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Needle File Set: Six Small Files Cut by Hand
Needle files are small files for fine work, where a good finish matters more than speed, sold in sets of shapes: pillar, half round, barrette, square, round and triangular. They are made like any file, only smaller and with finer teeth: forged, annealed, cut tooth by tooth with a chisel, and hardened in brine.
The picture: our diagram, six tapered needle files and their cross-sections.
Ilọsíwájú
Three days
Ìlànà
1
1
Forge six blanks
Forge six blanks
Draw tool steel to six thin blanks, each with a tapered part for the teeth and a round handle part. Shape the sections in the swage block: pillar (narrow flat), half round, barrette, square, round and triangular.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Ọ̀pá onígun mẹ́jọ irin irinṣẹ́0.15 kg
Èédú2 as requiredÀwọn irinṣẹ́ tí a nílò:
Ìléru alágbẹ̀dẹ
Ìdí Alágbẹ̀dẹ
Òòlù olórí ìtẹ̀ ìpakà
Bulọ́ọ̀kì ìṣẹ̀dá oníhò
Ẹmú alágbẹ̀dẹ
Ìbọ̀wọ́ wẹ́lídìn
Gíláàsì ààbò2
2
Anneal and true
Anneal and true
Anneal the blanks: no hotter than blood red, cooled very slowly out of the air. Grind and file the faces true, or the teeth will not be even.
Àwọn irinṣẹ́ tí a nílò:
Ìléru alágbẹ̀dẹ
Òkúta ìpọ́n oníkẹ̀kẹ́
Ìfá Irin3
3
Cut the teeth
Cut the teeth
Raise fine teeth with the file-cutting chisel, one blow and a small even step at a time, under a loupe. Turn each blank on the pewter plate to cut the next face. On the barrette cut only the flat face; leave the other sides smooth (safe).
Àwọn irinṣẹ́ tí a nílò:
Ìlù ìgé eyín fáìlì
Òòlù olórí ìtẹ̀ ìpakà
Ìdí Alágbẹ̀dẹ
Àwo pewutà
Lúpù Ìgbéga4
4
Harden, do not temper
Harden, do not temper
Heat each file evenly to its hardening heat and plunge it into cold brine. Then reheat the handle part alone so it is not glass-hard.
Àwọn ohun èlò fún ìgbésẹ̀ yìí:
Iyọ̀0.5 kg
Omi5 lítàÀwọn irinṣẹ́ tí a nílò:
Ìléru alágbẹ̀dẹ
Bàkẹ́ẹ̀tì
Ẹmú alágbẹ̀dẹ
Ìbọ̀wọ́ wẹ́lídìn
Gíláàsì ààbò5
5
Steel for a set of six
Steel for a set of six
Ń ṣí ìwé Jupyter…
Àwọn ohun-èlò
4- Àyè
- 2 as requiredÀyè
- 0.5 kgÀyè
- 5 lítàÀyè
Àwọn irinṣẹ́ tó nílò
13- Àyè
- Àyè
- Àyè
- Àyè
- Àyè
Ìtọ́nisọ́nà yìí ń ṣe
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