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A QT400 worm gear (also called a worm wheel) is a precision power transmission component manufactured from QT400 ductile iron. It meshes with a hardened steel worm shaft to provide smooth, high-torque, low-speed motion while achieving significant speed reduction.
QT400 ductile iron combines excellent castability with high strength, wear resistance, and vibration damping, making it an ideal material for industrial worm gears used in heavy-duty transmission systems.
Worm gears are commonly used where high reduction ratios, compact transmission layouts, and smooth operation are required.
Typical applications include:
Industrial gearboxes
Conveyor systems
Lifting equipment
Packaging machinery
Mining equipment
Material handling systems
Food processing machinery
Agricultural equipment
Automation equipment
Valve actuators
A worm gear system consists of two components:
Worm Shaft
Worm Wheel
Working process:
Motor Rotation
↓
Worm Shaft Rotates
↓
Worm Wheel Engages
↓
Speed Reduction
↓
Torque Multiplication
↓
Output Transmission
Because the worm drives the gear through sliding contact, the system provides quiet operation, high reduction ratios, and can offer self-locking capability in certain designs.
| Item | Specification |
|---|---|
| Product Name | Custom QT400 Ductile Iron Worm Gear |
| Material | QT400 Ductile Iron |
| Product Type | Worm Wheel / Worm Gear |
| Manufacturing Process | Sand Casting + Heat Treatment + CNC Machining |
| Gear Type | Helical Worm Wheel |
| Surface Finish | Machined / Shot Blasted / Protective Coating |
| Heat Treatment | Optional |
| OEM / ODM | Available |
| Inspection | Gear Inspection, CMM Measurement, Material Certification |
| Applications | Industrial Gearboxes, Conveyors, Lifting Systems |
QT400 offers an excellent balance of mechanical performance and manufacturing economy.
High tensile strength
Excellent impact resistance
Good wear resistance
Superior vibration damping
Excellent machinability
Stable casting quality
Lower production cost than steel
Suitable for heavy-duty gear applications
The spheroidal graphite structure of ductile iron provides improved toughness and crack resistance compared with gray cast iron, while maintaining good machinability.
Engineering Design
↓
Pattern & Mold Preparation
↓
QT400 Sand Casting
↓
Heat Treatment (Optional)
↓
Shot Blasting
↓
Precision CNC Machining
↓
Gear Tooth Finishing
↓
Inspection
↓
Packaging
Precision machining ensures accurate bore dimensions, keyways, mounting faces, and proper gear tooth geometry.
Available customization includes:
Outside Diameter
Module
Number of Teeth
Bore Diameter
Keyway Design
Hub Configuration
Gear Accuracy Grade
Surface Treatment
MetalKeen manufactures custom worm gears for:
Gear Reducers
Conveyor Drives
Hoisting Equipment
Packaging Machines
Agricultural Machinery
Mining Equipment
Industrial Automation
Steel Processing Equipment
Textile Machinery
Construction Equipment
| QT400 Ductile Iron Worm Gear | Steel Worm Gear |
|---|---|
| Lower manufacturing cost | Higher material cost |
| Excellent vibration damping | Higher rigidity |
| Good wear resistance | Higher load capacity in extreme conditions |
| Excellent castability | More machining required |
| Ideal for most industrial gearboxes | Preferred for very high-load applications |
Each worm gear undergoes comprehensive inspection before shipment.
Inspection includes:
Material Certification
Chemical Composition Verification
Gear Tooth Inspection
Tooth Profile Measurement
Bore & Keyway Inspection
CMM Dimensional Measurement
Surface Finish Inspection
Final Visual Inspection
Material traceability and inspection reports are available upon request.
A QT400 worm gear is a worm wheel manufactured from ductile iron that transmits motion with a worm shaft to achieve high torque and speed reduction.
QT400 provides higher strength, better toughness, improved fatigue resistance, and greater resistance to cracking while retaining excellent machinability.
Yes. We manufacture custom worm gears according to customer drawings, CAD models, or technical specifications, including casting, CNC machining, heat treatment, and gear inspection.
Worm gears are widely used in industrial gearboxes, conveyors, lifting equipment, automation machinery, mining systems, packaging equipment, and material handling applications.
Every worm gear undergoes material verification, dimensional inspection, gear tooth measurement, bore inspection, CMM testing, and final quality verification before shipment.
Looking for a reliable QT400 ductile iron worm gear manufacturer?
MetalKeen provides complete OEM manufacturing services, including engineering support, pattern development, ductile iron casting, CNC machining, gear finishing, heat treatment, and comprehensive quality inspection. Whether you need replacement worm wheels, custom transmission gears, or complete gearbox components, our engineering team delivers durable, precision-machined solutions tailored to your performance requirements.
