Shandong Jintelai Precision Machinery Co., Ltd.
Shandong Jintelai Precision Machinery Co., Ltd.
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Main Products: Granite precision mechanical components, Granite platform, Precision granite measuring tool, Granite surface plate stand
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The influence of humidity on precision granite surface plate

The impact of humidity on precision granite slabs / marble platforms, the core is: granite itself is very stable, but humidity can destroy through the environment, supporting structures, and measurement conditions.

1. Impact on the granite slab itself

Granite has extremely low water absorption and excellent dimensional stability, it hardlyforms, cracks, or warps under normal humidity.

Extreme high humidity for a long time will only produce a trace amount of moisture absorption expansion, which still affects micronlevel precision.

2. Impact on precision and measurement

Dew

High humidity   temperature difference → Condensation on the slab surface

Affects the measurement reading

Ca rusting of workpieces and measuring tools

Pollutes the work surface and destroys the gloss

Environmental fluctuations

Drastic changes in humidity can bring:

Changes in the index of air → Affects optical measurements

Surrounding clamping tools, measuring tools, and workpieces expand / contract inconsistently

→ The overall measurement error becomes

3. Impact on structures and accessories

The platform's brackets, adjusting feet, bolts, and bases are mostly metal:

High humidity environments are prone to rust, jam, and expansion

Leading to the platform being unable to be leveled, horizontal drift, and precision failure

4. Recommended usage environment

Relative humidity: 40~60%

Avoid: long-term >70%, direct sunlight, direct air conditioning, rapid dry-wet alternation

Simple summary:

Gran is not afraid of water, but it is afraid of the dew, rust, and environmental fluctuations caused by humidity. Humidity control is a key link to maintain precision

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