Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
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.
Hejuru
100+ hours firing, a week cooling
Amabwiriza
1
1
Mix and mould
Mix and mould
Mix suitable clays and fluxes with the abrasive grain and mould the wheels. Not given: proportions.
Ibikoresho by'iyi ntambwe:
Umusenyi wo guhana wa oksidi ya alumini1 igice
Ibumba rya ball clay1 igice
Igice cya feldispati1 flux
Amazi1 igiceIbikoresho bikenewe:
Iseti y'ibikombe byo kuvanga
Igishushanyo
Inyundo y'Igiti2
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.
Ibikoresho bikenewe:
ItanuraIbikoresho
4- Umwanya
- 1 igiceUmwanya
- 1 fluxUmwanya
- 1 igiceUmwanya
Ibikoresho bikenewe
4- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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