Escalator Step Chain
There are various types of step chains and roller chains used in escalators. Escalator step chains are more durable than regular chains, as the pin diameter is larger and can carry more weight than regular chains. Moreover, they are designed with tight coordination between step chains and chain links to reduce the noise of the ride. Moreover, there are lubrication-free and low-noise chains, which are ideal for escalators installed in quiet environments.
Escalator Step Chain

Step chains in escalators are made with varying pitches to minimize the effects of chordal action. The smallest pitch in an escalator step chain makes it work more smoothly. Installation of an escalator step chain varies by country and building. The bearing part of the chain plate is the focal point of the chain plate and is where the step shaft rests. The extension of the pins on the step shaft and step side will carry the weight of the steps.
Step chains on an escalator are a special type. These escalator components are used to move passengers up and down the escalator. However, the problem with these components is that they can be challenging to assemble and disassemble in the field. It is difficult to force the connecting axle and stub axle together. For a proper press fit, you will need to heat the connecting axle and stub axle and then press them together.
Specifications of Escalator Step Chains
There are various types of step chains and roller chains used in escalators. Step chains are more durable than regular chains, as the pin diameter is larger and can carry more weight than regular chains. Moreover, they are designed with tight coordination between step chains and chain links to reduce the noise of the ride. Moreover, there are lubrication-free and low-noise chains, which are ideal for escalators installed in quiet environments.
| Chain No. | Pitch | Roller diameter | Width between inner plates | Pin diameter | Pin length | Inner plate depth | Plate thickness | Distance between steps (three pitches) | Ultimate tensile strength | Average tensile strength | Weight per step |
| P | d1 | b1 | d2 | L max |
h2 | t/T | Le | Q min |
Q0 | q | |
| mm | mm | mm | mm | mm | mm | mm | mm | kN/lbf | kN | kg | |
| ST131 | 131.33 | 80.00 | 27.0 | 24.00 | 54.5 | 50.0 | 5.0 | 394.00 | 180.0/40465 | 198.0 | 3.700 |
| T131 | 131.33 | 80.00 | 27.0 | 14.63 | 54.5 | 50.0 | 5.0 | 394.00 | 180.0/40465 | 198.0 | 2.480 |
| JJT131 | 131.33 | 80.00 | 27.0 | 14.63 | 56.5 | 35.0 | 5.0 | 394.00 | 123.0/27651 | 150.0 | 2.310 |
| ST133 | 133.33 | 70.00 | 27.0 | 14.63 | 55.0 | 40.0 | 5.0 | 400.00 | 180.0/40465 | 198.0 | 2.450 |
| JJT133 | 133.33 | 70.00 | 27.0 | 14.63 | 56.5 | 35.0 | 5.0 | 400.00 | 127.4/28640 | 140.1 | 2.380 |
| ST133F1 | 133.33 | 80.00 | 27.0 | 24.00 | 54.5 | 50.0 | 5.0 | 400.00 | 180.0/40465 | 198.0 | 3.530 |
