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Spanner Set: Open-End Wrenches for 1/4 to 1 Inch Bolts (Machinery's Handbook, 1924)
A set of open-end spanners made to the standard dimensions in Machinery's Handbook. The jaw opening fits the nut of each bolt size, and head width, head thickness and length grow with it, so each spanner is strong enough for its own nut.
Variable: the bolt size. The table gives each spanner's dimensions from 1/4 in up to 3 1/2 in bolts; this set covers 1/4 to 1 in.
Source: Machinery's Handbook (1924), p. 848, Dimensions of Wrenches. Unknown: the steel and its hardening. Picture: the Handbook's page.
Katamtaman
Unknown
Mga Tagubilin
1
1
Pick the sizes
Pick the sizes
For each bolt size, the Handbook gives jaw opening A, head width B, head thickness H and overall length L, in inches. 1/4 in bolt: 1/2, 1, 1/4, 5 1/2. 5/16: 19/32, 1 3/16, 5/16, 6. 3/8: 11/16, 1 3/8, 3/8, 7. 7/16: 25/32, 1 9/16, 7/16, 8. 1/2: 7/8, 1 3/4, 1/2, 9. 9/16: 31/32, 1 15/16, 9/16, 10. 5/8: 1 1/16, 2 1/8, 5/8, 11. 3/4: 1 1/4, 2 1/2, 11/16, 12 1/2. 7/8: 1 7/16, 2 15/16, 3/4, 14 1/2. 1 in: 1 5/8, 3 5/16, 7/8, 16 1/2. The neck and handle sizes are in the same table. Ours: a set of these ten.
Mga kailangang kasangkapan:
Mikrometro2
2
Forge the blanks
Forge the blanks
Forge each spanner from bar: a round head as wide as B and as thick as H, a neck, and a handle to make the overall length L. Ours: carbon steel bar forged under a power hammer. Not given: the steel, the forging method.
Mga materyales para sa hakbang na ito:
Barang carbon steel (0.6 % C)10 ten spannersMga kailangang kasangkapan:
Pandayan
Power hammer
Palihan3
3
Cut the jaws and harden
Cut the jaws and harden
Cut the open jaw in each head to the opening A, so it fits across the flats of that bolt's nut, and finish the faces parallel. Check each opening. Harden and temper the spanners. Not given: the hardening.
Mga kailangang kasangkapan:
Makinang panggiling ng metal
Kikil na Pang-metalMikrometro
Hurno para sa heat treatment
Timbang pampatigasMga Materyales
1- 10 ten spannersPlaceholder
Mga Kinakailangang Kasangkapan
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