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DS / DL Aluminium Alloy Diaphragm Coupling – Single & Double Diaphragm Flexible Coupling with Keyway | for Encoder, Servo Motor & Ball Screw | GS/GL Replacement
Model Number
Check below, custom
- Phone : +86 13431039760
- Wechat : +86 13431039760
- Whatsapp : +86 13431039760
- Email : ella@apexcoupling.com
Product Description
DS / DL Aluminium Alloy Diaphragm Coupling – Single & Double Diaphragm Flexible Coupling with Keyway
Factory Direct from Guangdong, China | 7075 Aviation Aluminium | 304 Stainless Steel Diaphragm | H7 Precision Bore | Clamp Type | ISO Certified | Custom Keyways & Bores
Product Overview
The DS / DL Aluminium Alloy Diaphragm Coupling from Apexcoupling is a high-precision flexible shaft coupling engineered for accurate torque transmission, zero backlash, and long service life in demanding motion control applications. Manufactured in Dongguan, Guangdong, China, this coupling is available in single diaphragm (DS) and double diaphragm (DL) configurations, making it ideal for encoders, servo motors, ball screws, and CNC machinery.
The coupling features 7075 aviation-grade aluminium alloy hubs with anodic oxidation treatment, providing an exceptional strength-to-weight ratio and excellent corrosion resistance. The 304 stainless steel diaphragm (four-hole square elastic plate) offers high torsional rigidity, fatigue resistance, and reliable misalignment compensation. The one-piece design with 12.9-grade blackened screws ensures strong locking and high torque capacity.
With an H7 precision bore – 100% inspected by plug gauge – the DS/DL coupling achieves high concentricity and smooth, vibration-free operation. The clamp-type (split-hub) mounting allows for easy installation and removal without shaft damage. All machined edges are chamfered (including R-type fillets at the slit) to prevent hand injuries and stress concentration. The coupling is produced on 5-axis CNC machines in a single setup, ensuring exceptional concentricity and dimensional accuracy.
The DS/DL series is an excellent replacement for imported brands such as GS/GL and other premium diaphragm couplings, offering comparable quality at a competitive factory-direct price. Backed by ISO certification, IP65 protection, and a 1000-hour maintenance interval, this coupling is built for reliable, long-term performance.
📧 Get a Quote: ella@apexcoupling.com
Key Attributes
| Attribute | Value |
|---|---|
| Brand | Apexcoupling |
| Model | Aluminium Single/Double Diaphragm Coupling |
| Coupling Type | Diaphragm Coupling |
| Standard | ISO |
| Material | 7075 Aviation Aluminium Alloy |
| Elastic Element Material | Polyurethane |
| Vibration Damping | Not Supported |
| Max Speed | 1000 rpm |
| Bore Diameter | 45 mm |
| Compensation Type | Radial |
| Rated Torque | 1000 N·m |
| Surface Treatment | Zinc Plating / Anodic Oxidation |
| Customizable Dimensions | Inner Bore Optional |
| Protection Level | IP65 |
| Diameter | 82 mm |
| Maintenance Interval | 1000 hours |
| Installation Method | Clamp Type |
| Inner Diameter | 45 mm |
| Axial Deviation Compensation | 1 mm |
| Wheel Body Material | Aluminium Bronze |
| Hub Material | Aluminium Alloy |
| Place of Origin | Mainland China |
| Certification | ISO |
| Overload Protection | Not Supported |
Key Features
| Feature | Benefit |
|---|---|
| 7075 Aviation Aluminium Alloy | High strength-to-weight ratio, excellent corrosion resistance, and long service life |
| 304 Stainless Steel Diaphragm | Industrial-grade four-hole square elastic plate – corrosion-resistant, anti-oxidation, rust-proof |
| One-Piece Design | Higher torque capacity and greater durability compared to assembled couplings |
| 12.9-Grade Blackened Screws | Strong locking force for secure shaft connection |
| H7 Precision Bore | 100% plug-gauge inspected for high concentricity and accurate shaft fit |
| Clamp Type (Split-Hub) | Easy installation and removal without shaft damage |
| All Edges Chamfered | R-type fillets at the slit and rounded cup-head edges prevent hand injuries and stress concentration |
| 5-Axis CNC Machined | One-time processing for exceptional concentricity and dimensional accuracy |
| Smooth Ball Screw Installation | No reaction force, ensuring precise and stable motion control |
| Imported Brand Replacement | High-quality alternative to GS/GL and other premium diaphragm couplings |
