In ultra-precision equipment manufacturing, most procurement and R&D personnel hold biased perceptions about the machining capacity of CNC granite components. It is widely believed that granite, though hard yet brittle, can only be fabricated into simple unstructured and unperforated parts such as flat plates and reference rulers. Complex profile precision machining like slotting and drilling is considered unfeasible. Once holes or slots are processed, chipping, cracking, dimensional deviation and structural stability failure tend to occur. In fact, the machining logic for high-end precision CNC granite differs fundamentally from ordinary stone processing. With exclusive precision procedures and customized techniques, UNPARALLELED CNC granite components can achieve high-precision, damage-free slotting and drilling to perfectly meet the structural assembly requirements of various premium precision equipment.
Conventional slotting and drilling at ordinary stone processing plants mostly adopt rough cutting and percussion drilling. These processes only focus on shaping the exterior while ignoring granite's stress characteristics. Such conventional machining leaves numerous invisible microcracks and residual stress along hole walls and slot edges. These hidden defects remain undetected in the short term. However, once the components are installed and operated under high-speed, high-frequency and temperature-fluctuating precision working conditions, residual stress will continuously release and cracks gradually propagate. This eventually leads to benchmark offset, intensified vibration and precision failure of equipment, which explains why many precision equipment manufacturers hesitate to adopt ordinary granite parts with holes and slots.
To achieve damage-free precision slotting and drilling on granite, both premium base material and refined machining technology are indispensable. Rejecting low-grade marble and miscellaneous granite widely used across the industry, UNPARALLELED adopts self-developed UNPARALLELED® high-density black granite base material. It features a dense, uniform structure free of impurities, pores and internal stress, naturally overcoming the drawbacks of ordinary stone such as fragility and deformation. This lays an ideal foundation for machining complex hole and slot structures. With a density of 3100kg/m³, the base material delivers outstanding impact and deformation resistance. Surface peeling and deep hidden cracks rarely emerge during processing, making it suitable for forming various high-precision holes and slots.
Equipped with a full set of internationally advanced CNC machines and ultra-large tonnage production capacity, the brand offers custom machining of diverse, high-difficulty granite slots and holes. Drilling covers tiny micro holes, precision through holes, countersunk mounting holes, stepped positioning holes, pre-embedded thread holes, dedicated air bearing holes and other diversified structures. Hole diameter tolerance is tightly controlled at the micron level, with smooth hole walls free of burrs, edge chipping and hidden cracks. For slotting, T-shaped fixture grooves, precision positioning grooves, equipment wiring grooves, air flue diversion grooves, dovetail assembly grooves and other profiled grooves can be precisely machined. The straightness, flatness and parallelism of grooves meet ultra-precision metrology standards, directly satisfying core application demands including equipment module assembly, cable routing, airflow transmission and fixture positioning.
All slotting and drilling procedures are completed in a closed 10,000-class constant-temperature, constant-humidity and dust-free workshop. A low-stress, progressive precision machining process is adopted throughout, completely replacing the brute-force cutting method used by ordinary stone factories. At the roughing stage, low-speed uniform feed is applied to strip stone layer by layer and release machining stress slowly, preventing internal damage caused by instantaneous impact. Semi-finishing accurately revises the contour of holes and slots and optimizes structural regularity. Finishing uses exclusive diamond precision cutting tools and nanoscale grinding technology to polish and reshape hole walls, slot edges and slot bottoms, removing machining marks and ensuring dimensional precision and surface finish. Meanwhile, the workshop is built with dedicated anti-vibration structures and silent processing equipment to eliminate external vibration interference and guarantee forming stability of every hole and slot.
After forming, slotted and perforated granite components undergo comprehensive inspection and calibration with imported high-end metrology instruments. Relying on world-leading inspection tools from Germany Mahr, Japan Mitutoyo, Switzerland WYLER and UK Renishaw, alongside a calibration system compliant with multiple national metrology standards, key parameters including hole coordinates, aperture tolerance, form and position tolerance of slots and surface roughness are verified item by item. All inspection data is traceable to national metrology standards. Unlike rough quality checks focusing merely on appearance adopted by ordinary manufacturers, the brand prioritizes detection of hidden defects such as microcracks and residual stress in machined areas to fully guarantee component quality.
CNC granite components processed by precision slotting and drilling retain the core performance of the base material. Rational layout of holes and slots and scientific machining procedures fully preserve granite's inherent advantages of low thermal expansion, high vibration damping, high rigidity and corrosion resistance, without deterioration in thermal stability or vibration damping performance. Integrated granite components with holes and slots eliminate the need for extra metal adapters and assembled base plates, avoiding cumulative errors and structural loosening brought by multi-part assembly, and greatly boosting overall rigidity and precision stability of precision equipment.
Currently, these custom slotted and drilled precision granite components are widely deployed in high-end applications including semiconductor precision etching equipment, PCB micro-hole processing machines, coordinate measuring machines, laser precision processing equipment, linear motor motion platforms, new energy lithium battery inspection equipment and industrial optical inspection equipment. Diversified precision hole and slot structures precisely fulfill multiple functional requirements such as module locking, air flue transmission, fixture positioning, cable arrangement and precision inspection, delivering integrated, highly stable and high-precision granite structural solutions for ultra-precision equipment.