Core bits and Reaming shells >> Dimensions of Core Bits
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Product Availability

We are capable of manufacturing any core bit listed in the tables below.

The key to the “Availability” columns are as follows:
“Imp.” represents Impregnated Diamond Type

“S.S.” represents Surface Set Diamond Type

“T.C.” represents Tungsten Carbide Type

“PDC” represents Polycrystalline Diamond Compact Type

“TSP” represents Thermally Stable Diamond Polycrystalline

“E.P.” represents Electroplated Diamond Type

 
A-Gauge Core Bits
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
AQ
1.880 / 1.870
47.75 / 47.50
1.067 / 1.057
27.10 / 26.85
Yes
Yes
Yes
Yes
Yes
Yes
AQ-RSG
1.895 / 1.885
48.13 / 47.88
1.067 / 1.057
27.10 / 26.85
Yes
Yes
Yes
Yes
Yes
Yes
AWG (AX)
1.880 / 1.870
47.75 / 47.50
1.190/ 1.180
30.23 / 29.97
Yes
Yes
Yes
Yes
Yes
Yes
AWM
1.880 / 1.870
47.75 / 47.50
1.190/ 1.180
30.23 / 29.97
Yes
Yes
Yes
Yes
Yes
Yes
AWT
1.880/1.870
47.75/47.50
1.286/1.276
32.66/32.41
Yes
Yes
Yes
Yes
Yes
Yes
LTK48
1.880 / 1.870
47.75 / 47.50
1.394 / 1.384
35.40 / 35.15
Yes
Yes
Yes
Yes
Yes
Yes

B-Gauge Core Bits
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
BQ
2.350 / 2.340
59.69 / 59.44
1.438 / 1.428
36.52 / 36.27
Yes
Yes
Yes
Yes
Yes
Yes
BQ-RSG
2.365 / 2.355
60.07 / 59.82
1.438 / 1.428
36.52 / 36.27
Yes
Yes
Yes
Yes
Yes
Yes
BQ-2.400
2.405 / 2.395
61.09 / 60.83
1.438 / 1.428
36.52 / 36.27
Yes
Yes
Yes
Yes
Yes
Yes
BQ3
2.350 / 2.340
59.69 / 59.44
1.325 / 1.315
33.65 / 33.40
Yes
Yes
Yes
Yes
Yes
Yes
BWG, BWM, BX
2.350 / 2.340
59.69 / 59.44
1.660 / 1.650
42.16 / 41.91
Yes
Yes
Yes
Yes
Yes
Yes
LTK60
2.350 / 2.340
59.69 / 59.44
1.742 / 1.732
44.25 / 44.00
Yes
Yes
Yes
Yes
Yes
Yes
BWT
2.350 / 2.340
59.69 / 59.44
1.755 / 1.745
44.58 / 44.32
Yes
Yes
Yes
Yes
Yes
Yes
TBW
2.350 / 2.340
59.69 / 59.44
1.785 / 1.775
45.34 / 45.09
Yes
Yes
Yes
Yes
Yes
Yes

N-Gauge Core Bits
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
NQ
2.970 / 2.960
75.44 / 75.19
1.880 / 1.870
47.75 / 47.50
Yes
Yes
Yes
Yes
Yes
Yes
NQ-RSG
2.985 / 2.975
75.82 / 75.57
1.880 / 1.870
47.75 / 47.50
Yes
Yes
Yes
Yes
Yes
Yes
NQ-3.032
3.037 / 3.027
77.14 / 76.89
1.880 / 1.870
47.75 / 47.50
Yes
Yes
Yes
Yes
Yes
Yes
NQ2
2.970 / 2.960
75.44 / 75.19
2.000 / 1.990
50.80 / 50.55
Yes
Yes
Yes
Yes
Yes
Yes
NQ2-RSG
2.985 / 2.975
75.82 / 75.57
2.000 / 1.990
50.80 / 50.55
Yes
Yes
Yes
Yes
Yes
Yes
NQ3 /NQTT
2.970 / 2.960
75.44 / 75.19
1.780 / 1.770
45.21 / 44.96
Yes
Yes
Yes
Yes
Yes
Yes
NQ3-RSG
2.985 / 2.975
75.82 / 75.57
1.780 / 1.770
45.21 / 44.96
Yes
Yes
Yes
Yes
Yes
Yes
NQ3-3.032
3.037 / 3.027
77.14 / 76.89
1.780 / 1.770
45.21 / 44.96
Yes
Yes
Yes
Yes
Yes
Yes
NMLC
2.970 / 2.960
75.44 / 75.19
2.052 / 2.042
52.12 / 51.87
Yes
Yes
Yes
Yes
Yes
Yes
NWG, NWM, NX
2.970 / 2.960
75.44 / 75.19
2.160 / 2.150
54.86 / 54.61
Yes
Yes
Yes
Yes
Yes
Yes
NWT
2.970 / 2.960
75.44 / 75.19
2.318 / 2.308
58.87 / 58.62
Yes
Yes
Yes
Yes
Yes
Yes
TNW
2.970 / 2.960
75.44 / 75.19
2.394 / 2.384
60.80 / 60.55
Yes
Yes
Yes
Yes
Yes
Yes

H-Gauge Core Bits
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
HQ
3.770 / 3.755
95.76 / 95.38
2.505 / 2.495
63.63 / 63.38
Yes
Yes
Yes
Yes
Yes
Yes
HQ-RSG
3.790 / 3.775
96.27 / 95.89
2.505 / 2.495
63.63 / 63.38
Yes
Yes
Yes
Yes
Yes
Yes
HQ-3.830
3.840 / 3.825
97.54 / 97.16
2.505 / 2.495
63.63 / 63.38
Yes
Yes
Yes
Yes
Yes
Yes
HQ-3.895
3.897 / 3.882
98.98 / 98.60
2.505 / 2.495
63.63 / 63.38
Yes
Yes
Yes
Yes
Yes
Yes
HQ3 (HQTT)
3.770 / 3.755
95.76 / 95.38
2.411 / 2.401
61.24 / 60.99
Yes
Yes
Yes
Yes
Yes
Yes
HQ3-RSG
3.790 / 3.775
96.27 / 95.89
2.411 / 2.401
61.24 / 60.99
Yes
Yes
Yes
Yes
Yes
Yes
HQ3-3.830
3.840 / 3.825
97.54 / 97.16
2.411 / 2.401
61.24 / 60.99
Yes
Yes
Yes
Yes
Yes
Yes
HQ3-3.895
3.897 / 3.882
98.98 / 98.60
2.411 / 2.401
61.24 / 60.99
Yes
Yes
Yes
Yes
Yes
Yes
HMLC
3.897 / 3.882
98.98 / 98.60
2.505 / 2.495
63.63 / 63.38
Yes
Yes
Yes
Yes
Yes
Yes
HWF -Long
3.912 / 3.897
99.36 / 98.98
3.005 / 2.995
76.33 / 76.08
Yes
Yes
Yes
Yes
Yes
Yes
HWF -Short
3.897/3.882
98.98/98.60
3.005/2.995
76.33/76.08
Yes
Yes
Yes
Yes
Yes
Yes
HWG,HX
3.897/3.882
98.98/98.60
3.005/2.995
76.33/76.08
Yes
Yes
Yes
Yes
Yes
Yes
HWT
3.897/3.882
98.98/98.6
3.192/3.182
81.08/80.82
Yes
Yes
Yes
Yes
Yes
Yes

P-Gauge Core Bits
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
PQ
4.815 / 4.795
122.30 / 121.80
3.350 / 3.340
85.09 / 84.84
Yes
Yes
Yes
Yes
Yes
Yes
PQ3
4.815 / 4.795
122.30 / 121.80
3.275 / 3.265
83.18 / 82.93
Yes
Yes
Yes
Yes
Yes
Yes
PWF-Long
4.755 / 4.740
120.78 / 120.40
3.635 / 3.620
92.33 / 91.95
Yes
Yes
Yes
Yes
Yes
Yes
PWF-Short
4.735 / 4.715
120.27 / 119.76
3.635 / 3.620
92.33 / 91.95
Yes
Yes
Yes
Yes
Yes
Yes

S-Gauge Core Bits
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
SWF -Long
5.755 / 5.740
146.18 / 145.80
4.447 / 4.432
112.95 / 112.57
Yes
Yes
Yes
Yes
Yes
Yes
SWF-Short
5.735 / 5.715
145.67 / 145.16
4.447 / 4.432
112.95 / 112.57
Yes
Yes
Yes
Yes
Yes
Yes

U-Gauge Core Bits
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
UWF -Long
6.880 /6.860
174.75/174.2
5.515/5.495
140.08/139.5
Yes
Yes
Yes
Yes
Yes
Yes
UWF-Short
6.855/6.825
174.12/173.3
5.515/5.495
140.08/139.5
Yes
Yes
Yes
Yes
Yes
Yes

