Ball Bearings
Submitted by PerthGlory on Thu, 2011-06-16 17:17
A bloke in the office is after some stainless steel ball bearings for his sons science experiment.
must be about 20c piece size and need 12 off them.
he is making a newtons craddle for those wondering.
if someone can spare 12 of them we are happy to pick them up locally in perth.
Thanks
PG
iana
Posts: 652
Date Joined: 21/09/09
Newton's "Balls"
I think that your friend is after steel balls (arn't we all!). About 30mm in dia, not ball bearing assemblies. Stainless balls would be as rare as hens teeth. Suggest going to a heavey machinery (mining equip) workshop, asking for a large u/s bearing assembly and then getting the outter race cut off, the balls don't have to be stainless.
A typical Newton's cradle consists of a series of identically sized metal balls suspended in a metal frame so that they are just touching each other at rest. Each ball is attached to the frame by two wires of equal length angled away from each other. This restricts the pendulums' movements to the same plane
Ps you are probably looking for a ball bearing assy capable of taking a 200mm shaft, or the bearing being 300mm in dia, a big bearing.
Rig
Posts: 2925
Date Joined: 27/12/06
LOL
Alot of balls and shaft talk there
Lastchance
Posts: 1273
Date Joined: 02/02/09
That is why Physics is
That is why Physics is gay....Balls are touching. No other way around it.
sarcasm0
Posts: 1396
Date Joined: 25/06/09
Mill Balls
Dunno if this might help, Someone working on or supplying a mine might be able to get some Mill Balls from the crusher in the right size?
If you did get stainless how would you attach the wires?
PerthGlory
Posts: 157
Date Joined: 07/03/10
steel balls
thanks guy for all your comments
stainless arent required, steel will be good enough. i am unsure what mill balls are, though if they are round and a uniform size they may work.
i think they' plan to put them in a lathe and drill the smallest hole to put the wire into it.
cheers
PG