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Escalator Step Chain

ESCALATOR STEP CHAINS

  • test report for escalator chain on OTIS 506NECDownload
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Description Shopping Guide Selection of chain drive power Maintenance for roller chain drive
PRODUCT CENTER
JIEFENG GROUP, founded in 2007, is a global elevator and escalator parts manufacturer.
We have own elevator guide rai factory, direct holding escalator step chain factory, own elevator and escalator parts company.
In Product Center, a wide range of JIEFENG' product lines can be found: Elevator machined guide rail, Elevator hollow guide rail, Elevator cold drawn guide rail, Elevator guide rail fish plate, Escalator step chain, Traction machine, elevator and escalator spare parts, etc. 
Escalator step chains
escalator step chain
Escalator drive chains
escalator drive chain

Escalator step chains
● Escalator step chain is used in escalator and moving sidewalk systems to transmit power and transport passengers. It is widely used in escalator facilities such as subway, high-speed rail, airport, shopping malls and large supermarkets.
● Advanced processing and manufacturing technologies such as special structural design and new chain plate blanking are adopted, which have the characteristics of high step distance accuracy, step distance synchronization accuracy and chain length synchronization accuracy, and meet the requirements of stable operation, safety, reliability, environmental resistance and long service life.
● Fully cover the ladder chain products used in escalator industry, and independently develop high-end products with unique structures such as oil cup type and self-lubricating type. Product pitch range: 67mm~136mm, breaking load range: 60kN~1100kN.
Escalator step chains
escalator chain

 
Escalator step chain is a very important part of escalator or moving walk.
 
All of our escalator step chains are have the best quality on the market, all of our suppliers are OEM for known escalator factory, like Otis, Schindler, kone, Thyssen, ect.
 
So we can provide the 100% orginal escalator step chain for you.
 
We have all kinds of escalator step chain, and the details shopping guide as follows;
1, We have to check the brand of the escalator, like Otis, Kone, Schindler ect;
2, Then we must check the type fo the escalator, like Otis 506, 506NCE, ect;
3, Then we can check all the data sheet of the escalator step chain, like pithc distance, diamter of roller, diameter of pin, etc;

A Thickness of outer link plate I Width of chain roller
B Thickness of inner link plate J Diameter of step chain roller
C Distance between outer link plates K Height/width of outer link
D Distance between inner link plats L Height/width of inner link
E Length of link plate M Pitch between pins
F Diameter of step connecting pin N Pitch between step connecting pins
G Length of step connecting pin O Roller bearing information
H Diameter of chain pin P Roller pin diameter
  Q Total pin length
 
Escalator chain is used in escalator and moving sidewalk system to transfer power and transport passengers. Escalator chains are widely used in subways, high-speed rail, airports, high-end shopping malls, supermarkets and other places along with escalators and other facilities, including various drive chains, escalator step chains and automatic sidewalk pedal chains.


Commercial type for commercial use
节距
 
Pitch
梯级距
 
Step distance
抗拉强度
Tensile strength
133.33 400.0 75 kN~260 kN
135.46 406.4 70 kN~155 kN
68.40 410.4 98 kN~161.4 kN
135.00 405.0 130 kN~205 kN
136.00 410.4 80 kN~160 kN


Free of lubrication type
节距
 
Pitch
梯级距
 
Step distance
抗拉强度
Tensile strength
133.33 400.0 88 kN~380 kN
135.46 406.4 123 kN~160 kN
101.15 404.6 150 kN~300 kN
100.00 400.0 240 kN~320 kN



Public transport type for public transport
节距
 
Pitch
梯级距
 
Step distance
抗拉强度
Tensile strength
133.33 400.0 130 kN~520 kN
135.46 406.4 150 kN~400 kN
101.15 404.6 120 kN~450 kN
102.60 410.4 170 kN~360 kN



Moving walk pallet chains
节距
 
Pitch
梯级距
 
Step distance
抗拉强度
Tensile strength
133.33 400.0 90 kN~180 kN
135.46 406.4 127 kN~150 kN
120.00 360.0 105 kN~120 kN
Selection of chain drive power
The standard of "Guidelines for the Selection of Roller Chain Drives"(GB/T 18150-2006 / ISO 10823:2004) had been issued. If you try to calculate the actual transmission power of chain, you must consider revising the transmission power of driving sprocket (input power).
Actual power(Corrected power)=input power×service factor× teeth factor Service factor is listed in the following table.
Teeth factor = (19/Zs)1.08 (Zs—tooth number of the small sprocket)

■工况系数表 Service factor table
从动机械特性
Driven Mechanism Characteristic
主动机械特性 Driving Mechanism Characteristic
 
平稳运转 Smooth Running
 
轻微振动 Slight Vibration
 
中等振动 Medium Vibration
平稳运转 Smooth Running 1.0 1.1 1.3
中等振动 Medium Vibration 1.4 1.5 1.7
严重振动 Severe Vibration 1.8 1.9 2.1
The chain factories with long history in the world have their own chain transmission power rating graph and power diagram. We can refer to the GB/T 18150-2006 / ISO 10823:2004 standard selecting the drive power or selecting chain according to the drive power, the condition is that we should know the tooth number of the small sprocket and its speed. Only if the actual power is within the range of rating power of the power rating graph, the selected chain is suitable.
Now we use the transmission part in walking tractor and the transmission power in rotary tillage to proof whether the chain selection is correct.

