Granite surface plates are essential in precision measurement and inspection tasks across various industries. These platforms are widely used for marking, positioning, assembly, welding, testing, and dimensional inspection in manufacturing and mechanical engineering applications.
Main Applications of Granite Inspection Plates
Granite inspection platforms provide a high-precision reference surface ideal for:
Dimensional inspection and measurement
Assembly and positioning tasks
Marking and layout operations
Welding fixtures and setups
Calibration and dynamic mechanical testing
Surface flatness and parallelism verification
Straightness and geometric tolerance checks
These plates are a critical tool in machining, aerospace, electronics, automotive, and tool manufacturing, offering reliable flatness for accuracy-critical processes.
Surface Quality Evaluation
To ensure that granite surface plates meet stringent quality standards, surface testing is performed according to national metrology and measurement regulations.
The inspection density is as follows:
Grade 0 and Grade 1: Minimum 25 measurement points per 25mm²
Grade 2: Minimum 20 points
Grade 3: Minimum 12 points
Precision grades are classified from 0 to 3, with Grade 0 offering the highest level of accuracy.
Inspection Scope and Use Cases
Granite surface plates serve as a base for:
Flatness measurement of mechanical parts
Geometrical tolerance analysis, including parallelism and straightness
High-precision marking and scribing
General and precision part inspection
They are also used as fixtures for test benches, contributing to:
Coordinate measuring machines (CMMs)
Machine tool calibration
Fixture and jig setups
Mechanical property testing frameworks
Material and Surface Features
These platforms are crafted from high-quality natural granite, known for its:
Dimensional stability
Excellent hardness
Wear resistance
Non-magnetic properties
Working surfaces can be customized with:
V-shaped grooves
T-slots, U-grooves
Round holes or elongated slots
All surfaces are carefully honed and hand-lapped to meet specific flatness and finish tolerances.
Final Thought
Granite inspection plates are indispensable tools for over 20 different industries, including machine tools, electronics, aerospace, and instrumentation. Understanding their structure and testing protocols helps ensure optimal use in precision operations.
By integrating these tools properly into your workflow, you’ll elevate the accuracy and reliability of your quality control processes.
Post time: Jul-29-2025