< Mechanical Adjustable Speed Drive
The standard selection procedure for RXC drives is fairly simple. It assumes that the required output torque and speed range have already been determined. If the torque figure does not already include a Service Factor for difficult applications or long hours of use, start at step 1. Otherwise, skip to step 4.
- Find the application in the Load Classification Table. Determine whether the application is a Uniform load, Moderate load, or Heavy shock load.
- In the table below, find the correct column for the Load Classification, and the correct line for the Duration of Service. The intersection of these parameters contains the Service Factor.
- Multiply the initial required torque by the Service Factor, to determine the necessary rating torque.
- Find the speed range required for application in the Rating tables.
- On that rating table, locate a torque rating that fits the rating torque as determined above.
- From the model number column of that rating table, copy the partial model number displayed for that unit.
- Use the Model Number chart to complete the Model Number (replace the dashes in the partial Model Number), considering any options required for this application.
Service Factor Table
| Duration of Service | Load Classification | |||||
|---|---|---|---|---|---|---|
| Uniform load (U) | Moderate Shock load (M) | Heavy Shock load (H) | ||||
| AGMA | Circulute | AGMA | Circulute | AGM | Circulute | |
| Occasional: 1/2 hour per day | 0.50 | 0.50 | 0.80 | 0.80 | 1.25 | 1.20 |
| Intermittent: 3 hours per day | 0.80 | 0.80 | 1.00 | 1.00 | 1.50 | 1.35 |
| Continuous Up to 10 hours per day | 1.00 | 1.00 | 1.25 | 1.20 | 1.75 | 1.50 |
| Continuous 24 hours per day | 1.25 | 1.20 | 1.50 | 1.35 | 2.00 | 1.60 |
Note: AGMA service factors shown are the American Gear Manufacturers’ recommendations for conventional gear reducers.