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TEKNOLOGI
PERANGKAT PAKAI

Forged Geologist's Pick
A geologist's pick of about 2½ pounds, with a square striking head on one side of the eye and a long curved point on the other, forged from 1¼ × 1¾-inch tool steel. After the eye is punched, the bar is cut part way through beside it with a hot chisel and the waste cut away, then each end is drawn out, under a power hammer in the original. The point is hardened like a cold chisel and tempered to dark blue; the head is then hardened about 2 inches back and tempered to brown or dark straw, with damp coal round the point so it is not softened again.
Lanjutan
4–6 hours
Instruksi
1
1
Mark and punch
Mark and punch
Mark the stock with a centre punch and chisel, and punch the hole for the eye.
Material untuk langkah ini:
Batang baja perkakas pipih1 buahAlat yang dibutuhkan:
Penitik
Perapian pandai besi
Landasan Tempa
Pelubang panas
Tang pandai besi2
2
Cut beside the eye
Cut beside the eye
With a drift in the eye, flatten the sides. Cut part way through 3/16 inch from the edge of the hole on both sides, round the bottom of the cuts with a thin fuller, and cut out the waste.
Alat yang dibutuhkan:
Pelebar lubang tirus
Pahat panas
Fuller (besi pembuat parit)3
3
Draw out the ends
Draw out the ends
Draw out one end, cut the pick from the bar, then draw out the other end to the point's form.
Alat yang dibutuhkan:
Palu tempa nok
Godam4
4
Finish the head and point
Finish the head and point
With the drift in the eye, smooth around it with a set hammer. Finish the head with set hammer and flatter and cut it square from four sides; finish the point with a flatter and cut it to length. Grind face and point.
Alat yang dibutuhkan:
Palu set pandai besi
Perata tempa
Pahat panas
Gerinda duduk5
5
Harden and temper
Harden and temper
Harden the point like a cold chisel and temper it to dark blue. Then heat about 2 inches of the head, keeping damp coal around the point, harden it the same way and temper it to brown or dark straw.
Alat yang dibutuhkan:
Perapian pandai besi
Ember pendingin tempa
Tang pandai besi
Kain emeri6
6
Handle
Handle
Shave the handle stock to fit the eye tightly, drive the head on, saw a kerf in the handle's top and drive a glued hardwood wedge into it. Trim flush and oil the handle.
Material untuk langkah ini:
Kayu Keras Bahan Gagang1 buah
Pasak kayu keras1 buah
Minyak Biji Rami10 mlAlat yang dibutuhkan:
Ketam lengkung
Gergaji lintang dua orang
Ragum MejaBahan
4- Placeholder
- 1 buahPlaceholder
- 1 buahPlaceholder
- 10 mlPlaceholder
Alat yang Diperlukan
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