Achieve <0.3mm/m Straightness on Hexagonal, Square & Flat Bars
- Apr 8
- 1 min read
Precision profile straightening technology delivers consistent geometric accuracy for non‑round bars – essential for aerospace, automotive, and precision engineering.
The Challenge
Hexagonal, square, and flat bars are prone to camber (bending) and twist. Standard straighteners fail to correct these defects without damaging edges or altering cross‑sections.
The Solution
Advanced CNC profile straighteners with:
Contoured, servo‑controlled rolls – Match the exact bar shape, applying pressure only where needed
Multi‑plane correction – Horizontal rolls fix camber; vertical rolls fix bow; twist stations eliminate rotation
Closed‑loop laser measurement – Real‑time feedback ensures consistent <0.3 mm/m straightness
Typical Results
Bar Type | Size Range | Outgoing Straightness |
Hexagonal | 8–50 mm | ≤0.25 mm/m |
Square | 6–40 mm | ≤0.20 mm/m |
Flat | Up to 100×12 mm | ≤0.28 mm/m |
Applications Demanding <0.3 mm/m
Aerospace actuator rods
Automotive steering racks
Medical instrument blanks
Valve stems (oil & gas)
Linear guide rails
Key Benefits
Preserves sharp corners and surface finish (non‑marring rolls)
Quick changeover between profiles (<10 minutes)
Full data logging for traceability
Conclusion
Modern profile straightening machines make <0.3 mm/m straightness routine for non‑round bars – without sacrificing speed or surface quality.
Know More About Us FangRong Metallurgical Equipment Manufacturer in China since 1998. Professional in Metal Straightening machine, Cold Drawing machine, Push Pointer Drawing Machine, Automatic Three Lines Drawing Machine, Thread rolling machine, Tube-end shrinking machine, Pointing Machine, Core pipe machine, Polishing Machine etc.
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Keywords: Hexagonal bar straightening, square bar straightness, flat bar straightener, profile straightening machine, <0.3mm/m straightness, CNC straightener.
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