Industrial Machinery Parts Manufacturer: Custom CNC, Casting and Metal Manufacturing
Finding the right industrial machinery parts manufacturer is about more than finding a factory that can produce metal parts.
For industrial equipment manufacturers, a suitable supplier needs to understand engineering drawings, material selection, manufacturing processes, dimensional tolerances, surface finishing, quality inspection, and production volume. For repeat orders, the ability to maintain consistent quality is just as important as producing the first sample correctly.
Shenzhen Selection Hardware is a China-based one-stop manufacturer providing custom manufacturing services including CNC machining, precision casting, die casting, and sheet metal fabrication.
With approximately 15 years of manufacturing experience, a team of around 100–120 employees, and 75 CNC machines, we support customers requiring custom metal and plastic components for industrial equipment, robotics, electronics, automotive applications, and other products.
Custom Machinery Parts Based on Your Drawings
Industrial equipment is rarely built entirely from standard components.
Manufacturers often require custom:
- Housings
- Brackets
- Covers
- Shafts
- Bushings
- Mounting components
- Structural parts
- Mechanical components
- Enclosures
- Connectors
- Replacement parts
These components may have different manufacturing requirements even when they are used in the same machine.
For example, one part may require CNC machining for dimensional accuracy, while another may be more suitable for die casting or precision casting because of its geometry and production volume.
This is why we evaluate the complete part requirement before recommending a manufacturing process.
CNC Machinery Parts Manufacturing
CNC machining is one of our primary manufacturing capabilities.
Shenzhen Selection Hardware currently operates 75 CNC machines, including 3-axis, 4-axis, 5-axis equipment and CNC turning machines.
Depending on the component and machine configuration, our CNC machining capability can handle parts with dimensions of approximately 1 meter.
CNC milling
CNC milling is suitable for custom components requiring features such as:
- Precision holes
- Threads
- Slots
- Pockets
- Flat surfaces
- Curved surfaces
- Mounting features
- Complex three-dimensional geometry
3-axis machining can be suitable for many conventional components, while 4-axis and 5-axis machining can provide better access to multiple surfaces and reduce the number of setups for more complex parts.
CNC turning
CNC turning is commonly used for cylindrical components such as:
- Shafts
- Pins
- Bushings
- Spacers
- Sleeves
- Hubs
- Threaded components
The appropriate machining method depends on the geometry and functional requirements of the part.
Precision Machining and Tolerance Control
For custom industrial components, tolerance should be determined by function rather than simply making every dimension as tight as possible.
Shenzhen Selection Hardware normally achieves approximately ±0.01 mm for precision machining.
For suitable components with higher precision requirements, tolerances down to approximately ±0.005 mm can be achieved.
The actual achievable tolerance depends on factors such as:
- Material
- Part size
- Geometry
- Feature location
- Machining process
- Tooling
- Production conditions
- Inspection method
For this reason, we review critical dimensions and functional requirements together with the customer’s drawings before production.
Materials for Custom Machinery Parts
We process a variety of metals and plastics for custom components.
Common materials include:
- Aluminum
- 304 stainless steel
- 316 stainless steel
- Carbon steel
- Brass
- Copper
- Engineering plastics
Among these materials, aluminum, stainless steel, and brass are particularly common in our production.
Aluminum
Aluminum is widely used for housings, brackets, structural components and other parts where low weight, machinability and corrosion resistance are important.
Stainless Steel
304 and 316 stainless steel are commonly selected for components requiring corrosion resistance, durability and a specific appearance.
Brass
Brass is often used for mechanical and electrical components because of its machinability, corrosion resistance and electrical properties.
Material selection should always be based on the actual application rather than simply choosing the most commonly used material.
Beyond CNC: Choosing the Right Manufacturing Process
A capable industrial machinery parts manufacturer should not automatically recommend CNC machining for every component.
Different production methods are appropriate for different part designs.
CNC Machining
Suitable for components requiring precision machining, controlled dimensions, complex features and flexible production.
Precision Casting
Suitable for complex components where producing the entire shape from solid material would require significant machining.
Critical surfaces can then be CNC machined when necessary.
Die Casting
Suitable for appropriate non-ferrous components, particularly when production volume is high and the geometry is suitable for die casting.
Sheet Metal Fabrication
Suitable for brackets, panels, covers, enclosures and other fabricated components.
In some projects, combining multiple processes can provide a better balance between manufacturing cost, dimensional requirements and production efficiency.
Manufacturing Experience Across Different Applications
Our manufacturing experience covers more than one product category.
This is important because industrial equipment suppliers often require components with different materials, geometries, production quantities and finishing requirements.
Automotive Components — 200,000 Pieces
For an automotive component project, Shenzhen Selection Hardware produced aluminum investment-cast parts used as internal components.
The parts did not require additional surface treatment, and the production quantity reached approximately 200,000 pieces.
This type of high-volume project requires stable casting processes, consistent dimensional control and production repeatability.
