CNC Grinding Services

We offer high-precision CNC grinding with exceptional surface finishes for metals, ceramics, and plastics,alloys. From tight tolerances to precision finishes, our grinding solutions are built to exceed industry standards—supporting everything from rapid prototyping to low- and high-volume production. Contact us now for a free.

One-Stop CNC Grinding Solutions

We provide high-precision CNC grinding services with tolerances down to ±0.00005″ and surface finishes approaching mirror quality. Our capabilities include cylindrical (OD up to 13″, 69″ between centers), internal (ID 0.25″–10″), and surface grinding, handling straight, tapered, and complex geometries with ±0.0001″ accuracy.We grind alloy steels, hardened superalloys, duplex stainless steel, high-nickel alloys, bronze, ceramics, and engineering plastics—ideal for aerospace, medical, automotive, and electronics applications. Advanced CAD programming ensures repeatability and consistency across prototypes and production runs.ISO 9001 certified, we use CMM inspection, profilometers, and precision measurement systems to guarantee dimensional and geometric accuracy. Beyond grinding, we offer polishing, heat treatment, plating, coating, and dynamic balancing for complete, production-ready parts.From micro ultra-precision components to large industrial parts, we deliver tight tolerances, flawless finishes, and dependable quality—all in one place.

What is CNC Grinding?

CNC grinding is a precision machining process that combines computer numerical control (CNC) with advanced grinding techniques to achieve high-accuracy shaping and finishing of parts. Using CNC systems to guide the grinding wheel, material is removed precisely from metals, ceramics, plastics, and composite materials, ensuring consistent tolerances and superior surface quality. This process supports a variety of operations, from surface and flat grinding to cylindrical and complex profile grinding, each requiring specific machine setups and programming. As a critical part of modern CNC machining, CNC grinding delivers repeatable results, high efficiency, and the precision needed for demanding industries like aerospace, medical, and automotive.

Advantages of CNC Grinding

Sub-Micron Precision:Holds dimensional and flatness tolerances up to ±0.0005 mm
Mirror Finishing:Achieves surface roughness down to Ra 0.05 μm for ultra-low friction surfaces
High Hardness Capability (up to 70 HRC):Stable machining of tungsten carbide, Inconel, and hardened steels
Geometric Fidelity:Maintains strict GD&T control, including concentricity within 0.003 mm

XTPROTO Precision CNC Grinding Services

XTPROTO’s precision grinding experts select the optimal CNC method for each part, delivering ultra-tight tolerances, mirror-quality finishes, and exact compliance with your specifications. Engineered for aerospace, automotive, medical, and industrial applications, our high-precision grinding solutions provide consistent, production-ready results with fast turnaround and one-stop manufacturing convenience.

Cylindrical / OD Grinding

Our team precisely grinds the outer surfaces of parts, including straight, tapered, and complex curves, ensuring tight diameters and cylindricity for aerospace, automotive, and industrial components.

Surface Grinding

Flat surface finishing, including precision and superfinishing, delivering high flatness and mirror-like surface quality for molds and mechanical parts.

Internal / ID Grinding

High-precision internal grinding for holes and bores, including fine bore finishing, ensuring exact fit, superior performance, and compliance with your specifications.

Centerless Grinding

Efficient batch processing of slender parts, maintaining roundness and consistent dimensions, ideal for micro components and high-volume production.

Polishing / Finishing

Removes minor defects and creates mirror-quality surfaces, improving both the appearance and durability of your parts.

Profile Grinding

Grinding complex curves or geometric profiles, including surface and mold profile grinding, to reproduce intricate shapes with high accuracy.

Honing / Superfinishing

Enhances internal bore accuracy and surface smoothness, ideal for precision fittings and high-performance mechanical components.

Deep Hole Grinding

Precision grinding for deep or high-aspect-ratio holes, including long bore processing, ensuring diameter accuracy and straightness for hydraulic, mold, and aerospace parts.

Micro / Precision Hole Grinding

Specialized grinding for micro parts and ultra-fine holes, down to 0.1mm, ensuring extreme accuracy and repeatability for high-precision applications.

CNC Grinding Capabilities

XTPROTO addresses high-difficulty finishing challenges with advanced CNC precision grinding, holding tolerances as tight as ±0.001 mm and surface finishes down to 0.005 Ra. Utilizing ID/OD grinding, surface grinding, and centerless grinding, we seamlessly process hard materials including titanium, stainless steel, tool steels, technical ceramics, and engineering plastics. Our precision grinding systems accommodate component diameters from 0.1 mm to 300 mm and lengths up to 1200 mm, ensuring absolute control over roundness, cylindricity, and concentricity. From prototyping to volume production, our multi-axis grinding capabilities deliver the fast, repeatable, and spec-compliant accuracy demanded by critical aerospace, medical, and industrial applications.

