Precision CNC Grinding Service for Tight-Tolerance Components
High-accuracy grinding solutions for hardened steel parts, shafts, tooling components, flat surfaces and precision OEM applications.
When Machining Accuracy Requires A Finishing Process
Grinding is typically used as a finishing process after CNC milling, turning or heat treatment.
It is selected when parts require:
Precision Grinding Capabilities
Surface Grinding
For flat surfaces requiring excellent flatness and surface finish.
Cylindrical Grinding
For shafts, sleeves and rotational components.
Internal Grinding
For bores and internal diameters.
Tool Grinding
For tooling and precision wear components.
Finish Grinding
For final dimensional correction after machining.
Typical Ground Components
Materials Suitable For Precision Grinding
| Tool Steel | D2 | SKD11 | H13 |
|---|---|---|---|
| Carbon Steel | Alloy Steel | 4140 | 4340 |
| Stainless Steel | 304 | 316 | 17-4PH |
| Carbide | Hardened Components | Heat-Treated Parts | |
Grinding Capability
Processes
Surface Grinding
Cylindrical Grinding
Internal Grinding
Applications
Precision Shafts
Tooling Components
Flat Surfaces
Hardened Parts
Materials
Steel
Stainless Steel
Carbide
Heat-Treated Components
Production
Prototype
Low Volume
Mass Production
Inspection
FAI
CMM
Final Inspection
Files
STEP
STP
IGES
DWG
PDF
Why Grinding Is Often The Final Manufacturing Step
| Feature | Grinding | CNC Milling |
|---|---|---|
| Surface Finish | Excellent | Good |
| Dimensional Accuracy | Excellent | Good |
| Hardened Steel | Excellent | Limited |
| Material Removal Rate | Lower | Higher |
| Final Finishing | Excellent | Moderate |
CNC milling removes material efficiently, while grinding is typically used to achieve final dimensional accuracy and surface quality.
Engineering Support Before Production
Inspection-Controlled Precision Grinding
Material Verification
First Article Inspection
In-Process Inspection
CMM Inspection
Surface Finish Verification
Final Inspection
Industries Using Precision Ground Components
Grinding Project Examples
Precision Shaft
- Material
- 4140 Steel
- Challenge
- Concentricity and surface finish requirements
- Solution
- Turning + Cylindrical Grinding
- Result
- Improved rotational performance
Tooling Plate
- Material
- SKD11
- Challenge
- Flatness requirement after heat treatment
- Solution
- Surface Grinding
- Result
- Stable dimensional control
Industrial Bushing
- Material
- Hardened Steel
- Challenge
- Final bore accuracy
- Solution
- Grinding + Inspection
- Result
- Improved assembly consistency
Precision Grinding FAQ
Common questions for buyers reviewing precision grinding, hardened components and tight tolerance machining projects.
Process And Materials
What is CNC grinding?+
CNC grinding is a precision finishing process that uses abrasive wheels to improve dimensional accuracy, surface finish, flatness, roundness or concentricity.
When should grinding be used instead of milling?+
Grinding is used when parts need tighter tolerances, finer surface finish, better flatness or accurate finishing after heat treatment.
Can grinding machine hardened steel?+
Yes. Grinding is suitable for hardened steel, tool steel, heat-treated components, carbide and other materials that require final precision finishing.
What surface finish can grinding achieve?+
Surface finish depends on material, geometry, grinding method and drawing requirements. Our engineering team reviews each requirement before production.
Project Review
Can you grind shafts and bushings?+
Yes. We support precision grinding for shafts, bushings, sleeves, rollers and other cylindrical or wear components.
Do you provide inspection reports?+
Yes. Inspection can include material verification, first article inspection, in-process inspection, CMM inspection, surface finish verification and final inspection records.
What CAD formats do you accept?+
We can review STEP, STP, IGES, DWG and PDF files, along with material, heat treatment, tolerance and surface finish requirements.
Can you support prototype production?+
Yes. Ningbo Feiyu supports prototype, low-volume and production grinding projects after drawing review and manufacturing route planning.
Send Your Precision Grinding Drawings For Review
Upload your CAD files, material specifications, heat treatment information and tolerance requirements.
Our engineering team will review your project and recommend the most suitable manufacturing route.