Chain drive part
Small sprocket speed ns=1351 r/min Tooth number of small sprocket Zs=14
Actual power (Corrected power)=10.944hp=8.16kW
From B series horsepower rating graph, you will find selected 08B-2 chain is suitable.

Ratar y tillage chain part
Small sprocket speed ns=199 r/min Tooth number of small sprocket Zs=13
Actual power (Corrected power)=9.888hp=7.37kW
From A series horsepower rating graph, you will find selected 12A-2 chain is unsuitable. You should choose 16A-1 or 60H-2 heavy duty roller chain instead of 12A-2.

The main characteristics of this power graph are as follows:
For drive Zs=19
Chain length: 120 pitches Transmission ratio: 1 : 3 to 3 : 1 Service life of chain: 15000 hours
排 数 Number of strand 1 2 3 4 5 6
系 数 Factor 1.0 1.7 2.5 3.3 4.1 4.9

功率曲线图(B系列滚子链)

Power rating graph ( B series roller chain )
The main characteristics of this power graph are as follows:
For drive Zs=19
Chain length: 120 pitches Transmission ratio: 1 : 3 to 3 : 1
Service life of chain: 15000 hours

■ 排数系数表 Strand factor table

排 数 Number of strand 1 2 3 4 5 6
系 数 Factor 1.0 1.7 2.5 3.3 4.1 4.9

 
Maintenance for Roller Chain Drive
t’s very practical to illustrate the convention- al maintenance of roller chain drive because of its wide application in industry. Better maintenance, less failure. In practice, only following some simple maintenance principals, we can easily save costs and make its service life longer, and then making the operation more efficient.
1.Each sprocket in the driving system should have good coplanarity and the chain path should always be smooth.
2.The sagging of chain loose side should be suitable and for the adjustable center distance level and angle drive, the sagging should be 1%~2% of the center distance. For conditions of vertical drive and under vibration load、reverse drive and dynamic brake ,the sagging should be smaller. It’s very important to check and adjust the loose side sagging frequently in the chain drive maintenance.
3.Good lubrication is also very important. Whichever lubrication method you choose, the most important thing is to make the lubricating grease distribute evenly in each chain joint clearance. If not necessary, avoid selecting big viscosity heavy oil or lubricating grease since it will jam the clearances gone to joints friction surface with dust after a period of time. Periodi- cally clean the roller chain and check its lubrication condition frequently. Disassembly the pin and bush, if necessary. If the friction surface is brown or dust color, it may be caused by insufficient lubrication.
4.Chains and sprockets should be always in good condition.
5.Frequently check the working surface of sprocket teeth ,adjust or replace it when it’s excessively worn.

Troubleshooting Instructions
Failure Symptom Possible Causes Actions
 
Roller cracked or deformed
1. Too big chain pitch or too small number of sprocket teeth
2. Sprocket teeth have foreign bodies. 3.The chain climbs onto sprocket teeth too high.
4.Excessive chain impact load
1. Select small pitch chain or add sprocket teeth number
2. Remove all the foreign bodies or replace chain 3.Replace the chain and make appropriate tensioning 4.Reduce the impact of chain
 
Pin rotates or plate hole drawn long
 
1.Chain overloaded
 
1.Eliminate the overloading causes or adopt large specification chain
 
Pin broken or plate broken along the hole connecting line direction
 
1.Excessive overloading
 
1.Eliminate the overloading causes or adopt large specification or higher strength chain; if sprocket failure symptom found, replace it
Plates broken
 
 
 
 
 
1.The load above chain dynamic capacity
 
 
1.Selecting big pitch chain or reduce dynamic load
 
Excessive side-wear of plates or sprocket teeth
 
1. Sprocket not coplanar or ending beat severely
2. Bad bearing stiffness of sprocket 3.Severe twist of chain
 
1.Increase machining and installation precision 2.Increase bearing parts stiffness
3.Replace chain
 
Outer link outside rubbed
 
1. Chain not tensioned and jump, then to hit adjacent bodies
2. Chain box deformed or with foreign bodies inside
 
1.Make appropriate chain tensioning 2.Eliminate chain box deformation and remove foreign bodies
 
Pin worn or bush bonded with pin
 
1. Bad lubrication
2. Chain speed too high or chain overloaded
 
1.Supply suitable lubrication system 2.Lower the speed or reduce the load
 
Excessive wear of sprocket
 
1. Bad lubrication
2. Inferior material of sprocket and insuffi- cient teeth surface hardness
 
1.Improve lubrication conditions 2.Improve sprocket material quality and its teeth surface hardness
 
Locking parts such as spring clip and cotter pin etc. become loose.
 
1.Chain wobbling heavily 2.Knock with obstructions 3.Locking parts wrong installed
 
1. Make suitable tensioning or consider adding supporting board for guide plate
2. Remove all obstructions
3. Improve the installation quality of locking parts