SGS Cl series for the non-drive end of large motors

Generally these heavy duty sealed systems may be expected to run with no attention for as long as ten years (on 1800 rpm motors) before maintenance is needed. This maintenance can be made on the run. These kits can be installed in the field with hand held tools without dismounting or uncoupling the motor. These systems are sealed against water, grease or dust. They contain their wear products within the system and they have wear allowance for ten years at 1800 rpm as determined by long term testing.

The CL series system is designed to mount on the end of a shaft such as the opposite drive end (ODE) of single shafted horizontal motors that have solid shafts such as those used on fans or pumps that do not have ODE accessories such as encoders. This requires a suitable flat surface on the ODE of the motor and no existing hole in the ODE motor shaft to permit the use of the standard 3/8 inch UNC rotor attachment bolt. If a hole exists, the diameter and thread of the hole must be specified so that the correct custom machined mounting arrangement can be supplied. Custom adaptation may affect price.

These kits fit motors with a hole in the ODE endbell surface less than 3.25 inches diameter and, the distance from the ODE end of the motor shaft to the outside surface of the motor between 0.0 in. and less than 2 inches on motors less than 250 hp, less than 4 inches on motors between 300 and 500 hp and 6 inches on motors greater than 500 hp. The unit requires 4 inches of clearance at the ODE end of the motor. We suggest that approximately 7 inches of clearance from the ODE end of the motor be allowed for easy access for infrequent maintenance.

Installation requires access to remove the ODE endbell or fan cover and to drill and tap the ODE of the motor shaft, fan cover or endbell. This can be done in the field with hand held tools. The alignment tool is designed to reduce installation time and ensure proper alignment of the SGS^TM rotor and body.

The SGS^TM patented CL shaft grounding system is designed to control shaft-to-frame capacitive discharge through bearings by providing a single low impedance pathway from the shaft to the frame. If eddy currents are present, which is unlikely except in AC motors with 100 or more horsepower at 1200rpm or less OR on motors 200hp or greater regardless of rpm and no motor bearing is insulated, then two shaft grounding systems should be installed to pass the eddy current around both motor bearings while also controlling the capacitive discharge. If the ODE motor bearing is insulated to control eddy current, then one shaft grounding system can be used at the DE (i.e., SR series split ring) non-insulated bearing to control the shaft-to-frame capacitive discharge. If two insulated bearings are used, then a DE shaft grounding system should be used to control for potential eddy currents. A single insulated bearing will not control capacitive discharge through the non-insulated bearings. Please call to discuss applications where both eddy currents and capacitive discharge are believed to be present.