This free-forged alloy shaft is specifically designed for industrial gearbox drive systems, delivering exceptional strength, torsional rigidity, and long-term reliability under high-load and continuous operation conditions. Manufactured through precision-controlled free forging, the shaft exhibits a refined internal grain structure and uniform metallurgical integrity, ensuring superior fatigue resistance, impact toughness, and dimensional stability for critical transmission applications.
Product Features
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High Mechanical Strength – Free forging ensures dense, defect-free internal structure capable of withstanding heavy torque and cyclic loads.
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Excellent Fatigue and Shock Resistance – Optimized forging and heat treatment deliver reliable performance under repeated start-stop and load variations.
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Dimensional Accuracy – Designed for precision machining, maintaining tight tolerances for gear mounting, keyways, and bearing interfaces.
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Material Versatility – Available in alloy steels such as 42CrMo4, 30CrNiMo8, and 18CrNiMo7-6, selected for high torsional strength and wear resistance.
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Corrosion and Wear Resistance – Optional surface treatments or coatings enhance durability in demanding industrial environments.
Application Fields
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Industrial gearbox drive shafts for heavy machinery and material handling equipment
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Transmission components in mining, steel, and construction equipment
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Power transmission systems requiring high torque, precision, and long service life
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Offshore or marine gearbox assemblies with cyclic load demands
This shaft is ideal for industries and applications where precision, reliability, and mechanical integrity are critical for continuous high-load operations.
| Item |
Details (Differentiated for Free Forging Alloy Shaft) |
| Product Name |
Free Forging Alloy Shaft for Industrial Gearbox Transmission Drive System Components |
| Material Grades |
- Alloy steels such as 42CrMo4, 20CrMo, 18CrNiMo7-6 — selected for high torsional strength, fatigue resistance, and wear resistance- Materials optimized for high-load gearbox transmission and continuous industrial operation |
| Forging Equipment |
- Hydraulic hammers: 5T / 8T / 12T — suitable for forging medium to long shafts- Open-die forging presses up to 3600T — ensures dense, uniform internal grain flow and defect-free structure- Specialized shaft tooling for precise keyway, bearing seat, and end face formation |
| Manufacturing Process |
Steel billet cutting → Controlled heating → Free forging → Heat Treatment (Quenching + Tempering) → Intermediate inspection → Rough machining of bearing seats, keyways, and shaft ends → Non-destructive testing (UT, MT) → Finish machining → Final dimensional inspection → Protective packaging |
| Forging Ratio |
≥ 3.5 — Promotes uniform fiber alignment, excellent fatigue performance, and torsional strength under cyclic gearbox loads |
| Applications |
- Drive shafts for industrial gearboxes in heavy machinery and material handling equipment- Transmission shafts in mining, steel, and construction equipment- Powertrain components requiring high torque and dimensional accuracy- Offshore and industrial gear assemblies operating under high-load conditions |
| Heat Treatment Options |
- Quenched + Tempered — Ensures high core strength and surface toughness- Optional induction hardening for critical load areas- Stress relief to reduce residual stresses and enhance dimensional stability |
| Testing & Inspection |
- Chemical: Spectrometer analysis for alloy verification- Mechanical: Tensile, yield, hardness, and impact toughness tests- NDT: Ultrasonic Testing (UT), Magnetic Particle Testing (MT)- Dimensional: Bearing seat diameters, shaft straightness, keyway dimensions, and end-face flatness |
| Value-Added Services |
- Precision machining of keyways, bearing seats, splines, and shaft ends- Surface finishing such as shot blasting or anti-corrosion coating- Export-quality packaging for overseas shipment- Full traceability with heat numbers, batch numbers, and certified mechanical & NDT reports |
Steel Forging Production Flow
Steel ingots are first inspected for chemical composition and carefully stored → Cut to the required dimensions → Heated in a controlled furnace with continuous temperature monitoring → Forging performed with precise control, followed by heat treatment ensuring uniform mechanical properties → Discharge from the furnace and preliminary blank inspection → Rough machining to prepare for further processing → In-process quality checks including ultrasonic testing (UT), magnetic particle testing (MT), dimensional verification, and hardness measurement → Normal and tempering (QT) → Post-heat-treatment inspection covering UT, mechanical properties, hardness, and grain structure → Precision finish machining to achieve final dimensions → Comprehensive final inspection → Part marking, labeling, and protective packaging → Stored safely until shipment to the customer.
Frequently Asked Questions (FAQs) – Differentiated Version
1. What is your forging capacity?
We produce forged components ranging from 100 kg to 7,000 kg, covering both medium-sized machinery and heavy-duty industrial applications.
2. Do you provide heat treatment and machining?
Yes. Our facility offers full in-house heat treatment, along with rough and precision CNC machining, ensuring every part meets exact customer requirements.
3. Which industries use your products?
Our forgings are widely applied in wind energy, heavy industrial machinery, port handling equipment, transmission systems, and other high-demand industrial sectors.
4. What are your typical lead times?
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Stock items: approximately 30 days
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Custom-made components: typically 40–45 days, depending on size, material, and complexity
5. Where is your manufacturing facility located?
Our plant is located in Changzhou, Jiangsu Province, near Shanghai, allowing efficient logistics and smooth export via Shanghai Port.
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