Precision Machining Services for Custom Metal & Plastic Parts
Factory-direct precision machining for custom metal and plastic components with critical dimensions, tight tolerance features, assembly interfaces and inspection requirements. Upload your CAD files for DFM review, tolerance evaluation, material recommendations and inspection planning.
Tight Tolerance Review
Critical features reviewed by geometry, material and process.
Milling, Turning & 5-Axis
Process selected based on part shape and tolerance needs.
Critical Dimension Inspection
Hole positions, OD/ID, threads and mating surfaces checked.
Prototype to Low-Volume
Engineering samples, pilot builds and repeat production support.
NDA Available
Confidential CAD review before quotation.
Can you machine tight tolerance parts? | Yes. Baosheng reviews each drawing to identify critical dimensions, tolerance risks, datum references and suitable inspection methods before machining. |
Can you inspect critical features? | Yes. Critical dimensions, hole positions, threads, flatness, OD/ID, mating surfaces and datum relationships can be inspected based on project requirements. |
Can you support prototypes and low-volume production? | Yes. We support precision machined prototypes, engineering samples, pilot builds and repeat low-volume production. |
Can you recommend the right process? | Yes. Depending on geometry, we review CNC milling, turning, 5-axis machining, Swiss machining, EDM or combined process options. |
Can you provide inspection reports? | Yes. Dimensional inspection reports, first article inspection and CMM inspection can be provided when required. |
Can you sign an NDA before reviewing drawings? | Yes. NDA can be arranged before reviewing confidential CAD files and technical drawings. |
Turning Capability
Precision Machining Capability
Precision machining is not about making every dimension unnecessarily tight. It is about identifying the features that affect fit, function, motion, alignment or assembly, then planning the process and inspection around those features.
| Capability Area | Manufacturing Range | Best For |
|---|---|---|
| Precision CNC Milling | Milled components with critical holes, pockets, mating surfaces, flatness or datum requirements. | Housings, brackets, fixtures, plates, heat sinks and precision structural components. |
| Precision CNC Turning | Turned parts with controlled OD, ID, threads, grooves, shoulders and concentricity requirements. | Shafts, bushings, sleeves, spacers, pins, fittings and round precision components. |
| 5-Axis Precision Machining | Multi-surface parts with angled features, complex geometry and critical feature-to-feature relationships. | Robotic parts, UAV brackets, medical fixture components and complex housings. |
| Swiss Precision Machining | Small-diameter, slender or high-repeatability turned parts. | Precision pins, micro shafts, connectors, small sleeves and miniature components. |
| EDM & Wire EDM Support | Hard materials, sharp internal corners, deep features or precision through-cut profiles. | Tooling inserts, hard metal profiles, tight slots, mold components and die parts. |
| Inspection Support | Dimensional inspection, CMM inspection, thread gauges, pin gauges and inspection reports when required. | Tight tolerance parts, functional fits, assembly interfaces and critical features. |
Process Fit
When to Choose Precision Machining
Precision machining is recommended when a part has critical dimensions, functional fits, tight tolerance features, datum relationships or assembly interfaces that directly affect performance. Instead of treating every dimension the same, Baosheng reviews your drawing to identify which features need tighter control and which features can remain standard to reduce cost and manufacturing risk.
Simple brackets may be more cost-effective with CNC milling service. Round components may fit CNC turning service. Early concept models may be faster with 3D printing service.
Choose precision machining when
The part has assembly interfaces, functional fits, hole patterns, mating surfaces or inspection report requirements.
Avoid unnecessary tight tolerances
Only functional and assembly-critical dimensions should be controlled tightly to reduce cost and risk.
Review finishing early
Anodizing, plating, passivation and polishing can affect edges, threads and functional dimensions.
Send 3D + 2D files
CAD defines geometry; 2D drawings define tolerances, datums, threads and inspection requirements.
Process Comparison
Precision Machining vs Standard CNC Machining
Precision machining does not mean every dimension must be extremely tight. A better approach is to identify the dimensions that affect fit, function, motion, sealing, alignment or assembly.
