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- Precision Granite Surface Plate, Master Hand-Lapped to DIN 876 Grade 00 / ASME AA
Precision Granite Surface Plate, Master Hand-Lapped to DIN 876 Grade 00 / ASME AA
Achieve sub-micron flatness with our master hand-lapped granite surface plates. Combining CNC rough-grinding with 15+ years experienced craftsmen using a figure-8 trajectory, we deliver stress-free, isotropic surfaces meeting DIN 876 Grade 00 and ASME AA standards. Ideal for demanding metrology tasks, each plate features custom embedded components and is backed by professional re-lapping services..
Precision Granite Surface Plate, Master Hand-Lapped to DIN 876 Grade 00 / ASME AA
The Precision Granite Surface Plates of Shandong Sincere Precision Machinery company are not machined by robots alone. After producing process by CNC rough-grinding, each plate undergoes a final-stage hand lapping process performed exclusively by master craftsmen with 15+ years of experience. Using a figure-8 lapping trajectory and graded diamond slurry, every working face is manually corrected to achieve sub-micron flatness that meets or exceeds DIN 876 Grade 00 and ASME B89.3.7 Grade AA standards. The result is an isotropic, stress-free surface that provides a true reference plane for your most demanding metrology tasks.
I. Specifications:
Specification suface plate
II. Standard Size Chart for our granite surface plate:
common size of the Precision granite surrface plate
III . Key Features for our products:
1.Precision Lapping – Advanced Machine Grinding + Master Hand Finishing
Stage 1 – CNC Rough Grinding
High-precision CNC grinding machines remove bulk material and establish an initial flat reference plane with consistent geometry.
Stage 2 – Master Hand Lapping： A truly precision-lapped surface that only the combination of advanced technology + skilled human hands can deliver.
After machine grinding, each plate is transferred to our most experienced craftsmen. Using a figure-8 lapping trajectory and graded diamond slurry, they manually correct micro-deviations that machines alone cannot eliminate. This final hand-lapping step ensures:
— Stress-free surface (no heat-induced distortion)
–Isotropic texture (uniform in all directions)
–Sub-micron flatness meeting DIN 876 Grade 00 / ASME AA
IV .Packaging & Shipping
Inner packaging: Heavy-duty plastic wrap + foam corner protection
Outer packaging: Custom plywood crate with steel strapping
Shipping method: Sea freight (FCL / LCL), air freight, or express for small sizes
Lead time: Standard sizes in stock – 15 days; custom sizes – 35–40 working days
V. FAQ ：
Q: What is the difference between Grade 00 and Grade AA?
A: They are equivalent top-tier grades from different standards. DIN 876 Grade 00 and ASME B89.3.7 Grade AA share nearly identical flatness tolerances. We inspect each plate to both standards.
Q: How do you verify flatness?
A: We use an electronic level and auto-collimator following the standardized grid measurement method. Each plate is measured at multiple points, and the full report is included with shipment.
Q: Can I get a custom size?
A: Yes. We offer full customization including:
Slots / T-slots for fixturing
Inserts (steel, brass, threaded inserts)
Partial precision areas where only specific zones require Grade 00 / AA flatness
Special cutouts for clearance or mounting
Simply send us your drawing (PDF/DWG/STEP), and our engineers will review and quote within 24 hours.
Q: Do you offer re-lapping service?
A: Yes. If your existing plate wears over time, we offer professional re-lapping and recalibration services to restore it to original grade
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Payment & After-Sales
Flexible Payment Options: Multi-currency settlements (USD, EUR, etc.) supported, with secure payment channels such as T/T and L/C.
Contractual & Legal Safeguards: Bilingual contracts compliant with international practices clearly define responsibilities, quality standards, delivery timelines, and warranty terms. Notarization services available upon request.
Quality Assurance & After-Sales: Full-process quality control from raw material to delivery, accompanied by inspection reports. Warranty includes free replacement/return for non-manufacturing defects. Remote technical support and on-site services (terms negotiable) are provided.
Long-Term Partnership Benefits: Priority production scheduling, preferential pricing, and dedicated R&D resources available for recurring clients.
High-End Customization Services
Tailored High-Precision Granite Components: We specialize in custom-made granite parts for high end equipment manufacturers, backed by full inspection reports. Customization covers function, specifications, finish, and packaging, with flexible scaling from trial to mass production.
Localized Compliance Solutions: We adapt products to meet regional technical standards, environmental regulations, and certifications (e.g., CE, FDA), providing end-to-end support for market entry.
Joint R&D Collaboration: Our technical team collaborates directly with clients on specialized applications—from design and prototyping to testing—helping build competitive differentiation.
Language & Export Services
Professional English Support: Our team of native English speakers and business English specialists manages the entire process from consultation to after-sales. Proficient in Incoterms and industry-specific terminology, we ensure precise communication of technical and commercial details. Certified translation services are available for critical documents.
24/7 Cross-Time Zone Response: Operating on a shift system aligned with global time zones, we respond to inquiries within 12 hours on weekdays and address urgent issues within 4 hours.
Dedicated Account Manager: Each international client is assigned a single point of contact for end-to-end support, including customization, order tracking, and issue resolution.
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