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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.
Katamtaman
Unknown
Mga Tagubilin
1
1
Make the moving knife
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.
Mga materyales para sa hakbang na ito:
Kikil na Pang-metal1 14 in flat fileMga kailangang kasangkapan:
Gilingang pang-mesa
Pandayan
Sipit
Mainit na pambutas
Martilyo2
2
Forge the fixed cutter
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.
Mga materyales para sa hakbang na ito:
Barang carbon steel (0.6 % C)1 scrap steelMga kailangang kasangkapan:
PandayanSipitMartilyoMainit na pambutas3
3
Assemble on the bench
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.
Mga materyales para sa hakbang na ito:
Turnilyong anim-anggulo - uri 8.81 piraso
Tuerkang Heksagonal2 nut and locknut
Mga turnilyong pangkahoy1 pirasoMga kailangang kasangkapan:
Llaveng ingles
Distornilyador na patagMga Materyales
5- 1 14 in flat filePlaceholder
- 1 scrap steelPlaceholder
- Placeholder
- 2 nut and locknutPlaceholder
- 1 pirasoPlaceholder
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