High Precision CNC Machining Services For Metal And Plastic Parts

When a machined part needs to fit into an assembly, dimensional accuracy matters. A small deviation can affect installation, create clearance problems, or lead to additional work during assembly. These risks make the choice of CNC machining supplier an important part of product development and production planning.

 

Deep Mould provides high precision CNC machining services for custom metal and engineering plastic components. Based in Dongguan, China, we work with customers in the automotive, electronics, medical, and industrial equipment sectors. Our team handles projects ranging from single prototypes to repeat production orders, using customer drawings and technical specifications to plan the machining process.

 

CNC Machining for Different Part Designs

Part geometry, tolerance requirements, and production quantity all influence the choice of machining method. Deep Mould offers 3-axis, 4-axis, and 5-axis CNC machining, as well as turning, drilling, boring, and grinding.

 

For parts with features on several sides, 4-axis or 5-axis machining may reduce the need for repeated setups. This can help maintain the relationship between key features and reduce handling time. Simpler components may be more economical to produce using conventional 3-axis machining or turning.

 

We review each design according to its actual requirements rather than applying the same process to every project. Our custom high precision CNC machining services cover prototypes, small batches, and production orders. With a minimum order quantity of one piece, customers can also request a sample before deciding on a larger order.

 

Material Selection and Surface Finishing

The right material depends on how the part will be used. Strength, weight, corrosion resistance, machinability, and budget can all affect the decision. Deep Mould machines a range of metals and engineering plastics for different component requirements.

 

Available materials include:

 • Aluminum alloys: 6061, 6063, and 7075 for lightweight components, housings, and structural parts.

 • Stainless steel: 303 and 304 for parts that require corrosion resistance and suitable mechanical properties.

 • Carbon steel and tool steel: For components with specific strength, hardness, or wear requirements.

 • Brass and copper: For selected electrical, thermal, and mechanical applications.

 • Titanium: For parts where strength-to-weight ratio is an important consideration.

 • Engineering plastics: POM, PEEK, and nylon for components that require specific mechanical, chemical, or weight characteristics.

 

Surface finishing may also affect the final part dimensions and performance. Available options include anodizing, electroplating, sandblasting, polishing, and black oxide coating. The appropriate treatment depends on the material, operating environment, appearance requirements, and dimensional tolerances.

 

If a part includes close-fitting holes, mating surfaces, or other critical features, it is useful to identify them in the drawings and specify whether dimensions apply before or after finishing. This gives the machining team clearer requirements to work with.

 

 

Tolerance Requirements and Quality Inspection

Not every dimension on a component needs the same tolerance. Applying tight tolerances to every feature can increase machining time and inspection costs without improving the part's function. Identifying critical dimensions early helps keep the design practical and the quotation accurate.

Deep Mould's standard machining tolerance is ±0.01 mm for many part geometries. Actual results depend on factors such as material, part size, feature location, machining setup, and inspection method. For tighter requirements, our engineering team can review the drawings and confirm feasibility before production.

 

Our eight in-house engineers review project details before machining begins. During this stage, they can identify potential issues related to tool access, part geometry, and manufacturing cost. We also carry out dimensional inspection before shipment, while material certificates are available upon request for projects that require material documentation.

 

Providing clear drawings and inspection criteria from the start helps reduce misunderstandings and makes it easier to assess whether the finished parts meet the intended requirements.

 

CNC Machining for Prototypes and Production

The priorities for a prototype may differ from those for regular production. During product development, customers may need to check dimensions, fit, or assembly performance. For repeat orders, consistency, unit cost, and delivery planning often become more important.

 

Deep Mould supports both stages through small-batch precision CNC machining and production services. Before machining, our team can review the design and suggest practical changes where appropriate. For example, improving tool access or removing unnecessary features may reduce processing time while preserving the part's functional requirements.

 

We also communicate directly with customers about materials, tolerances, finishing, and production details. Typical lead times range from one to three weeks, depending on part complexity and order quantity. We confirm the schedule after reviewing the specific requirements.

 

Information Needed for a CNC Machining Quote

To help us assess your project, please provide as much of the following information as possible:

 • 2D drawings or 3D CAD files

 • Material grade and order quantity

 • Critical dimensions and tolerance requirements

 • Surface finish or coating specifications

 • Intended application and operating conditions

 • Inspection, certification, or packaging requirements

We accept common file formats, including STEP, STP, IGES, IGS, X_T, SLDPRT, DWG, DXF, and PDF. If some details are still being finalized, you can send the available files first so our team can review the design and identify any missing information.

 

Request a Quote for Custom CNC Machined Parts

Choosing a CNC machining supplier involves more than comparing unit prices. Material selection, machining time, tolerance requirements, surface finishing, and inspection all affect the final cost and suitability of a part.

 

Deep Mould provides high precision CNC machining services for custom metal and engineering plastic components, from initial prototypes to repeat production orders. Send us your drawings, material requirements, and estimated quantity. Our team will review the details and respond to your quotation request within 24 hours.