Sub-Micron Precision CNC Grinding

Achieving sub-micron precision on hardened materials often leads to thermal distortion or surface micro-cracking when using conventional machining, resulting in compromised part integrity and assembly failure. XTPROTO eliminates these risks by utilizing high-precision CNC grinding centers capable of maintaining absolute dimensional stability on materials up to 70 HRC, including Tungsten Carbide and Inconel. By leveraging automated thermal compensation and laser-monitored grinding cycles, we provide our clients with an exceptional linear accuracy of ±0.002 mm and mirror-like finishes as low as 180°C Ra 0.1, ensuring that your most critical high-speed rotating components and sealing surfaces perform with zero-friction reliability and perfect geometric alignment.

High-Hardness Material & Sub-Micron Precision

Conventional machining of materials up to 70 HRC—such as Tungsten Carbide, Inconel, and hardened tool steels—frequently induces micro-cracking, thermal distortion, and tool deflection. XTPROTO eliminates these structural risks. By deploying multi-axis CNC grinding centers equipped with automated thermal compensation and real-time laser-monitored probing, we control the thermal envelope during high-feed abrasives. We deliver an exceptional linear accuracy of ±0.001 mm and mirror-like surface finishes down to Ra 0.05 μm, guaranteeing zero-stress material removal and perfect geometric alignment for high-stress applications.

Precision GD&T Control in CNC Grinding

Maintaining tight geometric relationships like concentricity, runout, and parallelism is critical for high-speed rotating components like aerospace turbines and medical device shafts. XTPROTO achieves a concentricity of 0.003 mmand parallelism within 0.005 mm through single-setup multi-surface processing. Our controlled grinding loops prevent thermal damage and tensile residual stresses, eliminating the micro-imperfections that trigger premature fatigue failure, ensuring reliable high-pressure sealing and friction-free mechanical motion.

Superior Surface Integrity & Finish

Standard machining processes often leave tool marks and surface stress that increase friction and compromise the long-term sealing performance of critical industrial components. XTPROTO eliminates these surface imperfections by employing advanced abrasive technology to achieve mirror-like finishes as low as Ra 0.1–0.4 μm. Our controlled grinding process ensures zero-stress material removal, preventing the micro-cracks and thermal damage that typically lead to fatigue failure. By providing this superior surface integrity, we enable our clients to maximize the lifespan and efficiency of their high-friction parts, resulting in smoother operation and reliable high-pressure sealing.

Why Work With XTPROTO？

Our CNC grinding services combine advanced machines with deep machining expertise to give you precision you can trust. We deliver tight tolerances, consistent quality, and excellent surface finishes on complex parts for a wide range of industries, from aerospace to medical and defense. With automated processes, strict inspections, and a focus on repeatability, we ensure every part meets your specifications without compromise. We handle materials from hardened steels to ceramics, support custom and high‑mix requirements, and streamline your production with reliable delivery and responsive communication. Partnering with us means getting dependable, high‑precision results and service that helps you move projects forward with confidence.

XTPROTO CNC Grinding Facility

XTPROTO’s advanced manufacturing facility combines over 20 years of precision engineering expertise with an elite production infrastructure to handle your most demanding grinding projects. Equipped with an extensive fleet of high-precision CNC centerless, cylindrical, surface, and ID/OD grinding centers, our shop floor is optimized for both rapid-turn prototyping and high-volume production. We maintain rigorous temperature-controlled environments to eliminate material thermal expansion, ensuring that our micro-to-large part grinding (0.1 mm to 300 mm, lengths up to 1200 mm) achieves consistent ±0.001 mm tolerances. Backed by fully integrated pre-grinding CNC machining lines, real-time in-process gauging, and a streamlined supply chain, XTPROTO guarantees uncompromising quality, zero-defect component execution, and reliable on-time delivery across global schedules.

Our Commitment To Quality

At XTPROTO, precision and consistency are the cornerstones of everything we do. From custom component design and prototyping to CNC grinding and milling, we ensure every part meets tight geometric tolerances and achieves superior surface finishes. Adhering to ISO 9001:2015 standards, we conduct multi-step inspections throughout production to guarantee zero-defect shipments. Our quality assurance process includes using 3D Coordinate Measuring Machines (CMMs) for exact dimensions, along with both automated and manual checks for each component.

We also maintain full material certification and traceability, backed by statistical process control. Our extensive range of measurement tools—including optical profilometers, micrometers, calipers, height gauges, depth indicators, bore gauges, squares, granite plates, and rotary tables—ensures every part is inspected to the highest standards. Whether it’s complex joints or high-precision aerospace, medical, or automotive parts, XTPROTO delivers reliability, precision, and on-time delivery every time.

