UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Forged Lathe Cutting-Off (Parting) Tool
A cutting-off or parting tool cuts a narrow groove in work turning on a lathe, and so cuts it off. It is forged from 1/2 × 1-inch tool steel 7 inches long, with a thin blade about 1½ inches long set flush with one side of the bar. Because it cuts only at its very end, the blade is made thickest at the edge and tapers back, so its sides clear the groove. It is hardened like a cold chisel and tempered to light yellow.
Hagati
1–2 hours
Amabwiriza
1
1
Cut and mark
Cut and mark
Cut the stock to length and centre-punch it.
Ibikoresho by'iyi ntambwe:
Inkoni iringaniye y'icyuma cy'ibikoresho1 igiceIbikoresho bikenewe:
Igicukuzi cyo Gushyira Ikimenyetso
Icyuma gikata gishyushye2
2
Draw out the blade
Draw out the blade
Mark with a 1/2-inch fuller and draw out the blade, fullered side down, with a hand hammer on the anvil's rounded edge or under a trip hammer.
Ibikoresho bikenewe:
Uruganda rw'umucuzi
Fuller (icyuma cyo gucukura imirongo)
Inyundo yo Gucura
Inyundo izamurwa ikagwa
Amafashi y'umucuzi3
3
Taper the sides
Taper the sides
Taper the sides of the blade so it is thickest at the cutting end, giving clearance in the groove.
Ibikoresho bikenewe:
Inyundo yo Gucura
Ingoyi4
4
Trim
Trim
Cut off the end of the blade at an angle with a hot chisel.
Ibikoresho bikenewe:
Icyuma gikata gishyushye5
5
Harden and temper
Harden and temper
Harden the blade the same way as a cold chisel; heat it back past the blade and cool only the blade, then polish and let the colours run until the tip is light yellow, and cool it.
Ibikoresho bikenewe:
Uruganda rw'umucuzi
Indobo yo gukonjesha
Umwenda wa emeriIbikoresho
1- Umwanya
Ibikoresho bikenewe
10- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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