Zhejiang Bonly Elevator Guide Rail Manufacture Co., Ltd._Hollow Guide Rail
Bonly Elevator Guide Rail

Straightness, Twist

Hollow guide rail is used on counter weight frame, it provides guidance for counter weight system during elevator movements. Any defective will cause counter weight system imbalance and bring impacts to cart
movement, and comfort. Unstable of counter weight movement will even causing the hauling rope slips, it is hazardous to the elevator movement.


Perpendicularity of edge means the perpendicularity between cutting edge and bottom surface of hollow guide rail, the ISO standard specification is ≤0.2mm. The perpendicularity will affect the joint accuracy and futher affecting the balancing and stability of counter weight movement.