Why are Granite Bases Critical for Coordinate Measuring Machines (CMM)?

Coordinate Measuring Machines (CMM) rely on granite bases for structural stability. Our granite components minimize thermal distortion and vibration, ensuring that precision measuring equipment delivers repeatable results in dynamic industrial environments.

How does granite improve CMM accuracy?
CMMs require a structure that does not move or warp. Granite’s high rigidity and density of 3100kg/m³ provide a stable platform that resists dynamic forces, ensuring the measuring probe captures accurate data points every time.
What is the benefit of granite in dynamic scanning?
Modern CMMs move at high speeds. Granite’s superior damping properties absorb the kinetic energy from rapid movements. This prevents vibration resonance in precision measuring tools, allowing for faster scanning speeds without sacrificing accuracy.
How does granite compare to ceramic or aluminum for CMMs?
While aluminum is light and ceramic is hard, granite offers the best balance of cost, stability, and workability. It is the industry standard for granite mechanical components in CMMs due to its proven long-term reliability and ease of repair.
Material Selection for CMM Structures
Material Thermal Stability Cost Efficiency Damping Capacity
Granite High High Excellent
Ceramic Very High Low (Expensive) Good
Aluminum Low (High expansion) Moderate Poor
CMM granite components
Frequently Asked Questions (FAQ)
Q1: Why are granite bases used in CMM machines?
A: Granite provides high rigidity and thermal stability, which are critical for accurate 3D measurement.
Q2: Can granite CMM bases be repaired if damaged?
A: Yes, unlike ceramic, granite mechanical components can often be repaired or re-scraped locally.
Q3: Does the weight of granite affect CMM performance?
A: The weight adds stability, reducing the impact of external vibrations on the precision measuring equipment.
Q4: What grade of granite is used for CMM structures?
A: We use fine-grain Jinan Black Granite to ensure a smooth surface finish and uniform structure.
Q5: Can you manufacture moving parts for CMMs?
A: Yes, we produce beams, bridges, and moving saddles made from high-quality precision granite.
Q6: How do you package large CMM granite components?
A: We use reinforced wooden crates with foam padding to ensure safe transport of fragile granite parts

Post time: May-28-2026