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Kaplan blades

Kaplan blades

Manganese-nickel steel or chromium-nickel steel


Kaplan turbines are water turbines against which water flows in an axial direction and which have an efficiency of 80–95%. They were developed by Viktor Kaplan, based on the Francis turbine, and are particularly suitable for large hydraulic power stations located on calm bodies of water.

Their adjustable rotor is similar to a ship's propeller. Walter offers highly efficient machining tools and complementary machining processes for manufacturing these components

Roughing outer diameters on the blade flange

Our solution:
Walter Xtra·tec® F4238 porcupine milling cutter

  • Large range of cutting depths can be covered
  • Extremely soft-cutting geometry
  • High material removal rates

Benefits for you:
High productivity thanks to excellent cutting parameters, high process reliability due to extremely soft-cutting geometry and use of the new Tiger·tec® Silver WSP45S grade.

Finishing mating faces on the flange

Our solution:
Walter F2010 adjustable face milling cutter

  • Adjustable runout
  • Exchangeable cartridges, only one basic body
  • Tiger·tec® Silver cutting tool materials for a long tool life and high process reliability

Benefits for you:
Always up-to-date with the latest developments in machining technology thanks to the cartridge construction. The insert seat cartridges can be easily exchanged.

Pre-drilling connecting holes on the blade flange

Our solution:
Walter Xtra·tec® B4213 insert drill

  • Force-fit insert clamping
  • Ideal insert position ensures forces are balanced during the machining process
  • Optimised chip space and robust tool body
  • Hard-nickel-plated surface provides protection against wear and corrosion
  • Wiper edge inserts at periphery

Benefits for you:
Increased productivity as a result of higher workpiece values; low hole tolerance; reduced costs due to four cutting edges; higher cutting parameters; and fewer subsequent operations. Excellent surface quality and high level of process reliability.

Roughing turbine blades

Our solution:
F2334R round insert milling cutter

  • Optimised insert seat design
  • Reinforced tool adaptor
  • Direct coolant supply to the cutting edge
  • Four cutting edges per indexable insert
  • Insert sizes: RO.X 10T3.. or RO.X.1204..

Benefits for you:
Long tool life thanks to new indexable insert grades.