| ISO Certified | Quality assurance and international interchangeability |
| Factory Direct | Competitive pricing and stable supply from China |
Technical Specifications
| Parameter | Details |
|---|---|
| Product Name | Aluminium Alloy Single/Double Diaphragm Coupling |
| Brand | Apexcoupling |
| Series | DS (Single Diaphragm) / DL (Double Diaphragm) |
| Type | Diaphragm Coupling |
| Standard | ISO |
| Material | 7075 Aviation Aluminium Alloy |
| Diaphragm Material | 304 Stainless Steel |
| Wheel Body Material | Aluminium Bronze |
| Hub Material | Aluminium Alloy |
| Elastic Element | Polyurethane |
| Rated Torque | 1000 N·m |
| Max Speed | 1000 rpm |
| Bore Diameter | 45 mm |
| Inner Diameter | 45 mm |
| Diameter | 82 mm |
| Compensation Type | Radial |
| Axial Deviation Compensation | 1 mm |
| Surface Treatment | Zinc Plating / Anodic Oxidation |
| Installation Method | Clamp Type |
| Protection Level | IP65 |
| Maintenance Interval | 1000 hours |
| Overload Protection | Not Supported |
| Certification | ISO |
| Place of Origin | Dongguan, Guangdong, China |
Product Details
01. One-Piece Design with Diaphragm Bolt Locking
The integrated design with diaphragm bolt locking delivers higher torque and greater durability, reducing maintenance costs and extending service life.
02. 304 Stainless Steel Diaphragm
Industrial-grade four-hole square elastic plate – corrosion-resistant, anti-oxidation, and rust-proof for long-term reliability.
03. H7 Precision Bore – 100% Plug Gauge Inspected
Every bore is inspected with a plug gauge to ensure H7 tolerance, providing high concentricity and accurate shaft fit.
04. 7075 Aviation Aluminium Alloy with Anodic Oxidation
Premium aerospace-grade aluminium offers an excellent strength-to-weight ratio and corrosion resistance.
05. 12.9-Grade Blackened Screws
High-strength screws ensure powerful locking and secure torque transmission.
06. Chamfered Edges & R-Type Fillets
All machined edges are chamfered, and the slit features R-type fillets to prevent hand injuries and stress concentration.
07. 5-Axis CNC One-Time Machining
Produced on 5-axis machine tools in a single setup for exceptional concentricity and dimensional accuracy.
Customization Options
Apexcoupling offers extensive customization for aluminium diaphragm couplings:
Custom series: DS (single diaphragm), DL (double diaphragm)
Custom bore diameters and lengths
Keyway, hexagon, square, and spline bores
Alternative materials: 7075 aluminium, 6061 aluminium, stainless steel
Surface treatments: anodic oxidation, zinc plating, nickel plating, polishing
Custom diaphragm thickness and stiffness
Drawing-based production
OEM / ODM / OBM with your branding
📧 Send your drawing or requirements to: ella@apexcoupling.com
Applications
The DS/DL aluminium alloy diaphragm coupling is widely used in:
Encoders – Precise motion feedback and positioning
Servo Motors – High-precision closed-loop control systems
Ball Screws – Smooth, reaction-free linear motion
CNC Machine Tools – Milling, turning, drilling, and engraving machines
Factory Automation (FA) – Robotic arms, conveyors, and pick-and-place systems
Packaging Machinery – High-speed packaging and filling lines
Printing Machinery – Registration and tension control systems
Semiconductor Equipment – Wafer handling and precision stages
Medical Equipment – Diagnostic and surgical positioning devices
General Industrial Drives – Where zero backlash and precise motion control are required
Why Choose Apexcoupling?
🏭 Factory Direct in Dongguan, China – Integrated manufacturing and trading, competitive pricing
🔩 Premium 7075 Aviation Aluminium – High strength-to-weight ratio and excellent corrosion resistance
⚙️ 304 Stainless Steel Diaphragm – High torsional rigidity and fatigue resistance
📐 H7 Precision Bore – 100% Plug Gauge Inspected – High concentricity and accurate fit
🔧 Clamp Type with 12.9-Grade Screws – Secure locking and easy installation
🧾 Imported Brand Replacement – High-quality alternative at a competitive price
✅ ISO Certified & IP65 – Quality assurance and environmental protection
📦 Fast Delivery – Factory stock and efficient production for urgent orders
💬 Expert Technical Support – We help you select the correct coupling for your application
Get a Quote Today
Ready to order or need more information? Contact us directly:
📧 Email: ella@apexcoupling.com
We reply within 24 hours with pricing, availability, and technical recommendations.
