iHF High Quality Aluminum Alloy Stainless Steel Motor Shaft Couplings
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Position: Home > Product Center > iHF > Coupling > iHF Factory Outlet Double Diaphragm Coupling Shaft Couplers for Shaft
iHF Factory Outlet Double Diaphragm Coupling Shaft Couplers for Shaft
Drive the world with planetary transmission and lead the future with precision manufacturing
Product features:
High-Flexibility Screw Clamping/Fixing Type Aluminum Alloy Double Diaphragm Coupling
1. Core Materials
- Hub: High-strength aluminum alloy
- Diaphragm: 304 stainless steel
2. Key Performance Characteristics
- High torsional rigidity for precise shaft rotation control
- Zero-backlash hub connection ensures transmission accuracy
- Ultra-low inertia with high sensitivity, ideal for high-speed operation
- Bidirectional symmetry with identical CW/CCW rotation characteristics
3. Engineering Design Features
- Optimized for servo/stepper motor applications
- Stainless steel diaphragm effectively compensates angular and axial misalignment
4. Typical Applications
- High-precision automation equipment
- Industrial robotic joints
- CNC machining centers
- Precision instrument drive systems
| Model | L | Allowable Torque (N·m) | Allowable Misalignment (Radial) (mm) | Allowable Angular Misalignment (<°) | Allowable Axial Displacement (mm) | Maximum Allowable Speed (RPM) | Static Torsional Stiffness (N.m/rad) | Moment of Inertia (N.m) | Coupling Weight (g) | |
| Type | D | |||||||||
| QLJAW | 20 | 28.8 | 1 | 0.1 | 2 | ±0.20 | 10000 | 500 | 1.1×10-7 | 19 |
| 26 | 35 | 1.5 | 0.15 | 1.5 | ±0.30 | 10000 | 1850 | 2.8×10-6 | 29 | |
| 29 | 34.3 | 3 | 0.15 | 2 | ±0.30 | 10000 | 1200 | 5.5×10-6 | 44 | |
| 32 | 41 | 2 | 0.17 | 1.5 | ±0.36 | 10000 | 2850 | 7.6×10-6 | 60 | |
| 34 | 45 | 3 | 0.17 | 1.5 | ±0.36 | 10000 | 4050 | 9.0×10-6 | 69 | |
| 39 | 50 | 6 | 0.22 | 1.5 | ±0.45 | 10000 | 9000 | 2.7×10-5 | 101 | |
| 44 | 50 | 9 | 0.22 | 1.5 | ±0.54 | 10000 | 10000 | 4.2×10-5 | 190 | |
| 50 | 57 | 16 | 0.23 | 1.5 | ±0.68 | 10000 | 16000 | 2.8×10-4 | 240 | |
| 56 | 64 | 25 | 0.27 | 1.5 | ±0.72 | 10000 | 25000 | 3.6×10-4 | 318 | |
| 68 | 75 | 60 | 0.32 | 1.5 | ±0.80 | 9000 | 35000 | 2.0×10-4 | 492 | |
| 82 | 98 | 80 | 0.55 | 1.5 | ±1.30 | 8000 | 70000 | 1.8×10-4 | 1015 | |
| QLAW | 19 | 27 | 1 | 0.12 | 1.5 | ±0.18 | 10000 | 700 | 9.1×10-7 | 14 |
| 20 | 28.8 | 1 | 0.10 | 2.0 | ±0.20 | 10000 | 550 | 1.1×10-6 | 19 | |
| 26 | 35 | 2 | 0.15 | 1.5 | ±0.30 | 10000 | 1850 | 3.0×10-6 | 37 | |
| 29 | 34.3 | 2 | 0.15 | 2.0 | ±0.30 | 10000 | 1200 | 5.5×10-6 | 43 | |
| 32 | 41 | 6 | 0.17 | 1.5 | ±0.36 | 10000 | 2850 | 7.6×10-6 | 67 | |
| 33 | 40 | 6 | 0.20 | 2.0 | ±0.40 | 10000 | 1500 | 1.1×10-5 | 60 | |
| 34 | 45 | 6 | 0.17 | 1.5 | ±0.36 | 10000 | 4050 | 9.0×10-6 | 77 | |
| 39 | 50 | 13 | 0.22 | 1.5 | ±0.45 | 10000 | 9000 | 3.0×10-5 | 118 | |
| 44 | 50 | 15 | 0.22 | 1.5 | ±0.54 | 10000 | 10000 | 3.8×10-5 | 144 | |
| 56 | 64 | 28 | 0.27 | 1.5 | ±0.72 | 10000 | 25000 | 1.6×10-5 | 318 | |
| 68 | 75 | 30 | 0.31 | 1.5 | ±0.80 | 9000 | 35000 | 2.0×10-4 | 492 | |
| 82 | 98 | 100 | 0.55 | 1.5 | ±0.80 | 8000 | 70000 | 2.5×10-4 | 1013 | |
The inner bores on both ends of the coupling can be freely combined between minimum and maximum diameters, machined to H7 standard tolerance. Bore dimensions listed in tables are for reference only; for custom bore requirements, please contact our customer support, sales representatives, or technical personnel for detailed parameters.
