🔧 1PCS D19L25 Aluminum Alloy Flexible Coupling Set Screw Type Motor Encoder Shaft Coupler Inner Hole 2mm-14mm
This premium D19L25 Aluminum Alloy Elastic Coupling is precisely made of 6063 aluminum alloy. It features excellent cushioning, shock absorption and wear resistance performance, widely used for shaft connection of stepper motors, encoders, lead screws and other precision transmission systems. Each coupling is equipped with 4 M4 grub screws, and one hex wrench will be sent for free per order.
⭐ Main Features & Advantages of Aluminum Elastic Coupling
- 🎯 Elastic Buffering Design: Compensate minor misalignment between two connected shafts effectively.
- 🛡️ Shock Absorption Function: Absorb impact load to protect motors and connected loads well.
- ⚙️ High Precision Machining: Made of 6063 aluminum alloy, high concentricity ensures smooth rotation.
- 🔧 Easy Assembly & Disassembly: Simple overall structure, convenient to install and take apart.
- 💪 Good Wear Resistance: Durable aluminum material extends long service life.
- 🔩 Four-point Locking Design: 4 M4 set screws for even fastening, firm and stable connection.
- 📦 Complete Accessories: Matched screws and free wrench support direct installation use.
📊 Technical Specifications of D19L25 Shaft Coupler
| Product Model | D19L25 |
|---|---|
| Main Material | 6063 Aluminum Alloy |
| Outer Diameter | 19mm |
| Total Length | 25mm |
| Structure Style | Elastic type with spiral parallel groove |
| Fixing Method | 4 pieces M4 grub set screws locking |
| Matched Accessories | 4pcs M4 screws + 1 free hex wrench per order |
| Optional Bore Combinations | Rich dual bore sizes: 2/3/4/5/6/6.35/7/8/10/12/14mm various matching options |
| Packing Unit | 1 piece per pack |
| Core Performance | Dustproof, shockproof, deviation compensation, stable transmission |
| Wide Application | Stepper motor, encoder, 3D printer, robot, CNC engraving machine, automatic precision equipment |
❓ Frequently Asked Questions
🔧 How to install this elastic coupling?
Fit two ends of the coupling onto driving shaft and driven shaft respectively, adjust proper inserting depth. Tighten the 4 M4 screws in diagonal order with the matched wrench, then rotate manually to check smooth running condition.
📌 What deviation can this coupling compensate?
It can well make up for tiny axial, radial and angular misalignment during installation, greatly reduce transmission vibration, but it cannot replace strict precise shaft alignment work.
⚠️ What installation notes should be noticed?
Align set screws with flat position of motor shaft for tighter locking. Tighten four screws evenly, avoid over-tightening single side. Only one wrench is offered per order, purchase separately for bulk orders.
🤖 Where is this coupling widely used?
Ideal for connecting stepper motor with lead screw and pulley, flexible connection between encoder shaft and motor shaft, 3D printer Z-axis transmission, robot joint drive, CNC spindle drive and various automatic precision transmission devices.
✏️ Can I customize special bore sizes?
Yes, we support customized processing for special inner hole combinations, you can contact us to confirm your personalized demands.
📦 What is included in the package?
1 piece selected size D19L25 aluminum alloy elastic coupling, 4 pre-installed M4 grub screws, 1 free hex wrench for each order.
💎 Why Choose Our D19L25 Aluminum Elastic Coupling?
Our D19L25 Aluminum Alloy Flexible Coupling adopts high-quality 6063 aluminum alloy raw material with fine finishing craft. Integrated elastic grooved design owns great shock absorption and deviation compensation capability, effectively protect power components and lower operation noise. Equipped with four uniform locking screws to ensure non-slip and stable power output. Multiple dual inner hole specifications cover most mainstream micro motor and transmission shaft sizes. Easy installation, stable performance and long service life, it is the perfect matching connector for your precision mechanical transmission projects!
On May 21, 2026 at 15:03:55 PDT, seller added the following information: