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Custom Machined Part Manufacturer & CNC Contract Machining Services

Precision-machined metal and engineering plastic components manufactured strictly to your CAD models, 2D drawings, and GD&T tolerances for industrial, automation, and mechanical applications.

OEM contract manufacturer specializing in high-precision CNC turning, 5-axis milling, wire EDM, and secondary finishing. We process a wide range of engineering metals and plastics, delivering components backed by full material test certificates and digital CMM inspection reports. Every production order follows strict internal routing protocols from raw material sawing to final deburring and protective packaging.

Driven Pulley
Engineered for belt-driven power transmission systems in industrial machinery, agricultural equipment, and HVAC applications, the Driven Pulley receives rotational input from drive pulleys via belts,
Precision Machined Part
Manufactured for critical assemblies in aerospace, medical device, and high-performance automotive applications, the Precision Machined Part represents a custom-fabricated component produced to
Motor Machined Parts
Produced for electric motor manufacturing and repair operations, the Motor Machined Parts encompass the precision components required for rotor support, housing assembly, and shaft alignment in AC,
Household Appliances Machined Part
Designed for the high-volume production environments of washing machines, refrigerators, dishwashers, and HVAC equipment, the Household Appliances Machined Part includes brackets, shafts, pulleys,
Shaft Sleeves
Designed as replaceable wear surfaces for rotating machinery in industrial pumping, marine propulsion, and power generation applications, the Shaft Sleeves protect underlying shaft journals from
Motor Shaft Flange
Engineered as the critical interface component between motor rotors and driven equipment, the Motor Shaft Flange provides a precision-machined mounting surface that transfers torque while maintaining
Motor Shaft Gear
The Motor Shaft Gear is a toothed component mounted on motor shafts, designed to transmit torque and adjust speed by meshing with other gears in mechanical transmission systems.
Motor Shaft Hub
Serving as the central mounting component that connects rotating elements to motor output shafts, the Motor Shaft Hub provides a secure, precision-machined interface for attaching pulleys, sprockets,
Shaft Coupling
Engineered as the mechanical link between two rotating shafts in power transmission systems, the Shaft Coupling accommodates minor misalignments while transmitting torque from drive to driven
Pulley
Designed for belt-driven power transmission in industrial machinery, agricultural equipment, and automotive accessory drives, the Pulley converts rotational motion from a power source into linear
Multi‑groove Pulley
Designed for high-density power transmission in serpentine belt systems for automotive engines, industrial compressors, and heavy machinery, the Multi-groove Pulley accommodates multiple belt ribs
Round Belt Pulley
Designed for light-duty power transmission and conveyor applications in packaging machinery, laboratory equipment, and small parts handling systems, the Round Belt Pulley accommodates round

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Types / Product Range

CNC Turned Components:

Precision stepped shafts, threaded bushings, sealing collars, and cylindrical fittings produced on multi-axis turning centers with live tooling.

CNC Milled Structural Parts:

Complex prismatic plates, mounting brackets, slotted manifolds, and multi-sided housings machined on 4-axis and 5-axis vertical/horizontal centers.

Housings & Enclosures:

Custom gearboxes, sensor bodies, and instrument enclosures featuring deep pocket milling and tight-tolerance bearing bores.

Custom Fixtures & Jigs:

Specialized assembly tooling, alignment blocks, and automated positioning plates built for manufacturing line integration.

Applications

Industrial Automation & Robotics:

Robot arm joints, actuator linkage plates, guide rails, and high-speed motion transfer components.

Fluid & Pneumatic Systems:

Manifold blocks, valve spools, adapter plates, and custom fluid connector housings.

Electronics & Semiconductor:

Enclosure chassis, heat sink mounting plates, vacuum chamber components, and isolator rings.

General Machinery:

Heavy-duty bearing blocks, mechanical linkage arms, gear blanks, and structural drive mounts.

Materials & Manufacturing Options

Aluminum Alloys	Al 6061-T6, 7075-T6, 5052, 2024
Stainless Steels	AISI 303, 304, 316, 410, 17-4PH
Carbon & Alloy Steels	AISI 1018, 1045, 4140, 4340, 8620
Engineering Plastics	POM (Acetal/Delrin), PTFE, PEEK, Nylon (PA66), Polycarbonate (PC)
Surface Finishes	Clear/color anodizing (MIL-A-8625), hard coat anodizing, chemical conversion coating (Alodine/SurTec 650), passivation, electropolishing, black oxide, zinc plating, and powder coating.

