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Slewing Drive Backlash
- Nov 06, 2018 -

The slewing drive is a gearbox that can safely hold radial and axial loads, as well as transmit a torque for rotating. The rotation can be in a single axis, or in multiple axes together. Slewing drives are made by manufacturing gearing, bearings, seals, housing, motor and other auxiliary components and assembling them into a finished gearbox.

Slewing drives function with standard worm technology, in which the worm on the horizontal shaft acts as the driver for the gear. The rotation of the horizontal screw turns a gear about an axis perpendicular to the screw axis. This combination reduces the speed of the driven member and also multiplies its torque; increasing it proportionally as the speed decreases.The speed ratio of shafts depends upon the relation of the number of threads on the worm to the number of teeth in the worm wheel or gear.

There are a lot of people who have errors when installing the slewing drive. The wrong way of using the slewing drive has no way to play its role or cause the device to have no way to use it. So what is the correct way to use the slewing drive? Next, Jiangsu Shuangzheng Machinery will tell you about the use of the slewing drive :

We can use hydraulic presses when installing rotary drives in large quantities. When pressing in, it is necessary to ensure the end face of the outer ring and the shoulder end face of the outer casing, and the end face of the inner ring and the end face of the shoulder of the shaft are pressed tightly, and no gap is allowed. When the interference is large, it can be installed by oil bath heating or sensor heating rotary driving method. The heating temperature ranges from 80 °C to 100 °C, and the maximum temperature cannot exceed 120 °C


At the same time, the nut is used or other suitable method to tighten the slewing drive to prevent the slewing drive from shrinking in the width direction after cooling and causing a gap between the ferrule and the shoulder. The single row tapered roller slewing drive installation requires final adjustment of the play.

The slewing drive backlash value needs to be determined according to different usage conditions and the amount of interference of the fit. Tests need to be made when necessary. The double-row tapered roller slewing drive and the pump shaft slewing drive have been adjusted for clearance at the time of shipment, and it is not necessary to continue the adjustment during installation.

As technology has improved, more slewing drives are using hourglass worm technology, in which the worm is shaped to engage more teeth in the gear. This increased tooth engagement results in greater strength, efficiency and durability.

There are many applications in which the slewing drive can be utilized, primarily because it is perfect for applications that require both load-holding power and rotational torque strength.