Bonly is one of the TOP 3 manufacturers of Elevator Guide Rails in the world. Below is the brief intro, for your reference. Videos / Webs also available, welcome to check accordingly.#2, For you to know better about Bonly;- This is Jet, global sales director of BONLY Elevator Guide Rail Manufacture Co. I'd like to take this opportunity to introduce you BONLY Lift Rail, the TOP 3 Guide Rail factory worldwide: BONLY Guide Rail plant is located… Show more Bonly is one of the TOP 3 manufacturers of Elevator Guide Rails in the world. Below is the brief intro, for your reference. Videos / Webs also available, welcome to check accordingly.#2, For you to know better about Bonly;- This is Jet, global sales director of BONLY Elevator Guide Rail Manufacture Co. I'd like to take this opportunity to introduce you BONLY Lift Rail, the TOP 3 Guide Rail factory worldwide: BONLY Guide Rail plant is located in east of China, near to Shanghai, with it's own Steel factory and Rolling mill, annual output 500 K (Five Hundred Thousand) ton GR (Guide Rail) raw material, and300 K ton finished GR; with 220 K square meters of of modern industrial factory; 25 years history of steel plant / rolling mill;14 years history of elevator rail machining workshop; BONLY is qualified GR supplier of multinational elevator companies, Schindler, KONE, OTIS, Thyssenkrupp, Mitsubishi, Hyundai . moreover, BONLY supplies GR to hundreds of elevator companies in over 20 countries and regions, including N. America, S. America, Europe, Mideast, and Asia etc. BONLY produces entire / full modules of GR, from T45A to T140B. #3, You may know us better by the YouTube video. BONLY is equipped with most advanced auto-machining factory, producing high quality products, meets ISO standard. Below links (VIDEOS and PICS) under my signature of this mail shows the biggest single GR production factory in the world. ** Kindly note that the video was filmed about 8 years ago, and the current facility is much more developed. Show less

1.1 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)1.2 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… Show more 1.1 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)1.2 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 brings implications to the break distance of safety grip.1.3 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.1.4 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.1.5 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.1.6 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.1.7 Chemical Composition:(C): 0.14%—0.22%;(Si): 0.13%-0.35%;(Mn): 0.35%~0.65%;(P): ≤0.045%;(S): ≤0.045%. Show less