Why Stress Relief Is Required Before Machining Spur Gear Slewing Drive Housings

8 Jun 09, 2026

As a professional manufacturer of spur gear slewing drives, Luoyang LDB Bearing strictly controls the key casting process of housings. All cast housing blanks must be stored outdoors for more than three months to fully release residual stress before formal CNC machining and assembly. This is one of the core processes to ensure long-term stability and durability of the complete unit.

Long-term stable dimensions of spur gear slewing drive housings with no post-operation deformation
The mounting surface maintains precise and consistent flatness, perfectly suited for heavy-duty working conditions of cranes, excavators, forestry machinery, automated equipment and more, achieving superior fitting accuracy during assembly.
Uniform and consistent gear meshing clearance
No unilateral gear wear caused by housing deformation; operating noise is reduced, effectively extending the service life of gears and the whole unit.
Greatly improved anti-overturning and load-bearing capacity
Housings with internal stress eliminated feature better structural toughness. They can stably withstand high-intensity combined axial and radial loads as well as large overturning moments, resisting damage during continuous full-load operation.
Sustained high precision for precision equipment applications
Meets strict rotation accuracy requirements of automated turntables, industrial robots and high-end lifting machinery, with no precision degradation during long-term operation.

PREV Core Definition of Spur Gear Slew Drive and LDB Core Product Series

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Core Definition of Spur Gear Slew Drive and LDB Core Product Series

Spur Gear Slew Drives: Output Speed Range Based on Load Conditions

The output speed of Spur Gear Slew Drives is not a fixed value but is flexibly adjusted according to actual working load and operating conditions, which is a key feature that ensures the drive’s transmission efficiency and service life.

Protective Performance of Spur Gear Slew Drives

Spur Gear Slew Drives feature a structurally optimized design with customizable protective configurations, enabling them to adapt to various harsh working environments and maintain stable transmission performance. Their protective performance is mainly reflected in the following aspects

Compatibility of Spur Gear Slew Drives with Power Sources

Electric MotorsThis is the most common and mainstream matching power source. AC asynchronous motors, DC servo motors, and stepping motors can all be directly connected to the drive via a coupling or reducer adapter. It is particularly suitable for precision transmission scenarios such as automated production lines and CNC equipment, where it can leverage the high control accuracy of motors to achieve stable speed regulation and positioning.

Product Note: Lubricant Replacement Interval for Spur Gear Slew Drives

Normal Operating ConditionsFor standard industrial scenarios (temperature between -30°C and 50°C, medium load, 8-hour daily operation, and clean working environment), lubricant replacement is recommended every 6–12 months or after 2,000–3,000 operating hours, whichever comes first. This interval ensures that the gear meshing surface remains well-lubricated, reducing wear and maintaining transmission efficiency.