Most of the shafts in this video have just come out of heat treatment, and they arrive bent — quench distortion is normal, not a quality failure. The machine treats it as routine: probes map the distorted part while it turns, the ram corrects the largest deflections with controlled strokes, and re-measurement after each stroke compensates for the springback that hardened steel always shows. Within a few iterations the shaft meets target and is unloaded; stubborn parts are flagged instead of being forced.
A fixed stroke setting fails on heat-treated batches because springback shifts with steel grade and furnace results; the controller presses to a measured outcome instead, converging in a few hits. Hardened shafts then hold 0.02–0.05 mm TIR for automotive use and ≤0.02 mm for precision parts, matching soft-part quality. Cycles run 20–90 seconds, 5–10 times faster than manual correction. Standard builds are on the automatic straightening machines page.
Heat-treatment shops use this step on transmission shafts, gear blanks, piston rods, and axles between tempering and finish grinding. Options include automatic loading, runout data export for quality systems, and remote diagnostics; frames for large rotors extend to the 1000-ton class. Plants supply 380–480 V three-phase, and delivery takes 60–120 days. More on the method: how the automatic straightening process works.
Quench distortion belongs in the process review, not the scrap bin. Note steel grade, hardness route, and incoming runout on the print, and our specialists will place straightening between furnace and grinder — email the factory.
Purpose-built for post-quench and post-temper distortion
Springback-compensated strokes to 0.02–0.05 mm / ≤0.02 mm
20–90 second cycles, 5–10× manual straightening pace
Automatic loading and runout data export options
Frames up to the 1000-ton class; 380–480 V three-phase
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