Precision granite plate manufacturer

CORE PRODUCT LINES

1.Certified Granite Surface Plates

We manufacture the full spectrum of accuracy grades to meet every tier of the quality chain.Our Grade 优良(Master Grade)plates serve as primary standards in calibration laboratories,with flatness tolerances within±0.000010″per foot.Grade AA(Laboratory Grade)provides exceptional accuracy for high‑precision inspection rooms.Grade A(Inspection Grade)is the industry workhorse for quality control departments,while Grade B(Toolroom Grade)offers reliable precision for shop‑floor layout and setup.Every plate is delivered with a NIST‑traceable calibration certificate and a complete 3D flatness map.

2.Granite Inspection&Assembly Tables

Beyond flat reference planes,we engineer granite tables with integrated functionality.These feature precision‑drilled grid patterns(such as 16mm or¾″holes on 100mm or 4″centers)for modular fixturing,T‑slot configurations for flexible clamping,and reinforced monolithic structures for heavy‑component assembly.Ideal for welding fixture foundations,coordinate measuring machine(CMM)setups,and optical comparator stations.

3.Custom Engineered Granite Bases&Structures

We design and build custom granite foundations for advanced manufacturing and measurement systems.This includes vibration‑damped CMM bases,granite bridges for measuring machines,kinematic mounts for laser trackers,and large‑format assembly platens for aerospace and energy applications.Our engineering team works directly with clients to develop solutions that meet specific stiffness,thermal,and dynamic requirements.

4.Granite Accessories&Reference Tools

A complete family of complementary precision tools:granite straight edges(Type I and II)for straightness verification,granite squares with angular accuracy within arc‑seconds,granite parallels and V‑blocks for part positioning,and granite sine plates for precise angular measurement.

TECHNICAL EXCELLENCE&MATERIAL SCIENCE

We source only the finest high‑density black granite from selected quarries worldwide,with material density exceeding 2.95 g/cm³and hardness rated 6‑7 on the Mohs scale.This premium granite offers a thermal expansion coefficient of only 5.5‑6.5×10⁻⁶/°C—roughly half that of steel—and provides superior vibration damping,making it the most stable material for precision measurement.

Our manufacturing process includes extended thermal stabilization to relieve internal stresses,multi‑stage precision lapping using diamond abrasives,and final verification with laser interferometers and electronic levels in our accredited calibration laboratory.Every surface is finished to a micro‑inch level smoothness,typically 2‑8µin Ra.

CERTIFICATION&QUALITY ASSURANCE

Each product ships with a comprehensive documentation package:

NIST‑Traceable Calibration Certificate(with 3D flatness contour map)

Material Test Report confirming density,hardness,and structural integrity

Certificate of Conformance to ANSI/ASME B89.3.7,ISO 8512‑2,or client‑specified standards

Recommended Maintenance and Re‑calibration Guide

Our quality system is certified to ISO 9001:2015,and our calibration laboratory is accredited to ISO/IEC 17025.We also hold AS9100D certification for aerospace manufacturing.

INDUSTRY APPLICATIONS

Aerospace&Defense:First‑article inspection,composite tooling masters,turbine component verification.

Automotive:Gauge R&R studies,prototype validation,production quality‑control stations.

Medical Device:FDA‑compliant inspection setups,implant measurement,clean‑room compatible surfaces.

Energy Sector:Nuclear component qualification,wind‑turbine blade inspection,large‑scale weldment alignment.

Research&Academia:National metrology institutes,university laboratories,advanced manufacturing research centers.

VALUE‑ADDED SERVICES

We partner with clients throughout the product lifecycle:

Technical Consultation:Our metrology engineers help select the optimal grade,size,and configuration for your specific measurement uncertainty budget and application.

Custom Design&Engineering:From special hole patterns and mounting inserts to complex monolithic structures with integrated damping systems.

Installation&Calibration Services:We offer on‑site installation,leveling,and calibration using portable interferometers and electronic levels.

Recertification&Resurfacing:Our factory can restore worn plates to original specifications and provide ongoing recalibration services.

Training&Support:Comprehensive training on proper use,care,and maintenance of granite reference products.

GLOBAL MANUFACTURING&SUPPORT

With manufacturing campuses in North America,Europe,and Asia,we provide local responsiveness with global consistency.Our vertically integrated facilities include:

Block selection and cutting

Thermal conditioning chambers

CNC machining and drilling centers

Precision lapping and honing lines

Accredited metrology laboratories

Custom packaging and logistics