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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.
Abantado
100+ hours firing, a week cooling
Mga Tagubilin
1
1
Mix and mould
Mix and mould
Mix suitable clays and fluxes with the abrasive grain and mould the wheels. Not given: proportions.
Mga materyales para sa hakbang na ito:
Panggasgas na butil ng aluminum oxide1 piraso
Ball clay1 piraso
Kapirasong feldspar1 flux
Tubig1 pirasoMga kailangang kasangkapan:
Set ng mangkok na panghalo
Hulmahan
Kahoy na Pamukpok2
2
Fire and cool
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.
Mga kailangang kasangkapan:
PugonMga Materyales
4- Placeholder
- 1 pirasoPlaceholder
- 1 fluxPlaceholder
- 1 pirasoPlaceholder
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