balancing model for crankshafts By putting on, taking off or changing the position of different counterweights, a static or dynamic unbalance of crankshafts can be shown. proper selection and positioning of the weights cause a true running. description ordernumber 1010 see also: two-stage twin-choke downdraught carburetor 4A1 spiral-type supercharger VE pump, electronically controlled with solenoid valve distributor-type fuel-injection pump with electronic governor