A wide range of prehistoric artifacts were formed by pecking, grinding, or polishing one stone with another. Ground stone tools are usually made of basalt, rhyolite, granite, or other macrocrystalline igneous or metamorphic rocks, whose coarse structure makes them ideal for grinding other materials, including plants and other stones.
Speno International specialises in rail maintenance worldwide. Our company’s activities include a full range of services from research and development through to the construction and operation of the machines needed for: grinding and re-profiling of tracks and points, measuring rail surface faults and profiles, checking for internal rail ...
Our Sharpening Stone Grit Chart After discussing the topic of grit coarseness and fineness we decided to come up with our own chart. Since one person's "fine" and one manufacturers "fine" may mean something completely different we established a 1 to 10 grit chart with 1 being the most coarse and 10 being the most fine.
Grinding Wheel. Manufacturer of a wide range of products which include mop wheel - spindle flap abrasive for pencil die grinder, mounted point grinding stone, polishing n backing pad - rubber, pvc wool for shining buff, abrasive grinding wheels - grindwell norton, diamond flat grinding cup wheel - granite marble stone and depressed center ...