Feature (Product Specifications)
The 1308 high class PDC cutters are 13.08mm diameter premium-grade diamond composite inserts with a convex (domed) surface profile, positioned at the top of the SUNGOOD TECH cutter quality hierarchy for mining applications. The high class designation indicates the use of premium synthetic diamond crystals with controlled grain size distribution and optimized sintering parameters.
Diamond layer thickness: 2-2.2mm (at center of dome).
Convex dome height: 0.3mm above perimeter.
Substrate: tungsten carbide with 8% cobalt.
Diamond volume concentration: 84% (higher than standard 75-80%).
Hardness: HRA >80.
Thermal stability: up to 750 degrees C
The convex dome concentrates force at the apex for lower WOB initiation while the high-class diamond structure provides superior wear resistance and thermal stability for demanding mining conditions.
Advantage (Performance Advantages)
The 1308 high class convex cutter combines two premium features: the convex dome geometry for lower WOB cutting initiation and the high-class diamond structure for maximum wear life. The finer 6-12 micron diamond grit with 84% concentration creates a denser, harder diamond surface that resists abrasive wear 60-70% longer than standard 1308 flat cutters. The higher thermal stability is critical for mining drag bits that operate with limited flushing, where friction heat builds up at the cutter-rock interface and can cause thermal degradation of standard diamond layers.
The convex dome adds the advantage of 15-20% lower WOB requirement for cutting initiation, which extends the usable WOB window on the drilling rig: operators can apply lower thrust while maintaining penetration rate, reducing mechanical stress on the drill string and bit body. In controlled comparisons, the high class convex cutter maintained cutting efficiency at temperatures 30 degrees C higher than standard cutters before performance degradation.
Benefit (Customer Benefits)
For mining operations in hard, abrasive formations or with limited-flushing drilling conditions, the 1308 high class convex cutter delivers the longest possible service life per cutter while reducing mechanical load on the drilling equipment. The practical benefit is three-fold: longer bit runs between changes, lower thrust requirements from the rig, and reduced cutter consumption. In hard coal measure formations with quartz partings (40-65 MPa), standard 1308 cutters on a 94mm three-wing bit typically last 200-300m. The high class convex cutter extends this to 400-600m, reducing bit changes by 50-60%. The lower WOB requirement also means the drill rig operates at 15-20% less thrust for the same penetration rate, reducing hydraulic system load and extending rig component life. For bit manufacturers, the high class convex cutter allows building premium product lines that command higher margins while delivering measurable performance improvements that justify the premium to end users.
1308 customizable Convex PDC Cutters PDC Bit Diamond Inserts for Hard Rock
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