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| Type | Outer Diameter (mm) | Length (mm) | Inner Bore Range (mm) |
|---|---|---|---|
| Single Diaphragm | 19 | 20 | 3–8 |
| Single Diaphragm | 26 | 26 | 4–11 |
| Single Diaphragm | 29 | 26 | 6–14 |
| Single Diaphragm | 32 | 28 | 5–16 |
| Single Diaphragm | 34 | 32 | 5–15 |
| Single Diaphragm | 39 | 34.5 | 8–19 |
| Single Diaphragm | 44 | 34.5 | 8–22 |
| Single Diaphragm | 56 | 45 | 10–28 |
| Single Diaphragm | 68 | 53 | 12–35 |
| Single Diaphragm | 82 | 68 | 14–45 |
| Double Diaphragm | 19 | 27 | 3–8 |
| Double Diaphragm | 26 | 35 | 4–11 |
| Double Diaphragm | 29 | 35 | 6–14 |
| Double Diaphragm | 32 | 41 | 5–16 |
| Double Diaphragm | 34 | 45 | 5–15 |
| Double Diaphragm | 39 | 50 | 8–19 |
| Double Diaphragm | 44 | 50 | 8–22 |
| Double Diaphragm | 56 | 64 | 10–28 |
| Double Diaphragm | 68 | 75 | 12–35 |
| Double Diaphragm | 82 | 98 | 14–45 |
Note: Non-standard customization is supported. For more sizes, please contact customer service.
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aluminium diaphragm coupling
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Rotex Replacement Jaw Coupling | Steel Motor Coupling with Elastic Spider | Flexible Shaft Coupling
Model Number
Check below, custom
D30-L35
D40-L66
D55-L78
D65-L90
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D95-L126
D105-L140
D120-L160
D135-L185
D160-L210
D200-L245
D225-L270
- Phone : +86 13431039760
- Wechat : +86 13431039760
- Whatsapp : +86 13431039760
- Email : ella@apexcoupling.com
Product Description
Versatile Performance: Rotex Replacement Elastic Jaw Couplings
The Rotex Series Replacement Couplings are the industry standard for fail-safe, torsionally flexible power transmission. Designed to replace original Rotex units seamlessly, these couplings utilize a “jaw” design with a central elastic spider to dampen vibrations and compensate for unavoidable shaft misalignments. Whether you require Steel Hubs for high-stress applications or standard cast iron, our series provides a reliable, low-maintenance link for your motor drives.
Core Product Advantages
Universal Compatibility: Fully interchangeable with standard Rotex dimensions, allowing for easy drop-in replacement in existing systems.
Superior Vibration Damping: The premium polyurethane spider absorbs shock loads and dampens torsional vibrations, protecting your motor and gearbox.
Fail-Safe Operation: The interlocking jaw design ensures that power transmission continues even if the elastic element is compromised under extreme conditions.
Maintenance-Free & Insulating: Requires no lubrication and provides electrical insulation between the connected shafts.
Durable Steel Construction: Available in high-strength steel or Sintered Steel for maximum torque density and resistance to high-speed centrifugal forces.
Customizable Spider Hardness: Choose from different shore hardness levels (92 Sh-A, 98 Sh-A, 64 Sh-D) to tune the stiffness and damping characteristics of your drive.
Easy Plug-In Assembly: Axial plug-in design allows for rapid installation and visual inspection of the elastic element without moving the connected machinery.
Technical Specifications Table
| Attribute | Specification Details |
| Model Type | Rotex Replacement (GR / GRS / GS) |
| Hub Material | Steel / Sintered Steel / Cast Iron |
| Spider Material | High-Performance Polyurethane (TPU) |
| Torque Range | High Torque Density |
| Temperature Range | -40°C to +90°C (Special up to +120°C) |
| Bore Options | H7 Precision, Keyway, Spline, or Set Screw |
| Customization | OEM Support / Non-standard Bore & Dimensions |
Rotex Equivalent Coupling, Jaw Coupling Spider, Steel Motor Coupling, Elastic Flexible Coupling, Polyurethane Spider Coupling, GR/GRS Coupling.
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