Process 01
Cylindrical grinding
- Part profile
- Precision shafts, bearing seats and rotational outside diameters
- Control focus
- Roundness, coaxiality, diameter and continuous surface finish
CNC Grinding
Precision CNC Grinding Services | Custom Ground Components Manufacturer
We provide professional CNC grinding services including cylindrical grinding, surface grinding and precision internal grinding. Equipped with high-precision grinding machines and in-house surface finishing workshop, we deliver ultra-smooth customized grinding components from trial production to batch manufacturing.
Process video
Prototype to production
We are trusted bypartners like
Parts
Representative CNC machined parts we support
Zhonghanda reviews substrate, critical dimensions, appearance needs and finishing requirements together so material selection supports the final application.
01 / 04
Stainless Steel
Stainless Steel
Grinding support for tight size control and smoother functional surfaces
Request a Quote130+
Machine capacity
24H
Engineering response
F.A.I.
First article inspection
99.2%
Quality acceptance
GRINDING / SERVICE
Service Overview
Abrasive contact laboratory
Wheel conditionContact zoneGround result
Select the grinding contact
Cylindrical grinding
- Part profile
- Precision shafts, bearing seats and rotational outside diameters
- Control focus
- Roundness, coaxiality, diameter and continuous surface finish
G01Cylindrical & Surface & Internal hole precision grinding
G02Ultra-smooth mirror surface and strict flatness control
G03Hardened steel & brittle metal precision processing
G04Low MOQ trial order & stable mass grinding production
G05Complete in-house post-grinding surface treatment
We provide professional CNC grinding services including cylindrical grinding, surface grinding and precision internal grinding. Equipped with high-precision grinding machines and in-house surface finishing workshop, we deliver ultra-smooth customized grinding components from trial production to batch manufacturing.
We specialize in ultra-precision grinding processing for high-hardness workpieces. Combining cylindrical grinding, surface grinding and internal hole grinding technology, we manufacture hardened steel parts, precision grinding shafts and flat mold components with ultra-low roughness and perfect dimensional consistency.
CNC / GRINDING
Our Grinding Capabilities
Process 02
Surface grinding
- Part profile
- Mold plates, inserts, datum faces and flat structural components
- Control focus
- Flatness, parallelism, thickness and uniform face texture
Process 03
Internal grinding
- Part profile
- Bores, sleeves, sealing diameters and precision internal fits
- Control focus
- Bore size, cylindricity, internal finish and concentric relationships
Machining Type
Cylindrical Grinding, Surface Grinding, Internal Grinding
Tolerance Range
±0.002mm ~ ±0.05mm
Processing Size
3mm — 300mm
Surface Roughness
Ra 0.02μm — Ra 0.8μm
Acceptable Files
STEP, IGES, DXF, DWG, PDF
Lead Time
3–5 days for prototypes, 10–15 days for mass production
WHAT / IS
What is grinding?
Micron-scale abrasive contact
As an ultra-precision finishing process complementary to turning and milling, CNC grinding removes micro material residuals through high-speed abrasive grinding wheels. It specializes in processing hardened steel and high-hardness alloys that conventional CNC machining cannot handle, delivering burr-free, ultra-flat, mirror-smooth surfaces with minimal roughness. Covering cylindrical, surface and internal grinding, it ensures high dimensional accuracy and zero deformation for precision shafts, mold components and sealing parts, serving as an essential finishing solution for high-precision industrial machinery.
Remove controlled micro material
The abrasive contact zone removes small residual material while limiting heat, vibration and deformation.
GRINDING / METAL
Metal Materials
High-hardness metal materials for custom grinded parts, including carbon steel, alloy steel, hardened steel, stainless steel, brass and aluminum alloy.
Wheel / material pairing
Selected grinding material
Carbon steel
Moderate hardness, excellent grindability, good dimensional stability and high cost performance
Common Grades
1018, 1045, A3, Q235, S45C
GRINDING / SPECIAL
Special Materials
High-rigidity and wear-resistant raw materials suitable for precision grinding, including bearing steel, tungsten steel and other custom alloy materials.
Material 01
Bearing steel
Machinability & Performance
High rigidity, superior wear resistance and dimensional stability, ideal for precision shaft grinding
Common Grades
GCr15, SUJ2, 52100
Material 02
Tungsten steel (Carbide)
Machinability & Performance
Ultra-high hardness and compression resistance, low deformation during fine grinding, hard to process
Common Grades
YG8, YG6, WC-Co
Material 03
Custom alloy steel
Machinability & Performance
Tailored composition, balanced rigidity and toughness, stable surface quality after grinding
Common Grades
42CrMo, 30CrMnSi, 45CrNiMoVA
Component families
Industry Application
Our custom CNC grinded parts are widely adopted in ultra-precision industrial fields
Selected component family
Precision Locating Shafts
High-precision locating shafts for automated machinery and robotic systems.
