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UBUKORIKORI
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IBYAMBARWA
Pulley Wheel Set: Ten Grooved Hardwood Pulleys Turned in Graded Sizes
A pulley is a wheel on a shaft with a groove round its rim that keeps the cord or belt in place (Wikipedia, Pulley). This set is ten hardwood pulleys from 30 to 75 mm, each bored for an 8 mm dowel shaft, so any two can be keyed to one shaft for experiments such as the differential pulley. Sizes and method are ours.
The picture: our drawing.
Hagati
1 day
Amabwiriza
1
1
Cut the blanks
Cut the blanks
Cut ten round blanks from 18 mm hardwood with hole saws, from 30 to 75 mm in steps of 5 mm, each a few millimetres oversize.
Ibikoresho by'iyi ntambwe:
Ikibaho cy'Igiti Gikomeye1 igiceIbikoresho bikenewe:
Ibyuma byo gucamo utwenge
Icyuma Cyivumbura Gihagaze
Amadarubindi y'umutekano2
2
Bore the shaft hole
Bore the shaft hole
Bore each centre 8 mm, square to the face, for the dowel shaft.
Ibikoresho bikenewe:
Icyuma Cyivumbura Gihagaze
Ibyuma Byinshi byo Gucukura
Ikigereranyo cya Digitale cy'Amasentimetero 63
3
Turn rim and groove
Turn rim and groove
Mount each blank on the lathe, turn the rim true to its size, and cut a groove round it between two flanges, about as wide as the cord. Measure each finished diameter at the bottom of the groove and write it on the face.
Ibikoresho bikenewe:
Imashini ikerekeza ibiti
Urupapuro rw'itorero
Icyuma cyo kubaza gifite umuferege
Icyuma cyo guca ku ruzigaIkigereranyo cya Digitale cy'Amasentimetero 6Amadarubindi y'umutekano4
4
Key hole and finish
Key hole and finish
Drill a small hole through the hub of each pulley beside the shaft hole for a pin, so two pulleys can be pinned together to turn as one. Sand and oil them.
Ibikoresho by'iyi ntambwe:
Amavuta y'Ubudodo20 mlIbikoresho bikenewe:
Icyuma Cyivumbura GihagazeIbyuma Byinshi byo Gucukura
Ikusanyirizo ry'urupapuro rwo kunoza
Uduce tw'ipambaIbikoresho
2- 1 igiceUmwanya
- 20 mlUmwanya
Ibikoresho bikenewe
11- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
Iki gishushanyo gikora
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