UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Hole Saws: Toothed Strip Rolled into a Cup
A hole saw is a steel cup with teeth on its rim, driven by an arbor that carries a pilot drill at the centre. One method starts from flat strip: the teeth are stamped and then ground along one edge, the strip is bent into a tube with the teeth at one end, the seam is welded and its bead ground off, the tube is heat-treated to harden the teeth, and a cap is fitted. Better saws are bi-metal: a carbon steel cup with high-speed steel teeth welded on.
Hejuru
Factory process
Amabwiriza
1
1
Stamp and grind the teeth
Stamp and grind the teeth
Cut strip to length, stamp out the teeth along one edge and grind them.
Ibikoresho by'iyi ntambwe:
Umugozi mugari w'icyuma cya karubone0.2 kgIbikoresho bikenewe:
Imashini ikanda itobora
Imashini ihyeza yo ku meza2
2
Roll and weld
Roll and weld
Bend the strip into a tube with the teeth at one end, weld the seam and grind off the bead.
Ibikoresho bikenewe:
Imashini isudira umurongo w'umuyoboroImashini ihyeza yo ku meza3
3
Harden
Harden
Heat-treat the tube to harden the teeth.
Ibikoresho bikenewe:
Itanura ryo gukomeza no gusubiza umugozi mugari4
4
Cap and arbor
Cap and arbor
Fit the cap; the saw is driven by an arbor carrying the pilot drill.
Ibikoresho by'iyi ntambwe:
Umurizo w'igisatuzo cy'umwobo ufite burende iyobora1 igiceIbikoresho
2- Umwanya
- Umwanya
Ibikoresho bikenewe
4- Umwanya
- Umwanya
Iki gishushanyo gikora
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