Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
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.
Hagati
Unknown
Amabwiriza
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.
Ibikoresho bikenewe:
Mikorometero2
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.
Ibikoresho by'iyi ntambwe:
Inkoni y'icyuma cya karubone (0.6 % C)10 ten spannersIbikoresho bikenewe:
Iziko ryo Gucura
Inyundo y'imashini
Ingoyi3
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.
Ibikoresho bikenewe:
Imashini ibaza icyuma
Ikariso ry'IcyumaMikorometero
Itanura ryo gutunganya hakoreshejwe ubushyuhe
Indobo yo gukonjeshaIbikoresho
1- 10 ten spannersUmwanya
Ibikoresho bikenewe
8- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
CC0 Umurenge rusange
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