Balancing Quality Grade G number |
Vibration velocity in mm/s | Rotor types General examples |
---|---|---|
G 4000 | 4000 | Crankshaft drives for large, slow marine diesel engines (piston speed below 9 m/s), inherently unbalanced |
G 1600 | 1600 | Crankshaft drives for large, slow marine diesel engines (piston speed below 9 m/s), inherently balanced |
G 630 | 630 | Crankshaft drives, inherently unbalanced, elastically mounted |
G 250 | 250 | Crankshaft drives, inherently unbalanced, rigidly mounted |
G 100 | 100 | Crankshaft drives of large Diesel engines Complete reciprocating engines for cars, trucks and locomotives |
G 40 | 40 | Crankshaft drives for engines of trucks and locomotives Cars: wheels, wheel rims, wheel sets, drive shafts Crankshaft drives, inherently balanced, elastically mounted |
G 16 | 16 | Parts of crushing machinery Agricultural machinery Crankshaft drives, inherently balanced, rigidly mounted Crushing machines Drive shafts (cardan shafts, propeller shafts) |
G 6.3 | 6.3 | Fly-wheels Fans Aircraft gas turbine rotors Electrical armatures Process plant machinery Pump impellers Aircraft gas turbines Centrifuges (separators, decanters) Electric motors and generators (of at least 80 mm shaft height), of maximum rated speeds up to 950 r/min Electric motors of shaft heights smaller than 80 mm Fans Gears Machinery, general Machine tools Paper machines Process plant machines Pumps Turbo chargers Water turbines |
G 2.5 | 2.5 | Machine-tool drives Computer drives Turbo compressors Small electric armatures Electric motors and generators (of at least 80 mm shaft height), of maximum rated speeds above 950 r/min Gas turbines and steam turbines Machine-tool drives Textile machines Turbine-driven pumps |
G 1 | 1 | Grinding machine drives Audio and Video drives Textile bobbins Automotive turbochargers |
G 0.4 | 0.4 | Gyroscopes Disk-drives Spindles and drives of high-precision applications |