Custom Size Granite Surface Plate

Custom size granite surface plates are precision reference tools tailored to specific dimensional requirements,widely used in metrology,precision machining,and component inspection.Made from high-quality dense granite such as Jinan Qing,Taishan Qing,or Black Gabbro,these plates boast excellent material properties that ensure long-term stability and accuracy.

The core material features low porosity(water absorption≤0.13%),Mohs hardness 6–7,and low thermal expansion(≈4.6×10⁻⁶/°C),along with non-magnetic,corrosion-resistant,and strong vibration damping performance.Accuracy grades comply with ISO 8512/GB/T 15831,ranging from 000 to 2,with 000/00 grades for calibration labs and 0/1/2 grades for production and assembly scenarios.

Customization options include flexible dimensions,with length ranging from 300mm to 4000×2000mm(larger sizes available via seamless splicing)and thickness 50–400mm based on span and load.Additional custom features cover surface treatments like fine lapping(Ra≤0.08μm),polishing,secondary machining such as T-slots,threaded inserts,and chamfers,as well as matching accessories like vibration isolation pads and calibration certificates.

Compared to standard plates,custom ones fit limited spaces and oversized components perfectly,avoid redundant material waste,and improve workflow efficiency with tailored fixtures.The customization workflow involves requirement confirmation,material selection,CNC cutting,precision lapping,inspection,and calibrated delivery,with a lead time of 2–6 weeks.

These plates are essential for CMM bases,mold inspection,and precision assembly,providing reliable flat reference surfaces for high-precision measurement and manufacturing.