Product Overview
Custom precision grinding parts engineered for tight-tolerance mechanical assemblies, high-load transmission systems, and critical mission equipment. We process high-hardness alloys, hardened steels, and engineering ceramics into complex cylindrical, flat, and internal geometries.
Backed by in-house high-rigidity CNC cylindrical grinders (such as Studer and Kellenberger platforms) and optical profile grinders, our manufacturing capability achieves dimensional tolerances down to ±0.001 mm and surface finishes up to Ra 0.1 um. Operating under an ISO 9001:2015 certified quality management system, our processes are designed to integrate seamlessly into Tier-1 industrial, automotive, and aerospace sub-assemblies.
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Technical Specifications
|
Parameter |
Specification Range |
|
Material |
Alloy Steel, Stainless Steel, Tool Steel, Titanium, Inconel, Ceramics, Brass |
|
Size Capacity |
Outer Diameter (OD): ø3 mm – ø300 mm; Length: Up to 800 mm |
|
Tolerance |
Up to ±0.001 mm (1 um) |
|
Machining Accuracy |
Cylindricity / Roundness / Flatness within 0.002 mm |
|
Surface Roughness |
Ra 0.1 um – Ra 0.8 um |
|
Processing Range |
External Grinding, Internal Grinding, Surface Grinding, Centerless Grinding |
|
Equipment / Process |
Studer/Kellenberger CNC Grinders, Mitsui Surface Grinders, Zeiss CMM Metrology |
Key Features
Sub-Micron Dimensional Accuracy
Maintains tight profile and diameter tolerances down to ±0.001 mm, eliminating assembly interference in high-speed rotating shafts and mating bores.
Burn-Free Grinding Control
Employs optimized wheel selection, high-pressure coolant-through systems, and controlled feed rates to prevent metallurgical thermal damage and micro-cracking.
Superior Surface Integrity
Achieves controlled surface finishes from Ra 0.1 um to Ra 0.8 um, effectively reducing friction and wear in high-load sliding and rotating components.
High Batch-to-Batch Repeatability
Achieves controlled surface finishes from Ra 0.1 um to Ra 0.8 um, effectively reducing friction and wear in high-load sliding and rotating components.
High Batch-to-Batch Repeatability
Utilizes automated in-process gauging and rigid machine thermal stabilization to ensure consistent dimensions across production runs from 50 to 10,000 units.
Hardened Material Machining
Directly grinds pre-hardened steels (HRC 58-65), tungsten carbides, and exotic superalloys without requiring post-heat-treatment distortion corrections.
Automotive: Fuel injection plungers, transmission shafts, steering rack components, and camshaft journals.
Medical Devices: Surgical instrument guides, orthopedic drill blanks, and pump rotors.
Aerospace: Actuator spools, valve sleeves, and hydraulic piston rods.
Automation & Robotics: Precision linear guide shafts, lead screw blanks, and bearing spacers.
Electronics & Semiconductor: Wafer handling pins, alignment bushings, and vacuum chamber spindles.
Industrial Equipment: High-speed spindle shafts, gear blanks, and cutter arbors.
Materials & Surface Finishes
Available Materials
Steels & Irons: 4140, 4340, 52100 Bearing Steel, 8620, D2, M2, H13 Tool Steel.
Stainless Steels: 304, 316L, 17-4PH, 420, 440C.
Superalloys & Non-Ferrous: Inconel 718, Titanium (Grade 5), Aluminum (6061-T6, 7075-T6), Phosphor Bronze.
Specialty: Zirconia & Alumina Ceramics, Tungsten Carbide.
Surface Finishes & Post-Processing
Passivation (ASTM A967 / QQ-P-35)
Hard Chrome Plating
Electroless Nickel Plating
Black Oxide
Heat Treatment Verification (Annealing, Quenching, Case Hardening up to HRC 62)
Drawing & CAD Review:
Accepts 2D drawings (PDF/DXF with GD&T) and 3D models (STEP/IGES/SolidWorks). DFM feedback and feasibility analysis provided within 24 hours.
Custom Dimensions:
Custom lengths, diameters, steps, and keyways manufactured strictly to print specifications.
Tolerance & GD&T Compliance:
Full support for geometric dimensioning and tolerancing (true position, parallelism, perpendicularity, runout).
Material Traceability:
Mill test certificates (MTR) provided upon request for raw material verification.
Flexible Volume Support:
Rapid prototyping for validation, scaling smoothly into medium-to-high volume production.
CMM Inspection: 3D coordinate measuring machines (Zeiss) with probing accuracy up to 0.5 um for complex spatial profiles.
Form Measurement: Dedicated roundness and cylindricity testers to verify concentricity, runout, and form errors.
Surface Roughness Testing: Contact profilometers to verify Ra and Rz values against engineering prints.
Dimensional Inspection: Micrometers, air gauges, and plug gauges calibrated under strict ISO standards.
Final Inspection: 100% critical dimension check or AQL-based sampling reports included with shipment.
Packaging & Delivery
Protective Packaging:
Individual VCI (Volatile Corrosion Inhibitor) anti-rust bagging, slotted plastic trays, and custom foam inserts to prevent transit damage.
Batch Identification:
Barcoded labels detailing part numbers, revision levels, heat numbers, and lot quantities.
Export Packaging:
Export-grade fumigation-free wooden crates or heavy-duty double-wall corrugated cartons.
Lead Time:
Standard production lead times range from 15 to 25 business days, depending on geometry complexity and material availability; expedited options available.
FAQ
Request a Quote
To receive a formal quotation within 24 hours, please submit your project requirements via email or our RFQ portal:
Part Drawing: 2D PDF with complete tolerances and GD&T callouts.
3D CAD File: STEP or IGES format.
Material Specifications: Exact alloy grade and heat treatment state.
Quantity: Prototype quantity and anticipated annual usage (AYU).
Special Requirements: Plating, inspection report level (e.g., PPAP, full CMM report), or target delivery date.
As one of the most professional precision grinding parts manufacturers and suppliers in China, we're featured by quality products and good price. If you're going to wholesale custom made precision grinding parts, welcome to get quotes from our factory. Also, OEM&ODM service is available.
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