Double Universal Joint Coupling | Precision 42CrMo Steel

Product Overview

The Apex Coupling Double Universal Joint Coupling is designed for mechanical power transmission applications that require angular movement between connected shafts. Its precision joint structure supports flexible shaft arrangement in industrial machinery, motor-driven equipment and specialized transmission systems.

Manufactured from 42CrMo alloy steel according to the supplied product specification, this precision universal joint series features a pin-and-block joint structure, H7 finished bore options and keyway or set-screw mounting configurations. Multiple sizes are available to accommodate different shaft diameters and installation lengths.

The series includes single and double universal joint configurations. The appropriate configuration should be selected according to the required working angle, shaft geometry, torque, speed and installation space.

OEM and ODM support is available for selected bore configurations, shaft lengths and non-standard mounting requirements.

Key Features

• 42CrMo alloy steel: Specified for the listed product configuration; confirm material documentation for the ordered model.

• Precision joint structure: Designed for controlled joint movement and reduced clearance.

• Pin-and-block construction: Joint structure identified in the supplied product specifications.

• H7 finished bore: Available for specified configurations.

• Flexible mounting options: Keyway or set-screw connections, depending on the selected model.

• Multiple sizes: A range of bore diameters and overall lengths is available.

• Single and double configurations: Select the structure to suit the required shaft arrangement.

• OEM/ODM customization: Special lengths, bore shapes and mounting interfaces can be discussed according to drawings.

Technical Specifications

Technical note: The supplied specification lists a 90° operating angle, torque from 11.2 to 1,120 N·m and a length range of 60–244 mm. These values should not be assumed to apply to every size or configuration. Confirm the allowable angle, torque, speed, dimensional definitions and operating limits for the exact model before ordering.

Available Models

The following model numbers were provided for this product series. Confirm the overall length and bore dimensions against the manufacturer’s technical drawing before purchase.

The listed model numbers include two length options for each nominal size. The model code appears to identify the nominal size, overall length and two bore dimensions; please verify the manufacturer’s official drawing for the exact coding convention.

How Does a Double Universal Joint Coupling Work?

A universal joint transmits torque between connected shafts whose centerlines operate at an angle. A double universal joint arrangement uses two joint sections connected through an intermediate member.

Depending on the geometry and phasing, a correctly designed double-joint arrangement can help reduce the output-speed variation associated with a single Cardan joint. This benefit depends on the working angles and arrangement of the joints; it should not be assumed for every configuration.

The joint’s allowable angle, torque capacity and speed limit depend on its design and dimensions. Correct alignment, installation and maintenance are important for reliable operation.

Typical Applications

This precision double universal joint coupling may be considered for:

• Motor-driven mechanical transmission systems

• Industrial automation equipment

• Packaging and processing machinery

• Textile machinery

• General industrial equipment

• Specialized machinery requiring angular shaft transmission

The final application suitability should be verified against the selected model’s rated torque, operating speed, joint angle and mounting dimensions.

How to Choose the Right Double Universal Joint Coupling

1. Confirm the Shaft Diameters

Measure both connected shaft diameters and determine whether the two ends require equal or different bore sizes. Specify H7 tolerance, keyway, set screw or another mounting configuration where applicable.

2. Check the Overall Length

Confirm the available installation space and the required coupling length. Select the appropriate model from the listed options and verify all dimensions on the technical drawing.

3. Calculate the Required Torque

Consider continuous torque, starting torque, acceleration, reversing loads and possible shock loading. Compare the operating requirements with the rating for the exact model.

4. Determine the Working Angle

Measure the angle between the connected shafts and confirm that it falls within the selected configuration’s allowable range. Do not treat the listed 90° value as a universal continuous operating limit without model-specific confirmation.

5. Confirm Speed and Duty Cycle

Check the required operating speed, duty cycle, vibration and lubrication requirements. Obtain the manufacturer’s rated speed before using the coupling in high-speed equipment.

6. Specify Material and Mounting Details

Confirm the material grade and any required material certification. Provide the bore shape, keyway dimensions, set-screw position and any other mounting details.

OEM and ODM Customization

Apex Coupling accepts inquiries for customized universal joint couplings. Depending on the selected design and technical feasibility, options may include:

• Non-standard overall length

• Different bore diameters at each end

• Keyway or set-screw mounting

• Square, hexagonal or splined bore options

• Special dimensions based on customer drawings

• Material and surface treatment requirements

For an accurate quotation, provide the model number, required quantity, shaft dimensions, torque, operating speed, working angle and technical drawing if available.

Request a Quote

Looking for a double universal joint coupling for your equipment? Contact Apex Coupling to confirm the model, technical specifications and customization options.

Email: ella@apexcoupling.com
WhatsApp: +86 13437856962

Send your shaft dimensions and operating conditions to request product selection support and a quotation.