Granite Base Platform for CMM Systems

Product Specifications

Technical details and manufacturing context for Granite Base Platform

Definition

The Granite Base Platform is a critical structural component within an Automated Coordinate Measuring Machine System. It provides an ultra-stable, vibration-dampening, and thermally stable reference surface upon which the CMM's moving bridge, probe head, and workpiece are mounted. Its primary role is to ensure measurement accuracy by minimizing environmental distortions and maintaining geometric integrity during high-precision dimensional inspection operations. The platform is typically made of black granite or granite composite, chosen for its inherent properties: high dimensional stability, excellent vibration damping, and low thermal expansion. It is precisely leveled and anchored to create an invariant reference plane. The CMM's linear guideways and scales are mounted directly onto its machined surface, ensuring all measurement axes are orthogonal and stable relative to this fixed base. This stability is essential for repeatable, high-accuracy 3D coordinate measurements. The platform's surface flatness is specified as Grade 0 or 00 per ISO 8512-2, with values ranging from 0.001 to 0.003 mm, and surface roughness between 0.4 and 0.8 μm Ra per ISO 4287. It can support working loads from 500 to 2000 kg under uniformly distributed load, and operates within a temperature range of 10 to 40 °C. The thermal expansion coefficient is 5.5 to 6.5 ×10⁻⁶/K per ISO 17562, ensuring dimensional stability. Hardness is 55 to 60 HS per GB/T 2479, density 2.9 to 3.1 g/cm³ per ASTM C97, and water absorption is 0.1 to 0.4% per ASTM C97. Compressive strength ranges from 150 to 250 MPa per ASTM C170, and modulus of elasticity from 50 to 70 GPa per ASTM E111. The platform's weight varies from 1000 to 5000 kg depending on size and thickness, with dimensions ranging from 1000×800×150 mm to 3000×2000×300 mm. Custom sizes are available. These parameters are reference ranges; actual values must be confirmed for the specific model and application with the legal manufacturer or supplier.

Working Principle

The platform leverages the inherent properties of granite—high dimensional stability, excellent vibration damping, and low thermal expansion—to create an invariant reference plane. It is precisely leveled and anchored. The CMM's linear guideways and scales are mounted directly onto its machined surface, ensuring all measurement axes are orthogonal and stable relative to this fixed base, which is essential for repeatable, high-accuracy 3D coordinate measurements.

Common Materials

Granite (typically black granite or granite composite)

Technical Parameters

Parameter	Typical range	Notes & selection driver
Surface Flatness	0.001–0.003 mm	Grade 0 or 00 per ISO 8512-2ISO 1101
Surface Roughness	0.4–0.8 μm Ra	Critical for CMM accuracyISO 4287
Working Load Capacity	500–2000 kg	Uniformly distributed load
Operating Temperature Range	10–40 °C	Thermal stability required
Thermal Expansion Coefficient	5.5–6.5 ×10⁻⁶/K	Low expansion for dimensional stabilityISO 17562
Hardness	55–60 HS	Shore hardness for graniteGB/T 2479
Density	2.9–3.1 g/cm³	Typical for graniteASTM C97
Water Absorption	0.1–0.4 %	Low porosity prevents corrosionASTM C97
Compressive Strength	150–250 MPa	High load bearing capacityASTM C170
Modulus of Elasticity	50–70 GPa	Stiffness for minimal deflectionASTM E111
Weight	1000–5000 kg	Depends on size and thickness
Dimensions (L×W×H)	1000×800×150 – 3000×2000×300 mm	Custom sizes available

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Platform Body
The platform itself: the load-bearing surface everything else is mounted to.
Leveling Feet/Adjusters
Provide precise leveling and vibration isolation for the entire platform.

Material: Stainless Steel or Polymer Composite
Anchor Bolt Holes Part
Secure the platform to the foundation or floor.

Material: Steel Inserts
T-Slots or Threaded Holes Part
Allow for mounting of the CMM bridge, workpiece fixtures, and accessories.

Material: Steel Inserts

Manufacturers of Granite Base Platform

Manufacturer profiles associated with Granite Base Platform.

Sourcing Granite Base Platform from China?

Tell us your specification and target quantity — we will match it against manufacturer records and come back with the factories that fit.

Request manufacturers We manufacture this

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

Compiled and source-reviewed by the CNFX editorial team. Each manufacturer above links to the page on that company's own website where the product is listed, with the date we checked it. How we source and review · Page last updated 6 September 2026

Procurement Evaluation Criteria

A practical evidence checklist for RFQ preparation and supplier evaluation.

Technical documentation

Request current drawings, revision history, and a signed specification sheet.

Manufacturing capability

Verify equipment lists, process limits, capacity, and representative production evidence.

Inspection readiness

Confirm test methods, calibrated equipment, sampling plans, and traceable reports.

Supplier transparency

Check the legal entity, factory address, ownership, certifications, and direct contacts.

CNFX does not score or rank suppliers. Buyers must verify all claims and documents with the legal manufacturer before ordering.

Frequently Asked Questions

What is the primary function of the Granite Base Platform?

It provides a stable, vibration-dampening, and thermally stable reference surface for mounting the CMM's moving bridge, probe head, and workpiece, ensuring measurement accuracy.

What materials are used for the platform?

Typically black granite or granite composite, chosen for dimensional stability and low thermal expansion.

What are the key parameters to verify?

Surface flatness (Grade 0/00 per ISO 8512-2), roughness (0.4-0.8 μm Ra), working load capacity (500-2000 kg), and thermal expansion coefficient (5.5-6.5 ×10⁻⁶/K). Always confirm with the manufacturer.

How is the platform installed?

It is precisely leveled and anchored to create an invariant reference plane. Guideways and scales are mounted directly onto its machined surface.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

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.

Buyer enquiry

Request manufacturing insight for Granite Base Platform

Ask for use case, specification boundaries, supplier type, and RFQ preparation information for this product.

Where it goes: Straight to the CNFX editorial desk, and to the manufacturer if this product is linked to a claimed profile. Nothing is broadcast to a supplier list.
Your details stay here: We do not sell or rent enquiry data, and we do not add you to a mailing list. Used only to answer this request.
No commission, no middleman: CNFX is a directory. We take no cut of any order and never negotiate on a supplier's behalf.
What we don't claim: A listing is not an endorsement. Qualify every supplier and verify every figure yourself before ordering.

pressure:	N/A (static structural load only)
other spec:	Maximum load capacity: 500-5000 kg (varies by model), Vibration isolation: <2 μm amplitude, Flatness tolerance: 2-5 μm/m
temperature:	15°C to 25°C (operating), 10°C to 30°C (storage)

Granite Base Platform

Product Specifications

Industrial Ecosystem & Supply Chain Structure

Application Fit & Sizing Matrix

Reliability & Engineering Risk Analysis

Compliance & Manufacturing Standards