Gardner Denver RBS 15, Parts List Operating And Service Manual

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RB-7-100 Page 13
Exceeding overhung load limitations leads to unwarrantable premature bearing failure and shaft
breakage.
The location of the sheave on the blower shaft greatly affects the stress in the shaft. The optimum blower sheave
positioning is as close as possible to the blower drive cover.
The calculated shaft load must not exceed the maximum allowable load listed in Maximum Belt Load Chart,
FIGURE 2-2. If the calculated shaft load exceed the maximum allowable load:

Increase Sheave Diameters to Reduce Belt Pull

Use Jackshaft Drive

Use Direct Coupled or Gearbox Drive
To calculate shaft load for a given V-Belt Drive Arrangement:

Insert the belt pull into the formula for Calculation of Shaft load, FIGURE 2-2, to arrive at the calculated
shaft load.
PIPING
Inlet and discharge connections on all blowers are large enough to handle maximum volume with minimum
friction loss. Reducing the pipe diameter on either inlet or discharge will only create additional line loss and
increase the overall pressure differential. Excessive weight of piping and fittings will cause internal misalignment
and premature wear. Never allow the blower to carry the weight of the pipe. If possible, a spool or sleeve-type
expansion joint should be installed between the unit and the piping. Where a flexible connection is not practical,
the weight of the rigid connection must be separately supported.
All system piping must be cleaned internally before connecting to the blower.
RBS blowers are shipped dry from the factory. Do not attempt to operate the blower before
following proper lubrication instructions. Permanent damage to the gears, bearings and seals will
occur.