¦Õ60,
¦Õ75,1 |
| Impregnated |
| Special shape bits |
¡¡ |
|
Reaming shell |
Double barrel reaming shell |
¦Õ28,¦Õ36,¦Õ46,¦Õ47,¦Õ59,¦Õ60,¦Õ66,¦Õ75,¦Õ91,¦Õ94,¦Õ110 |
| Singlebarrel reaming shell |
¦Õ36,¦Õ46,¦Õ47,¦Õ59,¦Õ60,¦Õ75,¦Õ91,¦Õ94,¦Õ110,130,¦Õ150,¦Õ170,¦Õ200 |
| Wireline barrel reaming shell |
¦Õ46,¦Õ47,¦Õ59,¦Õ60,¦Õ75,¦Õ91 |
Standard diamond set dimensions for DZ bits and Reaming shells
| Size |
Set Bit Dimensions |
Reaming Shell Dimensions |
|
O. D. mm |
I. D. mm |
O. D. mm |
I. D. mm |
| 28 |
28 |
17 |
28.5 |
21.5 |
| 36 |
36.5 |
21.5 |
37 |
27.5 |
| 46 |
46.5 |
29 |
47 |
36.5 |
| 59 |
59.5 |
41.5 |
60 |
49 |
| 75 |
75 |
54.5 |
75.5 |
64 |
| S 75 WL |
75 |
49 |
75.5 |
62 |
| 91 |
91 |
68 |
91.5 |
79 |
| S 91 WL |
91 |
62 |
91.5 |
76 |
Craelius metric standard
|
Hole size
mm |
Number of waterways Diamy
Diaborit |
Coring bit type
I. D. mm=core
TT
T2 B
K3 |
Reaming shells
O. D. mm |
Casing
shoe bits
O. D. mm I. D. mm |
| 36 |
2
4 |
---
22
22 --- |
36.3 |
---
--- |
| 46 |
3
6 |
35.6
32
32 --- |
46.3 |
46
36.5 |
| 56 |
4
8 |
45.5
42
42 --- |
56.3 |
56
46.5 |
| 66 |
5
10 |
---
52
52 38 |
66.3 |
66
56.5 |
| 76 |
6
12 |
---
62
62 48 |
76.3 |
76
66.5 |
| 86 |
7
12 |
---
72
72 58 |
86.3 |
86
76.5 |
| 101 |
8
14 |
---
84
87 72 |
101.3 |
101
86.5 |
| 116 |
9
10 |
---
---
102 86 |
116.3 |
116
101.5 |
| 131 |
10
10 |
---
---
117 101 |
131.3 |
131
116.5 |
| 146 |
11
10 |
---
---
132 116 |
146.3 |
146
131.5 |
Casing shoe bits, casing bits and casing reamers same for DCDMA and CDDA
|
Hole Size |
Casing shoe
bits |
Casing reamers |
Casing bits |
|
O.
D.
I. D.
in.
mm
in.
mm |
in.
mm
|
O.
D.
I. D.
in.
mm
in. mm |
| XRT |
1.48
37.7
1.19 30.2 |
---
--- |
1.48
37.7
1.00 25.4 |
| EX |
1.87
47.6
1.50 38.0 |
1.89 48.0 |
1.87
47.6
1.40 35.6 |
| AX |
2.34
59.5
1.90 48.3 |
2.36 59.9 |
2.34
59.5
1.78 45.2 |
| BX |
2.96
75.3
2.37 60.2 |
2.98 75.6 |
2.96
75.3
2.21 56.2 |
| NX |
3.61
91.8
2.99 76.0 |
3.63 92.2 |
3.61
91.8
2.84 72.1 |
| HX |
4.62
117.4
3.92 99.7 |
---
--- |
4.62
117.4
3.77 95.9 |
D.C.D.M.A Standard
| Size |
Diamond
core bits |
Reaming
shells |
| Nominal
Core Diameter |
Nominal
Hole Diameter |
Set
Dimensions + - 0.005 |
Set
Dimensions + - 0.005 |
| in.
mm |
in.
mm |
O.
D.
I. D. |
O.
D.
mm |
| RW |
3/4
19.0 |
1-1/8 28.5 |
1.160
0.735 |
1.175
29.8 |
| *XRP |
7/8
21.2 |
1-5/16
33.3 |
1.295
0.875 |
1.310
33.2 |
| EX-EWG |
7/8
21.2 |
1-1/2 37.7 |
1.470
0.845 |
1.485
37.7 |
| EXM-EWM |
7/8
21.2 |
1-1/2 37.7 |
1.470
0.845 |
1.485
37.7 |
| AX-AWG |
1-1/8
30.0 |
1-7/8 48.0 |
1.875
1.185 |
1.890
48.0 |
| AXM-AWM |
1-1/8
30.0 |
1-7/8 48.0 |
1.875
1.185 |
1.890
48.0 |
| BX-BWG |
1-5/8
42.0 |
2-3/8 59.9 |
2.345
1.655 |
2.360
59.9 |
| BXM-BWM |
1-5/8
42.0 |
2-3/8 59.9 |
2.345
1.655 |
2.360
59.9 |
| NX-NWG |
2-1/8
54.7 |
3
75.7 |
2.965
2.155 |
2.980
75.7 |
| NXM-NWM |
2-1/8
54.7 |
3
75.7 |
2.965
2.155 |
2.980
75.7 |
| HX-HWG |
3 76.2 |
3-7/8 98.8 |
3.890
3.000 |
3.907
99.2 |
| 2-3/4"¡Á3-7/8" |
2-3/4
68.3 |
3-7/8 98.8 |
3.840
2.690 |
3.875
98.4 |
| 4"¡Á5-1/2" |
4
100.8 |
5-1/2 139.6 |
5.435
3.970 |
5.495
139.6 |
| 6"¡Á7-3/4" |
6
151.6 |
7-3/4 196.8 |
7.655
5.970 |
7.750
196.9 |
*Optoional Sizes
"Q" Wire line bits sizes
| Size |
Nominal
Hole Diameter |
Nominal
Core Diameter |
Std.
Set-O. D. Dimen. |
Rm.Shi.
Ste-O. D. Dimen. |
Set-I.
D.
Dimen. |
| Inches
mm |
Inches
mm |
In. ( Approx )
|
In.
( Approx ) |
In. ( Approx )
|
| AQ |
1-57/64
48.0 |
1-1/16
27.0 |
1.875 |
1.890 |
1.062 |
| BQ |
2-23/64
60.0 |
1-7/16
36.5 |
2.345 |
2.360 |
1.437 |
| NQ |
2-63/64
75.8 |
1-7/8
47.6 |
2.965 |
2.980 |
1.875 |
| HQ |
3-25/32
96.0 |
2-1/2
63.5 |
3.766 |
3.782 |
2.500 |
| PQ |
4-53/64
122.6 |
3-11/32
85.0 |
4.805 |
4.827 |
3.343 |
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