Compressive strength: ≥2500 MPa
Gear ring hardness: HRC 58-62
Dynamic balance accuracy: G2.5 level
Sealing level: IP68
Quick change support: Yes
Core material: high-strength alloy forged steel + carbide gear
The roller cutter is the core rock breaking unit of the raise boring reamer drill bit, directly undertaking the key tasks of shearing and fracturing the rock formation. Looking roller cutters set industry benchmarks in terms of rock breaking efficiency, wear resistance and extreme geological adaptability.
Optimized tooth shape design: The mixed layout of wedge-shaped/ball teeth increases the penetration depth of rock formations and improves the crushing efficiency by 40%;
Low-friction bearing system: Ceramic roller bearings reduce rotational resistance and ensure continuous and efficient output under high thrust.
Multi-layer composite strengthening: carburizing of matrix + tungsten carbide surfacing on tooth surface, wear resistance is 3 times that of ordinary hobs;
Dual channel sealing: high-pressure grease seal + labyrinth dustproof structure to prevent abrasive rock powder from invading the bearing.
Anti-crack structure: elastic tooth seat buffers impact loads and reduces the risk of alloy tooth fracture under hard rock conditions;
Self-cleaning tooth gap: chip groove design between teeth avoids rock debris accumulation and maintains continuous rock breaking capability.
Check the flatness of the cutter seat installation (≤0.05mm/m), and rotate and adjust the position of the hob every 50 hours.
Hard rock (granite: small diameter (12-14″) + high-density ball teeth, ball teeth (wear-resistant type).
Soft rock (shale): large diameter (16-18″) + wide-spaced wedge teeth, wedge teeth (shear priority).
Broken zone: reinforced bearing seat + elastic buffer structure mixed tooth type.
High-abrasive formation: full tooth surface tungsten carbide coating (thickness ≥ 3mm), ball teeth + reinforced alloy matrix.
