For metrology laboratories and precision manufacturing workshops, granite triangular squares serve as core gauges to maintain angular benchmarks. Many procurement teams focus only on the factory accuracy at the time of purchase, yet overlook storage procedures. Improper storage may damage reference surfaces during long-term placement and trigger irreversible loss of angular and flatness accuracy, directly interfering with calibration results of CMM, optical inspection and semiconductor equipment. Drawing on years of experience in ultra-precision gauge manufacturing and customer service, ZHHIMG sorts out key storage guidelines for granite triangular squares to help clients preserve original gauge accuracy for a long time.
Selecting the proper storage environment is the top priority. Although high-density black granite features outstanding thermal stability, the gauge cannot be stored arbitrarily. The storage area shall be dry and well-ventilated to avoid abrupt local temperature changes. Keep the gauge away from welding machines, heating equipment, direct sunlight and direct airflow from air conditioners. Uneven local temperatures create thermal gradients inside the stone, and persistent thermal stress gradually distorts the reference surface. Besides, the storage zone must stay far from strong vibration sources such as stamping and cutting machines. Continuous low-frequency vibration impacts the gauge and accumulates subtle internal stress over time, damaging the nanometer-level reference surfaces finished by manual lapping.
Support and placement are the most commonly neglected factors. Granite triangular squares cannot be laid directly on concrete floors or simple workbenches, nor leaned against walls. Special vibration-damping supports with three-point mounting are recommended. Support points must be reasonably arranged to ensure uniform stress distribution and avoid partial suspension or single-point load. Uneven supports create persistent internal stress from gravity, which may cause flatness and angular deviations after months of storage. Do not stack multiple gauges, and never place wrenches, cutting tools or metal workpieces on the reference surface of triangular squares. Hard object extrusion or impact will result in chipping and pits. Once the reference surface gets damaged, accuracy cannot be restored.
Dust prevention and surface protection are also essential. Tiny dust particles, metal debris and oil stains attached to lapped surfaces seem trivial, yet they will scratch high-precision reference surfaces in subsequent measurement work. After each use, wipe the reference surface with lint-free cloth and neutral detergent to remove debris and oil. Cover the gauge with a dedicated dust cover or put it into a custom protective case only after the surface is fully dried. Humidity in storage space needs to be controlled. Corrosive impurities in humid air gradually adhere to the stone surface and alter micro-topography over time, undermining the stability of measurement readings.
Material handling rules should be integrated into gauge storage management. When moving granite triangular squares, dragging or gripping the edges with one hand is prohibited to prevent collision with hard objects during transport. Register every gauge when it enters or leaves storage, and regularly inspect supports for settlement or deformation. For triangular squares idle for more than six months, precision re-verification in metrology labs is mandatory before reuse. Inspect flatness and perpendicularity using world-class instruments including Mahr, Renishaw and Wyler. The gauge can only be put back into service after meeting metrology standards such as DIN, ASME and GB. 
Some low-cost products on the market are made of marble. This porous material with loose mineral structure has low tolerance for poor storage conditions, leading to rapid accuracy drift. ZHHIMG adopts black granite with a density of around 3100 kg/m³. Raw stone has undergone sufficient natural aging to fully release internal stress. The gauges are manually lapped by veteran craftsmen in thermostatic, constant-humidity dust-free workshops. All measuring instruments for factory inspection are traceable to national metrology benchmarks. Even so, strict storage rules are still required to retain micron-level benchmark accuracy.
In summary, the core principles for storing granite triangular squares are stable temperature & vibration isolation, proper supporting, dust protection and periodic re-calibration. Proper storage practices help retain factory benchmark accuracy, extend service life, and reduce comprehensive costs caused by repeated procurement and frequent recalibration. It continuously delivers stable and reliable angular metrology benchmarks for semiconductor, laser inspection, new energy precision testing and other industries.
Post time: Sep-11-2026