Ubufatanye
UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
IBIRIBWA N'IBINYOBWA
UBWUBATSI BUSUBIRA INYUMA
UBUMENYI
SIPORO
IKORANABUHANGA
IBYAMBARWA
Grooved Pulley Cut from Sheet Tin with Alternately Bent Tongues (Boy Mechanic, 1913)
A small round-belt pulley from a disc of tin: slits cut in from the rim to a ring of punch marks, the tongues bent alternately left and right to form a V groove, and a soldered strip across the middle as the hub.
Utangiye
An hour
Amabwiriza
1
1
How many tongues
How many tongues
Gupakira ikaye ya Jupyter…
2
2
Read the Boy Mechanic
Read the Boy Mechanic
"It is remarkable with how slight care a perfectly true wheel may be made in this manner."
3
3
Lay out
Lay out
On tin, draw a circle the size of the groove bottom and a second circle 1/4 in larger in radius around it. Cut out on the large circle.
Ibikoresho by'iyi ntambwe:
Urubaho rw'icyuma gitwikiriye1 igiceIbikoresho bikenewe:
Ikirangamurongo
Ibyuma bikata ibyuma bisanzwe4
4
Dent and slit
Dent and slit
Mark slight dents about 1/4 in apart all round the small circle with a prick punch or nail. Cut in from the edge to each dent, stopping when the shears click into it.
Ibikoresho bikenewe:
Igicukuzi cyo Gushyira Ikimenyetso
InyundoIbyuma bikata ibyuma bisanzwe5
5
Form the groove
Form the groove
Bend the tongues alternately to right and left and shape them carefully into an even running surface for the belt.
Ibikoresho bikenewe:
Ipfundo Rifite Umunwa Uringaniye6
6
Add the hub
Add the hub
Solder or rivet a strip ('handle') across the centre hole and drill through it the same size as the hole. Solder the tongues where needed to stiffen the wheel.
Ibikoresho by'iyi ntambwe:
Urubaho rw'icyuma gitwikiriye1 igice
Guhambira kwa Sn/Pb1 igice
Utuma tw'umuringa1 igiceIbikoresho bikenewe:
Igikoresho cyo gutobora gikoreshwa n'intoki
Icyuma cyo gusudira7
7
Troubleshooting
Troubleshooting
Tin pulley troubleshooting.
Flow
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8
8
History and honest limits
History and honest limits
From **The Boy Mechanic, Book 1** (Popular Mechanics, 1913), p. 412, by C. W. Nieman (checked on the archive.org scan boymechanic0000unse_n5a8). Sizes in the table are our examples.
Ibikoresho
3- Umwanya
- 1 igiceUmwanya
- 1 igiceUmwanya
Ibikoresho bikenewe
7- Umwanya
- Umwanya
- 2 vendors sell this, none ship to you yetUmwanya
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