Rotor shaft
The rotor shaft is the central shaft in the rotor of an electric motor and transmits its torque. Ernst Grob also produces rotor shafts as hollow shafts by external forming, which saves material and weight.
What is a rotor shaft?
The rotor shaft is the supporting shaft of the rotor in an electric motor and transmits the torque. Ernst Grob also produces it as a hollow shaft, which reduces material and weight.
- Hollow design: saves material and weight.
- Thin-walled hollow shafts in high quality: Competitors have more difficulty with thin-walled hollow shafts and their quality. This is made possible by incremental forming, in which only a small area is formed at a time. (link to the explanation on the process page)
Manufacturing at Ernst Grob
Ernst Grob produces the splines of rotor shafts by external forming. Which machine is used depends on the position of the spline. C9T or A9T if the spline is to be formed close to a shoulder or a parallel-flank profile is required. C9 or A9 if there is no shoulder or the spline is far enough away from the shoulder. The hollow design is made possible by the forming process.
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FAQ
Why is the rotor shaft designed as a hollow shaft?
The hollow design reduces material usage and the weight of the shaft, which directly improves the efficiency of the electric motor.
What can Ernst Grob do better with thin-walled rotor shafts?
Incremental forming only deforms a small area at a time. This makes thin-walled hollow shafts possible at a quality level that competitors struggle to reach.
Which machines are used for rotor shafts?
C9T and A9T are used for the rear spline, C9 and A9 for the front spline. Which machine is used depends on the position of the spline.
