DFC Aluminium Curved Jaw Plum Coupling for CNC Ball Screw

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DFC Series Aluminium Flexible Plum Coupling | Zero Backlash Ball Screw Shaft Coupling

Model Number
Check below, custom

One keyway(lf a keyway needsto be made)
D14-L22 d(min)3-d(max)6
D20-L25 d(min)3-d(max)10
D20-L30 d(min)3-d(max)10
D25-L30 d(min)4-d(max)14
D25-L34 d(min)4-d(max)14
D30-L35 d(min)5-d(max)16
D30-L40 d(min)5-d(max)16
D35-L32 d(min)5-d(max)18
D35-L50 d(min)5-d(max)19
D40-L50 d(min)6-d(max)24
D40-L55 d(min)6-d(max)24
D40-L66 d(min)8-d(max)25
D45-L55 d(min)8-d(max)25
D50-L55 d(min)8-d(max)25

D55-L49 d(min)12-d(max)32
D55-L78 d(min)12-d(max)32
D65-L90 d(min)14-d(max)40
D80-L114 d(min)14-d(max)45

Product Description

DFC Series Aluminium Flexible Curved Jaw Plum Coupling

Precision Zero-Backlash Clamp Type Shaft Coupling for CNC & Ball Screw Drives

The DFC Series Curved Jaw Plum Coupling is specifically designed for high-precision motor drives, CNC machinery, and ball screw feed systems requiring zero rotational clearance. Crafted from high-strength aluminum alloy with durable polyurethane spiders, the DFC coupling effectively compensates for radial, angular, and axial shaft misalignments while delivering exceptional damping, oil resistance, and smooth high-speed performance up to 13,000 RPM.

Key Advantages & Features

Zero Rotational Clearance: Engineered with zero backlash, making it perfectly suited for precise forward and reverse rotation control in servo and stepper motor applications.
High-Strength Aluminum Alloy Body: Main hub constructed from lightweight, premium-grade aluminum alloy for minimal inertia and superior heat dissipation.
Clamping Screw Fastening Method: Features a secure clamp-style hub design for reliable torque transmission and quick, easy installation without damaging the shaft.
Durable Urethane Spider Element: High-abrasion polyurethane star insert provides excelente elasticity and shock absorption while resisting oil, dirt, sand, grease, moisture, solvents, and ozone.
Triple Misalignment Compensation: Efficiently absorbs and compensates for radial, angular, and axial shaft deviations to protect delicate drive components.
Detachable & Maintenance-Free Structure: Modular design allows straightforward assembly and disassembly in tight machinery spaces.

Technical Specifications

Parameter	Specification Details
Coupling Model	DFC Series (Curved Jaw / Plum Coupling)
Bore Diameter Range	2mm – 22mm (0.08″ – 0.87″)
Rated Torque	28 N·m
Maximum Speed	13,000 RPM
Hub Material	High-Strength Aluminum Alloy
Spider Element Material	High-Elasticity Polyurethane (Urethane)
Fixing / Fastening Style	Clamp Type (Screw Clamping)
Structure Feature	Zero Backlash, Detachable, High Speed, Low Inertia
Customization / Service	OEM & Non-Standard Bore / Keyway Customization Supported

Applications & Industries Served

The DFC series flexible plum coupling is the ideal precision component for demanding motion control systems, including:

CNC & Precision Machinery: Ball screw feed shafts, CNC routers, engraving machines, and machine tool spindles.
Motion Control Systems: Servo motors, stepper motors, and encoder connections.
Industrial Automation: Printing equipment, packaging machinery, medical devices, and automated assembly lines.

Custom & OEM/ODM Manufacturing (Non-Standard Solutions)

At ApexCoupling, we provide tailored shaft coupling solutions to meet your exact engineering specifications. Whether you require custom bore combinations, keyways, special clamping arrangements, or high-volume OEM manufacturing, our technical team is equipped to support your project from drawing to production.