|Balance Grade G||EW 1] 2] MM/s||Rotor Types – General Examples|
|G 40||40||– Car wheels, wheel rims, wheel sets, drive shafts.
– Crankshaft-drives of elastically mounted fast four-cycle engines (gasoline or diesel) with six or more cylinders4).
– Crankshaft-drives for engines of cars, trucks and locomotives.
|G 16||16||– Drive Shafts (propeller shafts, cardanshafts with special req
– Parts of crushing machinery.
– Parts of agricultural machinery.
– Individual components of engines (gasoline or diesel) for cars, trucks and locomotives.
– Crankshaft-drives of engines with six or more cylinders under special requirements.
|G 6.3||6.3||– Parts or process plant machines.
– Marine main turbine gears (merchant service).
– Centrifugal drums.
– Assembled aircraft gas turbine rotors.
– Fly wheels.
– Pump impellers.
– Machine-tool and general machinery parts.
– Normal electrical armatures.
– Individual components of engines under special requirements.
|G 2.5||2.5||– Gas and steam turbines, including marine turbines (merchant service).
– Rigid turbo-generator rotors.
– Machine-tool drives.
– Medium and large electrical armatures with special requirements.
– Small electrical armatures.
– Turbine-driven pumps.
|G 1.0||1.0||– Tape recorder and phonographs (gramophone) drives.
– Grinding-machine drives.
– Small electrical armatures with special requirements
|G 0.4||0.4||Spinles, disks and armatures of precision grinders.
|1] w=2xn / 60-N / 0, if n is measured in revolutions per minute and w in radians per second. To simplify: Tolerance = Component Weight [kg] x Quality Grade x 9549 / Operational Speed [RPM]
2] In general, for rigid rotors with two correction planes, one-half of the recommended residual unbalance is to be taken for each plane.