RPX couplings selection
RPX coupling selection to couple an 11.0kW, 1450 rev/min motor to a hammer mill which absorbs 9.6kW running for 12 hours per day with no more than 30 stops / starts per hour. A good shock absorbing spider is required for this heavy-duty application.
The ambient temperature is + 38∘C. The motor shaft is 42mm diameter and the kiln shaft 38mm.
Service factor
From table 1 on page 251, the service factor for this application is 1.75 x 1.2 x 1.0 = 2.1
Design power
The design power is 9.6 x 2.1 = 20.2 kW
The above selection procedure is based on the following parameters: –
service factor 2.0
30∘C Maximum temperature
Shore 92 insert
- Pilot bore flanges are in Bold
- Taper bore flanges art in italics
100 starts per hour maximum
If the parameters are different from the above, selection should be based on power and speed.
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