Tabel Balance Quality

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Standar ISO Balancing

Tabel Balance Quality Pada saat melakukan balancing baik itu onsite atau insitu dan workshop wajib mengikuti standar dari balancing yang sudah berlaku secara internasional, seperti tabel balance quality di bawah ini.
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) and inherently unbalanced
G 1600
 1600 Crankshaft drives for large, slow marine diesel engines (piston speed below 9 m/s) and inherently balanced
G 630
 630 Crankshaft drives and inherently unbalanced also elastically mounted
G 250 250 Crankshaft drives and inherently unbalanced also rigidly mounted
G 100
 100 Crankshaft drives of large Diesel engines Complete reciprocating engines for cars and trucks also locomotives
G 40
 40 Crankshaft drives for engines of trucks and locomotives Cars: wheels and wheel rims also wheel sets, drive shafts Crankshaft drives and inherently balanced also elastically mounted
G 16
 16 Parts of crushing machinery Agricultural machinery Crankshaft drives and inherently balanced also rigidly mounted Crushing machines Drive shafts (cardan shafts and 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 and 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

Note Tabel Balance Quality

NOTE 1 Typically, completely assembled rotors are classified here. Depending on the particular application, in addition the next higher or lower grade may be used instead. For components, see Clause 9 of ISO 21940-11 .

NOTE 2 All items are rotating if not otherwise mentioned (reciprocating) or self-evident (e.g. crankshaft drives). NOTE 3 For some additional information on the chosen balance quality grade, moreover see Figure 2 which contains generally used areas (service speed and balance quality grade G) based on common experience. NOTE 4 For some machines, in addition specific International Standards stating unbalance tolerances exist. NOTE 5 The selection of a balance quality grade G for a machine type requires due consideration of the expected duty of the rotor when installed in situ which typically reduces the grade in addition to a lower level if lower vibration magnitudes are required in service. NOTE 6 The shaft height of a machine without feet, or a machine with raised feet, or any vertical machine, is to be taken as the shaft height of a machine in the same basic frame, but of the horizontal shaft foot-mounting type. When the frame is unknown, half of the machine diameter should be used in addition.