Precision Splined Shaft Forgings
Splined shaft forgings are precision components that transfer torque and align motion between mechanical parts. Their grooves or teeth fit accurately with hubs or gears, creating stable and efficient connections. Each spline shaft is formed through closed-die forging, followed by CNC machining and heat treatment to refine the grain structure and enhance strength. These shafts perform reliably in transmissions, hydraulic systems, and heavy machinery where precision and durability are essential.
Manufacturing Process
Material Selection – Alloy and carbon steels such as 42CrMo, 4140, and 20CrMnTi are selected for fatigue and impact strength.
Closed-Die Forging – Heated billets are forged in precision dies, forming a dense and continuous grain flow.
Heat Treatment – Quenching and tempering improve hardness, wear resistance, and toughness.
CNC Machining – Splines, keyways, and threads are machined under tight tolerances for reliable fit in spline shaft coupling or transmission systems.
Inspection & Testing – Each spline shaft forging is inspected with UT, MPI, and dimensional checks according to ISO 9001:2015 standards.
Product Advantages
High Structural Integrity – The forged structure provides uniform metal flow and stable mechanical strength, ensuring smooth torque transfer under load.
Dimensional Precision – CNC machining maintains accurate spline geometry and consistent alignment with mating hubs or gears.
Enhanced Surface Quality – Controlled heat treatment and finishing deliver refined surfaces for efficient assembly and long-term stability.
Reliable Performance – Each spline shaft performs consistently across demanding environments, supporting continuous operation in heavy-duty systems.
Customizable Options – Available in various materials, profiles, and sizes to meet specific engineering or OEM requirements.
Applications
Automotive & Truck Transmissions – Used as transmission spline shafts in gearboxes and axle drives.
Construction & Heavy Machinery – Delivers torque transfer for excavators, cranes, and loaders.
Hydraulic Systems – Ensures precision coupling between pumps and motors.
Industrial Gearboxes – Provides smooth power delivery for high-speed drive systems.
Energy & Marine Equipment – Connects spline gears and couplings in turbines and propulsion systems.
Quality Assurance and Procurement Value
For procurement and engineering teams, spline shaft forgings must meet strict quality, traceability, and delivery standards. At Weforging, every shaft is produced under ISO 9001:2015 and IATF 16949 management systems, ensuring stable properties and precise dimensional control across batches.
Material certificates, ultrasonic and magnetic particle inspection reports, and CMM data are provided with each order for full transparency. Moreover, our team offers DFM consultation, fast sampling, and consistent global delivery—helping OEM buyers minimize risk, reduce lead time, and maintain supply reliability.
Conclusion
Weforging manufactures precision spline shaft forgings through an integrated forging + CNC machining + testing process. Each part meets strict metallurgical and dimensional standards to ensure stable performance and long lifespan.
For OEM projects or custom splined shaft solutions, contact Weforging to discuss specifications and receive a personalized quotation.
