Level Ruler

Granite measuring tools have the following characteristics

1. 1.high precision reliable stability resistance to deform and guaranteed accuracy under normal ambient temperature.
2. 2.No-rust and anticorrosion
3. 3.wear resistance long service life
4. 4.any working surface cutting or scratching dose not bring about rough edges which  might influence its measuring presicion.
5. 5.nonmagnetization.
6. 6.gloosy surface without sluggishness when the workplaces or tools are moving on it .

Storan’s Granite Straight Ruler: Unlocking Wear-Resistant Precision for Inspection

In industrial inspection and precision engineering, the right level ruler isn’t just a tool—it’s a guarantee of accuracy. Storan’s granite straight ruler, crafted from premium Jinan blue granite, combines natural material excellence with meticulous craftsmanship to deliver unmatched wear resistance and precision, redefining what a spirit level ruler can achieve in harsh workshop environments.

The Power of Granite: A Material Built for Endurance

Our rulers leverage the inherent strength of granite, boasting a Shore hardness of HS70+—far exceeding steel or aluminum alternatives that succumb to scratches, dents, or corrosion over time. This hardness makes our 36 inch level with ruler and other sizes (24”, 48”) ideal for heavy-duty use: whether checking the flatness of machine tools, aligning assembly lines, or verifying geometric tolerances, the non-porous surface resists oil, coolant, and moisture, ensuring markings stay sharp and measurements remain reliable decade after decade. Unlike metal rulers that warp with temperature changes (thermal expansion coefficient: 8.3x10⁻⁶/°C for granite vs. 11x10⁻⁶/°C for steel), our granite rulers maintain stability in fluctuating environments, critical for aerospace, automotive, and semiconductor applications.

Precision Redefined: From Micro to Macro Scales

Storan’s 24-inch level with ruler and larger variants (36”, 48”) are precision-engineered to meet 00/0 grade standards, with straightness tolerances as tight as 0.0005mm/m (00 grade) and flatness within 1μm for reference surfaces. The integrated spirit level, embedded with airtight vials, ensures bubble alignment accuracy within 0.02mm/m, making it effortless to detect even the slightest tilts in machinery or worktables. This dual functionality—combining a spirit level ruler with a highly durable straight edge—eliminates the need for multiple tools, streamlining inspection processes and reducing downtime.

Why Choose Storan’s Granite Rulers?

Whether you need a 48-inch level with ruler for large-scale industrial installations or a compact 24” model for bench-top precision, our rulers are rigorously tested to ISO standards, ensuring consistency across every size. The non-magnetic properties of granite also make it safe for use near CNC machines or magnetic fixtures, a key advantage over metal counterparts. Plus, with custom engraving options for measurement scales or company logos, Storan’s rulers aren’t just tools—they’re tailored solutions for your unique inspection needs.

In a world where precision and durability are non-negotiable, Storan’s granite straight rulers stand apart. Elevate your inspection processes with a level ruler that doesn’t just meet standards but surpasses them, delivering wear-resistant performance that industrial professionals can trust.

Industrial Level Rulers: 7 Key Advantages of Granite for Long-Term Accuracy

In industrial measurement, maintaining precision over time is as critical as initial accuracy. Storan’s granite level rulers—available in sizes like 24-inch level with ruler, 36-inch level with ruler, and 48-inch level with ruler—leverage the unique properties of Jinan blue granite to deliver seven core advantages that set them apart for long-term accuracy in even the harshest workshop environments.

1. HS70+ Hardness: Unmatched Wear Resistance

With a Shore hardness rating exceeding HS70, granite outperforms steel (HS50-60) and aluminum, resisting scratches, dents, and edge wear that plague metal spirit level rulers. This durability ensures measurement markings stay sharp and reference edges remain true, even after decades of heavy use in CNC machining, assembly lines, or structural alignment tasks.

2. Thermal Stability: Defying Temperature Fluctuations

Granite’s low thermal expansion coefficient (8.3x10⁻⁶/°C) means minimal dimensional change with temperature shifts—far more stable than metal rulers, which expand/contract significantly (e.g., steel: 11x10⁻⁶/°C). This stability is crucial for maintaining accuracy in foundries, cold storage, or any environment where temperature swings could warp lesser materials.

3. Non-Magnetic Purity: Safe for Sensitive Equipment

Unlike steel or iron rulers, granite’s non-magnetic nature eliminates interference with CNC machines, magnetic fixtures, or precision sensors. This makes our level rulers ideal for aerospace, semiconductor, and medical device industries, where magnetic fields could compromise readings or damage equipment.

4. Corrosion Resistance: Thriving in Harsh Conditions

The non-porous crystalline structure of granite repels oils, coolants, moisture, and chemical spills, common in machining workshops. Unlike metal rulers that rust or degrade, our spirit level rulers maintain a clean, reliable surface, reducing the risk of measurement errors caused by surface contamination.

5. Engineered Precision: 00/0 Grade Standards

Storan’s rulers are precision-ground to meet 00/0 grade straightness and flatness tolerances (up to 0.0005mm/m for 00 grade), ensuring every 36-inch level with ruler or custom size delivers consistent, repeatable results. The integrated spirit level vials, sealed to prevent fluid evaporation, maintain bubble accuracy within 0.02mm/m, critical for detecting subtle tilts in heavy machinery or worktables.

6. Vibration Damping: Steady Readings in Noisy Environments

Granite’s dense structure absorbs mechanical vibrations from nearby presses, lathes, or conveyors, minimizing tremor-induced errors. This makes our 48-inch level with ruler a staple for large-scale industrial installations, where stability is key to aligning massive components like wind turbine bases or shipbuilding structures.

7. Customizable Solutions: Tailored to Your Needs

From compact 24-inch level with ruler for bench-top tasks to oversized 48” models for heavy machinery, we offer bespoke sizing, scale engraving, and even logo customization. This flexibility ensures your ruler fits seamlessly into unique workflows, whether for precision calibration or daily quality control checks.

In an era where downtime and rework eat into profits, Storan’s granite level rulers aren’t just tools—they’re investments in reliability. By combining nature’s toughest properties with engineering excellence, they deliver the long-term accuracy modern industries demand. Elevate your measurement processes with a ruler that stands the test of time.

Place of Origin：Hebei

Warranty：1 year

Customized support：OEM, ODM

Brand Name：Storan

Model Number：1007

Material：Granite

Color：black

Package：plywood box

Port：tianjin

Product name：Granite straight ruler leveling

Keyword：parallel ruller

size：630*100*63

Function：Test measurement

Shipping：by sea

precision：0 grade 00 grade

Packaging Details：plywood box

Port：tianjin

Supply Ability：1200 Piece/day

Physical properites:

Proportion,2970-3070kg/m3

Compression strength,245-254kg/mm2

Flexible grinding capacity,1.27-1.47N/mm2

Coefficient of linear expansion,4.6×1-6°C

Water absorption 0.13%

Shore hardness HS, more than 70.

Precision has 00, 0,  grade. It is the ideal tool for drawing line and inspection at precision processing company.

 160*25*16mm           1.5        3        20         40       1.5     3

250*40*25mm            2           4        30          60       2       4

400*63*40mm            4           8         40          80      4       8

630*100*63mm          6           12        50        100     6       12