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DR Economical Bellows Coupling – Aluminium Alloy Flexible Coupling with Stainless Steel Bellows | for CNC Lathe, Stepper Motor & Ball Screw | Custom
Model Number
Check below, custom
- Phone : +86 13431039760
- Wechat : +86 13431039760
- Whatsapp : +86 13431039760
- Email : ella@apexcoupling.com
Product Description
DR Economical Bellows Coupling – Aluminium Alloy Flexible Coupling with Stainless Steel Bellows
Factory Direct from Guangdong, China | Aluminium Alloy Hubs | Stainless Steel Bellows | H7 Precision Bore | 12.9-Grade Screws | Zero Backlash | Up to 10000 rpm | ISO Certified | Custom Bores & Keyways
Product Overview
The DR Economical Bellows 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 ideal for CNC lathes, stepper motors, ball screws, encoders, and other precision drive systems.
The coupling features aluminium alloy hubs with zinc plating for excellent corrosion resistance and durability. The high-elasticity stainless steel bellows provides superior flexibility, compensating for radial, angular, and axial misalignments while maintaining constant velocity even under misalignment. The one-piece bellows design eliminates backlash and ensures identical characteristics in both clockwise and counterclockwise rotation.
With an H7 precision bore and 12.9-grade screws, the DR coupling delivers high concentricity, powerful locking, and reliable torque transmission. The keyway-type mounting ensures secure shaft connection, while the aluminium bronze wheel body adds strength and wear resistance. The coupling operates at speeds up to 10000 rpm with IP65 protection and a 1000-hour maintenance interval.
As a factory direct manufacturer, we support custom bores, keyways, hexagon and square bores, and non-standard sizes. Backed by ISO certification, the DR bellows coupling is an economical and reliable alternative to imported brands, offering excellent performance at a competitive price.
📧 Get a Quote: ella@apexcoupling.com
Key Attributes
| Attribute | Value |
|---|---|
| Brand | Apexcoupling |
| Model | DR Economical Bellows Coupling |
| Coupling Type | Bellows Coupling |
| Standard | ISO |
| Material | Aluminium Alloy |
| Elastic Element Material | Polyurethane |
| Vibration Damping | Not Supported |
| Max Speed | 10000 rpm |
| Bore Diameter | 3 mm |
| Compensation Type | Radial |
| Rated Torque | 1000 N·m |
| Surface Treatment | Zinc Plating |
| Customizable Dimensions | Inner Bore Optional |
| Protection Level | IP65 |
| Diameter | 105 mm |
| Maintenance Interval | 1000 hours |
| Installation Method | Keyway Type |
| Inner Diameter | 50 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 |
|---|---|
| Aluminium Alloy Hubs | Lightweight, corrosion-resistant, and durable |
| Stainless Steel Bellows | High elasticity, superior flexibility, and corrosion resistance |
| Zero Backlash | No rotary clearance – ideal for precision positioning and reversing applications |
| Compensates Radial, Angular & Axial Deviations | Handles misalignment while maintaining constant velocity |
| Identical CW/CCW Characteristics | Consistent performance in both clockwise and counterclockwise rotation |
| H7 Precision Bore | High concentricity, accurate shaft fit, and powerful locking |
| 12.9-Grade Screws | High-strength locking for secure torque transmission |
| Keyway-Type Mounting | Reliable shaft connection with standard keyway |
| Up to 10000 rpm | Suitable for high-speed spindle and motor applications |
| IP65 Protection | Dust-tight and water-jet resistant |
| ISO Certified | Quality assurance and international interchangeability |
| Factory Direct | Competitive pricing and stable supply from China |
Technical Specifications
| Parameter | Details |
|---|---|
| Product Name | DR Economical Bellows Coupling |
| Brand | Apexcoupling |
| Type | Bellows Coupling |
| Standard | ISO |
| Material | Aluminium Alloy |
| Bellows Material | Stainless Steel |
| Wheel Body Material | Aluminium Bronze |
| Hub Material | Aluminium Alloy |
| Elastic Element | Polyurethane |
| Rated Torque | 1000 N·m |
| Max Speed | 10000 rpm |
| Bore Diameter | 3 mm |
| Inner Diameter | 50 mm |
| Diameter | 105 mm |
| Compensation Type | Radial |
| Axial Deviation Compensation | 1 mm |
| Surface Treatment | Zinc Plating |
| Installation Method | Keyway Type |
| Protection Level | IP65 |
| Maintenance Interval | 1000 hours |
| Overload Protection | Not Supported |
| Certification | ISO |
| Place of Origin | Dongguan, Guangdong, China |
Product Details
01. High-Elasticity Stainless Steel Bellows
The stainless steel bellows elastic element provides superior flexibility, compensating for radial, angular, and axial misalignments while maintaining constant velocity.
