Changzhou Tiangong Forging Co., Ltd.
| Payment Terms | T/T |
| Supply Ability | 56000 Tons per year |
| Delivery Time | 30days |
| Packaging Details | Pallet |
| Application | Wind turbines |
| Quality Control | Ultrasonic tested (UT) & Mechanical Properties |
| Material | Customized |
| Production Process | Forging |
| Hardness | Customized according to customer requirements |
| Surface Finish | Smooth |
| Heat Treatment | Annealing and tempering |
| Size | Customized according to drawings |
| Brand Name | Tiangong |
| Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China |
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Product Specification
| Payment Terms | T/T | Supply Ability | 56000 Tons per year |
| Delivery Time | 30days | Packaging Details | Pallet |
| Application | Wind turbines | Quality Control | Ultrasonic tested (UT) & Mechanical Properties |
| Material | Customized | Production Process | Forging |
| Hardness | Customized according to customer requirements | Surface Finish | Smooth |
| Heat Treatment | Annealing and tempering | Size | Customized according to drawings |
| Brand Name | Tiangong | Certification | ISO9001, ISO14001,ISO45001 |
| Place of Origin | Changzhou, China | ||
| High Light | customized forging blank ，spline shaft low speed ，customized spline shaft | ||
Steel Forging Blank Spline Shaft Low Speed Shaft High Speed Shaft Spindle. Our steel forging blanks are the robust starting materials for critical rotating components: spline shafts, low-speed shafts, high-speed shafts, and spindles. Precision-forged, these blanks achieve superior internal grain structure and enhanced mechanical properties. This ensures the final machined parts offer exceptional strength, durability, and fatigue resistance for reliable power transmission and precise rotational control in demanding industrial uses.
These steel forging blanks are essential precursors for key shafts and spindles across many industries:
| Item | Details |
|---|---|
| Product Name | Steel Forging Blank Spline Shaft Low Speed Shaft High Speed Shaft Spindle |
| Material Grades | - High-strength alloy steel: 42CrMo / 42CrMo4 / AISI 4140 - Excellent hardenability, toughness, and fatigue resistance - Engineered for long service life in high-torque, high-cycle applications |
| Forging Equipment | - Hydraulic hammers: 5T / 8T / 12T, large open-die forging press - Designed for large-diameter, long-length shafts - Ensures axial fiber orientation and internal structural integrity |
| Manufacturing Process | Hot Forging → Heat Treatment → Rough or Semi-Finish Machining → Straightness Correction → Dimensional & UT Inspection |
| Forging Ratio | ≥ 3.0 — Promotes grain refinement and axial strength, critical for wind turbine load cycles |
| Applications | - Wind turbine main shafts, generator shafts, and pitch/yaw drive shafts - Suitable for 1MW–6MW wind turbine systems - Withstands torsional stress, variable wind load, and start-stop fatigue |
| Heat Treatment Options | - Normalizing and tempering for high tensile strength and core toughness - Optional pre-machining stress relief |
| Testing & Inspection | - Chemical: Spectrometer-controlled alloy composition - Mechanical: Hardness, tensile, yield, impact - Ultrasonic: Full-length UT - Dimensional: Shaft length, straightness, concentricity, machining allowance verification |
| Value-Added Services | - Custom diameter & length - Pre-machining - Protective painting, rust-prevention coating - Export packaging with wood crating, steel banding, and shaft end protection |
The steel forgings production flow:
raw material inspection → unloading → inspection → preheating → forging → heat treatment → inspection → rough machining → non-destructive testing → inspection → packaging → delivery.
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.
Company Details
Business Type:
Manufacturer,Exporter,Seller
Year Established:
1994
Total Annual:
27.5 million -28 million
Employee Number:
135~150
Ecer Certification：
Verified Supplier
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 ... 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 ...
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