Plum Blossom Elastic Coupling
- Typical Applications : Servo motors, CNC machine tools, light industrial machinery, suitable for temperatures of -35℃~80℃.
- Material : Polyurethane (wear-resistant), cast nylon (high rigidity), hardness optional 55-95 Shore A.
- Permissible torque : 16 N·m ~ 25,000 N·m, polyurethane elastomer impact resistant.
-
Permissible speed :
≤30,000 r/min (high precision model), ordinary model ≤1,900 r/min.
- INTRODUCTION
- SPECIFICATION
- RELATED
- INQUIRY
Plum Blossom Elastic Coupling Technical Specifications
1. Overview
Compliant with GB/T 5272-2017 standard, plum blossom couplings provide vibration damping and misalignment compensation for medium-duty applications. Ideal for servo systems, pumps, and automation equipment with torque capacities up to 25,000 N·m.
2. Structure & Operation
Hubs: Aluminum/steel with keyless clamping options
Elastomer: PU/NBR/PA spider insert
Compensation: Axial ±5mm, Radial 2mm, Angular 1.5°
3. Technical Features
| Parameter | Specification |
|---|---|
| Torque Range | 0.25-25,000 N·m |
| Max Speed | 18,000 RPM |
| Temperature | -40℃~120℃ (PA material) |
4. Technical Parameters
| Model | Torque | Speed | Bore Size |
|---|---|---|---|
| ML1 | 0.25 N·m | 18,000 RPM | 4-12mm |
| ML10 | 2,500 N·m | 3,000 RPM | 60-100mm |
5. Applications
Precision Machinery: CNC spindles, robotics
Energy Systems: Solar trackers, small wind turbines
General Industry: Pumps, compressors
6. Selection & Installation
Torque Formula: T = 9550 × P/n
Alignment: ≤0.1mm radial deviation
Fastening: 10-12 N·m for M6 bolts
7. Maintenance Protocol
Monthly elastomer inspections
Replace at 10% thickness reduction
Annual vibration analysis
8. Product Comparison
| Feature | Plum Coupling | Gear Coupling |
|---|---|---|
| Maintenance | Spider replacement only | Regular lubrication |
| Precision | G6.3 balance grade | G16 grade |
9. Compliance Standards
GB/T 5272-2017
ISO 9001 (Premium models)
10. Summary
With 5-8 year elastomer life and maintenance-free operation, plum couplings excel in medium-duty precision drives. Not recommended for heavy shock loads (>500kW) or extreme temperatures.
| Model | Rated Torque (N·m) | Max Speed (r/min) | Bore Range (mm) | Allowable Offset | Weight (kg) |
|---|---|---|---|---|---|
| ML1 | 25 | 8000 | 6-20 | ±1.5° 0.2mm | 0.35 |
| ML3 | 160 | 6000 | 14-40 | ±2.0° 0.5mm | 1.8 |
| ML5 | 630 | 4500 | 25-60 | ±2.5° 0.8mm | 4.5 |
Technical Specifications:
Elastomer: Polyurethane (Shore 92A-98A)
Temperature range: -40℃ to +90℃
Chemical resistance: Oil & grease proof
Flange Material: 6061-T6 aluminum
Torque Capacity: 200% overload for 3 sec
Standards: ISO 1403, DIN 740-1
Backlash: ≤0.1mm
Key Features:
Vibration damping: 30% better than standard couplings
Maintenance-free operation
Electrically isolating (10⁶ Ω resistance)
Quick assembly/disassembly design
* Allowable offset includes angular & radial misalignment
** Standard bore tolerance: H7
† Custom elastomer compounds available (FDA/USDA approved)
