Product Overview

The fixed pin type universal joint from Apex Coupling combines the angular compensation capability of a classic universal joint with the vibration‑damping benefits of an elastomeric element. Made from high‑strength 42CrMo alloy steel, this flexible universal joint coupling is designed for applications where a rigid coupling would cause excessive stress on bearings or where shock loads need to be absorbed. The elastomeric insert (available in various hardness grades) provides a flexible connection between the driving and driven yokes, reducing peak torque spikes and accommodating minor misalignments while maintaining positive torque transmission through the fixed pin design.

Ideal for use with normal electric motors and stepper motors, this universal joint delivers smooth, reliable power transmission across a wide range of speeds – from 0 up to 4000 rpm (custom balancing available for speeds above 1000 rpm). With a rated torque range of 4.5 N·m to 280 N·m and both single and double configurations offered, it is a versatile solution for factory automation, farm equipment, printing shops, construction machinery, and even home use applications.

Key Technical Specifications

Key Features & Benefits

• Fixed Pin Design – Eliminates the need for set screws or clamp hubs; the pin provides a secure, backlash‑free connection to the shaft, ideal for high‑vibration environments.

• Elastomeric Element – Absorbs shock loads and torsional vibrations, protecting connected motors and driven equipment from peak torque spikes.

• 42CrMo Alloy Steel – High tensile strength and fatigue resistance, suitable for continuous industrial duty.

• Flexible Universal Motion – Accommodates angular, parallel, and axial misalignments while still transmitting rated torque.

• Single or Double Configuration – Choose single for angles up to 25°, or double for up to 45° and smoother velocity output.

• Wide Torque Range – From 4.5 N·m (small servo motors) up to 280 N·m (heavy industrial drives).

• Customization Ready – OEM, ODM, OBM support: custom bores, overall lengths, elastomer hardness, and even private labeling.

Typical Applications

• Electric Motors & Stepper Motors – Connect motor shafts to leadscrews, pumps, fans, and conveyors.

• Food & Beverage Production – Hygienic designs available; standard version suits dry packaging lines.

• Printing Shops – High‑speed, variable torque applications in offset and digital printing presses.

• Construction Works & Energy Mining – Rugged duty where shock loads are common.

• Farm & Agricultural Equipment – PTO drives, grain augers, and balers.

• Home Use & Retail – Treadmills, ice makers, commercial mixers – where quiet, smooth power transmission is needed.

• Factory Automation – Pick‑and‑place robots, indexing tables, and assembly lines.

Quality Assurance & Certifications

Every fixed pin universal joint is manufactured under an ISO9001:2015 certified quality management system. Incoming 42CrMo material is verified by chemical spectroscopy; each joint is 100% dimensionally inspected after machining, and the elastomeric insert is hardness‑tested. BV (Bureau Veritas) certification is available for shipments requiring third‑party verification. For high‑speed applications (>1000 rpm), we perform dynamic balancing to ensure smooth operation and extended bearing life.

Why Choose Apex Coupling for Your Flexible Universal Joint Needs?

• Engineering Support – Our team will calculate the required torque margin and misalignment capacity for your specific motor and load.

• Low MOQ & Fast Sampling – Start with just 1 piece; sample orders shipped within 7‑10 days.

• Full Customization – Bore size, overall length, pin material (stainless steel upon request), and elastomer shore hardness (80A, 95A, 64D).

• Global Export Experience – Over 10 years supplying to more than 80 countries.

• Large Stock – Standard sizes ready for immediate dispatch.

Request a Quote

Need a fixed pin flexible universal joint for your motor application? Contact our sales manager Ella today.

📧 Email: ella@apexcoupling.com
🌐 Online inquiry form: www.apexcoupling.com