UBUCIKO
UBUHLE NEMPILO
UBUCIKO BEZANDLA
AMASIKO NOMLANDO
EZOKUZIJABULISA
IMVELO
UKUDLA NEZIPHUZO
REVERSE ENGINEERING
IZAYENSI
EZEMIDLALO
UBUCHWEPHESHE
IZINTO EZIGQOKWAYO
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.
Osezingeni eliphezulu
Factory process
Imiyalelo
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.
Izinto zokwakha zalesi sinyathelo:
Umucu wensimbi enekhabhoni0.2 kgAmathuluzi adingekayo:
Umshini wokubhoboza
Umshini wokugaya wetafula2
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.
Amathuluzi adingekayo:
Umshini wokushisela umthungo weshubhuUmshini wokugaya wetafula3
3
Harden
Harden
Heat-treat the tube to harden the teeth.
Amathuluzi adingekayo:
Isithando sokuqinisa nokuthambisa umucu4
4
Cap and arbor
Cap and arbor
Fit the cap; the saw is driven by an arbor carrying the pilot drill.
Izinto zokwakha zalesi sinyathelo:
I-arbor ye-hole saw enesibhoboro esiqondisayo1 ucezuIzinto
2- Isibambeli
- Isibambeli
Amathuluzi Adingekayo
4- Isibambeli
- Isibambeli
- Isibambeli
- Isibambeli
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