UNPARALLELED LTD is one of the leading manufacturers and suppliers of 00 class high precision granite straight edge in China. With abundant experience, we warmly welcome you to buy advanced 00 class high precision granite straight edge made in China here from our factory. We also accept custom orders.
Product Description
00 Class High Precision Granite Straight Edge made from Jinan Qing natural granite have excellent stability, rust-proof, corrosion-resistant and non-magnetic properties. Ensure accurate detection of verticality, parallelism and straightness in industrial and scientific applications. With HS70+ Shore hardness and strict flatness standards.
Parameter description:
Accuracy level: 00 grade
Material: natural granite
Density: 3.07g/cm3
Compressive strength: 276MPa
Thermal expansion coefficient: 5.7-7.34×10-6/℃
Water absorption: 0.051%
Product Specifications
|
TYPE(mm) |
Squareness beteween abjacent measuring |
Straightness of measuring |
Parallelism between |
|||
|
Precision Grade |
||||||
|
00 |
0 |
00 |
0 |
00 |
0 |
|
|
150*150 |
1.8 |
3.5 |
0.8 |
1.6 |
1.8 |
3.5 |
|
160x160 |
2 |
4 |
0.8 |
1.7 |
2 |
4 |
|
200x200 |
2 |
4 |
0.9 |
1.8 |
2 |
4 |
|
250x250 |
2.2 |
4.5 |
1 |
2 |
2.2 |
4.5 |
|
315x315 |
2.6 |
5.2 |
1.1 |
2.3 |
2.6 |
5.5 |
|
400x400 |
3 |
6 |
1.3 |
2.6 |
3 |
6 |
|
500x500 |
3.5 |
7 |
1.5 |
3 |
3.5 |
7 |
|
... |
... |
... |
... |
... |
... |
... |
| If need custom High Precision granite square ruler, please contact: info@unparalleled-group.com | ||||||
Industry Applications
Mechanical manufacturing and machine tool industry
the "guiding star" of benchmark measurement
Aerospace and defense industry
accuracy guarantee in extreme environments
Automobile manufacturing and parts testing
quality control of mass production
Metrology and scientific research laboratories
the "ultimate reference" of calibration standards
|
BRAND |
UNPARALLELED |
MATERIAL |
Black Granite |
|
APPLICATION |
Metrology, CNC, Laser |
DENSITY |
3070kg/m3 |
|
CONDITION |
NEW CUSTOM |
COLOR |
Black |
|
ORIGIN |
Jinan |
PRECISION |
1 μm |
|
WARRANTY |
1 YEAR |
STANDARD |
DIN, GB, ASME,JIS... |
|
PACKAGING |
Custom Export Package |
CERTIFICATE |
ISO9001, CE... |
|
PAYMENT ITEM |
T/T, LC... |
KEY WORD |
00 Class High Precision Granite Straight Edge |
|
MATERIAL |
Jinan, China; India; South Afica |
TECHNICAL |
Inpsection& Calibration& Assembly |
|
PRICE |
EXW, FOB, CIF, DAP, CPT... |
SERVICE |
Design drawings |
Factory Showcase
High precision
After long-term natural aging, granite has a uniform structure, a small expansion coefficient, and the internal stress completely disappears, resulting in very high accuracy.
Strong wear resistance
Good rigidity, high hardness, and strong wear resistance.
Long service life
Not afraid of acid and alkali corrosion, will not rust; no oiling is required, easy to maintain, and long service life.
Not easy to wear
Will not scratch, will not be limited by constant temperature conditions, and can maintain measurement accuracy at room temperature.
Good flatness
Will not be magnetized, can move smoothly during measurement, no tight feeling, no influence of moisture, and good flatness.
Test the flatness of parts
Suitable for the inspection and high-precision measurement of instruments, precision tools and mechanical parts.
Quality Control
International Certification and Service System
- 00 Grade Granite Straight Edge – Ultra Precision
- ISO & CE Certified: Made according to international standards, safe and compliant.
- Flawless Accuracy: Stress relief, hand-finished, reliable accuracy.
- Certified Quality: Pre-shipment inspection, with calibration certificate.
- Expert Craftsmanship: Global leading origin, craftsmanship.
- Heavy-Duty Protection: Thickened foam + aviation-grade wooden box, safe and worry-free transportation.
- Reliable Support: Quick return and exchange for quality problems, guaranteed service.
transportation
-
Precision Granite Square – Reliable Accuracy, Even After Transport
To maintain high precision, granite squares are fully manufactured and inspected in a constant-temperature room. Once removed, temperature changes and transport vibrations may slightly affect accuracy.
To ensure optimal use:
Let the cube rest for 24 hours in a stable environment before first use.
Packaging: Multi-layer crates with inner film and shock-absorbing boards.
Transport Deviation: Typically ≤0.5μm, no effect on functionality.
Key Benefits
Durable & Stable: Resistant to acid, alkali, heat (–20℃ to 50℃)
Long-term Precision: Deformation <0.8μm/m per year
Wide Use: Ideal for machine calibration, CMM reference, and assembly checks
- 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 |
... |
FAQ
Q: Why use a granite surface plate to measure with a height gauge?
A: Many laboratories and shops rely specifically on granite surface plates for precise measurement and inspection. Every measurement depends on an accurate surface reference from which dimensions are taken, and granite plates offer the perfect base for gaging surfaces and making accurate height measurements.
Q: What is the difference between pink and black granite surface plate?
A:The Black Granite or Diabase is harder than the other granites. The modulus of elasticity is 9.5 x 10 to 6th power comparing to the Crystal Pink which is 3.8 x 10 to the 6th power. However, due to the quartz content of 32% in the Crystal Pink it will outlast the Black 5 to 1.
Q: What is the most accurate surface plate?
A:Granite Surface Plates are available in different grades, including A-Grade, B-Grade, and AA-Grade. These grades indicate the accuracy and flatness of the surface plate, with AA-Grade being the most accurate and flat.
Q: How accurate is the surface plate?
A:They have been proven very valuable to record long term effects of surface plates. Reliable measurements with an accuracy of 0.1 μm/m demonstrate the capabilities of the method.
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