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TEKNOLOGI
BOLEH PAKAI
Straight Razor: a Blade Forged from 75-Point Carbon Steel and Hollow Ground (Holford, 1907)
A straight razor forged by hand. Frederick Holford's 20th Century Toolsmith (1907) takes steel 3/16 by 7/16 inch of about 0.75 % carbon, fullers the shank for the finger hold, bends the blade a little edgewise and then forges, hammers and hardens it the way he makes butcher knives, drawing the temper to purple. The razor is hollow ground after tempering, by an expert, without drawing the temper; made so, he says, it "will hold a very keen edge, which will equal any razor manufactured".
He gives no blade length and does not describe the scales or the pivot; those are unknown here.
Source: F. J. Holford, The 20th Century Toolsmith and Steelworker (1907), p. 176 (razor), pp. 80-82 (butcher knives, for forging and hardening), p. 21 (the hardening bath). Picture: his Fig. 106.
Lanjutan
A day
Arahan
1
1
Read Holford
Read Holford
"To make an ordinary razor use steel 3-16 by 7-16 of about 75 points carbon."
2
2
Fuller the shank and shape
Fuller the shank and shape
Fuller the shank in a little for the finger hold and forge it to shape, then form the blade by bending the steel a little edgewise (Fig. 106). The blade length is not given (unknown).
Bahan untuk langkah ini:
Bar keluli alat leper1 bar, 3/16 x 7/16 inAlatan diperlukan:
Relau Tempa
Andas
Tukul tukang besi
Fuller (besi pembuat lurah)
Penyepit tukang besi
Dimensi tidak diketahui3
3
Draw the edge and pack the steel
Draw the edge and pack the steel
As for a butcher knife: at a deep red heat draw the edge thin, hammering evenly from both sides on the inside of the bend, until the bend has come out and the blade is straight. Then at a very low heat hammer equally on both flat sides of the edge to refine and pack the steel; heat again to the same low heat and hammer the centre of the blade, both sides evenly, its full length. Cool and file the edges straight.
Alatan diperlukan:
Relau TempaAndasTukul tukang besi
Kikir Logam4
4
Harden
Harden
Make the fire long so more of the blade heats at once. Put the blade in edge down and move it back and forth for an even heat along its length, just hot enough to harden. Plunge it lengthwise, edge down, into the hardening bath (Holford p. 21: clean water, best made a brine with as much salt as it will dissolve, large and cold) and cool entirely.
Alatan diperlukan:
Relau TempaPenyepit tukang besi
Larutan garam tepu
Sarung Tangan Tahan Haba5
5
Temper to purple
Temper to purple
Brighten one side. Hold the blade flat about 2 inches above the fire, bright side up, never on the coals, and heat it very slowly, moving it back and forth for an even temper, until the bright side shows purple.
Alatan diperlukan:
Kain emeriRelau Tempa6
6
Hollow grind and hone
Hollow grind and hone
Hollow grind the blade after tempering, taking care never to draw the temper while grinding; Holford says this should be done by an expert. Then hone the edge.
Alatan diperlukan:
Batu canai roda
Batu asah7
7
Scales
Scales
A straight razor folds into a pair of scales on a pivot through the hole in the shank (Fig. 106). Holford does not describe the scales or the pivot; their material and making are unknown here.
Bahan untuk langkah ini:
Bahan tidak diketahui1 scales and pivot8
8
History and honest limits
History and honest limits
Holford's razor uses the same steel as his butcher knives and harnessmaker's knife, about 0.75 % carbon, but a harder temper: purple instead of the knives' blue.
Blade length, scales and pivot are not given; a flat tool steel bar stands for the 3/16 by 7/16 inch bar of 0.75 % carbon steel.
Bahan
2- 1 bar, 3/16 x 7/16 inPemegang Tempat
- 1 scales and pivotPemegang Tempat
Alatan Diperlukan
12- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
- Pemegang Tempat
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