UNPARALLELED LTD is one of the leading manufacturers and suppliers of granite straight edge with high precision 0.001mm in China. With abundant experience, we warmly welcome you to buy advanced granite straight edge with high precision 0.001mm made in China here from our factory. We also accept custom orders.
Product Description
Granite Straight Edge with high precision 0.001mm
Also known as granite straight edge, granite ruler, or granite measuring tool, this product is made from Jinan Black Granite (also called Taishan Black Granite) with a density of 3070 kg/m³. It is available with two or four precision surfaces and is ideal for use in CNC and laser machines, as well as for assembly, inspection, and calibration tasks in laboratories and metrology equipment setups.
We can produce granite straight rulers with a precision of up to 0.001 mm.
Feel free to contact us for more information.
Brand:UNPARALLELED
Material: granite
Executive Standard: DIN, ASME, JJS, GB, Federal...
Min. Order Quantity: 1 Piece
Supply Ability: 100,000 Pieces per Month
Payment ltem:EXW, FOB, CIF, CPT, DDU, DDP..
Origin:Jinan city, Shandong Province, China
Surface treatment: ground finish
Precision grade: Better than 0.00lmm (Nano technology)
Packaging: Custom Export Fumigation-free Wooden Box
Products Certificates:Inspection Reports, Material Analysis Report; Certificateof conformity; Calibration Reports for Measuring Devices
Lead Time:10-15 workdays
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 |
|
... |
... |
... |
... |
... |
... |
... |
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
|
Model |
Granite Straight Edge with high precision 0.001mm | ||
|
Size |
Custom |
Application |
Metrology, Measuring,Calibration... |
|
Condition |
New |
After-sales Service |
Online supports, Onsite supports |
|
Origin |
Jinan City, CHINA |
Material |
Nature Black Granite |
|
Color |
Pure Black |
Brand |
UNPARALLELED |
|
Precision |
0.001mm |
Weight |
≈3.07g/cm3 |
|
Standard |
DIN/ GB/ JIS... |
Warranty |
1year |
|
Packing |
Custom Export Plywood CASE |
After Warranty Service |
Video technical support, Online support, Spare parts... |
|
Payment |
T/T, L/C... |
Certificates |
Inspection Reports/ Quality Certificate |
|
Keyword |
Granite Measuring Ruler; Granite Straight Edge with high precision 0.001mm, Granite Straight Edge |
Certification |
CE, GS, ISO, SGS, TUV... |
Factory Showcase
Why Choose Black Granite for Precision Instruments?
Black granite is widely used in the manufacturing of precision components due to the following advantages:
Dimensional Stability: As a naturally aged material formed over millions of years, black granite offers excellent internal stability.
Thermal Stability: It has a much lower coefficient of linear expansion compared to steel or cast iron, minimizing thermal deformation.
Hardness: Its hardness is comparable to high-quality tempered steel.
Wear Resistance: Instruments made from black granite offer extended service life.
High Accuracy: The surface flatness achieved with granite is superior to that of traditional materials.
Chemical Resistance: Black granite is resistant to acids and oxidation, and it does not corrode-ensuring long-term durability with no maintenance required.
Non-Magnetic & Electrically Insulating: Suitable for sensitive measuring environments.
Cost-Effective: With advanced processing technologies, granite components can be manufactured at a lower cost.
Easy Overhaul: Any required servicing is fast and economical.
Customization: Custom sizes are available upon request.
Quality Control
International Certification and Service System
transportation
1.Documents together with products: inspection reports + Calibration reports(measuring devices + Quality Certificate + lnvoice +
Packing List+ Contract + Bill of Lading(or AWB).
2.Special Export Plywood Case: Export fumigation-free wooden box.
3.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: What color of granite is best?
A:
It is important to note that color alone is not an indication of the physical qualities of the stone. In general, the color of granite is determined by the presence or absence of minerals which may have no bearing on the qualities that make good surface plate material. There are pink, gray, and black granites that are excellent for surface plates, as well as pink, gray, and black granites that are totally unsuitable for precision applications. The critical characteristics of granite, as they pertain to its use as a surface plate material have nothing to do with color, and are as follows:
Stiffness (deflection under load - indicated by Modulus of Elasticity).
Hardness
Density
Wear resistance
Q: How can I reduce wear, and extend the life of my surface plate?
A:First, it is important to keep the plate clean. Airborne abrasive dust is usually the greatest source of wear and tear on a plate, as it tends to embed in work pieces and the contact surfaces of gages. Second, cover your plate to protect it from dust and damage. Wear life can be extended by covering the plate when not in use, by rotating the plate periodically so that a single area does not receive excessive use, and by replacing steel contact pads on gauging with carbide pads. Also, avoid setting food or soft drinks on the plate. Note that many soft drinks contain either carbonic or phosphoric acid, which can dissolve the softer minerals and leave small pits in the surface.
Q: How often should a surface plate be calibrated?
A:This too depends on the plate usage and environment. We recommend that a new plate or precision granite accessory receive a full recalibration within 1 year of purchase. If the plate is going to receive heavy use, it may be advisable to shorten this interval to six months. Monthly inspection for repeat measurement errors using a Repeat-o-Meter, or similar device will show any developing wear spots and only takes a few minutes to perform. After the results of the first recalibration are known, the calibration interval may be extended, or shortened as allowed or required by your internal quality system.
Q: Why granite? Is it better than steel or cast iron for precision surfaces?
A:The answer is 'yes' for almost every application. The advantages of granite include: No rust or corrosion, almost immune to warping, no compensating hump when nicked, longer wear life, smoother action, greater precision, virtually non-magnetic, low co-efficient of thermal expansion, and low maintenance cost.
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