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.

고급

100+ hours firing, a week cooling

안내

Mix and mould

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

이 단계의 재료:

산화알루미늄 연마 입자1 개

볼클레이1 개

장석 덩이1 flux

물1 개

필요한 도구:

믹싱 볼 세트

거푸집

나무 망치

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.

필요한 도구: