| 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. – Fans – 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. – Rotors. – Turbo-compressors. – 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.
– Gyroscopes. |
| 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. |
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