The shafts in this clip are hardened steel, and the video exists to show that hardening and straightening are compatible on one machine. After loading, probes map the distortion left by quenching or induction hardening; the ram corrects the worst bends with controlled strokes and immediately re-measures to catch springback. The loop continues until the hardened part reads as straight as a soft one would, then it is unloaded to the out-feed queue while the loader presents the next shaft.
Manual presses struggle here because springback varies heat by heat, but the machine answers with measurement: each stroke is followed by a scan and the next stroke is corrected from that data. The result is 0.02–0.05 mm TIR on automotive-grade hardened shafts and ≤0.02 mm on precision parts, in cycles of 20–90 seconds — 5–10 times faster than hand work. Process detail is in our article on the working principle of an automatic straightening press.
Heat-treatment contractors and captive shops use these machines on gear shafts, drive shafts, piston rods, and camshaft-type parts between hardening and grinding. Build options cover gantry or robotic loading, runout data logging, English HMI with remote support, and frames up to the 1000-ton class for large rotors; plants supply 380–480 V three-phase and delivery takes 60–120 days. Sizing is covered in our shaft straightening machine buyer’s guide.
Hardened-line decisions hinge on three inputs: steel grade, hardness profile, and the TIR the drawing allows. Pass those with a print, and our process desk evaluates springback strategy and setup — contact us.
Hardened and carburized shafts corrected post-quench
0.02–0.05 mm automotive / ≤0.02 mm precision TIR
Springback handled stroke by stroke via re-measurement
20–90 second cycles, 5–10× manual output
1000-ton-class frames; 380–480 V three-phase; 60–120 days
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