Flexible Couplings
LJ Radial Flexible Pin Coupling
LJ Radial Flexible Pin Coupling with model-specific technical data, engineering context and assembly drawing for preliminary selection.
Product Overview
LJ is a radial flexible pin coupling with three bore arrangements and a table that includes torque, speed, D/D1/S/B1, inertia and mass. The radial layout is the defining selection point: shaft-end geometry and radial access must be checked with the resilient pin element, especially where axial assembly space is limited. The published model tables contain 16 size rows and provide torque values spanning 1.25–355 N·m, permissible-speed values spanning 1200–5000 r/min, bore values spanning 25–260 mm. Use those values for preliminary comparison only; final materials, current standards, manufacturing details and operating suitability require confirmation from RONGXING DRIVE.
Key Features
- Radial flexible-pin arrangement
- Three bore and bore-length options by model
- B1 and D/D1/S dimensions define radial package
- The model data provides torque values spanning 1.25–355 N·m, permissible-speed values spanning 1200–5000 r/min, bore values spanning 25–260 mm for a traceable preliminary comparison.
Typical Selection Context
- Motor and gearbox interfaces with radial assembly constraints
- Industrial lines where flexible pins and radial access simplify maintenance
Technical Specification
The following model tables are provided for preliminary comparison. Keep the relevant assembly drawing with the selected row.
| Model | Nominal torque Tn kN·m | Permissible speed [n] r/min | Bore diameter d₁ d₂ d₃ | Bore length Y J Z J₁ L L₁ | D | D₁ | S | B₁ | Mass moment of inertia kg·m² | Mass kg |
|---|---|---|---|---|---|---|---|---|---|---|
| LJ1 | 1.25 | 5000 | 25～45※～48※ | 44～112 | 158 | 75 | 4 | 84 | 0.026 | 11.9 |
| LJ2 | 2 | 4400 | 30～50※～56※ | 60～112 | 178 | 85 | 4 | 88 | 0.051 | 19.3 |
| LJ3 | 3.15 | 4000 | 30～65 | 60～142 | 200 | 100 | 4 | 96 | 0.091 | 23.5 |
| LJ4 | 4.5 | 3500 | 30～75 | 60～142 | 224 | 120 | 4 | 100 | 0.166 | 31.4 |
| LJ5 | 6.3 | 3000 | 40～90※～95※ | 84～117 | 260 | 140 | 6 | 114 | 0.34 | 52.3 |
| LJ6 | 12.5 | 2600 | 50～110 | 84～212 | 320 | 170 | 6 | 118 | 0.8 | 79 |
| LJ7 | 20 | 2500 | 60～120※ | 107～212 | 380 | 190 | 6 | 136 | 1.9 | 125 |
| LJ8 | 31.5 | 2300 | 70～140 | 107～252 | 420 | 220 | 6 | 142 | 3.1 | 171 |
| LJ9 | 45 | 2100 | 80～165 | 132～302 | 470 | 250 | 6 | 148 | 5.4 | 237 |
| LJ10 | 63 | 1900 | 90～180※ | 132～302 | 530 | 280 | 8 | 168 | 9.4 | 328 |
| LJ11 | 80 | 1800 | 90～180 | 132～302 | 580 | 280 | 8 | 168 | 12.9 | 380 |
| LJ12 | 100 | 1700 | 110～200 | 167～352 | 630 | 310 | 8 | 172 | 18.9 | 480 |
| LJ13 | 125 | 1600 | 110～220 | 167～352 | 680 | 340 | 8 | 198 | 28 | 566 |
| LJ14 | 160 | 1500 | 130～240 | 202～410 | 740 | 370 | 8 | 202 | 42 | 777 |
| LJ15 | 250 | 1400 | 150～260 | 202～410 | 840 | 400 | 8 | 206 | 70 | 1030 |
| LJ16 | 355 | 1200 | 160～260 | 242～410 | 940 | 400 | 8 | 212 | 110 | 1240 |
Engineering Context
This model is best understood from its own construction: Radial flexible-pin arrangement; Three bore and bore-length options by model; B1 and D/D1/S dimensions define radial package 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
- Confirm radial access, bore forms, shaft extensions and pin replacement space
- Compare torque, speed, B1, inertia, mass and permitted displacement
- Send the exact model row, assembly drawing and actual duty data with the inquiry.
Product FAQ
What does radial mean for LJ installation?
The coupling’s service and assembly access are organized around a radial pin arrangement; follow the drawing.
Is LJ chosen only by bore?
No. Torque, speed, radial envelope, displacement and maintenance access also govern the choice.
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.