Technical Specifications

Technical Parameter	Machining Capability
CNC Turning Envelope	Diameter: φ5–φ500 mm; length: up to 1,000 mm
CNC Milling Envelope	X-axis: up to 1,500 mm; Y-axis: up to 800 mm; Z-axis: up to 600 mm
Achievable Tolerance	Standard linear tolerance: ±0.01 mm; precision grinding: down to ±0.003 mm
Surface Roughness	Ra 0.2–1.6 μm across machined surfaces
Geometric Control	Flatness and parallelism controlled within 0.005 mm per 100 mm span

Key Design & Performance Considerations

Tool Access & Fillet Radii:

Internal pocket corners designed with appropriate radii matching standard end-mill diameters to eliminate unnecessary high-cost EDM operations.

Wall Thickness & Distortion:

Thin-walled structural parts engineered with web ribs or staged stock removal to prevent clamping distortion and thermal warping.

Thread Integrity:

Blind and through holes specified with appropriate thread depth and tap drill sizing to ensure proper engagement for high-load assembly studs.

Manufacturing & Quality Control

Production Process:

Raw material sawing -> CNC rough milling/turning -> Stress-relief heat treatment (if required) -> Precision 5-axis finish machining -> Deburring & ultrasonic cleaning -> Surface finishing -> Final inspection -> Protective packaging.

Machining Equipment:

DMG Mori 5-axis machining centers, Mazak CNC turning centers with sub-spindles, Sodick wire EDM machines, and Okamoto surface grinders.

Inspection & Testing

Dimensional Metrology:

Hexagon Coordinate Measuring Machines (CMM) and Keyence optical image dimensions measuring systems calibrated to ISO/IEC 17025.

100% Feature Verification:

Critical dimensions, hole patterns, and GD&T callouts checked per customer quality control plans.

Material Traceability:

Positive Material Identification (PMI) spectrometer testing and EN 10204 3.1 mill test certificate verification prior to release.

Surface Inspection:

Digital surface roughness testers and thread plug/ring gauges used for thread pitch validation.

Why Choose Our Machining Services

01.

Direct factory production utilizing high-rigidity multi-axis CNC machine tools with zero outsourced critical machining steps.

02.

Rigorous DFM (Design for Manufacturing) review conducted prior to programming to optimize cycle times and reduce machining costs.

03.

Complete quality documentation packages including dimensional inspection sheets, material test reports, and certificate of conformity.

04.

Stable, repeatable batch production supported by automated tool life monitoring and in-process probing systems.

OEM / Bulk Order Support

Flexible volume scheduling ranging from single rapid prototypes to high-volume annual blanket orders with scheduled call-off shipments.

Customized export packaging featuring heavy-duty VCI anti-rust bags, custom foam inserts, and reinforced corrugated cartons or wooden crates to prevent transit damage.

Dedicated project engineering support providing technical feedback, pricing, and lead-time confirmation within 24 hours of drawing receipt.

Our Certification

FAQ

Q: What CAD and drawing file formats do you accept for quotation?

A: We accept 3D models in STEP, IGES, Parasolid, and SolidWorks formats, alongside 2D manufacturing drawings in PDF or DXF format containing complete GD&T callouts.

Q: How do you handle confidentiality for proprietary customer designs?

A: We sign mutual Non-Disclosure Agreements (NDAs) prior to file review, and all customer data is stored on secure, access-restricted servers.

Q: What is your standard lead time for prototype samples versus volume orders?

A: Rapid prototype samples typically require 5 to 10 days depending on geometry and finish requirements. Serial volume production orders are fulfilled within 20 to 35 days.

Q: Can you provide material test reports and inspection data with shipments?

A: Yes. Every shipment includes a complete Dimensional Inspection Report and EN 10204 3.1 Material Test Certificates corresponding to the raw material heat lot.

Q: How do you prevent burrs on complex internal machined pockets?

A: We utilize high-speed micro-deburing tools, manual edge breaking, and ultrasonic cleaning baths to ensure all components are thoroughly deburred and chip-free.

Q: What post-processing surface treatments can you apply internally?

A: We provide in-house bead blasting, vibratory deburring, and passivation, while specialized finishes like anodizing, plating, and powder coating are managed through audited long-term partner facilities.

Ningbo Uni-drive Technology Co., Ltd. is one of the most professional machined part manufacturers and suppliers in China. Please feel free to buy cheap machined part made in China here and get pricelist from our factory. All customized products are with high quality and competitive price.

Motor Shaft Hub, Pulley, Household Appliances Machined Part