Changzhou Tiangong Forging Co., Ltd.
Changzhou Tiangong Forging Co., Ltd.
Add to Cart
42CrMo Free Forged Planetary Gear Shaft for Heavy-Duty Transmission Systems. Our 42CrMo free forged planetary gear shafts are designed for high-performance transmission systems operating under heavy loads, high torque, and continuous duty cycles. Manufactured through precision open-die forging and heat treatment, these shafts offer superior strength, toughness, and dimensional stability essential for critical powertrain components.
Key Features:
Material: Made from premium 42CrMo alloy steel, offering high tensile strength, excellent hardenability, and outstanding fatigue resistance.
Forging Process: Open-die free forging ensures directional grain flow, minimizing internal defects and enhancing mechanical performance.
Heat Treatment: Quenched and tempered to achieve optimal hardness, toughness, and wear resistance; stress-relief annealing available for added dimensional control.
Machinability: Rough or semi-finished machining available for gear spline, shaft ends, and bearing interfaces to meet specific design requirements.
Forging Ratio: ≥ 3.0 — critical for high fatigue strength in rotating applications.
Applications:
Planetary gear systems in wind turbine gearboxes
Heavy-duty transmission systems in mining, construction, and industrial equipment
Drive components in off-highway vehicles and metallurgical machinery
| Item | Details |
|---|---|
| Product Name | 42CrMo Free Forged Planetary Gear Shaft for Heavy-Duty Transmission Systems |
| Material Grades | - Alloy steel: 42CrMo - Provides high tensile strength, good hardenability, and excellent fatigue resistance under continuous high-load operation |
| Forging Equipment | - Hydraulic hammers: 5T / 8T / 12T - 3600T open-die forging press for long or stepped shaft forgings - Capable of forming precise shaft profiles including stepped ends, flanges, splines, and keyways |
| Manufacturing Process | Hot Forging → Heat Treatment (Quenching + Tempering / Normalizing) → Ultrasonic Testing → Rough / Semi-Finish Machining → Final Dimensional Inspection |
| Forging Ratio | ≥ 3.0 — Enhances grain flow alignment along shaft axis for increased impact resistance, torsional strength, and long-term durability |
| Applications | - Planetary gear shafts in wind turbine main gearboxes - Drive shafts for mining, construction, and industrial machinery - Transmission shafts in metallurgical and heavy transport systems |
| Heat Treatment Options | - Quenched + Tempered for high strength and fatigue resistance in dynamic torque transmission - Normalizing for improved grain refinement and dimensional control - Optional stress relief to reduce residual stresses before final machining |
| Testing & Inspection | - Chemical: Composition analysis via spectrometer - Mechanical: Tensile strength, yield strength, hardness, and Charpy impact tests (longitudinal & transverse) - Ultrasonic Testing (UT): 100% internal flaw detection - Dimensional: Runout, straightness, diameter tolerance, and surface roughness control |
| Value-Added Services | - Pre-machining of splines, gear ends, keyways, and journals - Surface finish customization and anti-corrosion protection - Export packaging for long-distance shipment - Full material traceability: heat number, batch number, and certified mechanical & NDT reports |
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.