Gearhead

The rate at which the gearhead decelerates the motor's rotation speed. Motor rotation speed at gearhead output shaft will be \(\frac{1}{ \text{Gear Ratio}}\).

The gearhead gear ratios correspond to the difference in motor rotation speed between 50 Hz and 60 Hz. To ensure the same rotation speed of the gearhead output shaft, Oriental Motor offers 2 series of the gear ratio; 3, 5, 7.5, 12.5, 15 etc. and 3.6, 6, 9, 15, 18. The latter is 1.2 times the gear ratio. A gear ratio of 3 in a 50 Hz region and a gear ratio of 3.6 in a 60 Hz region allow nearly identical gearhead output shaft speeds. Of course, all gearheads can be used in both the 50 Hz and 60 Hz regions.

This is the maximum load torque that can be applied to the gearhead. The mechanical strength of the gears and bearings used in the gearhead is determined by the material and size of the gears and bearings, and therefore depends on the type and gear ratio of the gearhead.

This coefficient is used to estimate the lifetime of the gearhead. It is a value empirically determined from life tests for the type of load and operating conditions.

This is the efficiency of connecting a gearhead to the motor to amplify the torque. It is displayed in % (percent). This is determined by the bearings used in the gearhead, the friction of the gears, and the resistance of the lubricant. Taking the case of a GN gearhead as an example, the transmission efficiency is 90 % per gearhead gear stage, and 81 % for a 2-stage gearhead, which has the fewest gear stages. As the gear ratio increases, the number of gear stages increases and decreases to 73 % and 66 %.

Load applied perpendicular to the gearhead output shaft. The maximum radial load that can be applied to the gearhead is called the permissible radial load, and it varies depending on the type of gearhead and the distance from the shaft end. This includes the tension in the belt drive.