Powder Metal Gears & Precision Transmission Components

Engineered for Excellence

Your trusted partner in precision powder metallurgy and gear manufacturing.

Wenling Zuhui Import And Export Co., Ltd., formerly Zhejiang Kangtao Automation Equipment Co., Ltd., has been a leader in powder metallurgy and precision gear manufacturing since 1998. We specialize in delivering high-performance transmission components for automotive, industrial machinery, automation, and power tools.

Our expertise spans powder metal sintering, gear machining, and custom CNC fabrication. We produce a wide range of parts including helical gears, spur gears, sintered bushings, VVT sprockets, pulleys, shafts, cams, and specialized hardware accessories.

Over 20 years of manufacturing experience
300+ completed industrial projects
100+ technical and engineering staff
ISO-compliant quality control systems

Custom OEM & ODM Solutions

From prototype to mass production

Our Precision Products

High-quality powder metallurgy and machined components for diverse industrial applications.

Spur Gear

Precision-cut spur gears made from powder metal or forged steel. Ideal for parallel shaft transmission in machinery, conveyors, and automation systems.

• High torque transmission
• Low noise operation
• Custom tooth profiles
• Materials: Fe-Cu-C, Fe-Ni, etc.

CNC Machined Parts

Custom aluminum, steel, and brass components with tight tolerances. Used in automotive, aerospace, and industrial equipment.

• 3-5 axis CNC milling
• Precision turning
• Surface finishing options
• Fast prototyping

Powder Metal Gears

Sintered powder metallurgy gears offering cost-effective mass production with minimal machining waste.

• Planetary, sun, ring gears
• High density & strength
• Net-shape forming
• Reduced material loss

Gear Shafts

Integrated gear-shaft assemblies for compact transmission systems. Available in hardened steel or sintered metal.

• Splined & keyed options
• Heat-treated for durability
• Custom lengths & diameters
• High fatigue resistance

Sintered Pulley

Lightweight, durable pulleys for water pumps, compressors, and automotive timing systems.

• Oil-impregnated options
• Corrosion-resistant coatings
• High-speed balance
• Custom groove profiles

Helical Gear

High-efficiency helical gears for smooth, quiet power transmission in high-speed applications.

• Angled tooth engagement
• Reduced vibration
• Higher load capacity
• Used in gearboxes & reducers

Sintered Bushing & Bearings

Sintered Bushing

Self-lubricating oil-impregnated bronze or iron bushings for low-maintenance applications.

• Oil-impregnated for life
• Flanged & sleeve types
• High wear resistance
• Cost-effective alternative

VVT Sprocket & Timing Components

VVT Sprocket

Variable Valve Timing sprockets for automotive engines, manufactured with precision sintering.

• High torque transmission
• Durable under heat
• Custom tooth geometry
• OEM replacement specs

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Custom Manufacturing Services

From design to delivery, we offer end-to-end solutions for your transmission component needs.

Powder Metallurgy Sintering

Our advanced powder metallurgy process allows for high-volume production of complex metal parts with minimal waste and excellent material properties.

• Pressing & sintering of Fe, Cu, Fe-Cu, Fe-Ni alloys
• Density control from 6.0 to 7.2 g/cm³
• Secondary operations: sizing, coining, machining
• Oil impregnation for self-lubrication
• Heat treatment & surface coating options

Gear Machining & Finishing

Precision gear cutting, grinding, and finishing to meet tight tolerances and high-performance requirements.

• Helical, spur, bevel, planetary gear machining
• hobbing, shaping, shaving, grinding
• Hardened & ground gears (Grade 6-8 AGMA)
• Reverse engineering from samples
• Prototyping to mass production

Why Choose Us?

Proven performance, reliability, and customer satisfaction.

300+

Finished Projects

Delivered globally across industries

20+

Years Experience

Since 1998 in precision manufacturing

100+

Technical Staff

Engineers & skilled technicians

20+

Awards Won

For quality and innovation

Our Core Strengths

Delivery Speed

Efficient production planning and logistics ensure on-time delivery, even for urgent orders.

Strict Management

Advanced equipment, mature processes, and strict quality control systems ensure consistency.

Quality Service

Customer-focused approach with responsive communication and technical support.

Frequently Asked Questions

Common questions about our products and services.

What is powder metallurgy?

Powder metallurgy is a manufacturing process that involves compacting metal powders into a desired shape and then sintering them at high temperatures to form a solid part. It allows for complex shapes with minimal waste and excellent material utilization.

Can you produce custom gears from samples?

Yes, we offer reverse engineering services. Send us your sample or drawing, and we can replicate or improve the design for production.

What materials do you use for sintered gears?

Common materials include Fe-Cu-C, Fe-Ni, Fe-Mo, and bronze-based powders. We can also work with stainless steel and other alloys based on application requirements.

What industries do you serve?

We serve automotive, industrial machinery, power tools, garden equipment, compressors, automation, and consumer electronics sectors.

Do you offer prototyping?

Yes, we provide rapid prototyping services using CNC machining and small-batch sintering to validate designs before mass production.

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Precision Powder Metallurgy & Gear Solutions