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Sub-micron repeatability does not come from the press alone. It comes from measuring the shaft at enough points along its length to catch deflection before correction, then applying force only where the material can respond.
Three to five laser or contact probes scan each shaft before and after every correction. The CNC compares actual deflection with target straightness and builds a correction map for that specific blank. You avoid single-point surprises where the far end springs back after the center reads straight.
Maximum straightness is set by the blank itself. A precision-ground shaft with tight roundness and uniform hardness can be corrected closer to its theoretical line. A rough-forged part with runout and residual stress will plateau earlier. The machine does not force every part to the same number — it measures the blank first, then corrects to the achievable limit, not beyond it. More precise workpiece, straighter result.
Correction force is applied as point pressure through tooling matched to the shaft diameter and section. No full-contact dies, no pinch points, no surface scoring. After straightening, the part surface remains as it came off the grinder or lathe.
Closed-loop correction plus automatic loading and unloading means one operator can run several machines during a shift. The self-learning system stores correction recipes by part number, so setup for a repeat job is a touchscreen selection, not a manual re-teach.
The table below reflects the machine as delivered for shaft straightening. Workpiece-dependent values are marked because the blank's own precision sets the floor.
| Parameter | Specification |
|---|---|
| Straightening accuracy | Up to 0.01 mm (workpiece-dependent) |
| Repeatability | Sub-micron on precision-ground cylindrical blanks; multi-point measurement |
| Measurement points | 3–5 along shaft, configurable by part program |
| Straightening force | 60 ton, 100 ton, 120 ton (model-dependent) |
| Cycle time | Under 90 seconds typical shaft correction cycle |
| Control | CNC servo-hydraulic, closed-loop, self-learning AI |
| Material handling | Automatic loading/unloading, MES connectivity |
| Surface quality | Point-pressure straightening; no scratches or indentations |
| Crack detection | Optional QASS Germany integration |
| Certification | ISO 9001, CE |
Maximum shaft length and diameter are engineered to your drawing. Send a part for sample testing to confirm achievable straightness on your specific blank.
New energy vehicle drivetrains put the tightest demands on shaft straightness. A hollow motor shaft running at 16,000 rpm will vibrate if runout is not controlled. Multi-point measurement here catches deflection across the full length, not just at the drive end. We have seen e-axle half shafts come off this machine with surface quality good enough for immediate assembly without polishing.
Every blank has a straightness ceiling. Send us your shaft drawing or a sample batch. We will map deflection at all measured points, correct within the workpiece's own capacity, and return a measurement report with before/after values. If sub-micron repeatability is possible on your part, the data will show it.
The cnc shaft straightening machine corrects long, slender shafts using multi-point deflection measurement and servo-hydraulic point pressure. The result depends on the blank: precision-ground shafts reach sub-micron straightness; rough forgings plateau at their own geometric limit. Request a sample test to see where your part lands.
Straightening accuracy (workpiece-dependent)
Repeatability on precision-ground cylindrical blanks
Measurement points along each shaft
Straightening force options
Typical correction cycle
Unmanned operation capability
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