Grinding Wheel: Vitrified, Clay-Bonded (Machinery's Handbook, 1924)

The common machine-shop wheel: abrasive grains held in a bond of clay and fluxes, moulded and fired until the clay partly melts and vitrifies. Porous and free-cutting, unaffected by water, acids, oils, heat or cold. Source: Machinery's Handbook (1924), pp. 1101-1102. Unknown: proportions and temperatures. Picture: the handbook's text.

高级

100+ hours firing, a week cooling

说明

Mix and mould

Mix suitable clays and fluxes with the abrasive grain and mould the wheels. Not given: proportions.

此步骤所需材料：

氧化铝磨料砂1 个

球土1 个

长石块1 flux

水1 个

所需工具：

搅拌盆套装

模具

木槌

Fire and cool

Burn the wheels continuously for 100 hours or more, longer for bigger wheels, raising the heat gradually until the clay partly melts and vitrifies. Cool slowly for a week, guarding against sudden temperature changes; as it cools the clay binds the grains.

所需工具：