Z-Gauge Core Bits
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
ZWF -Long
7.880/7.860
200.15/199.6
6.515/6.495
165.48/164.9
Yes
Yes
Yes
Yes
Yes
Yes
ZWF-Short
7.855/7.825
199.52/198.7
6.515/6.495
165.48/164.9
Yes
Yes
Yes
Yes
Yes
Yes

T, TT,T2& TB Series Metric Core Bits
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
T36
1.422 / 1.412
36.12 / 35.87
0.859 / 0.849
21.82 / 21.57
Yes
Yes
Yes
Yes
Yes
Yes
TT46
1.818 / 1.808
46.18 / 45.92
1.394 / 1.384
35.40 / 35.15
Yes
Yes
Yes
Yes
Yes
Yes
T2-46
1.818 / 1.808
46.18 / 45.92
1.253 / 1.243
31.82 / 31.57
Yes
Yes
Yes
Yes
Yes
Yes
TB56
2.220
56.3
1.64
41.7
Yes
Yes
Yes
Yes
Yes
Yes
TT56
2.210 / 2.200
56.13 / 55.88
1.788 / 1.778
45.41 / 45.16
Yes
Yes
Yes
Yes
Yes
Yes
T2-56
2.210 / 2.200
56.13 / 55.88
1.647 / 1.637
41.83 / 41.58
Yes
Yes
, ,
Yes
Yes
Yes
Yes
T2-66
2.603 / 2.593
66.12 / 65.87
2.040 / 2.030
51.81 / 51.56
Yes
Yes
Yes
Yes
Yes
Yes
T2-76
2.997 / 2.987
76.12 / 75.87
2.434 / 2.424
61.82 / 61.57
Yes
Yes
Yes
Yes
Yes
Yes
T2-76
Coreline
2.997 / 2.987
76.12 / 75.87
2.288 / 2.278
58.12 / 57.87
Yes
Yes
Yes
Yes
Yes
Yes
T2-86
3.391/ 3.381
86.13 / 85.88
2.828 / 2.818
71.83 / 71.58
Yes
Yes
Yes
Yes
Yes
Yes
T2-86
Coreline
3.391/ 3.381
86.13 / 85.88
2.682 / 2.672
68.13 / 67.88
Yes
Yes
Yes
Yes
Yes
Yes
T2-101
3.981/ 3.971
101.12 / 100.87
3.300 / 3.290
83.82 / 83.57
Yes
Yes
Yes
Yes
Yes
Yes
T2-101
Coreline
3.981/ 3.971
101.12 / 100.87
3.155 / 3.145
80.13 / 79.88
Yes
Yes
Yes
Yes
Yes
Yes

T6 Series Metric Core Bits
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
T6-76
2.997 / 2.987
76.12 / 75.87
2.249 / 2.239
57.12 / 56.87
Yes
Yes
Yes
Yes
Yes
Yes
T6-86
3.391 / 3.381
86.13 / 85.88
2.643 / 2.633
67.13 / 66.88
Yes
Yes
Yes
Yes
Yes
Yes
T6-101
3.981 / 3.971
101.12 / 100.87
3.115 / 3.105
79.12 / 78.87
Yes
Yes
Yes
Yes
Yes
Yes
T6-116
4.575 / 4.560
116.20 / 115.82
3.667 / 3.657
93.14 / 92.89
Yes
Yes
Yes
Yes
Yes
Yes
T6-131
5.165 / 5.150
131.19 / 130.81
4.257 / 4.247
108.13 / 107.88
Yes
Yes
Yes
Yes
Yes
Yes
T6-146
5.755 / 5.740
146.18 / 145.80
4.847 / 4.837
123.11 / 122.86
Yes
Yes
Yes
Yes
Yes
Yes

T6S Series Metric Core Bits
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
T6S-76
3.009 / 2.999
76.43 / 76.18
1.883 / 1.873
47.83 / 47.58
Yes
Yes
Yes
Yes
Yes
Yes
T6S-86
3.403 / 3.393
86.43 / 86.18
2.277 / 2.267
57.83 / 57.58
Yes
Yes
Yes
Yes
Yes
Yes
T6S-101
3.993 / 3.983
101.43 / 101.18
2.828 / 2.818
71.83 / 71.58
Yes
Yes
Yes
Yes
Yes
Yes
T6S-116
4.586 / 4.571
116.48 / 116.10
3.379 / 3.369
85.83 / 85.58
Yes
Yes
Yes
Yes
Yes
Yes
T6S-131
5.177 / 5.162
131.48 / 131.10
3.970 / 3.960
100.83 / 100.58
Yes
Yes
Yes
Yes
Yes
Yes
T6S-146
5.767 / 5.752
146.48 / 146.10
4.560 / 4.550
115.83 / 115.58
Yes
Yes
Yes
Yes
Yes
Yes

