UNPARALLELED LTD is one of the leading manufacturers and suppliers of granite engineering square in China. With abundant experience, we warmly welcome you to buy advanced granite engineering square made in China here from our factory. We also accept custom orders.
Granite Engineering Square
✅ Premium Black Granite Material – Sourced and precision-lapped for maximum durability and dimensional stability.
✅ 3D Axis Calibration Tool – Designed for highly accurate squareness checks of X/Y/Z axes in CNC, milling, and CMM applications.
✅ Thermal Stability & Non-Magnetic – Ideal for consistent accuracy in both lab and shop floor environments.
✅ Long-lasting Flatness – Resistant to wear, corrosion, and deformation over time.
✅ Sizes & Customization Available – Choose from a range of standard sizes or request a custom configuration to match your machinery.
Product Specifications
|
Name |
Granite Engineering Square | ||
|
Size |
Custom |
Application |
Metrology,Measuring,Celibration... |
|
Condition |
New |
After-sales Service |
Onine supports,Onsite supports |
|
Origin |
Jinan City |
Material |
Black Granite |
|
Color |
Black/Grade 1 |
Brand |
UNPARALLELED |
|
Precision |
0.001mm |
Weight |
≈3.05g/cm3 |
|
Standard |
DIN/GB/JIS... |
Warranty |
1year |
|
Packing |
Export Plywood CASE |
After Warranty Service |
Video technical support,Online support,Sqare parts,Field mai |
|
Payment |
T/T,L/C... |
Certificates |
Inspection Reports/Quality Certificate |
|
Keyword |
High-precision granite right angle ruler; Foreign trade measurement tools |
Certification |
CE,GS,ISO,SGS,TUV... |
Industry Applications
Ultra-precision machining
Precision vertical calibration for CNC guideways and mold alignment.
Aeronautics and Astronautics
High-precision squareness measurement of composite parts and installation alignment verification for satellite modules.
Mobility systems production
Batch inspection of vital dimensions in engines and transmissions.
Testing Facility
Calibrating optical instruments and serving as a precision alignment reference for fixtures.
Nanometer grinding technology
Right-angle accuracy meets ISO 9001 Grade 00 standard
Strict verification process
All products include a NIST-traceable certificate, where calibration is conducted using both laser interferometry and a three-coordinate measuring machine.
Non-slip chamfer
The edges feature R-shaped polishing for safety and collision prevention.
Natural stability
We select high-density granite, which is free from metal fatigue, non-magnetic, and features an ultra-low thermal expansion coefficient of (4-6)×10⁻⁶/℃-guaranteeing no deformation even in environments with temperature variations.
Extra-long service life
With a Mohs hardness rating of 6-7, it boasts excellent wear and corrosion resistance, and lasts three times longer than metal measuring tools.
Easy cleaning and maintenance
There's no risk of surface oxidation, and only alcohol wiping is needed to maintain long-term accuracy.
International Certification and Service System
✔ Certification & Compliance
Manufactured in accordance with ISO 9001 quality standards
Fully compliant with CE safety directives
✔ Packaging & Global Shipping
Secured with EPE shock-absorbing foam and non-fumigation custom plywood crates
Supports DDP/DAP global delivery - sea or air
Full insurance coverage for all international shipments
✔ After-Sales Support
12-Month Warranty: Free replacement for non-human damages
Lifetime Technical Assistance:
• Response within 48 hours for all technical inquiries
• On-site calibration training available upon request
Custom Value-Added Options:
• Company logo engraving
• Precision customization from AA to Grade 00
Quality Control
- Granite Engineering Square Quality certificate, inspection & calibration reports (for measuring tools), invoice, packing list, contract, and B/L or AWB.
- Export-Grade Plywood Case – No Fumigation Required
- Delivery:
|
Ship |
Qingdao port |
Shenzhen port |
TianJin port |
Shanghai port |
... |
|
Train |
XiAn Station |
Zhengzhou Station |
Qingdao |
... |
|
|
Air |
Qingdao Airport |
Beijing Airport |
Shanghai Airport |
Guangzhou |
... |
|
Express |
DHL |
TNT |
Fedex |
UPS |
... |
Everything You Need to Know
What is a granite square?
A precision granite square is a tool used specifically for checking the squareness (90-degree angle) between two surfaces or edges. Check 90 degree squareness of the X and Y axes when used in it's horizontal position. Check perpendicularity of the Z axes when used in it's vertical position.
What does 1 square foot of granite weigh?
The weight of granite depends on its density. The average 3/4″ thick granite weighs 13 pounds per square foot, 1 1/4″ thick granite weighs around 18 to 20 pounds per square foot, and 2″ thick granite weighs about 30 pounds per square foot.
Which is cheaper, quartz or granite?
Granite vs Quartz countertops. Who is the winner?
Generally, granite is slightly cheaper than quartz. However, both materials can vary significantly in price depending on factors like quality, brand, and specific design choices. Some higher-end quartz options can be more expensive than basic granite, and vice versa.
What color granite is the cheapest?
You'll typically find that tan and black granite slabs are the least expensive, and that white granite tends to be higher in cost. Yet, black and white are both the two most popular choices in granite colors.
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