Installation

Angular Alignment

Hold each shaft at maximum end float. Rotate both shafts together, and measure between matching points at the outside diameter of the coupling faces for the top, bottom and both sides. Use two indicators because of possible axial shaft movement. Read difference of variation between them.

Align shafts so that the total indicator variation does not exceed 0.002 inch. (See Figure 1.)

NOTE

If vibration levels increase cold to hot, alignment should be checked hot to verify that motor and driven equipment are properly aligned at operating temperature. Adjust if necessary.

3.If no change is indicated, retighten the bolt and repeat the process for each of the remaining three mounting bolts.

4.If a change is indicated, add shims under motor foot and retighten until indicator movement is reduced or eliminated.

NOTE

1.The foot plane is of concern for each unit of rotating equipment. Check driven equipment if necessary.

2.Base or foundation rigidity can also affect vibration; check for resonance in supporting structure.

3.Recheck alignment after any change in shims and document alignment readings for warranty information.

Figure 1. Diagrams Showing Parallel and

Angular Misalignment

Foot Plane

The proper foot plane exists when adequate shims have been installed to assure equal pressure on each foot or corner of motor when the mounting bolts are loose.

To determine proper foot plane:

1.Mount dial indicator on shaft to be checked so that contact will rest on either the adjacent shaft or a bracket from the foundation or base.

2.With mounting bolts tight and indicator set at zero, release one bolt at the shaft extension end of the unit and check indicator for a maximum change of 0.001 inch.

V-Belts

Check belt manufacturer’s recommendations for maximum speed of sheaves and belts, minimum pitch diameters, maximum allowable number of belts and maximum sheave width.

When motor is ordered for V-belt drive, check motor outline for motor manufacturer’s limits on belt pull, sheave distance from motor, and sheave diameter.

Use only matched-belt sets. V-grooves must be in line; sheaves must be parallel and axially aligned. Belts must enter and leave sheaves with no side bending. For long bearing life, the belt tension is important; consult belt manufacturer for proper tension to suit drive. Protect belts from grease and oil. NEVER use belt dressing.

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