Precision Surface Plate

UNPARALLELED LTD is one of the leading manufacturers and suppliers of precision surface plate in China. With abundant experience, we warmly welcome you to buy advanced precision surface plate made in China here from our factory. We also accept custom orders.

This product is a metrology-grade granite surface plate integrated with a precision-leveled steel support structure.

It is engineered for:

• Dimensional inspection
• Calibration procedures
• Precision assembly
• Equipment geometric verification
• Optical and laser alignment

Unlike general workshop inspection tables, this granite surface plate is designed specifically for ultra-precision environments where flatness, repeatability, and thermal stability are critical.

1️⃣ High-Density Black Granite for Dimensional Stability

UNPARALLELED® granite is not marble. It offers:

• Density ≈ 3100 kg/m³
• Low coefficient of thermal expansion
• Excellent resistance to deformation
• Natural vibration damping
• Corrosion resistance

Granite contains no internal residual stress, unlike cast iron. It will not warp over time due to stress release.

This makes it ideal for long-term dimensional reference applications.

2️⃣ Precision Flatness & Grid Integration

The working surface is:

• Precision ground and hand-lapped
• Available in DIN, ASME, JIS, GB accuracy grades
• Capable of micron or sub-micron flatness upon request

The grid of threaded inserts shown in the image allows:

• Flexible fixture mounting
• Modular assembly setups
• Optical equipment positioning
• Vacuum or clamping integration

This transforms the surface plate from a passive reference plane into an active assembly and inspection platform.

3️⃣ Rigid Steel Support Stand with Leveling System

The heavy-duty welded steel frame provides:

• Structural load distribution
• Adjustable leveling feet
• Floor vibration isolation
• Enhanced rigidity for large-format plates

Proper support is essential. Even the highest-grade granite plate requires uniform load distribution to maintain geometric accuracy.

UNPARALLELED® granite surface plates are widely used in:

• Metrology laboratories
• Semiconductor equipment assembly
• CMM verification
• Linear guide calibration
• Precision CNC setup
• Laser system alignment
• Optical inspection systems (AOI)
• Industrial CT measurement
• Tool and die inspection
• High-precision part assembly

For semiconductor and high-end automation industries, the granite surface plate serves as the geometric reference foundation for quality control.

Available customization options include:

• Sizes up to 6000 mm length
• Custom thickness configurations
• Integrated threaded inserts or T-slots
• Air bearing interfaces
• Embedded stainless steel bushings
• Cleanroom-compatible finishes

All plates are inspected using advanced metrology systems, including:

• Electronic levels
• Laser interferometry
• High-resolution dial indicators

Measurement traceability is maintained through nationally accredited calibration systems.

From a materials science perspective, granite remains the preferred reference material because:

• It is non-magnetic
• It does not rust
• It is chemically stable
• It provides excellent vibration absorption
• It maintains geometric accuracy for decades

Compared to cast iron surface plates, granite offers superior long-term stability and requires less maintenance.

This is why granite inspection tables are standard equipment in metrology labs worldwide.

To maintain accuracy over time:

Installation

• Place on stable, vibration-minimized flooring
• Level using precision instruments
• Ensure uniform support across all contact points
• Avoid uneven concentrated loads

Maintenance

• Clean with neutral, non-abrasive cleaners
• Avoid strong acids or alkalis
• Protect edges from mechanical impact
• Periodically verify flatness according to calibration schedule

With proper care, a granite surface plate can maintain its reference accuracy for decades.

The UNPARALLELED® Precision Granite Surface Plate is more than a flat surface - it is the foundation of measurement integrity.

When dimensional accuracy defines product performance, your reference platform must be uncompromising.

UNPARALLELED® delivers stability you can measure - and trust.

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