Select an industry scenario to review the matching application context.
Discuss a Precision Grinding Application
GRINDING / PROCESS
ZHD Precision Working Process
A controlled production workflow for Precision CNC Grinding Services | Custom Ground Components Manufacturer, from engineering review and task preparation to final inspection and delivery.
Grinding traveler
The finished surface is planned before the wheel touches the part.
Active gate 1 of 6
Production Task
Confirm the Precision CNC Grinding Services | Custom Ground Components Manufacturer requirements, review drawings, prepare inspection tools and arrange the required materials before production starts.
WHY / CHOOSE
Why Choose Our CNC Grinding Service
Tolerance
±0.002mm ~ ±0.05mm
Surface roughness
Ra 0.02μm — Ra 0.8μm
Process
Cylindrical Grinding, Surface Grinding, Internal Grinding
C01
Multi-type grinding capability
Support cylindrical, surface and internal hole grinding for diversified precision requirements.
C02
Ultra-high precision control
Superfine surface roughness and tight tolerance meet ultra-precision industrial standards.
C03
Hardened steel processing
Effectively machine quenched and high-hardness steel parts that cannot be cut by ordinary CNC tools.
C04
Stable batch consistency
Uniform surface finish and precise dimension repetition for mass grinding orders.
C05
Strict quality inspection
High-precision measuring instruments provide flatness, roughness and dimensional inspection reports.
Precision CNC Grinding Services | Custom Ground Components Manufacturer Articles
Read recent technical articles related to this service before preparing your RFQ.
cnc
CNC for Complex Metal Housings: What Buyers Should Know
1. Why CNC matters for complex metal housings 2. What the part tells you about the manufacturing route 3. Key features buyers should evaluate 4. Why cast-and-machined aluminum is so common 5. Selection criteria that actually help 6. Practical buyer cautions 7. What to ask before you place an order 8. Next step
ZHONG HAN DAJul 01, 2026
cnc
CNC Machining for Cast Aluminum Housings: What Buyers Should Check
1. Why CNC machining matters for cast aluminum housings 2. What this kind of part is designed to do 3. Why high-pressure die casting is often paired with CNC machining 4. Key features buyers should evaluate 5. Common mistakes when sourcing this type of housing 6. What to ask a supplier before ordering 7. How this connects to real buyer decisions 8. FAQ: quick buyer questions 9. Next step
ZHONG HAN DAJul 01, 2026
cnc
CNC Machining for Complex Cast Housing Parts
1. Why CNC machining matters on a complex cast housing 2. What buyers should look for first 3. How the casting and machining stages work together 4. Common sourcing mistakes with machined cast housings 5. Practical selection advice for engineering and procurement teams 6. FAQ: a few questions buyers usually ask 7. What to do next
ZHONG HAN DAJul 01, 2026
cnc
CNC Machining for Cast Industrial Housings: What Buyers Should Check
1. Why CNC matters on cast housings and functional bodies 2. What this type of part is trying to achieve 3. Quick buyer takeaway: what to check before you approve the part 4. Why cnc machining is the critical step 5. Design and sourcing criteria that matter most 6. Common mistakes buyers still make 7. Practical questions to ask a supplier 8. Next step
ZHONG HAN DAJul 01, 2026
What is CNC grinding used for?
CNC grinding is designed for ultra-precision parts requiring extremely smooth surface and strict tolerance, widely used for hardened steel shafts, mold plates and precision mechanical fittings.
What is the difference between grinding and milling?
Grinding achieves much lower roughness and tighter tolerance. It is more suitable for hardened workpieces which cannot be processed by conventional milling and turning.
Can you grind hardened steel?
Yes. We specialize in quenched steel, bearing steel and high-hardness alloy steel precision grinding with stable surface flatness.
What materials are suitable for grinding?
Hardened steel, carbon steel, alloy steel, stainless steel, brass and other high-rigidity metal materials.
Do grinded parts need surface treatment?
Reasonable surface finishing such as passivation and electroplating can further improve hardness, smoothness and service life.
What is your tightest grinding tolerance?
The strictest tolerance can reach ±0.002mm for ultra-precision industrial grinding components.
Can you achieve mirror surface effect?
Absolutely. We provide super polishing treatment to obtain optical-grade mirror surface after precision grinding.
Can you support large batch grinding?
Yes. We maintain stable batch production consistency to meet high-volume requirements for precision ground parts.
How about your delivery cycle?
Prototype orders take 3-5 working days, and mass production takes 10-15 working days depending on complexity.
Ready to manufacture
Send your CAD drawings to get reliable custom CNC grinding solutions and precise quotations.
Benefiting from our in-house metal surface treatment workshop, free DFM analysis and professional technical consultation are available for every ultra-precision industrial project.