Granite Surface Plates
High-Precision Reference Bases for Accurate Industrial Measurement
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SPT Metrology manufactures Granite Surface Plates in Grade 00 and Grade 0 accuracy, built to IS and DIN metrology standards for applications where measurement precision can't be compromised. As a trusted Granite Surface Plate Manufacturer, we serve automotive, aerospace, tooling, and precision machining industries across India that rely on absolute dimensional stability for CMM staging, height-gauge work, and comparator setups.
Why Granite Outperforms in High-Precision Work
Every plate is machined from high-density black granite, a material chosen specifically because it doesn't rust, doesn't magnetize, and barely moves with temperature change. Where cast iron can pick up small dimensional shifts across a shop floor's daily thermal swing, granite holds its geometry, making it the material of choice for CMM bases, height gauges, dial indicator work, and any setup where repeatability over months and years matters more than upfront cost.
Verified Flatness, Not Just Claimed Flatness
Every SPT Metrology Precision Granite Surface Plate is checked using a Wyler Swiss electronic level (200mm base, 0.001mm/m sensitivity, 20mm/m range) for micro-level flatness verification across the full working surface. We back this with a ROECKLE Germany spirit level (0.10mm/m least count), calibrated periodically through a NABL-accredited laboratory, so the tolerance on your certificate is traceable, not just stated.
Built for Metrology Labs and Production Floors Alike
Whether the plate is sitting in a climate-controlled inspection room or a working production floor, granite's low thermal expansion means it holds its calibration far longer between re-checks than a comparable cast iron surface. That translates to fewer recalibration cycles and more confidence in every reading taken off it.
Sizes & Custom Configurations
Standard sizes are available off the shelf, with custom dimensions, threaded inserts, T-slots, and dedicated precision stands built to match your specific fixture or inspection-cell layout, whether you're outfitting a bench-level QC station or a full CMM room.
Why Manufacturers Choose SPT
As a Granite Surface Plates Supplier trusted across Tamil Nadu and beyond, SPT Metrology backs every plate with dual-instrument flatness verification and NABL-traceable calibration, so what leaves our facility in Chennai or Dharmapuri holds up to audit-level scrutiny on your shop floor, not just on paper.
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Granite Surface Plate Manufacturers Across India.
From our facilities in Chennai and Dharmapuri, we manufacture and supply granite surface plates to toolrooms and inspection floors nationwide.