Granite mechanical components are widely recognized as essential parts in precision machinery, thanks to their exceptional stability, wear resistance, and corrosion resistance. For global buyers and engineers seeking reliable granite machining solutions, understanding the core technical requirements is crucial to ensuring product performance and project success. Below, ZHHIMG—your trusted partner in high-precision granite components—details the must-follow technical standards for these critical parts.
1. Material Selection: The Foundation of Quality
High-performance granite mechanical components start with premium raw materials. We strictly adopt fine-grained, dense-structured rocks such as gabbro, diabase, and granite, with the following mandatory specifications:
- Biotite content ≤ 5%: Ensures low thermal expansion and high dimensional stability.
- Elastic modulus ≥ 0.6×10⁴ kg/cm²: Guarantees strong load-bearing capacity and resistance to deformation.
- Water absorption ≤ 0.25%: Prevents moisture-induced damage and maintains performance in humid environments.
- Workpiece surface hardness ≥ 70 HS: Delivers excellent wear resistance for long-term use in high-frequency operation scenarios.
2. Surface Roughness: Precision for Functional Surfaces
Surface finish directly impacts the component’s fit and performance in machinery. Our standards align with international precision requirements:
- Working surfaces: Surface roughness Ra ranges from 0.32 μm to 0.63 μm, ensuring smooth contact with mating parts and reducing friction.
- Side surfaces: Surface roughness Ra ≤ 10 μm, balancing precision and manufacturing efficiency for non-critical areas.
3. Flatness & Perpendicularity: Critical for Assembly Accuracy
To ensure seamless integration into your machinery, our granite components meet strict geometric tolerances:
- Flatness inspection: For all grades, we use either the diagonal method or grid method to test surface flatness. The allowable surface fluctuation follows the specifications in Table 2 (available upon request), ensuring no deviations that affect assembly or operation.
- Perpendicularity tolerance:
- Perpendicularity between side surfaces and working surfaces.
- Perpendicularity between two adjacent side surfaces.
Both comply with Grade 12 tolerances as specified in GB/T 1184 (equivalent to international standards), guaranteeing precise alignment during installation.
4. Defect Control: Zero Compromise on Performance
Any defect on critical surfaces can lead to machinery failure. We enforce strict defect standards for all granite components:
- Working surfaces: 严禁 (strictly prohibited) from having defects that affect appearance or performance, including sand holes, air bubbles, cracks, inclusions, shrinkage porosity, scratches, dents, or rust stains.
- Non-working surfaces: Minor depressions or corner chips are allowed only if they are professionally repaired and do not impact structural integrity or assembly.
5. Design Details: Tailored for Practical Use
We optimize component design to balance precision and usability, with grade-specific requirements:
- Handling handles: For Grade 000 and Grade 00 components (ultra-high precision), handles are not recommended. This avoids structural weakening or deformation that could compromise their ultra-tight tolerances.
- Threaded holes/grooves: For Grade 0 and Grade 1 components, if threaded holes or grooves are required on the working surface, their positions must be below the working surface level. This prevents interference with the component’s functional contact area.
Why Choose ZHHIMG’s Granite Mechanical Components?
Beyond meeting the above technical standards, ZHHIMG offers:
- Customization: Tailor components to your specific dimensions, tolerances, and application needs (e.g., CNC machine bases, precision measurement platforms).
- Global Compliance: All products meet ISO, GB, and DIN standards, ensuring compatibility with machinery worldwide.
- Quality Assurance: 100% inspection before shipment, with detailed test reports provided for every order.
If you’re looking for high-precision granite mechanical components that meet strict technical requirements and deliver long-term reliability, contact our team today. We’ll provide personalized solutions, free samples, and a quick quote to support your project.
Post time: Aug-27-2025