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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.
Abantado
Works process
Mga Tagubilin
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.
Mga materyales para sa hakbang na ito:
Kawad na asero para sa resorte1 as requiredMga kailangang kasangkapan:
Plais na pamutol ng kawad na pahilis
Makinang cold heading3
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.
Mga kailangang kasangkapan:
Panggiling ng bola na may ukang plato
Langis sa paggupit4
4
Harden and descale
Harden and descale
Heat-treat the steel balls (harden and quench), then tumble off the scale.
Mga kailangang kasangkapan:
Hurno para sa heat treatment
Timbang pampatigas
Deflashing tumbler5
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.
Mga kailangang kasangkapan:
Gulong na panggilingPanggiling ng bola na may ukang plato
Makinang pang-lapping ng bola
Pampakinis na lapping compound
Mikrometro6
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.
Mga Materyales
1- 1 as requiredPlaceholder
Mga Kinakailangang Kasangkapan
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