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UBUHANZI
UBWIZA N'UBUZIMA
UBUKORIKORI
UMUCO N'AMATEKA
IMYIDAGADURO
IBIDUKIKIJE
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Steel Balls for Ball Bearings: Headed, Ground and Lapped
Bearing balls start as steel wire: cut into short pellets, pressed into rough spheres, rolled round between grooved plates, hardened, then ground and lapped until they are almost perfectly round and smooth.
Hejuru
Works process
Amabwiriza
1
1
Watch: how ball bearings are made
Watch: how ball bearings are made
How It's Made: ball bearings, from steel to finished balls and rings.
2
2
Shear and head
Shear and head
Shear the wire into pellets of about the ball's volume. Head each pellet into a rough sphere.
Ibikoresho by'iyi ntambwe:
Insinga y'icyuma cya kamani1 as requiredIbikoresho bikenewe:
Koleyo yo guca insinga y'ukwerekeza
Imashini ikora imitwe idashyushye3
3
Roll off the flash
Roll off the flash
Run the balls between rill plates, one fixed and one turning, with coolant pumped between them. This takes off the flash and rounds them; the pressure also hardens the surface a little.
Ibikoresho bikenewe:
Imashini isena imipira ifite amasahani y'imiyoboro
Amavuta yo gukata4
4
Harden and descale
Harden and descale
Heat-treat the steel balls (harden and quench), then tumble off the scale.
Ibikoresho bikenewe:
Itanura ryo gutunganya hakoreshejwe ubushyuhe
Indobo yo gukonjesha
Ipipa ryo gukuraho amasonga5
5
Grind and lap
Grind and lap
Hard-grind them in the same kind of machine with a fine grinding wheel or abrasive in the coolant, to within about a ten-thousandth of an inch. Lap them for more precision. Check sizes with a micrometer.
Ibikoresho bikenewe:
Uruziga rwo gusyaImashini isena imipira ifite amasahani y'imiyoboro
Imashini inoza imipira
Ifu inoza
Mikorometero6
6
Limits
Limits
Process from Wikipedia's Bearing ball article. Wikipedia lists chrome steel among bearing-ball steels; high-carbon spring-steel wire is our choice here.
Ibikoresho
1- 1 as requiredUmwanya
Ibikoresho bikenewe
11- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
- Umwanya
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