Factory Rotating Assembly Balancing
Once the matching and balancing of a set of rotors is complete it becomes necessary to dynamically balance the entire rotating assembly. This procedure is accomplished by mounting custom components called "Bob Weights" to the rotor bearing journals of the eccentric shaft which from thereon stimulate the actual weight of the rotors themselves. REC has had a very specially designed custom Bob weight manufactured to allow us to accommodate all different weights of rotors within a tolerance of 1 gram. After the Bob weights are installed, the shaft is then dressed with the rest of the rotating components and counterweights. The rotating assembly is then spun to approximately 1200 RPM on the dynamic balancer. The balancer then electronically measures and points out the spots on the counterweights (or flywheel) where material needs to be removed.
Within ours sophisticated equipment the milling head can accurately be aligned to the spots with pinpoint placement. When it is determined that material needs to be removed, the correction can be performed while the rotating assembly is still fastened to the machine. In instances where weight needs to be added the counterweights and or flywheel are removed and remotely fitted with heavy tungsten metal slugs. We then perform a procedure to securely anchor these slugs of specified weight into the subcomponents. A final spool up and measurement is performed to check and finalize a perfect balance of the rotating assembly.
Rotating assembly balancing for lightened assemblies (corrections to remove material)
Prices for 10a, 12a and 13b assemblies
$170
Prices for 20b and 3 rotor assemblies
$235
Prices for 4 rotor assemblies
$295
Rotating assembly balancing for heavier assemblies (corrections where material is added)
Prices for 10a, 12a and 13b assemblies
(call) range $190-$260
Prices for 20b and 3 rotor assemblies
(call) range $255-$325
Prices for 4 rotor assemblies
(call) range $320-$390