02. Zero Backlash & Identical CW/CCW Characteristics
The one-piece bellows design eliminates rotary clearance and ensures identical performance in both clockwise and counterclockwise rotation – ideal for precision positioning and reversing applications.
03. H7 Precision Bore
The bore tolerance is controlled within H7 precision, ensuring high concentricity, accurate shaft fit, and powerful locking.
04. 12.9-Grade Screws
High-strength 12.9-grade screws provide secure locking and reliable torque transmission.
05. Aluminium Alloy Hubs with Zinc Plating
Lightweight and corrosion-resistant aluminium alloy hubs with zinc plating for extended service life.
06. Keyway-Type Mounting
Standard keyway connection ensures secure shaft engagement and reliable torque transfer.
Customization Options
Apexcoupling offers extensive customization for bellows couplings:
Custom bore diameters and lengths
Keyway, hexagon, square, and spline bores
Alternative materials: aluminium alloy, stainless steel
Surface treatments: zinc plating, anodic oxidation, nickel plating, polishing
Custom bellows length and stiffness
Drawing-based production
OEM / ODM / OBM with your branding
📧 Send your drawing or requirements to: ella@apexcoupling.com
Applications
The DR economical bellows coupling is widely used in:
CNC Machine Tools – Lathes, milling machines, drilling machines, and machining centers
Stepper Motors – Precision motion control and positioning systems
Ball Screws – Smooth, reaction-free linear motion
Encoders – Precise motion feedback and positioning
Food Packaging Machinery – High-speed packaging and filling lines
Metallurgical Equipment – Heavy-duty industrial drives
Photovoltaic Power Generation – Solar tracking and positioning systems
Woodworking Machinery – Routers, saws, and edge banding machines
Chemical Industry – Corrosion-resistant bellows for harsh environments
Semiconductor Equipment – Wafer handling and precision stages
Food Machinery – Hygienic and reliable power transmission
Printing Machinery – Registration and tension control systems
Railway Track Equipment – Durable and stable coupling solutions
Why Choose Apexcoupling?
🏭 Factory Direct in Dongguan, China – Integrated manufacturing and trading, competitive pricing
🔩 Premium Aluminium Alloy & Stainless Steel Bellows – Lightweight, corrosion-resistant, and durable
⚙️ Zero Backlash & Constant Velocity – Precise transmission even under misalignment
📐 H7 Precision Bore & 12.9-Grade Screws – High concentricity and powerful locking
🔧 Keyway-Type Mounting – Secure shaft connection and reliable torque transfer
🧾 Economical Alternative to Imported Brands – High quality 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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| Model | Outer Diameter (mm) | Length (mm) | Bore Range (mm) | Fixing Type |
|---|---|---|---|---|
| DR | 16 | 27 | 3–6 | Screw fixed type |
| DR | 20 | 32 | 4–10 | Screw fixed type |
| DR | 25 | 37 | 5–12 | Screw fixed type |
| DR | 32 | 42 | 6–16 | Screw fixed type |
| DR | 40 | 51 | 8–19 | Screw fixed type |
| DR | 55 | 57 | 12–19 | Screw fixed type |
| DR | 65 | 81 | 19–30 | Screw fixed type |
| DR | 82 | 103 | 25–40 | Screw fixed type |
| DRCG | 105 | 130 | 30–50 | Screw fixed type |
| DRC | 16 | 27 | 3–6 | Clamping type |
| DRC | 20 | 32 | 4–10 | Clamping type |
| DRC | 25 | 37 | 5–12 | Clamping type |
| DRC | 32 | 42 | 6–16 | Clamping type |
| DRC | 40 | 55 | 8–19 | Clamping type |
| DRC | 55 | 72 | 12–19 | Clamping type |
| DRC | 65 | 81 | 19–30 | Clamping type |
| DRC | 82 | 103 | 25–40 | Clamping type |
| DRC | 105 | 130 | 30–50 | Clamping type |
Note: For more specifications and sizes, please contact customer service.
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DR bellows coupling
