UNPARALLELED LTD is one of the leading manufacturers and suppliers of high precision cnc mold granite straight edge in China. With abundant experience, we warmly welcome you to buy advanced high precision cnc mold granite straight edge made in China here from our factory. We also accept custom orders.
Product Overview
Our high precision CNC mold granite straight edge is crafted from premium "Jinan Black" granite, offering excellent dimensional stability, high wear resistance, and corrosion-free properties. It is an ideal tool for straightness inspection, machine installation, rail alignment, and flatness calibration in industries requiring high precision-such as CNC machining, mold making, and metrology labs.
Compared to traditional cast iron straight edges, our granite model provides superior accuracy, longer lifespan, and maintenance-free operation.
Product Specifications
|
Specification Model (Four precision surfaces) |
Straightness& Flatness of working surface |
Parallelism between working surfaces |
Squareness between working surface and side surface |
|||
|
Precision Grade(μm) |
||||||
|
00 |
0 |
00 |
0 |
00 |
0 |
|
|
400*60*35 |
1.6 |
2.6 |
2.4 |
3.9 |
8 |
13 |
|
630*100*50 |
2.1 |
3.5 |
3.2 |
5.3 |
10.5 |
18 |
|
1000*160*50 |
3 |
5 |
4.5 |
7.5 |
15 |
25 |
|
1600*250*80 |
4.4 |
7.4 |
6.6 |
11.1 |
22 |
37 |
|
2000*300*100 |
5.4 |
9 |
8.1 |
13.5 |
27 |
45 |
|
... |
... |
... |
... |
... |
... |
... |
Applications
CNC Guide Rail Straightness Calibration
Mold and Die Assembly Precision Alignment
Semiconductor Equipment Platform Leveling
Scientific Lab Flatness Inspection
Why Choose Us? Competitive Comparison
| Feature | Our Granite Straight Edge | Other Suppliers |
|---|---|---|
| Raw Material Quality | Jinan Black Granite, <5% biotite | Common granite, poor density |
| Flatness Accuracy | Up to 1μm/1000mm, with test report | Often lacks accuracy control |
| Surface Finish | Hand-lapped, Ra ≤ 0.32μm | Only machine ground, rough finish |
| Inspection Report | Included with each product | Optional or unavailable |
| Durability | Over 10 years, no deformation | Susceptible to chipping or warping |
| Technical Support | Full OEM support + engineer guidance | Limited or no technical support |
Factory Showcase
Key Features:
✅ Premium Raw Material: Made from high-density, fine-grained Jinan Black granite with low porosity and low thermal expansion.
✅ Superior Processing: CNC pre-machining + manual lapping ensures 00-grade or 0-grade flatness as per DIN/GB standards.
✅ Non-Deformable: Immune to thermal or humidity changes, ensuring long-term dimensional stability.
✅ Non-Magnetic & Corrosion-Free: Ideal for precision measuring tasks, especially in electronics, aerospace, or magnetic environments.
✅ No Rust or Maintenance Needed: Unlike cast iron, granite requires no anti-rust oil or frequent maintenance.
✅ Fully Customizable: We accept custom requests including length, cross-section, holes, inserts, and laser marking.
Quality Control
International Certification and Service System
transportation
- Packaging: Shockproof plywood box + foam interior
- Shipping Options: DHL / UPS / FedEx / Sea freight / Air freight
- Lead Time: 7–10 days for standard items, 10–20 days for customized products
FAQ
Q: How do I check the accuracy of a high precision CNC mold granite straight edge ?
Accuracy is typically verified by placing the straight edge on a known flat surface and using a sensitive indicator to check for deviations.
Q: How do I store a granite straight edge?
Store it in a protective case or on a level surface to prevent damage. Avoid dropping or impact.
Q: Maintenance and Care:
How do I clean a granite straight edge | high precision measuring tool for CNC & mold industry?
Clean the straight edge with a soft cloth and a mild cleaning solution. Avoid harsh chemicals or abrasive cleaners that could damage the surface.
Q: What can cause a granite straight edge to lose its accuracy?
Accidental impacts, improper storage, and exposure to extreme temperatures can affect the straightness and accuracy of a granite straight edge.
Request a Quote Today
Send us your drawing or required dimensions, and we'll respond with a competitive quotation, 3D model preview, and lead time within 24 hours. Global shipping and OEM welcome!
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