Industrial Gearbox Manufacturer | Custom Cast Iron/Steel Gearboxes for Mining & Wind Energy

What is a Gearbox?

A gearbox (also called gear case or transmission case) is a sealed mechanical assembly transferring power via gears, widely used in mining, wind turbines, and heavy machinery. Our foundry-to-finish manufacturing ensures low noise, high efficiency, and 20,000+ hour service life.

Key Synonyms:

• Gear Case

• Transmission Case

• Power Drive Unit

Technical Specifications of Our Industrial Gearboxes

Materials & Casting Process

• Cast Iron Gearboxes:

• EN-GJL-250 (Hardness HB190-220 | Tensile Strength ≥250MPa)

• ASTM A536 65-45-12 Ductile Iron (Impact Resistance ≥15J)

• Casting Methods:

• Sand Casting ±1.5mm Tolerance → CNC Machining (IT7 Accuracy)

• Surface Finish: Phosphating (Anti-Corrosion) / Dacro-coating (Aesthetic)

Performance & Certifications

• Load Capacity: Up to 50,000 Nm Torque (Tested per ISO 6336)

• Protection Class: IP67 (Dust/Waterproof) & IP69K (High-Pressure Wash)

• Certifications: ISO 9001, PED 2014/68/EU, GL Wind

Why Choose Our Gearboxes?

✅ Full Vertical Integration

• In-House Smelting: 230m³ Blast Furnace → Low-Sulfur (≤0.02%) Molten Iron

• Casting & Machining:

• 5 Casting Workshops (Lost Foam/Resin Sand)

• 30-Ton CNC Vertical Lathe → Process Ø3m Gear Case Flanges

✅ Customization for Extreme Conditions

• Mining Gearboxes: Reinforced Housing for Shock Loads (20,000+ Units Supplied)

• Wind Turbine Gearboxes: -40°C Low-Temp Impact Certification (GL Standard)

• OEM Adaptability: Modify PCD, Shaft Diameter (Ø50-Ø500mm), & Sealing Types

✅ Fast Global Delivery

• 15 Days Standard Lead Time

• 72-Hour Emergency Shipment via DHL/FedEx

Applications & Case Studies

• Wind Energy: Supplied 800+ Gear Cases for 4MW Offshore Turbines (European OEM)

• Cement Plants: Custom Gearboxes for Rotary Kiln Drives (10-Year Service Contract)

• Mining Conveyors: 5,000+ EN-GJL-250 Gearboxes for Belt Drive Systems

Certified Quality Control

• Material Testing: Spectrometer Analysis & Charpy Impact Test

• Dimensional Inspection: CMM (±0.02mm) & Laser Scanning

• Leak Test: Helium Mass Spectrometry (≤1×10⁻⁶ mbar·L/s)

Gearbox vs. Gear Motor: Key Differences

While gearboxes focus on torque/speed conversion, gear motors integrate motors. We provide both solutions – Contact U for system optimization.

Request a Free Gearbox Quote

🔧 Limited Offer:

• Free 3D STEP File with Inquiry

• 5% Discount on First Order Over $30,000

📩 Contact Our Gearbox Experts:

• Email: zbw@tiegu.net

• Upload Drawings: Get Instant Quote