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| | | PRECISION ROLLER PINION SELECTION PROCESS | | |
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| | | Proper RPS model size selection requires the application data listed below. These specifications are needed to determine: load mass, load acceleration, force due to acceleration, force due to gravity, force due to friction, and total force of the load. Sample calculations using both metric and imperial units are shown along with worksheet space to calculate your own application. | | |
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| | | This Curve will select the smallest RPS size Velocity / ---k fa fi f2 etc. | | |
| | | Friction Coefficient (u) Rolling Guide 0.005 ~ 0.02 | | |
| | | Vi | | |
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| | | Sliding Guide 0.1 ~ 0.2 | | |
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| | | Shock Factor* (K) | | |
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| | | | | | | | | | Shock-less 1 1Q ~ 12 Smooth Operation | | | | Normal Operation | 1.2 ~ 1.5 | | | | Operation with Impact | 1.5 ~ 2.5 | | | | | | | | | |
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| | | 0 Degrees from Horizontal | | |
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| | | fg | | |
| | | Time | | |
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| | | | | | | | | | | | | Required Specification for Proper RPS Selection | Customer Application Specifications | Metric Units (Examples on the next page) | Imperial Units (Examples on the next page) | | | | Weight to be Driven** (W) | kg [lb] | | 226.8 kg | 500 lb | | | | Maximum Velocity (V) | m/s [ft/s] | | 0.91 m/s | 3 ft/s | | | | Acceleration Time (t) | seconds | Sample Data | 0.5 s | 0.5 s | | | | Shock Factor (K) See table above | mm [in] | 1.2 | 1.2 | | | | Other Forces *** (F1), (F2) etc. | N [lb] | 0 N | 0 lbf | | | | Gravitational Acceleration **** (g) | 9.81 m/s2 [32.2 ft/s2] | 9.81 m/s2 | 32.2 ft/s2 | | | | Frictional Coefficient (u.) See table above | | | 0.01 | 0.01 | | | | Degrees from Horizontal (8°) | | | 60° | 60° | | | | | | | | | | | | |
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| | | Shock Factor indicates the smoothness of operation *** Gravitational Acceleration is a constant value. Use 9.81 m/s2 for metric applications and 32.2ft/s2 for imperial appliations | | |
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| | | General Application Information | | |
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| | | | | | | | | | Application Type | | | | Shaft Diameter | | | | | Environmental Conditions | | | | | Distance of Travel | | | | | Required Life | | | | | Required Positional Accuracy | | | | | Other Application Data | | | | | | | | | | | | | | | | | | |
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