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Plate Shears: Bench Shears Made from a Flat File (Shop Notes, 1919)
Popular Mechanics Co. · Public domain (published 1919)
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4. Ugushyingo 2026NO
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Plate Shears: Bench Shears Made from a Flat File (Shop Notes, 1919)

Bench shears for sheet metal too heavy for hand snips: a 14 in flat file, ground and sharpened, works as a lever knife bolted against a fixed cutter forged from scrap steel and fastened to the bench. Source: Popular Mechanics Shop Notes for 1919, p. 3271. Unknown: cutter and bolt sizes. Picture: the book's photo and drawing.
Hagati
Unknown

Amabwiriza

1

Make the moving knife

Take a 14 in flat file. Grind one side smooth and sharpen part of the tip and one edge. Heat it cherry red and punch the bolt hole.

Ibikoresho by'iyi ntambwe:

Ikariso ry'IcyumaIkariso ry'Icyuma1 14 in flat file

Ibikoresho bikenewe:

Imashini ihyeza yo ku mezaImashini ihyeza yo ku meza
Iziko ryo GucuraIziko ryo Gucura
Igikoresho cyo GufataIgikoresho cyo Gufata
Igitobora gishyushyeIgitobora gishyushye
InyundoInyundo
2

Forge the fixed cutter

Forge the fixed cutter from part of an old plowshare or other suitable scrap steel, bent as in the drawing so it can be screwed to the bench, with a hole for the pivot bolt.

Ibikoresho by'iyi ntambwe:

Inkoni y'icyuma cya karubone (0.6 % C)Inkoni y'icyuma cya karubone (0.6 % C)1 scrap steel

Ibikoresho bikenewe:

Iziko ryo GucuraIziko ryo Gucura
Igikoresho cyo GufataIgikoresho cyo Gufata
InyundoInyundo
Igitobora gishyushyeIgitobora gishyushye
3

Assemble on the bench

Screw the fixed cutter to the bench and bolt the file knife to it. Use a locknut on the bolt, or rivet the end over.

Ibikoresho by'iyi ntambwe:

Bulo ifite umutwe w'impande esheshatu - urwego 8.8Bulo ifite umutwe w'impande esheshatu - urwego 8.81 igice
Umupira w'Impande EsheshatuUmupira w'Impande Esheshatu2 nut and locknut
Imisumari y'ibitiImisumari y'ibiti1 igice

Ibikoresho bikenewe:

Isupana ihindurwaIsupana ihindurwa
Agafuni k'urwasaya rugororotseAgafuni k'urwasaya rugororotse

Ibikoresho

5

Ibikoresho bikenewe

7

Iki gishushanyo gikora

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