Precision Granite Square Ruler with Portable Aluminum Case
The image showcases a precision granite square ruler, meticulously machined from high-density Jinan Qing granite — a material renowned in metrology for its exceptional dimensional stability and low thermal expansion. The ruler features a clean, matte-black finish with a precisely centered circular cutout, likely designed for ergonomic handling or mounting compatibility with inspection fixtures. A small, embedded certification plaque on the lower right corner confirms its 00-grade accuracy class — the highest standard for workshop and lab use.
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Model |
Details |
Model |
Details |
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Size |
Custom |
Application |
CNC, Laser, CMM... |
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Condition |
New |
After-sales Service |
Online supports, Onsite supports |
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Origin |
Jinan City |
Material |
Black Granite |
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Color |
Black / Grade 1 |
Brand |
ZHHIMG |
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Precision |
0.001mm |
Weight |
≈3.05g/cm3 |
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Standard |
DIN/ GB/ JIS... |
Warranty |
1year |
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Packing |
Export Plywood CASE |
After Warranty Service |
Video technical support, Online support, Spare parts, Field mai |
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Payment |
T/T, L/C... |
Certificates |
Inspection Reports/ Quality Certificate |
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Keyword |
Granite Machine Base; Granite Mechanical Components; Granite Machine Parts; Precision Granite |
Certification |
CE, GS, ISO, SGS, TUV... |
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Delivery |
EXW; FOB; CIF; CFR; DDU; CPT... |
Drawings’ format |
CAD; STEP; PDF... |
• Unmatched Stability: Jinan Qing granite’s molecular structure minimizes thermal drift — critical for maintaining accuracy across shifts or seasonal changes.
• Vibration Absorption: Unlike metal alternatives, granite naturally dissipates machine vibrations, ensuring cleaner readings during dynamic inspections.
• Portable Precision: The aluminum case transforms a lab-grade tool into a field-ready asset — perfect for on-site audits or multi-machine setups.
• Zero Maintenance: No rust, no coating degradation, no recalibration drift. Just wipe clean and store.
• Certified Confidence: Each unit bears its grade plaque — traceable, verifiable, and audit-ready.
We use various techniques during this process:
● Optical measurements with autocollimators
● Laser interferometers and laser trackers
● Electronic inclination levels (precision spirit levels)
1. Documents together with products: Inspection reports + Calibration reports(measuring devices) + Quality Certificate + Invoice + Packing List + Contract + Bill of Lading(or AWB).
2. Special Export Plywood Case: Export fumigation-free wooden box.
3. Delivery:
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Ship |
Qingdao port |
Shenzhen port |
TianJin port |
Shanghai port |
... |
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Train |
XiAn Station |
Zhengzhou Station |
Qingdao |
... |
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Air |
Qingdao Airport |
Beijing Airport |
Shanghai Airport |
Guangzhou |
... |
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Express |
DHL |
TNT |
Fedex |
UPS |
... |
Q: Why choose granite over steel for square rulers?
A: Granite doesn’t corrode, has lower thermal expansion, and absorbs vibrations better — making it ideal for environments where temperature fluctuates or machines generate noise.
Q: Is the 00 grade suitable for ISO-compliant labs?
A: Yes. 00 grade meets DIN 876 and GGGP-463C-78 standards for highest workshop accuracy — widely accepted in automotive, aerospace, and medical device manufacturing.
Q: Can I customize the size or add mounting holes?
A: Absolutely. We offer non-standard customization for unique fixture requirements — contact us with your specs.
Q: How do I maintain the ruler’s accuracy over time?
A: Store it in the provided case when not in use. Avoid dropping or exposing to extreme heat. Annual recalibration is recommended for critical applications.
QUALITY CONTROL
If you can’t measure something, you can’t understand it!
If you can’t understand it.you cant control it!
If you can’t control it, you can’t improve it!
More information please click here: ZHONGHUI QC
ZhongHui IM, your partner of metrology, help you succeed easily.
Our Certificates & Patents:
ISO 9001, ISO45001, ISO14001, CE, AAA Integrity Certificate， AAA-level enterprise credit certificate…
Certificates and Patents are an expression of a company’s strength. It’s society’s recognition of the company.
More certificates please click here: Innovation & Technologies – ZHONGHUI INTELLIGENT MANUFACTURING (JINAN) GROUP CO., LTD (zhhimg.com)
