Cfa coupling ch160 for 600mm cfa auger match mait hr120 cfa rig

Cfa coupling ch175 for 600mm cfa auger match mait hr130 cfa rig Cfa coupling ch175 for 750mm cfa auger match mait hr180 cfa rig Mait hr180 cfa coupling ch175 used for 600mm cfa auger 750mm cfa auger with cfa coupling ch175 match mait hr180 cfa rig 600mm cfa auger with cfa coupling ch160 match mait hr130 cfa rig  CFA couplings, models CH160 and CH175, are specifications of hexagonal quick connectors . They are core connecting components for drilling tools in the CFA (Continuous Flight Auger) construction method, used for torque transmission and fast assembly/disassembly between drill pipe sections, as well as between the drill pipe and the rig's rotary head. The number following "CH" stands for the nominal across-flats dimension of the hexagon (in mm). Specifically, CH160 has a hexagonal across-flats width of 160 mm, and CH175 has a width of 175 mm. Core Parameters & Compatibility of the Two Models 1. cfa coupling CH160 Coupling Specification positioning: Small-to-medium size CFA hexagonal coupling Compatible MAIT rigs: Mainly fits small-to-medium CFA rigs including HR 45 CFA, HR 75 CFA, HR 120 CFA Typical torque capacity: Approximately 120-200 kN·m Matching drilling tools: Generally paired with CFA continuous flight augers of 400-800 mm diameter, for small-to-medium diameter bored pile works 2. cfa coupling CH175 Coupling Specification positioning: Medium-to-large size CFA hexagonal coupling Compatible MAIT rigs: Mainly fits medium CFA rigs including HR 130 CFA, HR 175 CFA, HR 230 CFA Typical torque capacity: Approximately 200-280 kN·m Matching drilling tools: Generally paired with CFA continuous flight augers of 600-1000 mm diameter, for medium-to-large diameter bored pile works Materials:35crmo Tianjin huachang xingye technology co ltd Structural & Performance Features Quick-connect design: It adopts a hexagonal plug-in structure without bolt fastening, allowing rapid connection and removal of drill pipe sections to significantly boost construction efficiency. The hexagonal contact surface ensures stable torque transmission under heavy load without slipping. Hollow grouting passage: The coupling has a central through-hole connected to the hollow drill pipe body, which acts as the pumping channel for concrete or grout in the CFA process to ensure continuous and smooth grouting. High-strength construction: Typically forged from high-strength alloy structural steel and reinforced by full heat treatment, it features excellent torsional strength, impact resistance and fatigue durability, and can withstand alternating drilling loads in complex strata such as dense clay and sandy gravel.