Flexible Couplings
ML Jaw Coupling
ML Jaw Coupling with model-specific technical data, engineering context and assembly drawing for preliminary selection.
Product Overview
ML is a jaw coupling with two bore-length families in its model table. Nominal torque, speed, multiple bore forms, D/D1 and E-series dimensions, and mass define a compact elastomeric-jaw package. Select the correct spider and hub geometry from the drawing, then verify that the shaft spacing and misalignment stay within the element’s limits. The published model tables contain 39 size rows and provide torque values spanning 25–12500 N·m, permissible-speed values spanning 1500–8500 r/min, bore values spanning 12–140 mm. Use those values for preliminary comparison only; final materials, current standards, manufacturing details and operating suitability require confirmation from RONGXING DRIVE.
Key Features
- Compact jaw-and-elastomer coupling
- Two bore-length families and E-series clearances
- Torque, speed, D/D1 and mass by model
- The model data provides torque values spanning 25–12500 N·m, permissible-speed values spanning 1500–8500 r/min, bore values spanning 12–140 mm for a traceable preliminary comparison.
Typical Selection Context
- Compact motor, pump and automation shaft connections
- Drive interfaces requiring a replaceable elastomeric spider
Technical Specification
The following model tables are provided for preliminary comparison. Keep the relevant assembly drawing with the selected row.
| Model | Nominal torque Tn N·m | Permissible speed [n] r/min | Bore diameter d d₁ dz | Bore length Y J₁ Z₁ type L | Bore length Z J type L₁ | Dimensions D | Dimensions D₁ | E E₁ E₂ | Mass kg |
|---|---|---|---|---|---|---|---|---|---|
| ML1 | 25 | 8500 | 12~24 | 27~52 | - | 50 | 90 | 16 | 1.06 |
| MLZ1 | 22 | 1.67 | |||||||
| MLS1 | 28 | 2.3 | |||||||
| ML2 | 100 | 6900 | 20~32 | 38~82 | - | 70 | 110 | 23 | 2.6 |
| MLZ2 | 30 | 3.87 | |||||||
| MLS2 | 37 | 5.13 | |||||||
| ML3 | 140 | 6000 | 22~38 | 38~82 | - | 85 | 125 | 24 | 3.9 |
| MLZ3 | 32 | 5.53 | |||||||
| MLS3 | 40 | 7.18 | |||||||
| ML4 | 250 | 5000 | 25~42 | 44~112 | - | 105 | 150 | 27 | 6.43 |
| MLZ4 | 38.5 | 10.4 | |||||||
| MLS4 | 50 | 14.24 | |||||||
| ML5 | 400 | 4100 | 30~48 | 60~118 | 82~112 | 125 | 185 | 33 | 9.1 |
| MLZ5 | 45 | 14.72 | |||||||
| MLS5 | 56 | 20.35 | |||||||
| ML6 | 630 | 3600 | ※ ※ 35~42~55 | 60~112 | 82~112 | 145 | 205 | 39 | 12.19 |
| MLZ6 | 52 | 18.94 | |||||||
| MLS6 | 64 | 26.04 | |||||||
| ML7 | 1120 | 3100 | ※ ※ 45~48~65 | 84~142 | 112~142 | 170 | 240 | 41 | 19.92 |
| MLZ7 | 55 | 31.29 | |||||||
| MLS7 | 68 | 42.66 | |||||||
| ML8 | 1800 | 2700 | ※ ※ 50~55~75 | 84~142 | 112~142 | 200 | 270 | 48 | 29.7 |
| MLZ8 | 64 | 44.41 | |||||||
| MLS8 | 78 | 59.13 | |||||||
| ML9 | 2800 | 2500 | ※ ※ 60~65~95 | 107~172 | 142~172 | 230 | 305 | 50 | 51.58 |
| MLZ9 | 69 | 76.26 | |||||||
| MLS9 | 86 | 100.94 | |||||||
| ML10 | 4500 | 2200 | ※ ※ 70~85~110 | 107~212 | 142~212 | 260 | 350 | 60 | 88.68 |
| MLZ10 | 84 | 123.24 | |||||||
| MLS10 | 108 | 157.74 | |||||||
| ML11 | 6300 | 1900 | ※ ※ 80~95~120 | 132~212 | 172~212 | 300 | 400 | 67 | 113.21 |
| MLZ11 | 91 | 155.08 | |||||||
| MLS11 | 115 | 196.95 | |||||||
| ML12 | 11200 | 1600 | ※ ※ 90~125~130 | 132~252 | 172~252 | 360 | 460 | 73 | 158.1 |
| MLZ12 | 98 | 220.72 | |||||||
| MLS12 | 123 | 283.33 | |||||||
| ML13 | 12500 | 1500 | ※ ※ 100~140 | 167~252 | 212~252 | 400 | 500 | 73 | 177.8 |
| MLZ13 | 98 | 241.53 | |||||||
| MLS13 | 123 | 305.27 |
Engineering Context
This model is best understood from its own construction: Compact jaw-and-elastomer coupling; Two bore-length families and E-series clearances; Torque, speed, D/D1 and mass by model Industry selection practice checks torque and speed together with the movement, shaft interface, installation envelope and maintenance conditions allowed by that construction.
Technical Notes
- Model symbols, units and empty or placeholder cells are shown as published.
- Dimension letters must be interpreted with the relevant assembly drawing.
- Published values support preliminary review and do not replace final engineering confirmation.
Assembly Drawing

Information Required for Selection
- Specify bore family, shaft spacing, spider material and guard clearance
- Check torque, speed, E/E1/E2, misalignment and temperature
- Send the exact model row, assembly drawing and actual duty data with the inquiry.
Product FAQ
What is the spider’s role in ML?
The elastomeric spider transmits torque between the jaws and provides the coupling’s defined flexibility.
Why are two bore-length families listed?
They accommodate different shaft extensions and installation depths; the drawing determines the correct one.
Are the published values final ordering values?
No. They are preliminary engineering data; confirm the selected model, drawing, dimensions, materials, standard and suitability with RONGXING DRIVE.
Technical data is provided for preliminary selection. Confirm the final model, dimensions, materials, applicable standard and operating suitability with RONGXING DRIVE before quotation, manufacture or installation.