42CrMo, 18CrNiMo7-6, or 20CrMnTi High-Speed Transmission Shaft Free Forging

42CrMo, 18CrNiMo7-6, or 20CrMnTi High-Speed Transmission Shaft Free Forging. High-Speed Transmission Shaft Free Forging for Precision Powertrain and Drive Systems.The High-Speed Transmission Shaft Free Forging is a precision-engineered forged component designed for high-RPM powertrain and drive systems. Manufactured from premium alloy steels such as 42CrMo, 18CrNiMo7-6, or 20CrMnTi, this shaft forging delivers excellent rotational balance, surface hardness, and torsional strength under continuous high-speed loading conditions.

Engineered for superior fatigue resistance, dimensional stability, and minimal vibration, these forgings are ideal for use in turbo gearboxes, electric motor drive assemblies, rail transmission systems, and high-speed mechanical couplings. The directional grain flow achieved through open-die forging enhances mechanical integrity and operational life in critical transmission environments.

This product supports various post-forging services including spline machining, keyway broaching, stress-relief heat treatment, and precision grinding, ensuring full compatibility with OEM powertrain designs and performance standards.

Key features:

• High fatigue resistance and torsional strength to withstand rapid cyclic loads

• Superior dimensional stability and concentricity for high-speed rotation

• Optimized grain flow for durability and long service life

• Optional carburizing capability for hardened surfaces (especially with 18CrNiMo7-6, 20CrMnTi)

Available types include:

• Spline shafts for gear couplings and reducers

• Stepped shafts for speed-changing mechanisms

• Hollow or solid transmission shafts for rail and industrial drives

• Custom shafts with integrated shoulders, keyways, and journal seats

The steel forgings production flow:

Raw material steel ingot into warehouse(test the chemical composition) → Cutting→ Heating(Furnace temperature test) → Heat treatment after forging(Furnace temperature test) Discharge the furnace(blank inspection)→ Machining→ Inspection(UT,MT,Visal dimension, hardness)→ QT→ Inspection(UT, mechanical properties, hardness, grain size)→ Finish machining→ Inspection (dimension)→ Packing and Marking(steel stamp, mark)→ Storage Shipment.

Packaging & Delivery
Rust-preventive coating

Heavy-duty seaworthy wooden boxes

Custom labeling and barcoding

Global shipping support with flexible delivery terms (FOB, CIF, EXW)

Frequently Asked Questions (FAQs)
1. What is your forging weight range?
We produce forged parts ranging from 100 kg to 7000 kg.

2. Do you provide heat treatment and machining?
Yes, we offer full in-house heat treatment, rough, and finish machining services.

3. Which industries do you supply to?
We serve wind energy, heavy equipment, port machinery, transmission systems, and more.

4. What is your production lead time?

With stock: Around 30 days

Without stock: 40–45 days

5. Where is your factory located?
In Changzhou City, near Shanghai, with shipping via Shanghai Port.

Request a Quote
Please send your technical drawings and requirements to us. Our engineers will review and provide you with a professional quotation and solution shortly.

About CHANGZHOU TIANGONG 

We are a Chinese company with over 30 years of forging experience. Our focus lies in the production of machine free forged products. We take pride in our independent quality assurance laboratory, which ensures that all our products meet our customers’ requirements. 

Our customers and partner value our products and services for 2 reasons: excellence and reliability.

Key figures 

A. Over 30 years professional free forging manufacturing experience

B. The company covers an area of 71,000 square meters

C. The construction area of the production workshop is 12,000 square meters

D. Total number of employees of 158

E. 28 engineering and technical personnel 

F. 59 skilled workers 

G. Annual production capacity is 38,000 tons

H. Steel throughput can reach 56,000 tons

Efficient and reliable solutions for customers

Industrial sector application

We design and manufacture forged parts for all industrial areas applying our experience and unique professionalism and taking the specific requirements of the markets into account. This has led us to become a forging industry leader in all industrial segments and collaborating with leading companies.

A. Wind power generation

B. Port Heavy Machinery

C. Mining

D. Ship Building

E. Chemical industrial

F. Oil industrial

G. Metallurgical industry 

H. Hydraulic industry 

I. Other high-end industrial equipment, gearbox body, parts and etc.

Customized solutions 

Modular processes allow us to engineer a solution for almost every industrial application requiring free forged parts. Our modularity means flexibility, a wide range of options, faster delivery, and most important of all, competitiveness.

All our products and production process have been designed to assure excellent, reliable and long lasting unique mechanical performances, resulting in reduced operating costs and long life.

With a wide range of products and a significant experience gained in most industrial applications, we can also provide complete engineering recommendation for customers.