UNPARALLELED LTD is one of the leading manufacturers and suppliers of granite measuring square ruler in China. With abundant experience, we warmly welcome you to buy advanced granite measuring square ruler made in China here from our factory. We also accept custom orders.

Granite Measuring Square Ruler
Granite precision master squares with one large face & four edges flat, square & parallel to each other and the holes for reduce weight,generally to be used on any work that requires the checking of squareness or parallelism.
Granite master squares have 6 finished faces . One large square face is finished flat and perpendicular to the four sides, which are parallel and perpendicular to one another.
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

Precision mold assembly
During the mold positioning and clamping process, the granite square is used to correct the vertical angle and boundary reference to improve the assembly consistency and repeatability.

Metrology laboratory and calibration center
As a standard part, it is used to calibrate instruments such as dial indicators, height gauges, and laser probes to ensure the credibility of laboratory measurement systems.

Aerospace and military fields
In the manufacturing of satellite structural parts and aircraft parts, it is used as a high-stability measurement benchmark to meet the needs of precise detection in complex environments.

Automobile parts manufacturing
It is used for angle calibration and assembly detection of key parts such as engine cylinder block and transmission housing to ensure the accuracy consistency of mass production.
|
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 |
Granite Measuring Square Ruler |
|
MATERIAL |
Jinan, China; India; South Afica |
TECHNICAL |
Inpsection& Calibration& Assembly |
|
PRICE |
EXW, FOB, CIF, DAP, CPT... |
SERVICE |
Design drawings |
Factory Showcase








Cutting/Cutting
Position the granite wool and use a large gantry saw to rough cut the granite. Obtain the required dimensions of granite;
Use high-precision alloy saw blades to precisely cut granite to obtain the precise dimensions required;
Use circulating water to reduce the temperature generated by cutting;
Shaping
The precisely cut granite is rough planed on the planer and then transferred to fine planing.
Obtain the required thickness and precise dimensions;
Use circulating water to reduce the temperature of the plow head when working;
Grinding/Grinding
The planed granite is roughly ground on a grinder and then finely ground;
Use circulating water to reduce the temperature of the grinding head during operation;
Manual polishing precision surface/Manual Polishing
Adjust the level on the support frame;
Select the appropriate mold (granite slab) according to the external dimensions of the granite, and use emery Grind the surface with appropriate water, first with coarse sand and then with fine sand, grinding to the required accuracy level;
The grinding process needs to ensure constant temperature and humidity.
Drilling, Slotting/Drilling&Slotting
The ground granite slab is placed on the CNC drilling machine, and holes or grooves are drilled according to the drawing;
Use circulating water to reduce the temperature generated by cutting;
Insert/Insert
Prepare the special glue for granite, apply it evenly around the metal parts, and leave it until the holes are drilled. In the granite slab, the metal parts are generally lower than the granite surface.
Quality Control

International Certification and Service System
- Granite Measuring Square Ruler Precision Beyond Compare: Manufactured in accordance with ISO 9001 quality standards and Fully compliant with CE safety directives. Stress-relieved and hand-polished for flawless accuracy.
- Certified Excellence: Every product is factory-tested and comes with an official calibration certificate-ensuring top-tier standards.
- Crafted by Experts: Manufactured in a world leading granite processing hub with skilled artisans and uncompromising quality control.
- Unmatched Protection: Built for extreme strength and impact resistance. Safely packaged with thick foam and secured in an aviation-grade wooden crate.
- Support You Can Rely On: Our dedicated team guarantees swift return or exchange service to address any quality concerns.

transportation
- The materials selected by our company are all black granite materials.
Granite is a natural stone. It is important to choose the right material. Choose the right size and size according to your needs. Granite with no cracks and uniform color.
Pour water on the surface of the granite, observe the permeability of the water, and see the texture of the granite.
Sudden sudden cooling and heating can cause cracks or even fractures in granite. - 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: Can I make customized for the Granite surface plate?
A: Yes, the material and size can be changed as per your requests.
Q: When can I get the sample?
A:Sample: 5-15 days after you start to make mold if need . The accurate time depends on your product.
Q: How to chose good Granite surface plate?
A:Chose one high and bigger brand factory, brand is important for the quality and won't do the low price competition.
A:Carefully looking the material, regular casting factory has strict material report and casting quality assurance
Q: How can I get the quotation of the project?
A: If you have drawing, we can offer you our quotation according to your drawing. If you have no design, our engineer will design some drawings for you to confirm. And then offer you a quotation.
A:Tooling: 100% TT advanced. A:Main order: 50%
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