01
Standard CNC Machining
02
Precision Machining
03
High-Complexity Machining
Part Types
Precision Machined Parts We Manufacture
Baosheng supports precision machined components for engineering applications where critical dimensions, inspection methods and assembly performance matter.
- Precision aluminum housings
- Tight tolerance brackets
- Bearing blocks
- Shafts and bushings
- Sleeves and spacers
- Precision pins
- Robotic joint components
- Medical device fixture components
- Optical mounting components
- Sensor housings
- Electronic enclosure components
- Fluid manifold components
- Heat sink components
- Precision test fixtures
- Small threaded connectors
- UAV structural components
- Automation equipment parts
- Hard metal tooling components
Materials & Finishes
Materials and Surface Finishing for Precision Machined Parts
Material selection affects tolerance stability, machinability, surface finish, dimensional movement and cost. For precision parts, Baosheng reviews material choice together with part geometry, wall thickness, tolerance requirements, finishing needs and inspection method before quoting.
Surface finishing can affect dimensions, threads, sharp edges, cosmetic surfaces and functional fits. Finishing requirements should be reviewed before machining so that critical dimensions and inspection plans can account for post-processing effects.
Aluminum Precision Machining
Housings, brackets, fixtures, heat sinks and prototypes.
7075 Aluminum CNC Machining
High-strength UAV, robotics and structural components.
Stainless Steel Precision Machining
Corrosion-resistant precision parts, fixtures and device components.
Brass CNC Machining
Connectors, fittings, inserts and electrical precision parts.
Copper CNC Machining
Thermal and electrical precision components.
PEEK Precision Machining
High-performance plastic components with functional requirements.
Anodized Precision Machined Parts
Corrosion resistance and appearance control for aluminum components.
Passivation
Corrosion resistance for stainless steel precision parts.
Need help deciding which tolerances are truly critical?
Upload your CAD files and drawings. Our engineers will review critical features, datum references, process risks and inspection needs before quoting.
Quality Control
Tolerance, Datum Control and Inspection
Precision machining quality depends on understanding which features are critical. Baosheng reviews your 3D CAD model and 2D drawing to identify datum references, tight tolerance dimensions, mating surfaces, hole patterns, threaded features and inspection requirements before machining.
CAD Review
Geometry, material and project requirements checked.
Critical Features
Tight dimensions, datums and fits identified.
Process Review
Milling, turning, 5-axis, Swiss or EDM selected.
Tolerance Risk
Material, thin walls and finishing effects reviewed.
First Article
Initial inspection available when required.
Final QC
CMM, gauges, optical or manual inspection as needed.
Report
Dimensional inspection report available upon request.
Application Proof
Precision Machining Case Studies
The cases below focus on critical dimensions, assembly function, material selection, finishing impact and inspection planning.
| Project | Material / Process | Challenge | Inspection / Result |
|---|---|---|---|
| Precision Aluminum Sensor Housing | 6061 aluminum · CNC milling + black anodizing · 120 pcs | Critical connector opening, threaded mounting holes and cosmetic surface requirements. | Connector opening size, hole position and mating surface dimensions checked before finishing; parts supported repeatable sensor assembly. |
| Stainless Steel Alignment Fixture | 304 stainless steel · CNC milling + passivation · 35 pcs | Fixture required stable datum surfaces, tight hole pattern control and corrosion resistance. | Flatness, hole position and datum relationship checked before passivation; fixture improved repeatable positioning during assembly. |
| Precision Turned Shaft and Bushing Set | 316 stainless steel + POM · CNC turning + deburring · 300 sets | Shaft and bushing fit needed smooth rotation and consistent assembly clearance. | OD, ID, length and fit-related dimensions checked by sampling inspection; batch showed consistent rotational fit. |
| 5-Axis Robotic Joint Component | 7075-T6 aluminum · 5-axis CNC machining + clear anodizing · 60 pcs | Multiple angled faces, datum relationship and precision hole alignment for robotic assembly. | CMM inspection checked datum surfaces, hole positions and assembly interfaces; assembly consistency improved. |
Production Transition
From Precision Prototypes to Low-Volume Production
Many precision parts begin as functional prototypes and later move into pilot builds or low-volume production. Baosheng can help review tolerance strategy, material selection, inspection planning, finishing consistency and repeat order requirements so validated designs can transition more smoothly into production.
