High-precision marble platform granite flat machine inspection workbench Grade 00 measurement irregular custom-made
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High-precision marble platform granite flat machine inspection workbench Grade 00 measurement irregular custom-made
II. Detailed Explanation of Accuracy Grades (Grade 00 Core)
Flatness Tolerance Formula: Tolerance μm = K×(1 d/1000)
d = Platform diagonal mm, inspection constant temperature 20±2℃
Grade Coefficient K Accuracy Level Application Scenarios
Grade 000 1 Ultra-precision metrology grade Metrology institutes, semiconductor lithography, optical laboratories, ultra-high precision CMM bases
Grade 00 2 Mainstream precision industrial Enterprise metrology rooms, mold verification, precision part inspection, CMM reference bases, measuring tool calibration
Grade 0 4 Workshop precision inspection Machining quality inspection, tooling verification, conventional precision assembly
Grade 1 8 Ordinary marking table Rough machining marking, simple inspection of ordinary parts
III. Standard Specifications and Custom Irregular Shapes
1. Regular Standard Plates (Grade 00 In-stock)
300×200, 400×400, 630×400, 800×500, 1000×630, 1200×800, 1500×1000, 2000×1500mm
Thickness: Small 50/70mm, Medium 100/130mm, Large ≥200mm (to ensure rigidity and prevent sagging)
2. Custom Irregular Shapes with Full Process (Machined to Order)
Functional Slot Machining
T-slots, parallel slots, cross slots, recessed slots, drainage slots, fixture positioning slots, with Grade 00 perpendicularity of slot walls guaranteed simultaneously
Hole Machining
Through holes, countersunk holes, threaded holes (pre-embedded stainless steel threaded sleeves to prevent stripping), locating pin holes, mounting foot holes
Irregular External Shapes
L-shape, U-shape, stepped surfaces, multi-step, cantilever platforms, circular / fan-shaped, machine tool beds, linear guide bases, CMM machine bases
Embedded Accessories
Pre-embedded steel sleeves, locating pins, anti-collision metal edging, lifting threads, adjustable support mounting positions
Combined Components
Granite square, square box, V-blocks, guide rail bases, optical tables, air-float bases
- +86-19963821514
- +86-19963824131
- +86-13287790581
- jintelai@jtlcnc.com
DETALLE DE PRODUCTOS
Selected Jinan Blue Fine-grained Granite, specifically chosen for measurement base materials:
Extremely stable dimensions, extremely low thermal expansion
Linear expansion coefficient is only 4.7×10⁻⁶/℃, with minimal deformation from temperature differences; cast iron is prone to thermal expansion/contraction and aging deformation, leading to long-term accuracy decline.
Non-magnetic, does not attract iron filings
No magnetic field interference for CMM and optical inspection, preventing magnetic attraction offset between workpieces and measuring tools.
Strong vibration damping
Natural damping from the internal crystal structure, workshop vibrations are not easily transmitted, resulting in better measurement data repeatability.
Wear-resistant, corrosion-resistant, and never rusts
Mohs hardness of 7, ensuring cutting tools and workpieces do not scratch the reference surface; no corrosion or rust spots even after long-term immersion in cutting fluids, weak acids, or weak alkalis.
No internal stress, long-lasting accuracy
The ore has undergone natural aging for millions of years, and stress is released through constant temperature aging after machining, with micron-level flatness changes over ten years; cast iron is prone to creep deformation.
Water absorption rate <0.13%
Dense and without capillary pores, liquids do not penetrate, and it will not swell due to moisture.
Basic physical parameters
Density: 2.65~2.7t/m³
Shore hardness: ≥70HS
Compressive strength: ≥245MPa
Working surface roughness: Ra≤0.2μm (mirror-finished)
