Core Value
Breaking through the limitations of circular pipes and unleashing design potential.
In the transmission system of modern agricultural machinery, circular pipes are no longer the only choice. Haihui Steel produces precision drawn special-shaped pipes (hexagonal, octagonal, rectangular, D-type, etc.) specifically designed for applications that require high torque transmission and extremely high structural rigidity.
Core Advantages of the Product
High Geometric Precision
With mature cold drawing/cold rolling mold technology, our special-shaped pipes can control the edge distance and symmetry tolerance within ± 0.05mm – ± 0.10mm. This means that your hexagonal or square axis can achieve a “zero clearance” fit with the coupling.
Excellent High Torque Resistance
The irregular cross-section provides stronger torsional resistance than circular pipes of the same weight. Using alloy steels such as 40Cr, 42CrMo, and 45#, ensure that the shaft tube does not twist or break during high load operations such as deep plowing and harvesting.
Stress Relieved
All shaped tubes undergo precision annealing treatment to eliminate residual stresses during the cold drawing process. Ensure that the pipe body maintains extremely high straightness during secondary machining or welding.
Full Customization
We not only provide standard hexagonal and square pipes, but also customize non-standard shaped parts according to your drawings to help your agricultural machinery achieve lightweighting and structural optimization.
Application Fields
Tractor Transmission System
Hexagonal drive shaft, shift shaft, power output shaft (PTO).
Sowing Machine & Plant Protection Machine
Irregular structural beams, spray rod support shafts.
Harvesting Machinery
Harvester reel spindle, conveyor trough shaped bracket.
“Accurate shape is the key to stability.”
Haihui promises: We use the IATF 16949 system to ensure that every shaped pipe accurately fits your mechanical blueprint.
Post time: May-30-2026