Zhejiang Bonly Elevator Guide Rail Manufacture Co., Ltd._Machined Guide Rail
Bonly Elevator Guide Rail
Machined Guide Rail Properties

Modern and Advance Manufacturing Process, Fully Automated Manufacturing Line, Lean Six Sigma, 24/7/365 Customer Service, Integrated Network, Automatic Vision Inspection System (AVIS)

 Surface Roughness

Roughness of guide rail surface will directly impact the movement smoothness of guide shoe, and causing the grease storage of the guide rail. This brings consequence to the movement smoothness of cart and comfort of passenger. Finally it also bring implications to the break distance of safety grip.
Perpendicularity

Perpendicularity is meant the perpendicular from top surface and bottom milling surface of guide rail, ISO standard specification is ≤0.1mm. The perpendicularity will impact the guide rail joint accuracy and brings implication to the elevator smoothness and comfort.

 Parallelism

It means the parallelism of bottom milling surface and top surface of the guide rail, ISO standard specification is ≤0.2mm. The parallelism will impact the joint precision of guide rail and further reducing the smoothness and comfort of elevator.

 Centering

It means the centering of tongue and groove, ISO standard specification is ≤0.1mm, high precision elevator guide rail is between ≤0.05mm and ≤0.03mm. Centering brings significant impact to the guide rail
joint precision, 2 guide rails failed in the centering specification when joint together will reducing the movement smoothness of guide shoe, it further will influence to the stability movement and comfort of elevator.

Tensile Strength

This is one of the most important mechanical property, ISO standard specification is between 410MPa and 520MPa. The tensile strength of guide rail will ensure the safety grip having sufficient support during the break mechanism taking place.

Chemical Composition

（C）：0.14%—0.22%；
（Si）：0.13%-0.35%；
（Mn）：0.35%~0.65% ；
（P）≤0.045%；
（S）≤0.045%。
Increase carbon content in steel, the breaking point and tensile strength will be increased as well but the elongation and resistance to impact will be reduced.
Silicon acts as a reducing and deoxidizing agent, Manganese acts as deoxidizing and desulfurizing agent, both improve toughness and strength property of steel. Phosphorus and Sulphurn are toxic agents in the steel, both reduce elongation and toughness property of steel, theirs content is less than 0.045%. The hardness of guide rail will ensure the safety grip gains sufficient friction during the break mechanism.
Straightness and Twist
直线度是指导轨导向面直线方向的偏移量，可分顶面直线
度和侧面直线度。顶面直线度是指导向面顶面直线方向的
偏移量，侧面直线度指导向面侧面直线方向的偏移量。
导轨上的弯曲点会给导靴施加一个反作用力，从而造成轿
厢晃动，随着电梯速度增加，轿厢运行时会不平稳甚至有
震动感，影响乘客舒适度。
国家标准要求a长度内B/A≤0.001（a不小于1m），a指
最小测量长度，B指测量点偏移基准面最大距离，A是指
偏移量最大的测量点到基准点的最短距离。 高速电梯使
用的高精度导轨要求更高，要求5m长度不超过1mm。
Naming of Guide Rail

Naming of guide rail follows ISO standard, machined guide rail consists of 3 elements e.g. T type guide rail, width of the base and manufacturing process. /A means cold drawn guide rail, /B means machined guide rail, /BE means high precision machined guide rail, if there is necessity using the numbering to show the width of the base and cutting plane of the guide rail e.g. T45/A, T50/A, T70-1/B, T75/B, T78/B,
T82/B, T89/B, T90/B, T114/B, T127/B, T127-1/B, T140-1/B, T140-2/B, T140-3/B.