Custom Gear Production Example: Worm Gear for Elevator Hoisting Machine

Improving surface properties using advanced processing techniques!

This is a gear for a mechanical reducer used in elevators. It is classified as a worm gear, and since it is a component used in elevators, the machining precision of the worm gear directly affects the ride comfort during elevator ascents and descents. Additionally, due to the potential risk to human life in case of defects, it requires a machining precision that is much higher than that of typical industrial reducers. At OJIC, we have established a design for tooth engagement that minimizes transmission errors and a quality control system based on the accumulated experience with machine tools. We also adopt large modules that can withstand the weight of the elevator itself. The worm wheel is subject to polygonal errors on the machined surface due to intermittent cutting finishes on the hob machine, so we have utilized advanced machining techniques to improve the surface profile. We have received very positive feedback from our customers, and as a result of this relationship, we have begun manufacturing products that were previously produced in-house by the manufacturers. Similarly, some companies are considering switching to outsourcing due to challenges such as aging in-house equipment and difficulties in securing skilled personnel for gear machining.

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