*Recommendation is based on information supplied by the customer. Final acceptance and approval is the responsibility of the customer. Tolomatic recommends field testing or simulation of field testing on the machine it is designed for.
Torque, RPM, Gear Ratio and Bore Size Required input torque units
To determine the gearbox for your required torque:
Reference the Torque and Efficiency charts from the product catalog or on www.tolomatic.com for the performance data for each model. Locate your input torque on the graph and intersect it with the RPM of the input shaft. In general, gearbox capacity increases as listed below:
Float-A-Shaft: Compact: Low Torque Journal Bearings
Float-A-Shaft: Compact: High Torque Roller Bearings
Slide-Rite CR: Compact
Float-A-Shaft: Standard: Low Torque Journal Bearings
Slide-Rite CR: Standard
Float-A-Shaft: Standard: High Torque Roller Bearings
For ratios other than 1:1: Refer to the performance graph for that gearbox. When torque vs RPM intersects below the 300°F (149° C) curve, you have selected a gearbox suitable for your application.
If your torque vs RPM intersection point is above the 300°F (149° C) curve, then you do not have a proper application for that gearbox. Your options are to reduce either your input torque or RPM to get under the 300°F (149° C) curve or try a gearbox with greater capacity.
Bore size for shaft requirements units Output Torque units
Output torque = Input torque X efficiency X ratio
Section Slide-Rite® Selection Example
Slide-Rite® gearbox Standard Series at 700 RPM and 90 in-lbs (10.17 Nm)
Output torque = (input torque) (efficiency) (ratio)
Output torque = (90 in.-lbs. or 10.17 Nm) (.88) (1:1)
Output torque = 79 in.-lbs. or 8.93 Nm
High Torque Ball Bearings
Torque/Efficiency vs RPM at Maximum Bearing Temperature
Float-A-Shaft® Selection Example
3:2 ratio journal bearing Float-A-Shaft at 50 RPM and 500 in-lbs (56.49 Nm) (See graph below)
Output torque = (Input torque) (efficiency) (ratio)
Output torque = (500 in.-lbs. or 56.49 Nm) (.62) (3:2)
Output torque = 465 in.-lbs. or 52,54 Nm
Low Torque Journal Bearings
Torque/Efficiency vs RPM at Maximum Bearing Temperature Contact Information Name (Required)
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