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CNC Machining Services
Our fine CNC grinding machines and skilled technicians ensure that every part we produce has an excellent surface finish and strict tolerances.
Surface Grinding is used to machining parts with smooth, flat surfaces. A rotating grinding wheel grinds the surface of the parts to remove material and achieve precise finishes. This method is typically used to manufacture parts with tight tolerances and flat surfaces.
Cylindrical grinding involves grinding cylindrical or rod-shaped parts to achieve precise dimensions and surface finishes. In cylindrical grinding, the part involved is rotated at a specified diameter while the grinding wheel is moved along its length, removing material to form a cylinder.
CNC grinding excels in subtractive manufacturing with unmatched accuracy, repeatability, and surface finish, ensuring consistent excellence for high-performance components across various industries. CNC grinding offers micron-level precision, repeatable quality, and versatile capabilities, crucial for part performance and production success.
Attains tight tolerances down to ±0.001 mm, meeting critical application requirements through advanced multi-axis control and in-process gauging.
Ensures each workpiece maintains the same quality level, from the first to the thousandth, reducing waste and rework.
Delivers mirror-like finishes as fine as Ra 0.2 μm, ideal for components requiring low friction, high sealing performance, or tight mating interfaces.
Adapts to complex geometries and hard-to-machine materials, including tool steels, ceramics, and superalloys.
Compatible with turning, milling, and EDM, serving as a final precision step or an intermediate operation in hybrid manufacturing.
Essential in aerospace, medical, optical, and defense sectors, meeting the strictest standards for accuracy and reliability.
Our CNC grinding processes ensure tight tolerances on key part features, maintaining dimensional integrity and superior fit for assemblies.
| Feature | Standard Tolerance | Tightest Achievable Tolerance |
| Outer Diameter (OD) | ±0.005 mm | ±0.001 mm |
| Inner Diameter (ID) | ±0.005 mm | ±0.001 mm |
| Flatness | 0.01 mm | 0.002 mm |
| Parallelism | 0.01 mm | 0.003 mm |
| Cylindricity | 0.005 mm | 0.002 mm |
| Roundness | 0.003 mm | 0.001 mm |
| Surface Finish (Ra) | ≤ 0.8 μm | ≤ 0.2 μm |
| Length (up to 100 mm) | ±0.01 mm | ±0.005 mm |
| Angle Tolerance | ±0.1° | ±0.01° |
For CNC grinding processes, FastPreci typically works to tighter tolerances than ISO 2768, depending on the material and application requirements. While ISO 2768-m or f may be used for non-critical dimensions, we commonly apply custom precision tolerances for ground surfaces to meet high-accuracy demands.
FastPreci’s CNC grinding services deliver ultra-fine surface finishes, exceptional dimensional accuracy, and tight geometric control for parts that demand high precision. Using advanced grinding equipment and process controls, we support prototype and production requirements across demanding engineering industries.
Grinding is key for robotic motion parts where exceptionally smooth surfaces and consistent profiles reduce wear and enable precise movement. High-accuracy grinding provides surfaces that mating parts can repeatably engage.
Robot joint pins, Servo motor shafts, End-effector parts, Precision gear blanks
CNC grinding is pivotal in the fabrication of medical devices, where it facilitates the creation of ultra-precise, biocompatible components. This process guarantees adherence to stringent tolerances and delivers impeccable surface finishes, thereby satisfying both regulatory stipulations and functional imperatives.
Surgical tool components, Orthopedic pins and rods, Implant-grade shafts, Valve seats
Aerospace parts often require both strict geometric tolerances and high surface integrity for fatigue resistance, sealing, and fit. CNC grinding ensures that critical bearings and shaft surfaces meet aerospace precision standards.
Bearing journals, Ground shafts, Spindle surfaces, Landing gear interfaces
Exceptional roundness and straightness control
High surface quality to reduce fatigue stress
Reliable performance from prototype to small batches
CNC grinding is particularly adept at producing high-precision metal components with cosmetic-grade finishes, making it an excellent choice for smartphones, laptops, and other high-end electronics. This method is not only ideal for crafting functional parts but also ensures they meet stringent aesthetic standards.
Camera housings, Button shafts, Connector sleeves, Heat dissipation components
CNC grinding ensures components used in automated systems maintain consistent motion, low friction, and tight fits required for repeatability and uptime. Its ability to deliver fine surface quality makes it ideal for precision automation hardware.
Guide rails, Linear bearing shafts, Precision spacers, Wear-resistant bushings
Renewable systems need parts with surfaces and fits that promote durability and reduce energy loss. CNC grinding delivers the tight dimensional control and finish required for components that operate in demanding conditions
Battery mold inserts, Rotor shafts, Fuel cell plate blanks, Motor end caps
Semiconductor equipment components often require nano-level surface finishes and geometric precision, especially where vacuum sealing, motion, or sensor alignment is involved. CNC grinding excels in controlling these parameters.
Vacuum sealing surfaces, Precision guide rods, Ground fixture plates, Actuator journals
Ultra-fine surface finish for sealing and motion
Stable geometry for high-accuracy assemblies
Ideal for prototype and low-volume production
CNC grinding is essential in automotive parts where precision surface finish and controlled geometry reduce friction, improve fit, and extend service intervals. Turned and ground components are abundant in drivetrains and control systems.
Crankshaft journals, Precision rocker shafts, Ground transmission pins, Bearing surfaces
Tight tolerances for durable assemblies
High surface integrity for wear resistance
Flexible for prototyping and production volumes
We are committed to upholding the highest industry standards. To ensure quality and excellence, we have proactively obtained renowned certifications from trusted organizations.
Lead time as fast as 3 days, accelerating your R&D and production progress, easily meet tight deadlines.
Tolerances as tight as 0.005mm, rich experience with advanced 5-axis CNC machines, mill-turn machines, and precision grinding machines, meets a variety of tolerance requirements.
According to your functionality and quantity requirements, develop the optimal manufacturing process, combined with efficient self-owned factories to achieve optimal performance and cost.
From CNC machining to aluminum extrusion and heat treatment to surface finishing, from prototyping to mass production, easily and efficiently customize various parts.
ISO 9001 quality management system certification, equipped with various quality inspection instruments including Zeiss coordinate, process and results can be controlled.
Our engineers collaborate from the start — optimizing designs for manufacturability, improving strength-to-weight ratios, and reducing cost through smarter machining strategies.