Precision prototype machining
Validate fit, function, tolerance strategy and material selection before pilot runs.
First article inspection
Check critical dimensions before proceeding with repeat low-volume production.
Finishing consistency
Review anodizing, passivation, plating or polishing effects before repeat orders.
Low-volume precision manufacturing
Move validated designs into repeatable small-batch production.
Industries
Precision Machining for Engineering Applications
Robotics
Joint components, brackets, end-effectors, precision pins and alignment parts.
Medical Devices
Fixture components, stainless parts, device housings and functional precision components.
Electronics
Sensor housings, heat sinks, connector components and precision enclosures.
DFM Guidance
Design Tips for Precision Machined Parts
For precision machined parts, successful manufacturing depends on clear functional requirements, realistic tolerance strategy, material stability, post-processing planning and inspection notes.
- Mark only functional and assembly-critical dimensions as tight tolerance.
- Define datum references clearly on the 2D drawing.
- Choose materials based on strength, stability, corrosion resistance and machinability.
- Avoid unnecessary thin walls that can deform during machining or finishing.
- Specify thread type, depth and tolerance clearly.
- Consider how anodizing, plating, passivation or polishing may affect dimensions.
- Mark features that require CMM, thread gauge or first article inspection.
For broader pricing factors, review CNC machining cost.
Your questions answered
Precision Machining FAQs
What is precision machining?
Precision machining is the manufacturing of custom parts with critical dimensions, tight tolerance features, datum requirements, functional fits or inspection requirements that affect part performance or assembly.
How is precision machining different from standard CNC machining?
Standard CNC machining focuses on producing parts from CAD files and drawings. Precision machining places more emphasis on critical dimensions, datum references, tolerance risk, inspection planning and functional part performance.
Can you machine tight tolerance parts?
Yes. Tight tolerance features can be reviewed based on part geometry, material, size, process, surface finish and inspection method. Please provide a 2D drawing for critical tolerances.
Can you inspect critical dimensions?
Yes. Critical dimensions, hole positions, threads, OD/ID, flatness, mating surfaces and datum relationships can be inspected based on project requirements.
Can you provide CMM inspection reports?
Yes. CMM inspection and dimensional inspection reports are available when required. Please mark the critical features on your drawing.
What materials can be used for precision machining?
Common materials include aluminum, stainless steel, brass, copper, titanium and engineering plastics such as PEEK, POM, nylon, ABS, PC and PTFE.
Can surface finishing affect precision machined parts?
Yes. Anodizing, plating, passivation, polishing and other finishes can affect surfaces, edges, threads or dimensions. Finishing requirements should be reviewed before machining.
Do I need a 2D drawing for precision machined parts?
A 3D CAD model is helpful for geometry, but a 2D drawing is strongly recommended for tight tolerances, datum references, threads, surface finish and inspection requirements.
Can you support both prototypes and low-volume precision parts?
Yes. Baosheng supports precision machined prototypes, engineering samples, pilot builds and low-volume production.
Can you sign an NDA before reviewing drawings?
Yes. NDA can be arranged before reviewing confidential CAD files and technical drawings.
Get a Quote for Precision Machined Parts
Upload CAD files and drawings with material, quantity, critical dimensions, tolerance, datum, surface finish and inspection requirements. Our engineers will review manufacturability, tolerance risks, machining process and inspection planning before quoting.
- NDA available before file review
- Tolerance and datum review
- Machining process recommendation
- CMM and inspection reports available
- Prototype to low-volume support
Visit us
308, Building A, Chang'an Zhigu, Annex Building, No. 199 Shajiang Road, Xitou Community, Songgang Street, Bao'an District, Shenzhen, Guangdong, China.
Email Us
in**@*********nd.com
Call Us/Whatsapp
+86 17727904392
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