Precision Granite Straight Edge

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

High-Accuracy Granite Reference for Alignment and Measurement

The Precision Granite Straight Edge is a high-stability reference tool designed for linear accuracy verification, alignment, and calibration in ultra-precision industrial and metrology environments. Manufactured from high-density black granite, this straight edge delivers excellent dimensional stability, low thermal expansion, and long-term geometric accuracy.

Its solid monolithic structure and finely finished working surfaces make it an essential reference standard for applications where straightness, repeatability, and reliability are critical.

• Exceptional Straightness Stability

Granite's natural structure provides superior resistance to deformation caused by temperature variation or mechanical stress. Unlike steel straight edges, granite does not bend, warp, or suffer from internal stress release over time.

• High Measurement Accuracy

All working surfaces are precision-ground and hand-lapped. Straightness accuracy can be controlled to the micron level, making the granite straight edge suitable for precision assembly, alignment, and inspection tasks.

• Excellent Vibration Damping

Granite absorbs vibration significantly better than metal materials. This characteristic ensures stable readings during measurement and reduces external interference in sensitive inspection environments.

• Corrosion-Free and Wear-Resistant

Granite does not rust or require surface coating. It maintains surface integrity even after long-term use, making it ideal for cleanrooms, laboratories, and production floors.

• Monolithic granite structure for maximum rigidity
• Precision-ground reference surface(s)
• Sharp edge control with protective chamfers
• Uniform material density for consistent load distribution
• Optional dual-reference faces, custom lengths, and accuracy grades

Each granite straight edge is manufactured and inspected in a temperature-controlled environment to ensure consistent quality and repeatability.

Precision granite straight edges are widely used in:

• CNC machine tool alignment and calibration
• Coordinate measuring machine (CMM) verification
• Linear guide and rail installation
• Precision machine assembly and leveling
• Metrology laboratories and calibration institutes
• Optical equipment and laser system alignment

They serve as primary straightness references in both production and inspection processes.

Granite straight edges require minimal maintenance:

• Clean with a lint-free cloth and neutral cleaner
• Avoid impact, point loading, or improper lifting
• Store on dedicated supports to prevent distortion
• Use in a temperature-stable environment for critical measurements

With proper handling, a granite straight edge can maintain its accuracy for many years without recalibration drift.

A Reliable Reference for Precision Work

Precision granite straight edges are fundamental tools wherever linear accuracy and long-term stability are required. Their inherent material advantages and precision manufacturing make them a trusted solution for high-end industrial and metrology applications.

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