Axial loads
2010-01-14 22:27:41.359619+01 by
Dan Lyke
3 comments
I recently bought a shload of 608ZZ bearings for a project that's gotten postponed because I now have the milling machine. One of the projects Charlene and I have been talking about is a lift for a piece at the head of the bed that'd serve as a retractable bookshelf/whatnot. Today, VXB.com sent me a "get a free set of digital calipers with an order of $20 or more, so I went and browsed through their thrust bearings and decided that a set of $8 calipers wasn't worth speindg $30 on those bearings pre-emptively, but it did get me searching around, and apparently my Google-fu is lacking.
Anyone got an idea on how I'd figure a reasonable working axial load for a 608ZZ bearing?
[ related topics:
Fabrication Furniture
]
comments in ascending chronological order (reverse):
#Comment Re: made: 2010-01-14 23:17:15.114552+01 by:
meuon
Buy one. Progressively load it until it binds.. and more until it breaks.
the spec says 'deep groove' but it's a shallow small high speed bearing, it's not made for high loads.
Nancy would love it if I finished making the headboard for our bed.. we'll have to compare notes. I was looking at using a modified 19" rack slide...
#Comment Re: made: 2010-01-14 23:44:05.704174+01 by:
Dan Lyke
I've got a hundred of the puppies, I guess it's just to get some 5/16" threaded rod and build a stand.
I was thinking of implementing the lift with 4 threaded rods driven with a cogged belt or a chain (bike or motorcycle), probably using a drill for the motor (cheap, relatively high torque, with speed control and reverse built in). But by the time I get there I'll probably just spring for the thirty bucks for some good thrust bearings.
#Comment Re: made: 2010-01-15 14:20:31.444178+01 by:
meuon
What!?! no pneumatic air-rams with a biofeedback controlled oscillation mode?
Worth knowing: At the industrial hardware nuts and bolts places, you can by threaded rod in various grades besides the floppy coat hanger grade steel the common hardware store carry.
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