Automotive Modification Parts — 100–500 Pieces per Model
We also manufacture various custom automotive modification components using CNC machining.
These parts are produced from aluminum and receive hard anodizing.
Different models are produced in quantities of approximately 100–500 pieces per model.
This type of project requires flexibility because different parts may have different geometries, dimensions and finishing requirements while still requiring consistent production quality.
Electronic Product Housings — 100,000 Pieces per Year
For a Russian customer, we manufacture zinc alloy die-cast housings for electronic products.
The housings receive electroplating as the surface finish, with annual production reaching approximately 100,000 pieces.
This project demonstrates the importance of coordinating die casting, finishing and high-volume production requirements.
Custom Electronic Lock Housings — 1,500 Pieces
Another project involves custom electronic lock housings manufactured from zinc alloy through die casting, followed by electroplating in several colors.
The production quantity is approximately 1,500 pieces.
Different surface colors require additional attention to finishing consistency, making surface quality an important part of the production process.
Computer Keyboard Components — 2,000 Pieces
We also produce multiple types of computer keyboard components.
Depending on the component, production involves CNC machining or zinc alloy die casting, with quantities of approximately 2,000 pieces.
These projects require consistency across multiple part designs rather than simply producing one individual component.
Quality Inspection for Industrial Equipment Parts
Manufacturing capability needs to be supported by appropriate inspection.
Our quality and testing equipment includes:
- CMM coordinate measuring machine
- Height gauges
- Optical measurement equipment
- Hardness testers
- Surface roughness testers
- Calipers
- Blade micrometers
- Color difference testing equipment
- Rockwell hardness tester
- Tensile testing equipment
- Smoke testing equipment
Different inspection methods can be applied according to the part’s requirements.
For example, dimensional inspection may be performed using CMM or optical measurement equipment, while hardness, surface roughness, color, or mechanical performance may require separate testing methods.
For repeat production, inspection is particularly important because the objective is not only to make one acceptable sample, but to maintain consistency throughout production batches.
Surface Finishing and Secondary Processes
Industrial components often require more than machining or casting.
Depending on the material and application, we can provide finishing options including:
- Anodizing
- Hard anodizing
- Plating
- Passivation
- Polishing
- Powder coating
- Painting
- Laser marking
We also support secondary operations and assembly processes such as:
- Riveting
- Pressing
- Tapping
- Laser processing
- Assembly
This allows customers to coordinate multiple manufacturing requirements through one supplier.
Supporting Medium- and High-Volume Production
Shenzhen Selection Hardware is particularly experienced in medium- and high-volume production.
Our production environment includes 75 CNC machines together with supporting equipment for machining, finishing, inspection, assembly and other secondary operations.
Our customer projects range from several hundred pieces per model to annual production volumes of approximately 100,000 pieces and individual production programs reaching approximately 200,000 pieces.
This range of production experience is useful for customers who expect a component to move from prototype or initial production into repeat manufacturing.
What Should You Include in an RFQ?
When requesting a quotation for custom machinery parts, providing complete technical information can make the quotation process faster and more accurate.
We recommend providing:
- 2D engineering drawings
- 3D CAD files
- Material grade
- Quantity
- Dimensional tolerances
- Surface treatment requirements
- Critical dimensions
- Inspection requirements
- Packaging requirements
- Target delivery schedule
If you are still evaluating the manufacturing process, you can also send the drawing and basic project information first.
Our engineering team can review the component and determine whether CNC machining, precision casting, die casting, sheet metal fabrication, or a combination of processes is appropriate.
Why Choose Shenzhen Selection Hardware?
When selecting an industrial machinery parts manufacturer, we believe customers should evaluate the entire manufacturing capability rather than focusing on one machine, one quotation, or one tolerance specification.
Shenzhen Selection Hardware provides:
- Approximately 15 years of manufacturing experience
- Approximately 100–120 employees
- 75 CNC machines
- 3-axis, 4-axis and 5-axis CNC machining
- CNC turning
- Machining capability up to approximately 1 meter depending on the component
- Standard precision capability around ±0.01 mm
- Higher precision capability down to approximately ±0.005 mm for suitable projects
- CMM and multiple inspection and testing capabilities
- CNC machining
- Precision casting
- Die casting
- Sheet metal fabrication
- Surface finishing and secondary operations
- Medium- and high-volume production
- Experience serving customers in Australia, the United States, the United Kingdom, Italy, Russia and other international markets
Our goal is to provide a reliable manufacturing partner for companies that need custom components rather than simply supplying individual parts.
Request a Quote
If you are looking for an industrial machinery parts manufacturer, custom machinery parts manufacturer, or CNC machinery parts supplier, send your drawings and project requirements to Shenzhen Selection Hardware.
Our team can review the material, geometry, tolerances, production quantity and finishing requirements and recommend a suitable manufacturing process.
Shenzhen Selection Hardware — One-stop manufacturing for CNC machining, precision casting, die casting and sheet metal fabrication.
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