Selection Considerations
When selecting a granite platform, you should adhere to the principles of “accuracy matching the application, size adapting to the workpiece, and certification ensuring compliance.” The following explains the key selection criteria from three core perspectives:
Accuracy Level: Scenario-Specific Matching for Labs and Workshops
Different accuracy levels correspond to different application scenarios, and selection should be based on the precision requirements of the operating environment:
Laboratories/Quality Inspection Rooms: Recommended grades are Class 00 (ultra-precision operation) or Class AA (0.005 mm accuracy). These are suitable for ultra-precision applications such as metrology calibration and optical inspection, such as reference platforms for coordinate measuring machines (CMMs).
Workshops/Production Sites: Selecting Class 0 or Class B (0.025 mm accuracy) can meet general workpiece inspection needs, such as dimensional verification of CNC machined parts, while balancing durability and cost-effectiveness. Sizes: From Standard to Customized Space Planning
The platform size must meet both workpiece placement and operating space requirements:
Basic Formula: The platform area should be 20% larger than the largest workpiece being inspected, allowing for margin clearance. For example, to inspect a 500×600 mm workpiece, a size of 600×720 mm or larger is recommended.
Common Sizes: Standard sizes range from 300×200×60 mm (small) to 48×96×10 inches (large). Custom sizes from 400×400 mm to 6000×3000 mm are available for special applications.
Additional Features: Choose from T-slots, threaded holes, or edge designs (such as 0-ledge and 4-ledge) to enhance fixture installation flexibility.
Certification and Compliance: Dual Assurance of Export and Quality
Core Certification: Exports to European and American markets require suppliers to provide a long-form ISO 17025 certificate, including calibration data, uncertainty, and other key parameters, to avoid customs clearance delays due to incomplete documentation. Supplementary Standards: For basic quality, refer to standards such as DIN 876 and JIS to ensure that flatness tolerances (e.g., Grade 00 ±0.000075 inches) and material density (black granite is preferred for its dense structure and resistance to deformation) meet standards.
Selection Quick Reference
High-precision laboratory applications: Grade 00/AA + 20% larger than the workpiece + ISO 17025 certificate
Routine workshop testing: Grade 0/B + standard dimensions (e.g., 48×60 inches) + DIN/JIS compliance
Exporting to Europe and the United States: A long-form ISO 17025 certificate is mandatory to avoid customs clearance risks
Through precise matching, scientific dimensional calculations, and rigorous verification and certification, we ensure that granite platforms meet both production needs and global supply chain compliance standards.
Maintenance and Calibration Recommendations
The precision performance of granite platforms depends on a scientific maintenance and calibration system. The following provides professional guidance from three perspectives: daily use, long-term storage, and accuracy assurance, to ensure the continued reliability of the measurement base.
Daily Maintenance: Cleaning and Protection Key Points
Cleaning procedures are the foundation of maintaining accuracy. Before use, ensure the surface is free of stains. We recommend wiping with a 50% water and 50% isopropyl alcohol solution. Dry with a soft cloth or paper towel to avoid damaging the granite surface with acidic cleaners or abrasive products. Before placing parts, gently abrade with stones to remove burrs or sharp edges. Rub the stones together before use to clean the platform to prevent impurities from scratching it. Important: No lubricant is required, as the oil film will directly affect measurement accuracy.
Daily Maintenance Taboos
Do not use ammonia-containing cleaners such as Windex (which may corrode the surface).
Avoid impacts with heavy objects or direct dragging with metal tools.
After cleaning, be sure to dry thoroughly to prevent residual water stains.
Long-Term Storage: Anti-Deformation and Dust Prevention
When not in use, take dual protective measures: We recommend covering the surface with 1/8-1/2 inch plywood lined with felt or rubber, or a dedicated dust cover, to isolate it from dust and accidental bumps. The support method must strictly comply with federal specification GGG-P-463C, using three fixed points on the bottom to ensure uniform load distribution and minimize the risk of sag deformation. The support points must align with the markings on the bottom of the platform.
Accuracy Guarantee: Calibration Period and Certification System
Annual calibration is recommended to ensure that the flatness error remains consistent with the original standard. Calibration must be performed in a controlled environment at a constant temperature of 20°C and humidity to avoid temperature gradients or airflow that may interfere with measurement results.
For certification, all platforms come with a calibration certificate traceable to NIST or equivalent international standards, guaranteeing flatness and repeatability. For high-precision applications such as aerospace, additional UKAS/ANAB-accredited ISO 17025 calibration services can be requested, enhancing quality compliance through third-party endorsement.
Calibration Tips
Verify the validity of the calibration certificate before first use.
Recalibration is required after regrinding or field use (in accordance with ASME B89.3.7).
It is recommended to use the original manufacturer or an authorized service provider for calibration to avoid permanent loss of accuracy due to unprofessional operation.
These measures ensure that the granite platform maintains micron-level measurement stability over a service life of over 10 years, providing a continuous and reliable benchmark for applications such as aerospace component inspection and precision mold manufacturing.
Post time: Sep-11-2025