120+ Elite Engineers for Precision Grinding

Maintaining sub-micron consistency across large-scale production runs is often compromised by thermal drift and wheel wear, leading to dimensional instability in hardened components. XTPROTO’s engineering team of over 120 specialists eliminates these variables through advanced kinematic simulation and custom thermal compensation algorithms. Our experts specialize in precision abrasive dressing and rigid workholding design to ensure stress-free material removal for components up to 70 HRC. By integrating real-time laser probing with rigorous CMM verification, we provide our clients with absolute geometric fidelity and a ±0.002 mm linear accuracy, ensuring that even the most complex internal and external grinding projects are delivered with 100% repeatability.

CNC Grinding Tolerances

Max Envelope:2000 × 800 × 600 mm (80″ × 32″ × 25″)
Standard Tolerance:±0.001 mm (±0.00004″)
Precision Limit:±0.0005 mm (±0.00002″)
Surface Finish (Ra):Down to 0.05 μm (0.1–0.2 μm standard)
Materials:Hardened alloys, tool steels, metals, and ceramics
Edge Finish:Light deburring as standard
Lead Time:depending on complexity and volume

Precision Cylindrical Grinding Materials

At XTPROTO, we provide high-precision cylindrical grinding for prototypes, small batches, and large-scale production. Our experts select the right material for your application, ensuring tight tolerances and excellent surface finishes across a wide range of hardnesses and types.

Metals

Carbon Steel
Alloy Steel
Tool Steel
Stainless Steel (304 / 316 / 17-4PH)
Aluminum
Copper
Brass
Bronze
Nickel
Titanium

Plastics

PEEK
PTFE
PVC
PC
ABS
Natural Rubber
Silicone
UHMW-PE
Nylon (PA)
POM (Delrin)

Others

Aluminum Oxide
Silicon Nitride
Advanced Composites
Carbon Fiber
Glass Fiber
G10 / FR4
Ceramic Materials
Fiberglass
Graphite
Phenolic Materials

CNC Grinding Surface Finishing

At XTPROTO, our precision CNC ground parts can receive advanced surface finishing to meet tight tolerances, smooth finishes, and functional requirements — from prototypes to full production.

As-Machined

Standard precision-ground finish with tight tolerances and consistent surface quality.

Polishing

Creates ultra-smooth or mirror-like surfaces for improved appearance and reduced friction.

Anodizing / Plating / Coating

Enhances corrosion resistance, wear protection, and surface hardness with functional coatings.

Black Oxide / Chemical Finishing

Produces durable low-reflection surfaces while maintaining dimensional stability.

Sand / Abrasive Blasting

Creates uniform matte or textured finishes for functional or cosmetic applications.

Deburring & Cleaning

Removes sharp edges, burrs, and machining residue for assembly-ready parts.

Heat Treatment / Hardening

Improves material strength, hardness, and long-term wear resistance.

Dimensional Inspection

Full inspection support using CMMs, profilometers, calipers, gauge blocks, and precision metrology equipment.

CNC Grinding Parts We Machined

Industries Using CNC Grinding

Electronics

Industrial Equipment

Robotic

Aerospace

Medical

Defense and Military

Ready to Take Your Project to the Next Level?

Discover precision, efficiency, and quality like never before. Our solutions are tailored to meet your unique needs and help you achieve outstanding results.

Other Related CNC Machining Services

CNC Machining

CNC Milling

CNC Turning

Swiss Machining

CNC Routing

CNC Drilling

FAQs:CNC Grinding

How does XTPROTO prevent thermal damage and micro-cracking when grinding hard alloys like Tungsten Carbide?

High-hardness materials up to 70 HRC are prone to grinding burns and micro-cracking due to heat buildup. We prevent this by using customized vitrified diamond and CBN (Cubic Boron Nitride) wheels combined with high-pressure flood cooling, ensuring continuous lubrication at the cutting zone and stable thermal control throughout the process.

Can your CNC grinding services process non-conductive technical ceramics?

Yes. Unlike EDM, our grinding process handles non-conductive ceramics such as Aluminum Oxide (Al₂O₃) and Silicon Nitride (Si₃N₄). We use ultra-hard diamond abrasives and controlled feed strategies to avoid edge chipping and maintain precise, smooth surface finishes.

How do you maintain tight cylindricity and concentricity on long, slender shafts?

We use precision centerless grinding or cylindrical grinding with hydraulic follow-rests to minimize deflection. This setup ensures stability under cutting forces, maintaining roundness, straightness, and concentricity down to 0.003 mm over lengths up to 1200 mm.

How do you prevent distortion in thin-walled or delicate components?

We design custom low-force fixtures such as vacuum systems or magnetic chucks to reduce clamping stress. Operations are also split into roughing and finishing stages, allowing stress relief between passes to preserve flatness and geometric accuracy.

Request Your Free CNC Grinding Quote Today

After receiving your drawings, our engineers will analyze your custom CNC grinding parts right away. We actively work with you to clarify all details before providing a quote that is both economical and accurate.