Thermal shafts are fitted in steam turbines. They are often around 10 metres long and weigh over 100 tonnes. It often takes months to machine them, with up to 20 t of chips being produced. Machining this type of stainless-steel shaft is generally considered one of the most demanding machining tasks.
This particularly applies to milling the precision mounting grooves. As a result of a component-specific machining process developed individually for the user, Walter ensures that machining is both accurate to size and cost-efficient. This is implemented in production with our highly precise special tools for milling and drilling.
Walter back counterbore
Back counterboring the coupling holes
Our solution:
Walter back counterbore
- Customer-specific, custom-designed tool solution for back counterboring shaft couplings
- Available as back counterbore or circular interpolation technology
- Also available as a manual solution for unfavourable ratios, either with ScrewFit, shell or bayonet interface
Benefits for you:
Custom-designed solution. Flexible tooling system with process reliability.
Indexable inserts for semi-finishing and finishing face milling cutters
Machining fir-tree grooves
Our solution:
Indexable inserts for semi-finishing and finishing face milling cutters
- Cost-efficient semi-finishing and finishing of fir-tree grooves
- Finishing profiles up to a profile tolerance of ±10 μm
- No regrinding for solid carbide and shorter machining times
- Available for various profile shapes
Benefits for you:
Cost-efficient machining of fir-tree grooves with process reliability. Faster machining times and no additional regrinding costs compared to solid carbide tools.
Form slotting cutter
Rough milling of straight fir-tree grooves
Our solution:
Form slotting cutter
- Design: Modular cartridge system
- Equipped with Tiger·tec® Silver standard indexable inserts
- Roughing the grooves in the most effective and cost-efficient manner
- Maximum number of teeth and optimum chip clearances ensure maximum cutting performance and chip removal
Benefits for you:
Tiger·tec® Silver standard indexable inserts for maximum cutting performance and process reliability.
Solid carbide and HSS finishing face milling cutters
Finishing fir-tree grooves
Our solution:
Solid carbide and HSS finishing face milling cutters
- Particularly well-suited for smaller fir-tree profiles and tighter tolerances
- Rounds off Walter's product range to allow all customer and tool requirements to be processed in full
Benefits for you:
Increased accuracy on the component and complete machining from a single source.