Product Overview

The DFC Aluminum Spider Coupling (also known as jaw or star coupling) is a precision flexible coupling designed for servo motor and lead screw applications. Featuring a high-strength aluminum alloy hub with a German imported polyurethane spider insert, this coupling delivers zero backlash, excellent vibration damping, and reliable torque transmission. The anodized surface finish provides superior corrosion resistance and extended service life.

Key Features

• German Imported Polyurethane Insert – High wear resistance, oil resistance, electrical insulation, operating temperature up to 140°C

• Zero Backlash – Suitable for forward/reverse operation with no lost motion

• High-Strength Aluminum Alloy – Lightweight yet durable, anodized for corrosion protection

• H6 Bore Accuracy – Precision fit for high concentricity (higher than H7)

• 12.9 Grade Screws – High-strength fasteners for secure clamping

• Vibration Damping – Elastic spider absorbs shocks and reduces noise

• Misalignment Compensation – Accommodates radial, angular, and axial deviations

• Split Design – Easy installation and maintenance

• 3D Chamfered Edges – Safe handling, no sharp corners (for OD ≥ 25 mm)

• 5-Axis Machining – High concentricity and surface finish

Technical Specifications

Standard Models (Examples)

Full size range available. Custom bores, keyways, and lengths available upon request.

Spider Insert Options (Color Code)

Different spider hardness/colors available for various torque and damping requirements:

German imported polyurethane standard. Custom materials available.

Design & Operating Principle

The DFC spider coupling consists of:

• Two aluminum hubs (clamp style)

• One polyurethane spider insert

How it works:
The curved jaws of the aluminum hubs engage with the spider insert. Torque is transmitted through compression of the polyurethane legs, which also absorb misalignment and vibration. The split clamp design allows easy assembly without moving connected equipment.

Key advantages of the spider coupling design:

• Zero backlash (with preloaded or precision spider)

• Excellent vibration damping

• Electrical isolation (polyurethane is insulating)

• Maintenance-free (spider can be replaced without removing hubs)

Applications

• Servo motor to lead screw connections

• Stepper motor drives

• CNC machine tools (axis drives)

• Robotics and automation

• Precision positioning tables

• Printing and packaging machinery

• Medical equipment

• Textile machinery

• Semiconductor manufacturing

Why Choose Apexcoupling DFC Series

• German imported polyurethane – Superior durability and temperature resistance (140°C)

• H6 bore accuracy – Tighter than standard H7 for precision applications

• Anodized surface – 30% longer service life compared to untreated aluminum

• 5-axis CNC machining – High concentricity and smooth finish

• 3D chamfering (OD ≥ 25 mm) – Safe handling, no sharp edges

• Extensive inventory – Standard sizes in stock

• Full customization – Non-standard bores, lengths, and materials available

Customization Services

As a factory-direct manufacturer, we offer:

• Custom bore diameters (including metric and inch)

• Keyways, set screw holes, or other locking methods

• Special lengths and outer diameters

• Stainless steel hubs (for corrosive environments)

• Different spider materials (temperature or chemical resistant)

Contact us with your requirements.

Related Products

• DST Series – Single diaphragm stepped clamp coupling (aluminum, zero backlash)

• DBL41 Series – Double diaphragm keyless coupling (high torque, 420 N·m)

• DD Series – Flexible spring coupling for encoders

• DNCG Series – Stainless steel rigid coupling

• AL-S Z2 / EL-S – Keyless locking devices

• aluminum spider coupling

• jaw coupling zero backlash

• servo motor coupling high torque

• DFC coupling

• star coupling elastic

• polyurethane coupling insert

• lead screw coupling

• anodized aluminum coupling