Rigid & Special Couplings
QL and QLZ Ball Couplings
QL and QLZ Ball Couplings with model-specific technical data, engineering context and assembly drawing for preliminary selection.
Product Overview
QL and QLZ are ball couplings for a specialized shaft interface. The table lists permissible torque, speed, bore, D/D1/D2/D3, length, clearances C/C1/C2 and mass. Because ball engagement and retention govern the connection, the exact QL or QLZ designation and drawing must be confirmed before the coupling is matched to a shaft. The published model tables contain 19 size rows and provide torque values spanning 0.9–1160 N·m, permissible-speed values spanning 500–4700 r/min, bore values spanning 18–560 mm. Use those values for preliminary comparison only; final materials, current standards, manufacturing details and operating suitability require confirmation from RONGXING DRIVE.
Key Features
- Ball-coupling engagement for a specialized interface
- QL/QLZ bore and D-series geometry by row
- Clearance and mass values support envelope review
- The model data provides torque values spanning 0.9–1160 N·m, permissible-speed values spanning 500–4700 r/min, bore values spanning 18–560 mm for a traceable preliminary comparison.
Typical Selection Context
- Special machine connections designed around a ball interface
- Equipment where compact engagement and defined retention are required
Technical Specification
The following model tables are provided for preliminary comparison. Keep the relevant assembly drawing with the selected row.
| Model | Permissible torque Tn kN·m | Permissible speed [n] r/min | Bore diameter d dz | D | D₁ | D₂ | D₃ | L | Clearance C | Clearance C₁ | Clearance C₂ | Mass kg |
|---|---|---|---|---|---|---|---|---|---|---|---|---|
| QL1 | 0.9 | 4700 | 18～40 | 170 | 110 | 55 | 110 | 55 | 25 | 11 | 18 | 9.8 |
| QL2 | 1.8 | 3900 | 30～50 | 185 | 125 | 70 | 120 | 70 | 25 | 13 | 22 | 13.8 |
| QL3 | 3.6 | 3400 | 40～60 | 220 | 150 | 90 | 150 | 85 | 25 | 15 | 25 | 23 |
| QL4 | 6.4 | 2800 | 45～75 | 250 | 178 | 110 | 170 | 105 | 25 | 17 | 28 | 33 |
| QL5 | 9 | 2500 | 50～80 | 290 | 200 | 130 | 200 | 115 | 5 | 22 | 35 | 52 |
| QL6 | 13.5 | 2000 | 60～105 | 320 | 230 | 140 | 220 | 125 | 5 | 25 | 35 | 73 |
| QL7 | 21.8 | 1900 | 65～120 | 350 | 255 | 170 | 250 | 140 | 5 | 25 | 40 | 100 |
| QL8 | 27 | 1600 | 80～140 | 380 | 285 | 190 | 280 | 160 | 5 | 30 | 45 | 132 |
| QL9 | 35 | 1400 | 90～160 | 430 | 320 | 210 | 320 | 165 | 5 | 30 | — | 165 |
| QL10 | 60 | 1200 | 110～180 | 490 | 375 | 260 | 380 | 180 | 5 | 30 | — | 250 |
| QL11 | 80 | 1100 | 120～240 | 545 | 410 | 300 | 440 | 200 | 5 | 35 | — | 340 |
| QL12 | 115 | 1000 | 140～250 | 590 | 455 | 340 | 480 | 240 | 5 | 38 | — | 470 |
| QL13 | 168 | 900 | 160～280 | 680 | 505 | 380 | 550 | 260 | 7.5 | 45 | — | 650 |
| QL14 | 229 | 800 | 180～320 | 730 | 580 | 420 | 600 | 280 | 7.5 | 50 | — | 857 |
| QL15 | 280 | 750 | 200～360 | 780 | 660 | 480 | 650 | 320 | 7.5 | 50 | — | 1090 |
| QL16 | 430 | 650 | 230～400 | 900 | 740 | 530 | 750 | 350 | 10 | — | — | 1627 |
| QL17 | 615 | 600 | 260～450 | 1000 | 850 | 630 | 850 | 400 | 10 | — | — | 2120 |
| QL18 | 860 | 550 | 300～500 | 1100 | 960 | 710 | 950 | 450 | 10 | — | — | 3118 |
| QL19 | 1160 | 500 | 350～560 | 1250 | 1030 | 800 | 1050 | 485 | 15 | — | — | 4370 |
Engineering Context
This model is best understood from its own construction: Ball-coupling engagement for a specialized interface; QL/QLZ bore and D-series geometry by row; Clearance and mass values support envelope review 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
- Identify whether the requirement is QL or QLZ and match the drawing
- Check torque, speed, bore, clearances, retention and guard access
- Send the exact model row, assembly drawing and actual duty data with the inquiry.
Product FAQ
Can QL and QLZ be treated as one model?
They are presented together but the exact designation and drawing control the interface.
What does the clearance data tell the engineer?
It defines the engagement and surrounding envelope that must remain free from interference.
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.
