Structured Manufacturing Data (2026)

Granite Table/Base

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Granite Table/Base used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Granite Table/Base is characterized by the integration of Granite Slab and Leveling Feet/Adjusters. In industrial production environments, manufacturers listed on CNFX commonly emphasize Granite (typically black granite like Gabbro or similar) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A precision granite platform that serves as the stable reference surface and mounting base for a Coordinate Measuring Machine (CMM).

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Product Specifications

Technical details and manufacturing context for Granite Table/Base

Definition
The granite table or base is a critical structural component of a Coordinate Measuring Machine (CMM). It provides an extremely stable, flat, and vibration-dampening foundation upon which the CMM's moving bridge or gantry travels and upon which the workpiece being measured is placed. Its primary role is to ensure dimensional integrity and repeatability of measurements by minimizing thermal expansion, mechanical deflection, and environmental vibrations.
Working Principle
The granite table functions as a passive, ultra-stable reference plane. Its mass and the inherent properties of granite (low thermal expansion coefficient, high stiffness, excellent vibration damping) create an invariant datum. The CMM's measurement system (probe, scales, software) references all coordinate data to this fixed, geometrically true surface, ensuring that measurements of the workpiece are accurate and repeatable regardless of external disturbances.
Common Materials
Granite (typically black granite like Gabbro or similar)
Technical Parameters
  • Overall dimensions (Length x Width x Height), flatness tolerance, and surface finish specification. (mm) Customizable
Components / BOM
  • Granite Slab Part
    The monolithic, precision-lapped stone block that forms the reference surface.
    Material: Granite
  • Leveling Feet/Adjusters
    Mechanical supports (often three or more) used to level the granite table precisely on the factory floor.
    Material: Stainless Steel or Coated Steel
  • Tapped Holes/Grid Pattern Part
    An array of threaded holes in the granite surface for mounting workpiece fixtures, clamps, or the CMM structure itself.
    Material: Steel Inserts (set into granite)
  • Vibration Isolation Pads (Optional) Part
    Elastomeric pads placed under the leveling feet to further dampen floor-borne vibrations.
    Material: Rubber or Polymer

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Granite Table/Base.

precision granite CMM base coordinate measuring machine granite table black granite machine mounting platform vibration isolated granite surface plate industrial granite reference table for CMM

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Coordinate Measuring Machine (CMM)
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Machine Structure (Bridge/Gantry)
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Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
pressure: N/A (static structural load only)
other spec: Maximum load capacity: 500-5000 kg (varies by size), Flatness tolerance: 0.001-0.005 mm/m², Vibration damping: Natural granite properties
temperature: 15°C to 25°C (operating), 10°C to 30°C (storage)
Media Compatibility
✓ Clean room air environments ✓ Machine shop ambient air ✓ Temperature-controlled metrology labs
Unsuitable: High humidity (>80% RH) or corrosive chemical environments
Sizing Data Required
  • CMM working volume dimensions (X,Y,Z travel)
  • Maximum weight of CMM components and workpieces
  • Required flatness tolerance and surface finish specifications

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Surface degradation and micro-cracking
Cause: Thermal cycling and uneven heating/cooling causing differential expansion stresses in the granite material, leading to surface wear and subsurface crack propagation.
Structural integrity loss and dimensional instability
Cause: Vibration-induced fatigue and improper leveling/support causing stress concentrations, resulting in permanent deformation, warping, or cracking that compromises flatness and alignment.
Maintenance Indicators
  • Visible surface pitting, flaking, or discoloration indicating material breakdown
  • Audible hollow sound when tapping the surface (indicating subsurface voids or delamination)
Engineering Tips
  • Implement strict thermal management protocols to maintain stable ambient temperatures (±1°C) and avoid direct heat sources or rapid temperature changes that induce thermal stress.
  • Use vibration-isolating mounts and perform regular precision leveling checks with laser alignment tools to ensure even load distribution and prevent stress concentration points.

Compliance & Manufacturing Standards

Reference Standards
ISO 8512-2:1990 - Granite surface plates ANSI/ASME B89.3.7-2013 - Granite surface plates DIN 876-1:1986 - Granite surface plates
Manufacturing Precision
  • Flatness: ≤0.01mm per 1000mm
  • Parallelism: ≤0.02mm per 1000mm
Quality Inspection
  • Flatness verification using electronic level or laser interferometer
  • Surface finish measurement using profilometer

Factories Producing Granite Table/Base

Manufacturer profiles with relevant production capability in China

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Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What type of granite is best for CMM tables and why?

Black granite like Gabbro is preferred for CMM tables due to its exceptional dimensional stability, low thermal expansion, and fine-grained structure that provides a smooth, wear-resistant surface ideal for precision measurement applications.

How does the grid pattern of tapped holes benefit CMM operation?

The grid pattern of tapped holes allows flexible fixturing and secure mounting of various CMM components and workpieces, enabling precise positioning and repeatable measurements while maintaining the granite's flatness integrity.

What are the advantages of vibration isolation pads on granite bases?

Vibration isolation pads reduce external vibrations from machinery and environmental sources, minimizing measurement errors and ensuring the CMM maintains sub-micron accuracy during critical inspection processes.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data basis: CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks for Machinery and Equipment Manufacturing.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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