煅烧阿尔法氧化铝粉等材料为原料，经过配料、研磨、制粉（制浆、制泥）、成型、干燥、烧成等工序制作而成的，主要作为研磨介质而被广泛使用的球石。根据不同的氧化铝含量，可以分为中铝球、中高铝球和高铝球。 　　
一般把60%—65%氧化铝含量的划为中铝球，75%—80%氧化铝含量的称为中高铝球，90%以上氧化铝含量的为高铝球。其中高铝球又细分为90瓷、92瓷、95瓷和99瓷。99瓷由于其极高的生产成本而很少有大型厂家大批量制造，目前主要为部分特种陶瓷厂通过手工制作。 　　
中铝球和中高铝球由于其较低的价格，而被大部分陶瓷厂所接受，主要用于研磨陶瓷坯料。高铝球由于其具有高强度、高硬度、高耐磨性，比重大、体积小、耐高温、耐腐蚀、无污染等优异特性而被广泛的运用于不同类型的陶瓷、瓷釉、玻璃、化工等等工厂的厚硬材质精加工和深加工，其中尤以92含量的高铝球使用为普遍。（图/文www.cddnvga.cn）
中译英：
The roll should be cleaned after use, use plastic film to colloidal packets together, on the roller frame, must not be a casual stacked in a vertical or conveniently on side wall, so as to allow the gel to get not due loss. Waste rubber processing casting them in the transportation process, avoid abandonment pressure or weight of chaos, to maintain the roll core not partial core, do not bend, in order to ensure the normal use of the roller core.

Rotary cutting machine general large volume and complicated in structure, the former need log centering, if centering not, began peeling will spin out the intermittent veneer strips or narrow single board. Cots with metal or other material as core, rubber covered by vulcanization and made of roller products. New casting roller is not immediately put into use.