Click image to view original image
| CROWN PROFILES | |
 |
Extended channel flushing *Standard profile-general purpose design *Suitable for mixed formations containing broken and competent zones *Suitable for a broad range of formations |
|
Jet *High performance “free cutting”bit *High productivity *Suitable for hard/competent formations |
| |
Face discharge *Designed to minimize flushing of core sample *Suitable for broken/granular formations |
|
Wheel gear *Speed performance *High productivity *Suitable for hard/competent formations |
|
Ball *Suitable for mixed formations containing broken and competent zones *Suitable for a broad range of formations |
| CROWN HEIGHT | |
| Short depth holes | 7mm |
| Short to medium depth holes | 10mm |
| Deep holes | 14mm |
| FEATURES&BENEFITS |
|
* Less sensitive to abuse for high sustainability and cost efficiency |
| * Matrices for a wide range of formations, easy bit selection |
| * Standardized design makes the bit range competitive and cost effective |
| STANDARD SPECIFICATION | |||||||
| ITEM | DIAMOND BIT | REAMING SHELL | |||||
| Swedish Metric T2 Series |
Size | Bit-set OD | Bit-set ID | ||||
| mm | inch | mm | inch | mm | inch | ||
| 36 | 36.0 | 1.417 | 22.0 | 0.866 | 36.3 | 1.429 | |
| 46 | 46.0 | 1.811 | 32.0 | 1.260 | 46.3 | 1.823 | |
| 56 | 56.0 | 2.205 | 42.0 | 1.654 | 56.3 | 2.217 | |
| 66 | 66.0 | 2.598 | 52.0 | 2.047 | 66.3 | 2.610 | |
| 76 | 76.0 | 2.992 | 62.0 | 2.441 | 76.3 | 3.004 | |
| 86 | 86.0 | 3.386 | 72.0 | 2.835 | 86.3 | 3.398 | |
| 101 | 101.0 | 3.976 | 84.0 | 3.307 | 101.3 | 3.988 | |
| Swedish T Series |
TAW | 47.6 | 1.875 | 23.2 | 1.31 | 48.0 | 1.89 |
| TBW | 59.5 | 2.345 | 44.9 | 1.77 | 59.9 | 2.36 | |
| TNW | 75.3 | 2.965 | 60.5 | 2.38 | 75.7 | 2.98 | |
| APPLICATION | |
| Application 1 | Soft to medium hard rock with abrasive and fractured to competent formations Matrix series 1-4 |
| Application 2 | Medium hard to hard rock with slightly abrasive and slightly broken to competent formations Matrix series 5-8 |
| Application 3 | Hard to very hard rock with competent formations Matrix series 9-10 |
| MATRIX SERIES | ||
| Rock Group | Formation Description | Rock Type |
| 1-4 | Soft to medium hard Very abrasive to slightly abrasive Very fractured to slightly broken |
Unmetamorphosed or weakly metamorphosed shales, Sandstone and limestone |
| 5 | Medium hard Abrasive Moderately fractured to slightly broken |
Limestone and dolomite. Weathered granite and gneiss. Serpentinite and metaperidotite. |
| 6 | Medium hard Moderately abrasive Moderately fractured to slightly broken |
Unmetamorphosed or weakly metamorphosed diorite, Gabbro, peridotite and gneiss. Basalt, andesite. |
| 7 | Medium hard - hard Moderately abrasive Slightly fractured to competent |
metabasalt, amphibolite. metamorphosed diorite and gabbro. Diabase. |
| 8 | Hard Slightly abrasive Competent |
Quartz rich skarn. Granite and pegmatite |
| 9 | Very hard Slightly abrasive Very competent |
metamorphosed granitic rock and quartz rich gneiss. |
| 10 | Extremely hard Non-abrasive, fine grained Very competent |
Chert and jasperite. Quartzite. Highly metamorphosed volcanic. |
