Rotor

PSS rotors.

The PSS stainless steel rotor is slid down the shaft and is secured to the shaft with set screws at 90° for maximum holding power. Precision tolerances are maintained by computer controlled lathes. The faces have a number 9 micro finish and are perpendicular to the bore to prevent run-out as the collar rotates. The carbon graphite stator will polish the face of the rotor during the first few minutes of operation. The stainless steel rotor should not need to be replaced under normal operating conditions.

The PSS stainless steel rotors are available in two different materials depending on application, 316L stainless steel or Nitronic 50.

316L Rotor

PSS 316L stainless steel rotor

Chemical Composition (wt%)


C Si Mn P S Ni Cr Mo Cu N
0.028 0.40 1.50 0.036 0.023 10.2 17.2 2.07 0.34 0.06

Mechanical Properties Spec.

Hardness: 134HBW
Tensile Strength: 84.5 ksi
Yield Strength (0.2%): 38.5 ksi
Elongation: 65%
Reduction of Area: 80%
Grain Size #: 6.0
PSS 316L stainless steel rotor

Nitronic 50 Rotor

PSS nitronic 50 stainless steel rotor

Chemical Composition (wt%)


C Mn P S Si Ni Cr V Mo Co N Cb
0.038 4.85 0.029 0.004 0.36 11.89 21.79 0.15 2.28 0.14 0.320 0.154

Mechanical Properties Spec.

Hardness: BHN 215
Tensile Strength: 116,820 psi
Yield Strength (0.2%): 69,070 psi
Elongation: 43.9%
Reduction of Area: 68.6%
Grain Size #: 5.0

Meets requirements of ASTM A262 Practive E.

PSS nitronic 50 stainless steel rotor