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DFC Series Aluminum Alloy Curved Jaw Clamp Coupling | Zero-Backlash Servo & Stepper Motor Shaft Coupling
Model Number
Check below, custom
DFC-20×25
DFC-20×30
DFC-25×34
DFC-30×35
DFC-40×55
DFC-40×66
DFC-55×78
DFC-65×90
- Phone : +86 13431039760
- Wechat : +86 13431039760
- Whatsapp : +86 13431039760
- Email : ella@apexcoupling.com
Product Description
[Header: Precision Zero-Backlash Control: DFC Series Aluminum Alloy Curved Jaw Clamp Coupling]
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The Apexcoupling DFC Series Aluminum Alloy Curved Jaw Clamp Coupling is engineered specifically for precision motion control applications powered by servo motors, stepper motors, and CNC drive units. Machined from high-strength aviation-grade aluminum alloy on 5-axis CNC equipment and finished with an anodized surface treatment, this clamp-style coupling offers exceptional concentricity, high thermal stability, and low rotational inertia.
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Featuring imported heat-resistant polyurethane spider inserts capable of withstanding operating temperatures up to 140°C (standard range -35°C to +80°C), the DFC series delivers true zero rotational clearance (zero backlash) during rapid forward and reverse positioning cycles. The clamping screw hub design utilizes Grade 12.9 high-tensile fasteners to provide non-marring, slip-free shaft engagement while accommodating radial, angular, and axial shaft misalignments.
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[Core Product Advantages / Unique Selling Points]
Zero Rotational Backlash: Curved jaw profile pre-loads the elastomer insert, ensuring backlash-free bidirectional torque transmission for servo and stepper motor positioning.
5-Axis CNC Precision Machining: Hubs are processed in a single setup on 5-axis machine tools, guaranteeing strict H6 bore tolerance and exceptional concentricity.
High-Grade Aviation Aluminum Alloy: Light weight and low moment of inertia allow rapid acceleration/deceleration while reducing motor shaft load.
Anodized Surface Treatment: Anodized finish protects against oxidation, corrosion, and wear, extending operational service life by up to 30%.
Imported Heat-Resistant Polyurethane Spider: Provides vibration damping, electrical insulation, and oil/chemical resistance, withstanding peak working temperatures up to 140°C.
3D Chamfered Safety Design: Outer diameters of 25 mm and above feature smooth 3D chamfered edges to eliminate sharp burrs and protect technician safety during installation.
Non-Damaging Clamping Collar Fastening: Heavy-duty Grade 12.9 socket head cap screws clamp securely around the shaft without scoring or damaging motor shafts.
Direct Factory Sourcing & Custom Bores: Wide stock selection of standard sizes (D20 to D65) with full customization support for mismatched bore diameters (D1≠D2) and OEM/ODM projects.
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[Technical Specifications Table]
| Attribute | Specification Details (As Detailed in Provided Info & Table Image image_eae440.png) |
| Product Series / Model | DFC Series (DFC-20×25 to DFC-65×90) |
| Coupling Structure Type | Curved Jaw Clamp Coupling (Detachable 3-Piece Design) |
| Hub Material | High-Strength Aviation Aluminum Alloy |
| Surface Finish | Anodized Surface Treatment |
| Elastomer Spider Material | Imported Polyurethane (Heat resistant up to 140°C) |
| Bore Machining Precision | H6 Inner Bore Accuracy |
| Clamping Fasteners | Grade 12.9 High-Strength Socket Screws (M3 to M8) |
| Outer Diameters ($\Phi D$) | 20 mm, 25 mm, 30 mm, 40 mm, 55 mm, 65 mm |
| Overall Lengths ($L$) | 25 mm, 30 mm, 34 mm, 35 mm, 55 mm, 66 mm, 78 mm, 90 mm |
| Available Shaft Diameter Range | 4 mm to 38 mm (Mix-and-match $D_1 / D_2$ bores available) |
| Operating Temperature | Standard -35°C to +80°C (Spider heat resistant to 140°C) |
| Target Application | Servo motors, stepper motors, CNC machine tools, automation positioning stages |
DFC clamp jaw coupling, aluminum curved jaw coupling, zero backlash servo coupling, stepper motor jaw coupling, anodized aluminum flexible coupling, H6 precision clamp shaft coupling, polyurethane spider coupling.
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DFC clamp jaw coupling
