WALTER PROTOTYP Technical information threading Application information Cooling and lubrication Material group Material Tapping Thread forming Th

WALTER PROTOTYP Technical information threading Application information Cooling and lubrication Material group Material Tapping Thread forming Thread milling Suitable coolant Suitable coolant Suitable coolant P Steel Emulsion 5 % Emulsion 5-10 % Emulsion/MQL/air blast Steel 850-1,200 N/mm2 Emulsion 5-10 % Emulsion 10 % Emulsion/MQL/air blast Oil (Protofluid) Emulsion/MQL/air blast Steel 1,200-1,400 N/mm2 Emulsion 10 % Oil (Protofluid or Hardcut 525) Emulsion/MQL/air blast Oil (Protofluid) Emulsion 10 % Emulsion/MQL/air blast Steel 1,400-1,600 N/mm2 equivalent to 44-49 HRC Oil (Protofluid or Hardcut 525) Forming generally not possible Emulsion/MQL/air blast M Stainless steel Emulsion 5-10 % Oil (Protofluid) Emulsion (main recommendation) Oil (Protofluid) Emulsion 5-10 %. Only possible with relatively low leads up to 1.5 mm Emulsion (secondary recommendation) K Grey cast iron GG Emulsion 5 % Forming not possible Emulsion/MQL/air blast Ductile cast iron GGG Emulsion 5 % Emulsion 10 % Emulsion/MQL/air blast N Aluminum up to max. 12 % Si Emulsion 5-10 % Emulsion 5-15 % Emulsion/MQL/air blast Aluminum over 12 % Si Emulsion 5-10 % Emulsion 5-10 %. Forming practical only in exceptional cases Emulsion/MQL/air blast Magnesium Oil (Protofluid) Forming not possible at room temperature Dry Copper Emulsion 5-10 % Emulsion 5-10 % Emulsion/MQL/air blast S Titanium alloys Oil (Protofluid or Hardcut 525) Oil (Hardcut 525) Emulsion Emulsion 10 % Emulsion Nickel alloys Oil (Protofluid or Hardcut 525) Oil (Protofluid or Hardcut 525) Emulsion Emulsion 10 % Emulsion H Steel >49 HRC Oil (Hardcut 525) possible only with carbide tools Forming not possible Dry/MQL O Plastics Emulsion 5 % Forming does not produce dimensionally accurate threads Emulsion/MQL Minimum quantity lubrication (MQL) Dry machining Most steel, aluminum and copper materials are machinable with MQL (cutting and forming). Use internal MQL for thread depths >1.5 x d. Flow rate 5 to 20 ml/h. MQL is not recommended for steel > 1,200 N/mm2, stainless steels or titanium and nickel alloys. MQL not recommended for aluminum wrought alloys below 4 % Si. Thread forming not recommended. Thread cutting through hole machining in steel of low or medium tensile strength and in cast iron. Thread milling D 448