The raw cutting, CNC milling and precision grinding stages do not mean a granite base is already finished. For ultra-precision granite reference bases used in precision equipment, machining is merely the middle stage of the manufacturing process. After machining, a series of critical post-processing procedures follow, each of which directly affects the dimensional stability, surface protection capability and final measurement accuracy of the stone component over long-term use. This is also the core difference that sets high-end ultra-precision granite components apart from ordinary stone products. After precision grinding, UNPARALLELED® executes multiple standard post-processing procedures to eliminate potential hidden risks brought by machining, ensuring all indicators remain stable and compliant when products are delivered to customers worldwide.
The first core procedure is aging stability treatment. During quarrying, cutting and grinding, residual stress remains inside the stone. Without stress relaxation, the base may undergo slight deformation slowly during subsequent storage, transportation and use, damaging flatness and geometric tolerances. Many low-cost manufacturers omit the prolonged aging period and ship products immediately after machining. No problem appears in the short term, but precision drifts within months after the equipment is put into use. UNPARALLELED places machined granite bases in a constant-temperature environment for prolonged natural aging, gradually releasing internal residual stress so the internal structure of the stone becomes stable, eliminating the risk of later deformation from the source.
After aging, the process enters surface cleaning and micro-pore sealing. Even though granite is dense, micro-pores remain on the surface after precision machining. Cutting fluid, oil and dust in the workshop can seep into micro-pores once they enter, gradually contaminating the reference surface and increasing the difficulty of customer assembly and maintenance. The sealing treatment forms an extremely thin protective layer on the component surface that does not affect flatness precision, while blocking oil, dust and corrosion penetration, improving the base's dirt resistance and corrosion resistance. After treatment, a thorough cleaning is carried out to remove all grinding residues and dust, with deep cleaning of slots, edges and embedded T-slot interiors, leaving no grinding debris behind.
Next comes full-dimensional metrology inspection, a crucial link in post-processing. Machining completion does not mean precision is qualified; a complete set of geometric tolerance checks must be performed with high-precision measuring instruments. The inspection covers all technical indicators including flatness, straightness, parallelism, perpendicularity, T-slot position tolerance and thickness dimensions. Measurement is conducted in a constant-temperature, vibration-isolation workshop using internationally branded measuring instruments, all traceable to national metrology standards. Once a minor local deviation is detected, the component returns for fine lapping until all indicators meet customer drawings as well as international precision standards such as DIN, ASME and JIS. Non-conforming products never flow to the next stage.
After passing inspection, surface appearance recheck and chamfer deburring are carried out. Edges sharpened by grinding can easily chip or crack during handling and assembly and may also scratch operators. Workers apply uniform chamfering to all edges of the base, eliminating sharp corners without affecting reference surface precision and reducing the risk of collision damage during transportation and assembly. A full visual inspection of the component surface is also conducted to identify scratches, chips, pits and other appearance defects, ensuring product appearance quality meets the requirements of high-end optical and semiconductor equipment.
Afterwards, the process enters protective packaging and fixation. Granite bases are high-density and heavy. During long-distance sea or land transportation, bumps and shocks can easily cause edge chipping. The packaging stage adopts customized cushioning protection solutions, with individual protection for the reference working surface, T-slots and precision edges to prevent frictional scratches on the reference surface during transport. Large bases are paired with dedicated fixation tooling to restrict component displacement inside the packaging box and prevent impact stress during lifting and transfer. After packaging, product inspection reports and calibration certificates are attached for convenient acceptance and archiving by customers upon receipt.
Before products reach the customer site, final re-inspection and documentation archiving are performed. A final re-measurement is carried out before packing and shipping to re-verify key precision indicators, confirming that precision has not changed after aging, cleaning and transfer preparation. The inspection data, calibration records and machining serial number of every product are uniformly archived to form a complete product history. Later, when customers assemble equipment, perform periodic metrology calibration or retrofit equipment, they can retrieve the original data at any time for precision comparison and maintenance.
Many buyers hold a misconception that the finished product is obtained once grinding ends. In reality, a large part of the value of ultra-precision granite bases lies in the entire post-processing workflow after machining. Aging for stress relief, micro-pore sealing, full-dimensional metrology, edge protection and professional packaging are interlocked and indispensable. UNPARALLELED strictly follows the complete post-processing specifications, upholding the rigorous standards of precision manufacturing, ensuring every granite base arrives at customer factories worldwide with stable precision and intact condition, ready for direct integration into semiconductor equipment, CMMs, laser systems and new energy inspection equipment.