| Model | L | d1,d2(Keyway bore diameters are selectable for sizes above 6mm.) | LF | φd3 | F | QLAW | QLJAW | ||||
| Type | D | QLAW | QLJAW | M | Fastening Torque (N.m) | M | Fastening Torque (N.m) | ||||
| QLAW | 19 | 27 | 3 4 5 6 6.35 7 8 | 9.1 | 9 | 3.3 | - | M2.5 | 0.8 | - | - |
| QLAW QLJAW | 20 | 28.8 | 3 4 5 6 6.35 7 8 | 11 | 8.5 | 3.5 | 5.5 | M2.5 | 1 | M3 | 0.7 |
| 26 | 35 | 5 6 6.35 7 8 9 9.525 10 11 12 14 | 11.35 | 12.5 | 3.9 | 3.9 | M3 | 1.2 | M4 | 2.5 | |
| 29 | 34.3 | 5 6 6.35 7 8 9 9.525 10 11 12 14 | 11.9 | 14.5 | 3.5 | 5.5 | M3 | 1 | M4 | 1.7 | |
| 32 | 41 | 5 6 6.35 7 8 9 9.525 10 11 12 12.7 14 15 | 12.25 | 15 | 3.85 | 6.12 | M3 | 1.2 | M4 | 2.5 | |
| *33 | 40 | 5 6 6.35 7 8 9 9.525 10 11 12 12.7 14 15 16 | 13 | 16.5 | 4.0 | 6.5 | M3 | 1.5 | M4 | 1.7 | |
| 34 | 45 | 5 6 6.35 7 8 9 9.525 10 11 12 12.7 14 15 16 | 14.25 | 16 | 4.85 | 7.5 | M4 | 2.5 | M5 | 5.0 | |
| 39 | 50 | 8 9 9.525 10 11 12 12.7 14 15 16 17 18 19 | 14.9 | 19.3 | 5.0 | 7.5 | M4 | 2.5 | M5 | 5.0 | |
| 44 | 50 | 8 9 9.525 10 11 12 12.7 14 15 16 17 18 19 20 | 14.9 | 22.5 | 5.0 | 8.12 | M4 | 2.5 | M6 | 8.0 | |
| *50 | 57 | 8 9 9.525 10 11 12 12.7 14 15 16 17 18 19 20 22 25 | 18.6 | 23 | 5.8 | 9.4 | M5 | 5.0 | M8 | 20 | |
| 56 | 64 | 10 12 14 15 16 17 18 19 20 22 24 25 28 30 32 | 19.75 | 32.5 | 6.4 | 6.4 | M5 | 5.0 | M8 | 20 | |
| 68 | 75 | 12 14 15 16 17 18 19 20 22 24 25 28 30 32 35 38 | 23.35 | 38.3 | 7.7 | 7.7 | M5 | 8.0 | M8 | 20 | |
| 82 | 98 | 17 18 19 20 22 24 25 28 30 32 35 38 40 42 *45 *46 *50 | 30 | 45.5 | 9.7 | 9.7 | M6 | 20 | M10 | 40 | |
The moment of inertia and all technical parameters provided are measured with the maximum bore size as the reference standard. The maximum rated torque correlates directly with the coupling's fatigue life. Larger outer diameters increase load capacity, while smaller outer diameters permit higher maximum allowable speeds.
The QLAW model does not support the D50 specification, and the QLJAW model is not compatible with the D33 specification.
| Model | Type | Material | Surface Treatment | Accessories | ||
| Housing | Diaphragm | |||||
| QLAW | Double Diaphragm | High-Flexibility Screw Clamping Type | Aluminum Alloy | Stainless Steel | Anodized | Socket Head Cap Screw(SHCS) |
| QLJAW | High-Flexibility Cross-Pinned Set Screw Fixation | Hex Socket Set Screw | ||||
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iHF Industrial Transmission Technology (Guangdong) Co., Ltd. a high-tech enterprise specializing in precision transmission
