We don't sell stone.
We sell precision.
Custom granite and marble components machined to your drawings — from Grade-00 surface plates to precision CMM worktables, delivered with traceable quality and dependable lead times.
One drawing is all it takes to start
Send us your drawings, dimensions and tolerance requirements. We handle material, machining, inspection and export — with a partner factory in China that has served precision metrology programs for over a decade.
Metrology & Precision Components
Surface plates, straightedges, squares, V-blocks, parallels, boxes — plus CMM worktables, guideways, platforms and special components.
View products →Custom Fabrication to Drawings
Drilling, slotting, metal inserts, tapped holes, special shapes — produced to your tolerances in granite or marble, small series or bulk.
See capabilities →China Sourcing & Inspection
Find factories, compare prices, verify suppliers, check your order in production and follow quality — across any product category.
View services →
Stone that stays still while everything else moves
Natural granite is the reference material of precision engineering — no rust, no magnetism, no thermal surprises.
- Dimensionally stable — minimal expansion, holds calibration over decades of use
- Non-magnetic & rust-free — safe around sensitive instruments and electronics
- Acid- & alkali-resistant — survives workshop fluids without corrosion
- High wear resistance — lapped surfaces keep their geometry in daily use
Send us a drawing. Get a quote with full spec.
Material, dimensions, tolerances, finish, quantity, target price, lead time — one email starts the conversation.
Request a QuoteGranite metrology & precision components
Produced from selected natural granite, lapped and inspected to the grade you specify. Every item can be customised to your drawings — dimensions, holes, slots, inserts and finish.
Surface Plates & Tables
Reference plates for inspection and calibration, from workshop to Grade-00 laboratory accuracy.
- Grade 00 / 0 / 1 / 2
- With stand, frame or plain
- Sizes up to project scale
Squares, Straightedges & Angle Plates
For checking perpendicularity, flatness and right angles in machines and assembled work.
- Granite squares & angle plates
- Straightedges & parallel straightedges
- Grade 00 / 0 available
CMM Worktables & Guideways
Granite bases for coordinate measuring machines and inspection stations, with precision rails and mounting points.
- Guideways & machine bases
- Drilled, slotted, inset to drawing
- High rigidity, low deflection
Inspection Tables with Stands
Complete inspection workstations — granite plate on a welded steel frame, ready for the lab or shop floor.
- Adjustable levelling feet
- Export packing included
- Accessories on request
Machine Bases & Platforms
Large granite platforms and vibration-isolated bases for precision equipment and PCB drilling machines.
- Vibration-isolated platforms
- Discs & special shapes
- Metal inlay & tapped holes
V-Blocks, Parallels & Special Components
Workholding and inspection aids plus custom-machined components for specialist measuring systems.
- V-blocks, parallels, boxes
- Digital levels & measuring machines
- Any shape to your drawing
Machining, inspection & standards
We machine natural stone like a machine shop machines steel — to drawings, to tolerances, with inspection records you can verify.
Machining to your drawings
- Drilling, counter-boring and tapping
- Slotting, channels and recesses
- Metal inlay, inserts and guides
- Special and complex shapes
- Large series or single custom pieces
Inspection & verification
- Electronic measuring instruments
- Computer-aided data processing
- Grade verification to 00 / 0 / 1
- Inspection reports with photos on request
- Independent third-party inspection welcome
Typical specification sheet
| Parameter | Typical range |
|---|---|
| Material | Natural granite (grey / black / green) · marble · other natural stone |
| Surface plate grade | Grade 00, Grade 0, Grade 1, Grade 2 (per ISO 8512 / DIN 876 / GB/T 20428) |
| Flatness | Up to 0.001 mm class on reference plates, size dependent |
| Machining | Drilling, slotting, metal inlay, tapped holes, special profiles |
| Finish | Lapped, honed, polished or flamed surface, per application |
| Drawing formats | PDF, DWG/DXF, STEP, IGES, or sketch with dimensions |
| Lead time | Typically 15–35 days after drawing approval, size dependent |
| Packing | Export-grade wooden crates with protective fixing |
From one drawing to a delivered order
Beyond machining, we act as your on-the-ground team in China — find suppliers, verify factories, follow production and keep communication clear.
OEM Fabrication to Drawings
Granite and marble parts machined exactly to your drawings — material, grade, machining, finish and inspection all managed end to end.
Sourcing & Price Comparison
Need a product from China but don't know who to trust? We find suitable factories and compare real quotes across categories.
Factory Inspection & Audit
Already chose a supplier but can't fly over? We visit the factory for you — confirm it exists, check your order in production, verify quality and shipment status.
Order Follow-up & QC
We track your order through production, flag problems early, inspect goods before shipment and confirm dispatch on time.
Communication & Translation
Supplier speaks Chinese, you speak English — we bridge the gap in calls, meetings, technical documents and factory visits.
One Team, Two Hats
Most clients use us both ways: buy precision stone components from our factory, and use us as their China inspection & sourcing service for everything else.
An export brand backed by a real factory
StoneCore Precision was built for one purpose — to make buying precision stone components from China as reliable as buying them at home.
Shandong Yinlei Precision Machinery Co., Ltd.
Founded in 2010 (formerly Jinan Yinlei Precision Instrument Co., Ltd.), Shandong Yinlei Precision Machinery Co., Ltd. is a long-term cooperating unit of AVIC Qingdao Qianshao, AVIC Beijing Precision Machinery Research Institute and Mitutoyo Precision Institute (Japan). It specialises in granite measuring tools and precision components, and is positioned as an export-oriented manufacturer of precision instruments.
StoneCore Precision manages the international side — engineering communication, drawings, export packing, inspection and shipping — while the factory focuses on what it does best: machining stone to micron-level truth.
A decade of precision, export-ready
Factory established
Yinlei Precision Machinery founded in Shandong — granite measuring tools as the core product line.
Precision programs
Long-term cooperation confirmed with AVIC Qingdao Qianshao, AVIC Beijing Precision Machinery Research Institute and Mitutoyo Precision Institute (Japan) in metrology and precision inspection.
Granite metrology & components
Surface plates, straightedges, squares, angle plates, V-blocks, parallels, boxes — plus CMM worktables, guideways, PCB drilling equipment, vibration-isolated platforms and special components.
Export-first
StoneCore Precision serves buyers across Southeast Asia and Europe, with sourcing and inspection support for any product category.
Where our components go
We welcome buyers anywhere. Every enquiry gets a direct answer — drawings, samples, trial orders and long-term supply are all part of the conversation.
Request a quote
Send us your drawing or your requirement — we reply within 1–2 working days with a spec-based quotation.
WhatsApp / WeChat
Available for buyers — request the number with your first enquiry.
Office hours
Monday – Saturday · 08:00–18:00 (GMT+8)
Replies typically within 1 working day.
What happens next
1. We confirm your spec and drawing
2. Quotation with grade, tolerance, packing & lead time
3. Sample / trial order or inspection visit before volume
4. Production, inspection report, shipment