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Forged Cold Chisel
Forge

Dicipta oleh

Forge

11. Oktober 2026NO
27
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Forged Cold Chisel

A cold chisel cuts cold metal, so its edge must be hard and its body tough. It is forged from octagonal tool steel: the head end is tapered, the blade drawn out at a yellow heat and finished with a flatter just above the hardening heat. Only the edge is hardened, by dipping it in water while the body stays hot, and the heat left in the body then tempers the edge; it is cooled when the edge shows blue tinged with red, about 570 °F (300 °C). The edge is ground to 60°.
Pertengahan
1–2 hours

Arahan

1

Taper the head

Heat the head end to a yellow heat and taper it.

Bahan untuk langkah ini:

Bar keluli alat segi lapanBar keluli alat segi lapan1 keping

Alatan diperlukan:

Relau tukang besiRelau tukang besi
AndasAndas
Tukul TempaTukul Tempa
Penyepit tukang besiPenyepit tukang besi
2

Forge the blade

At a yellow heat, draw out the other end into the blade over the anvil's edge. Finish with a flatter just above the hardening heat; hammering it when black crushes the grain.

Alatan diperlukan:

Perata tempaanPerata tempaan
Tukul TempaTukul Tempa
AndasAndas
3

Cut and cool slowly

Cut the end square, or nick it and break it off after hardening to see the grain. Let the chisel cool slowly to relieve stresses from the forging.

Alatan diperlukan:

Pahat panasPahat panas
4

Harden the edge

Reheat about 3 inches back from the edge, the edge kept high in the fire. Lower the edge into clean water at about 70 °F, moving it, until about half the heated part is under; plunge briefly and lift out with heat left in the body.

Alatan diperlukan:

Relau tukang besiRelau tukang besi
Baldi pelindapkejutanBaldi pelindapkejutan
Penyepit tukang besiPenyepit tukang besi
5

Temper

Polish the edge and watch the colours run down to it. When the edge is blue tinged with red, cool the chisel completely.

Alatan diperlukan:

Kain emeriKain emeri
Baldi pelindapkejutanBaldi pelindapkejutan
6

Grind

Grind the cutting edge to an angle of 60°.

Alatan diperlukan:

Pengisar mejaPengisar meja

Bahan

1

Alatan Diperlukan

9

CC0 Domain Awam

Blueprint ini dikeluarkan di bawah CC0. Anda bebas menyalin, mengubah, mengedar, dan menggunakan karya ini untuk sebarang tujuan, tanpa meminta kebenaran.

Sokong Pembuat dengan membeli produk melalui Blueprint mereka di mana mereka memperoleh Komisen Pembuat ditetapkan oleh Penjual, atau cipta iterasi baru Blueprint ini dan sertakan ia sebagai sambungan dalam Blueprint anda sendiri untuk berkongsi hasil.

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