Hi - tech make Hard bearing horizontal balancing machines are the ideal choice for balancing of different types of rotors like Pump rotors, Pulleys, Impellers, Grinding wheels, Turbine discs etc. Hi-Tech makes belt driven machine are the best suited for small rooters , impellers,armures, grinding spindles, small pulleys etc..heas machines eliminate the error due to the couplings, thetas errors are signified in small rooters and hence the machine are more suitable for small component . structure