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Steel Needle: Pointed, Eyed, Hardened in Oil and Tempered
Tarasna0922 (Wikimedia Commons) · CC BY-SA 4.0
Forge

Imeundwa na

Forge

18. Oktoba 2026NO
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Steel Needle: Pointed, Eyed, Hardened in Oil and Tempered

Needles are made from good steel wire: cut, straightened, pointed, flattened and pierced for the eye, hardened by heating and plunging into oil, then tempered back to a springy hardness, scoured and polished (Bucknall Smith, A Treatise upon Wire, 1891). This is the same sequence by hand, one heavy needle at a time from piano wire; the hand methods and sizes are ours. The picture: steel sewing needles (Wikimedia Commons).
Kati
Half a day

Maagizo

1

Cut, soften and straighten

Cut 70 mm of 1.2 mm piano wire. Heat it to red in the forge and let it cool slowly in the ashes so it can be filed and drilled, then roll it straight on the anvil.

Vifaa kwa hatua hii:

Waya wa pianoWaya wa piano70 mm

Zana zinazohitajika:

Koleo la kukata waya la pembeKoleo la kukata waya la pembe
Fua ya mhunziFua ya mhunzi
Koleo za mdomo mwembambaKoleo za mdomo mwembamba
FuaweFuawe
2

Point

Clamp it in the vise and file a long, even taper to a sharp point, turning the wire as you go.

Zana zinazohitajika:

Seti ya tupaSeti ya tupa
Kibano cha meza ya kaziKibano cha meza ya kazi
Miwani ya usalamaMiwani ya usalama
3

Flatten and pierce the eye

Flatten the head end slightly on the anvil, drill the eye through the flat with the finest bit, then file off the burrs and round the head.

Zana zinazohitajika:

FuaweFuawe
Nyundo yenye kichwa cha msalabaNyundo yenye kichwa cha msalaba
Kekee cha mkonoKekee cha mkono
Seti ya tupaSeti ya tupa
Kibano cha meza ya kaziKibano cha meza ya kazi
Miwani ya usalamaMiwani ya usalama
4

Harden in oil

Heat the needle evenly to red and plunge it into the oil. It is now glass-hard and brittle.

Zana zinazohitajika:

Fua ya mhunziFua ya mhunzi
Koleo za mdomo mwembambaKoleo za mdomo mwembamba
Tangi la kupoza lenye mafutaTangi la kupoza lenye mafuta
Miwani ya usalamaMiwani ya usalama
5

Temper

Reheat it in the oven to about 600 °F (315 °C) and let it cool slowly to a springy temper. If it came out crooked, straighten it with light blows of a small hammer on the anvil.

Zana zinazohitajika:

Tanuri ya kutibu kwa jotoTanuri ya kutibu kwa joto
Themokapo yenye kionyeshiThemokapo yenye kionyeshi
FuaweFuawe
Nyundo yenye kichwa cha msalabaNyundo yenye kichwa cha msalaba
6

Scour and polish

Scour it bright with emery cloth, a little oil and soap. Wash it in hot water, dry it in sawdust, touch up the point, and polish it on the leather strop.

Zana zinazohitajika:

Kitambaa cha emeriKitambaa cha emeri
Mafuta ya zeituniMafuta ya zeituni
SabuniSabuni
Vumbi la msumenoVumbi la msumeno
Ukanda wa ngozi wa kunoaUkanda wa ngozi wa kunoa
Seti ya tupaSeti ya tupa

Vifaa

1

Zana Zinazohitajika

17

Mchoro huu unatengeneza

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Kishikilia nafasi

Sindano ya chuma

Free

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1

Blueprint zinazohusiana

Blueprint hizi zinashiriki maarifa — mbinu, vifaa au kanuni

Steel Wire Drawn from Mild Steel Rod

Steel Wire Drawn from Mild Steel Rod

na ForgeNO

Uchimbaji chuma

38
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Quench Hardening and Tempering a Steel Blade — Heat Treatment Fundamentals

Quench Hardening and Tempering a Steel Blade — Heat Treatment Fundamentals

na ForgeNO

Kale

78
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0
0
2
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