3/8″ Universal Joint Coupling – Single or Double Joint, Machine Tool Accessory, Hand Socket Adapter

Factory direct | 42CrMo alloy steel | 45° operating angle | Custom bores: keyway, hexagon, square | OEM/ODM/OBM

The Apexcoupling 3/8″ Universal Joint Coupling is a precision flexible coupling designed for machine tool accessories and hand socket applications. Available in single or double joint configurations, and constructed from 42CrMo alloy steel with polishing or black oxide surface treatment, this coupling delivers reliable torque transmission at angles up to 45°. It is the ideal solution for reaching fasteners in tight or obstructed spaces in construction machinery, food machinery, printing machinery, and packing machinery.

✅ Custom bores available: keyway, square hole, hexagon hole, plain hole.

Key Technical Specifications

🔧 Custom inner hole diameters, lengths, and bore types available. Contact us with your specifications.

Product Configurations

💡 Double joint configurations provide smoother power transmission when both angular misalignment and parallel offset are present.

Product Features & Advantages

Product Structure

1. Drive End – 3/8″ square drive for attachment to ratchets, wrenches, or power tools.

2. Universal Joint Mechanism – Pivot joint allowing angular movement up to 45°.

3. Output End – Accepts sockets or other tool attachments.

4. Single Joint – One pivot point for angular flexibility.

5. Double Joint – Two pivot points for angular + offset flexibility.

Applications

• Machine Tools – CNC machines, milling machines, lathes

• Hand Tools – Socket wrenches, ratchets, manual drivers

• Construction Equipment – Heavy machinery maintenance and assembly

• Food Machinery – Processing and packaging equipment

• Printing Machinery – Presses and finishing equipment

• Packing Machinery – Conveyors and wrapping machines

• Manufacturing Plants – General assembly and maintenance

• Machinery Repair Shops – Replacement and upgrade parts

• Automotive Maintenance – Reaching fasteners in tight engine bays

• Industrial Maintenance – Hard-to-reach nuts and bolts

Why Choose Apex Coupling for 3/8″ Universal Joints?

FAQ

Q: What is a 3/8″ universal joint coupling?
A: It is a flexible coupling that connects a drive tool (ratchet, wrench, or power tool) to a socket or other tool attachment, allowing operation at angles up to 45° to reach fasteners in tight or obstructed spaces.

Q: What is the difference between single and double joint?
A: Single joint provides angular flexibility only (up to 45°). Double joint provides both angular flexibility and parallel offset capability, allowing access to fasteners that are both angled and offset from the drive tool.

Q: What is the maximum operating angle?
A: The maximum operating angle is 45°. For continuous operation, we recommend keeping the angle below the maximum to extend service life.

Q: What materials are available?
A: Standard material is 42CrMo alloy steel – high strength, toughness, and fatigue resistance. Other materials available on request.

Q: What surface finishes are available?
A: We offer polishing (smooth, bright finish) and black oxide (blackening for corrosion resistance).

Q: What bore types can I get?
A: We offer keyway, square hole, hexagon hole, and plain hole – in addition to standard round bores. Custom bores accepted.

Q: What is the inner hole diameter range?
A: Standard range is 10 – 42 mm. Custom sizes available on request.

Q: Is this coupling suitable for power tools?
A: Yes. The 42CrMo construction and precision machining make it suitable for both manual and power tool applications.

Request a Quote

Send us your required configuration (single/double), inner hole diameter, outer diameter, length, bore type, and surface finish. Our engineers will recommend the optimal model and provide a quotation within 24 hours.