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Selection of Speed Reducer

Revolutions of input shaft and output shaft:

With belt-pulley or coupled shaft transmission, the highest input speed should not exceed 2000RPM; the general range is 600-1800RPM.  If the revolving speed is too high, the bearing will have less life due to over-friction; too low, the lubrication or efficiency will be reduced.  Please specify either high or low speed.

Output shaft revolution = Input shaft revolution x reduction ratio

In case of any revolution of specially low speed, both the efficiency and torque will be lessened; further, it may be harder to provide oil on the bearing.  Be careful to select the model number and lubricant oil.

Reduction ratio = Output shaft revolution / Input shaft revolution



2Revolving Direction and Shaft Direction


The revolving direction of output shaft relies on worm thread's direction; right-directed thread is for common use except for special conditions.  When input shaft is in clockwise, output shaft is in counterclockwise; pay attention to two-stage worm reducer, the revolving direction of input and output shaft is the same.  As a worm  reducer has various shaft directions, be sure to see the user's manual titled "choice of shaft directions".  For any not specified, refer the right shaft as the standard.





Due to the internal fabrication wear, partial energy will be transformed to be heat energy and fade away.  As the appendix shown in this catalog.

Efficiency = Output shaft HP / Input shaft HP x 100%

The efficiency of the worm reducer depends on worm's advancing angle, periodical speed, lubricant oil, bearing friction and materials friction factor.  For the approximated value of efficiency, please see the right table.

Ratio Efficient