Surface set
Set Diameters for Core Bits
The term “set diameter” refers to the dimension of the outside or inside diameter of the matrix body on a core bit on which diamonds have been physically set in order to preserve this dimension during drilling. The specifications for set diameter tolerances to which IDP manufactures core bits are given in the tables below
| |
Inch |
Mm |
Inch |
Mm |
| AQ |
1.880/1.870 |
47.75 / 47.50 |
1.067/1.057 |
27.10/26.85 |
| AWT |
1.880/1.870 |
47.75 / 47.50 |
1.190/1.180 |
30.22/29.97 |
| BQ |
2.350/2.340 |
59.69 / 59.44 |
1.438/1.428 |
36.52/36.27 |
| BQ3 |
2.350/2.340 |
59.69 / 59.44 |
1.325/1.315 |
33.65/33.40 |
| BWT |
2.350/2.340 |
59.69 / 59.44 |
1.755/1.745 |
44.58/44.32 |
| NQ |
2.970/2.960 |
75.44 / 75.19 |
1.880/1.870 |
47.75/47.50 |
| NQ2 |
2.970/2.960 |
75.44 / 75.19 |
2.000/1.990 |
50.80/50.55 |
| NQ3 (NQTT) |
2.970/2.960 |
75.44 / 75.19 |
1.780/1.770 |
45.21/44.96 |
| NMLC |
2.970/2.960 |
75.44 / 75.19 |
2.052/2.042 |
52.12 /51.87 |
| NWG, NWM, NX |
2.970/2.960 |
75.44 / 75.19 |
2.160/2.150 |
54.86/54.61 |
| NWT |
2.970/2.960 |
75.44 / 75.19 |
2.318/2.308 |
58.87/58.62 |
| HQ |
3.770/3.755 |
95.76 / 95.38 |
2.505/2.495 |
63.63/63.38 |
| HQ3 (HQTT) |
3.770/3.755 |
95.76 / 95.38 |
2.411/2.401 |
61.24/60.99 |
| HMLC |
3.897/3.882 |
98.98 / 98.60 |
2.505/2.495 |
63.63/63.38 |
| HWT |
3.770/3.755 |
95.76 / 95.38 |
2.797/2.787 |
71.04/70.79 |
| HWG, HWM, HX |
3.897/3.882 |
98.98 / 98.60 |
3.005/2.995 |
76.33/76.08 |
| HWF (Long Type) |
3.912/3.897 |
99.36 / 98.98 |
3.005/2.995 |
76.33/76.08 |
| PWF (Short Type) |
4.735/4.715 |
120.27/119.76 |
3.635/3.620 |
92.33 /91.95 |
| PWF (Long Type) |
4.755/4.740 |
120.78/120.40 |
3.635/3.620 |
92.33 /91.95 |
PWF Coreline
(Long Type) |
4.755/4.740 |
120.78/120.40 |
3.430/3.420 |
87.13 /86.88 |
| SWF (Short Type) |
5.735/5.715 |
145.67/145.16 |
4.447/4.432 |
112.95/112.57 |
| SWF (Long Type) |
5.755/5.740 |
146.18/145.80 |
4.447/4.432 |
112.95/112.57 |
SWF Coreline
(Long Type) |
5.755/5.740 |
146.18/145.80 |
4.220/4.205 |
107.19/106.81 |
|
| |
Inch |
Mm |
Inch |
Mm |
| T6-76 |
2.997/2.987 |
76.12 / 75.87 |
2.249/2.239 |
57.12 / 56.87 |
| T6-86 |
3.391/3.381 |
86.13 / 85.88 |
2.643/2.633 |
67.13 / 66.88 |
| T6-101 |
3.981/3.971 |
101.12/100.87 |
3.115/3.105 |
79.12 / 78.87 |
| T6-116 |
4.575/4.560 |
116.20/115.82 |
3.667/3.657 |
93.14 / 92.89 |
| T6-131 |
5.165/5.150 |
131.19/130.81 |
4.257/4.247 |
108.13/107.88 |
| T6-146 |
5.755/5.740 |
146.18/145.80 |
4.847/4.837 |
123.11/122.86 |
|
| |
Inch |
Mm |
Inch |
Mm |
| 2-3/4x3-7/8DCDMA |
3.845/3.835 |
97.66 / 97.41 |
2.695/2.685 |
68.45 / 68.20 |
| 4x5-1/2DCDMA |
5.440/5.430 |
138.18/137.92 |
3.975/3.965 |
100.97/100.71 |
| 6x7-A3/4DCDMA |
7.660/7.650 |
194.56/194.31 |
5.975/5.965 |
151.77/151.51 |
|
| Max |
Min |
Max |
Min |
Max |
Min |
| E |
1554 |
932 |
1243 |
- |
- |
- |
| A |
1222 |
733 |
978 |
244 |
- |
- |
| B |
977 |
586 |
782 |
195 |
293 |
68 |
| N |
773 |
464 |
618 |
155 |
232 |
54 |
| H |
609 |
366 |
487 |
122 |
183 |
43 |
| P |
477 |
286 |
382 |
95 |
143 |
33 |
| 36mm |
1617 |
970 |
1294 |
- |
- |
- |
| 46mm |
1266 |
759 |
1012 |
253 |
- |
- |
| 56mm |
1039 |
624 |
832 |
208 |
312 |
73 |
| 66mm |
882 |
529 |
706 |
176 |
265 |
62 |
| 76mm |
766 |
460 |
613 |
153 |
230 |
54 |
| 86mm |
677 |
406 |
541 |
135 |
203 |
47 |
| 101mm |
576 |
346 |
461 |
115 |
173 |
40 |
| 116mm |
502 |
301 |
401 |
100 |
151 |
35 |
| 131mm |
444 |
267 |
356 |
89 |
133 |
31 |
| 146mm |
399 |
239 |
319 |
80 |
120 |
28 |
|
| |
Minimum |
Maximum |
| Impregnated Diamond |
108 metres /minute |
180 metres /minute |
| Surface-Set Diamond |
180 feet / minute |
480 feet / minute |
Tungsten-Carbide
(“Saw-Tooth” Type) |
42 feet / minute |
180 feet / minute |
Tungsten-Carbide
(“Saw-Tooth” Type) |
12 metres / minute |
54 metres / minute |
|
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