Potenza necessaria per rimuovere un centimetro cubo di materiale al minuto sulla base di una efficienza energetica del 60% alla punta del mandrino.
Work Material K (Constant)
Aluminum . . . . . . . . . . . . . . . 0.3
Magnesium . . . . . . . . . . . . . . 0.3
Copper . . . . . . . . . . . . . . . . . 0.5
Brass . . . . . . . . . . . . . . . . . .0.4
Bronze . . . . . . . . . . . . . . . . . 0.5
Cast Irons
Ferritic . . . . . . . . . . . . . . 0.7
Pearlitic . . . . . . . . . . . . . 1.0
Chilled . . . . . . . . . . . . . . 1.7
Malleable Iron . . . . . . . . . 1.0
High Temp. Alloys
Ferritic . . . . . . . . . . . . . . 1.7
Austenitic . . . . . . . . . . . . 2.0
Nickel Base . . . . . . . . . . . 2.5
Cobalt Base . . . . . . . . . . . 2.5
Steel
up to 150 Brinell . . . . . . . . 1.4
up to 300 Brinell . . . . . . . . 1.7
up to 400 Brinell . . . . . . . . 2.0
up to 500 Brinell . . . . . . . . 2.5
High Tensile Alloys
180,000 - 220,000 psi . . . . . . 2.0
220,000 - 260,000 psi . . . . . . 2.5
260,000 - 300,000 psi . . . . . . 3.3
Titanium
under 100,000 psi . . . . . . . . 1.3
100,000 - 135,000 psi . . . . . . 1.7
135,000 psi & over . . . . . . . 2.5
Stainless Steel
Free Machining . . . . . . . . . 1.0
Others . . . . . . . . . . . . . . 1.7
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