Precision Manufacturing, Built Around Your Requirements
Years of Excellence
PRODUCTION MACHINES
CUSTOM PROJECTS COMPLETED
GLOBAL CUSTOMERS SERVED
Main Products
Manufacturing Capabilities

Precision CNC milling, turning, and Swiss machining for custom metal and engineering plastic components.

Custom compression, extension, torsion, and specialty springs manufactured for demanding dimensional and performance requirements.

Miniature shafts, pins, screws, bushings, and other small precision parts for compact and high-accuracy applications.

Specialized engineering services designed to enhance performance, durability, and process efficiency.
Our solutions empower industries to operate reliably under demanding conditions.

Engineering support, prototyping, material selection, process optimization, and scalable production tailored to your project.
Built for Demanding Applications
Wearable Devices
Miniature components and springs for watches, smart wearables, and compact electronic devices.

Consumer Electronics
Precision metal parts, connectors, fasteners, and small mechanical assemblies.

Medical Devices
Custom miniature parts and springs for precision medical and diagnostic equipment.

Automotive Electronics
Precision components for electronic modules, sensors, control systems, and assemblies.

Industrial Equipment
Custom-machined and formed parts for industrial mechanisms, equipment, and automation systems.

Why Work With Dongli Precision
10+ Years
Experience
Extensive experience in precision component manufacturing.
Advanced
Equipment
CNC machining, spring forming, grinding, and inspection equipment.
Strict Quality
Control
In-process inspection and quality checks for consistent production.
Flexible OEM/ODM
Support
From prototyping and small batches to stable volume production.
- Precision & Consistency
- Flexible OEM/ODM Support
- Reliable Quality & Delivery
Frequently Asked Questions
We manufacture CNC-machined parts, precision springs, micro components, shafts, pins, screws, bushings, and other custom metal parts based on customer drawings or samples.
Yes. We support OEM and ODM projects from drawing review and engineering evaluation to prototyping, sample approval, mass production, inspection, and delivery.
We commonly work with stainless steel, aluminum, copper, brass, carbon steel, alloy wire, and selected engineering plastics.
Our CNC machining capabilities include milling, turning, Swiss-type machining, and precision machining for small and complex components.
We produce compression springs, extension springs, torsion springs, and custom spring designs for electronic, medical, wearable, automotive, and industrial applications.
Yes. We support prototype development, sample orders, small-batch production, and volume manufacturing depending on your project stage.
Quality control is carried out throughout production, including dimensional inspection, in-process checks, final inspection, and process verification based on customer requirements.
Yes. Available processes include grinding, heat treatment, surface treatment, polishing, plating, anodizing, laser marking, cleaning, assembly, and custom packaging.
Please provide drawings, 3D files, material requirements, tolerances, surface finish, order quantity, and any special application or inspection requirements.
Quotation and sample lead times depend on part complexity, material, tolerance, and quantity. Once we review your drawings and requirements, we will confirm the expected timeline.




