B Series (ISO 3552-1) Metric Core Bits
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
B36
1.422 / 1.412
36.12 / 35.87
0.859 / 0.849
21.82 / 21.57
Yes
Yes
Yes
Yes
Yes
Yes
B46
1.818 / 1.808
46.18 / 45.92
1.253 / 1.243
31.82 / 31.57
Yes
Yes
Yes
Yes
Yes
Yes
B56
2.210 / 2.200
56.13 / 55.88
1.647 / 1.637
41.83 / 41.58
Yes
Yes
Yes
Yes
Yes
Yes
B66
2.603 / 2.593
66.12 / 65.87
2.040 / 2.030
51.81 / 51.56
Yes
Yes
Yes
Yes
Yes
Yes
B76
2.997 / 2.987
76.12 / 75.87
2.434 / 2.424
61.82 / 61.57
Yes
Yes
Yes
Yes
Yes
Yes
B86
3.391 / 3.381
86.13 / 85.88
2.828 / 2.818
71.83 / 71.58
Yes
Yes
Yes
Yes
Yes
Yes
B101
3.981 / 3.971
101.12 / 100.87
3.418 / 3.408
86.82 / 86.57
Yes
Yes
Yes
Yes
Yes
Yes
B116
4.575 / 4.560
116.20 / 115.82
4.009 / 3.999
101.83 / 101.58
Yes
Yes
Yes
Yes
Yes
Yes
B131
5.165 / 5.150
131.19 / 130.81
4.599 / 4.589
116.82 / 116.57
Yes
Yes
Yes
Yes
Yes
Yes
B146
5.755 / 5.740
146.18 / 145.80
5.190 / 5.180
131.82 / 131.57
Yes
Yes
Yes
Yes
Yes
Yes

Chinese Standard Metric Core Bits for Single Tube Core Barrels
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
36
*
36.2
*
21.5
Yes
Yes
Yes
Yes
Yes
Yes
46
*
46.2
*
29.1
Yes
Yes
Yes
Yes
Yes
Yes
56
*
56.2
*
39.1
Yes
Yes
Yes
Yes
Yes
Yes
59
*
59.5
*
41.5
Yes
Yes
Yes
Yes
Yes
Yes
75
*
75.2
*
54.5
Yes
Yes
Yes
Yes
Yes
Yes
91
*
91.2
*
68.0
Yes
Yes
Yes
Yes
Yes
Yes
110
*
111.2
*
93.0
Yes
Yes
Yes
Yes
Yes
Yes
130
*
131.2
*
113.0
Yes
Yes
Yes
Yes
Yes
Yes
150
*
151.2
*
133.0
Yes
Yes
Yes
Yes
Yes
Yes
170
*
171.2
*
149.0
Yes
Yes
Yes
Yes
Yes
Yes
219
*
225.2
*
197.0
Yes
Yes
Yes
Yes
Yes
Yes
275
*
278.2
*
249.0
Yes
Yes
Yes
Yes
Yes
Yes

Chinese Standard Metric Core Bits for Double Tube Core Barrels
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
56
*
56.2
*
39.0
Yes
Yes
Yes
Yes
Yes
Yes
59
*
59.5
*
41.5
Yes
Yes
Yes
Yes
Yes
Yes
75
*
75.2
*
54.5
Yes
Yes
Yes
Yes
Yes
Yes
91
*
91.2
*
68.0
Yes
Yes
Yes
Yes
Yes
Yes

Chinese Standard Metric Core Bits for Wireline Core Barrels
Size
Outside Set Diameter
Inside Set Diameter
Availability
Inch
mm
inch
mm
Imp.
S.S.
T.C.
PDC
TSP
E.P.
59
*
59.5
*
36.0
Yes
Yes
Yes
Yes
Yes
Yes
75
*
75.2
*
49.0
Yes
Yes
Yes
Yes
Yes
Yes
91
*
91.2
*
62.0
Yes
Yes
Yes
Yes
Yes
Yes