| ST133F3 | 133.33 | 75.00 | 25.4 | 14.63 | 54.2 | 35.0 | 5.0 | 400.00 | 123.0/27651 | 135.3 | 2.160 |
ST133F4 |
133.33 | 76.00 | 27.0 | 14.63 | 55.0 | 40.0 | 5.0 | 400.00 | 180.0/40465 | 198.0 | 2.500 |
| ST133F5 | 133.33 | 39.37 | 33.7 | 22.00 | 70.0 | 60.0 | 7.0/6.0 | 400.00 | 350.0/78683 | 385.0 | 4.776 |
| ST133F6 | 133.33 | 39.37 | 33.7 | 16.00 | 65.0 | 50.0 | 5.0 | 400.00 | 170.0/38217 | 187.0 | 3.360 |
| JJT131F1 | 131.33 | 76.20 | 23.6 | 12.70 | 52.0 | 35.0 | 5.0 | 394.00 | 90.0/20232 | 99.0 | 2.050 |
| JJT131F2 | 131.33 | 76.20 | 23.6 | 12.70 | 52.0 | 35.0 | 5.0 | 394.00 | 90.0/20232 | 99.0 | 2.050 |
| JJT131F3 | 131.33 | 76.20 | 23.6 | 15.00 | 52.0 | 35.0 | 5.0 | 394.00 | 123.0/27651 | 135.3 | 2.200 |
| JJT131F4 | 131.33 | 76.20 | 23.6 | 15.00 | 52.0 | 35.0 | 5.0 | 394.00 | 123.0/27651 | 135.3 | 2.200 |
| ST135F2 | 135.47 | 76.20 | 23.6 | 12.7/15.0 | 54.2 | 35.0 | 5.0 | 406.40 | 90/20232 | 99.0 | 2.050 |
Other types of Escalator Step Chains
Chain No. |
Pitch | Roller diameter | Width between inner plates | Pin diameter | Pin length | Bush diameter | Bush length | Plate dimension | Distance between steps | Ultimate tensile strength | Average tensile strength | Weight per step | |||
| P | d1 max | b1 | d2 | L max |
Lc max | d3 | d4 | L1 max |
h2 max | t/T | Le | Q min |
Q0 | q | |
| mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | kN/lbf | kN | kg | |
| C-13T | 68.40 | 32.0 | 20.6 | 14.29 | 45.0 | 50.85 | 23.5 | 28.5 | 40.85 | 38.5 | 4.8 | 410.4 | 127.4/28640 | 140.0 | 2.30 |
| P67-FD | 67.73 | 28.5 | 27.0 | 14.29 | 52.3 | 57.00 | 23.0 | 27.0 | 36.85 | 38.0 | 4.8 | 406.4 | 130.0/299225 | 140.0 | 2.19 |
| C-16V | 68.40 | 28.0 | 29.6 | 14.29 | 53.9 | 59.60 | 22.0 | 26.0 | 29.35 | 39.6 | 4.8 | 410.4 | 161.7/36351 | 178.0 | 2.38 |
| C-12V | 68.40 | 28.0 | 20.7 | 12.70 | 41.9 | 47.40 | 21.0 | 26.0 | 30.50 | 39.6 | 4.0 | 410.4 | 140.0/31473 | 154.0 | 1.82 |
| C-8V | 68.40 | 28.0 | 20.7 | 12.70 | 41.9 | 47.40 | 21.0 | 26.0 | 30.50 | 39.6 | 4.0 | 410.4 | 100.0/224809 | 110.0 | 1.82 |
| ST67HF2 | 67.73 | 28.5 | 27.0 | 14.63 | 52.7 | 57.00 | 23.0 | 27.0 | 36.85 | 40.0 | 4.8/5.5 | 406.4 | 186.2/41859 | 204.0 | 2.31 |
| ST67HF1 | 67.73 | 28.5 | 27.0 | 14.63 | 52.7 | 57.00 | 23.0 | 27.0 | 36.85 | 40.0 | 4.8/5.5 | 406.4 | 160.0/35969 | 176.0 | 2.31 |
| Chain No. | Pitch | Roller diameter | Width between inner plates | Pin diameter | (Hollow) Pin Diameter | Pin length | Plate dimension | Ultimate tensile strength | Average tensile strength | Weight per step | |||
| P | d1 max |
b1 min |
d2 max |
d3 max |
d4 max | L max |
Lc max | h2 | t/T max |
Q min |
Q0 | q | |
| mm | mm | mm | mm | mm | mm | mm | mm | mm | mm | kN/lbf | kN | kg | |
| PT135HP | 135.46 | 45.0 | 23.0 | 25.0 | 20.0 | 28.0 | 47.1 | 55.1 | 70 | 6.0/5.0 | 250/56202 | 275.0 | 4.5 |

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