It all started in the autumn of 2023. One of the largest European manufacturers of cylindrical components for the power industry and heavy engineering approached RETOS with a clear brief: "We need to harden shafts and rolls 5–6 metres long, 250–350 mm in diameter, with a hardened layer up to 3 metres along the length. Nobody in Europe can do it reliably and in the required quality."
That was Rajmont's cue. The company had several large vertical hardening machines in its portfolio, but none this extreme. "We had a machine rated at 400 kW with a 4-metre hardening length, but 630 kW and 6 metres of clamping length was a new level even for us," admits Zdeněk Rajmont, founder and owner of the company.
The two companies clicked immediately. RETOS appreciated Rajmont's vast technological experience, while Rajmont valued the precision, robustness and production capacity of RETOS. The cooperation agreement was concluded within a few weeks.
Technical parameters
|
|
|
|---|---|
|
Max. power of the hardening transformer |
630 kW |
|
Input current (400 V) |
1,000 A |
|
Frequency |
1–10 kHz (automatically controlled) |
|
Max. hardening length |
3,000 mm |
|
Max. clamped workpiece length |
6,000 mm |
|
Max. workpiece diameter |
380 mm |
|
Max. workpiece weight |
1,250 kg |
|
Workpiece rotation accuracy |
±0.1 mm per metre of length |
|
Floor space required |
11 × 7 metres |
|
Machine height |
5.5 m |
|
Cooling |
closed circuit + external 500 kW cooling tower |
