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Overunity Machines Forum



STEORN DEMO LIVE & STREAM in Dublin, December 15th, 10 AM

Started by PaulLowrance, December 04, 2009, 09:13:07 AM

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ATT

#905
December 31, 2009, 10:15:48 PM
Quote from: PaulLowrance on December 31, 2009, 07:25:36 PM
Another question. My ball bearing ID is 0.125" diameter, but if I place a rod that's 0.125" it's a sloppy fit.

You can't always trust the consistency or the tolerance a particular manufacturer allows, you really have to try it out to actually 'know' what you're dealing with on a supplier by supplier basis.

You might want to 'mic' (mike) the bearings and the rods for O.D. but I think you have to go with a caliper to read I.D., if possible.

If you do this kind of thing a lot, you can get a set of 'reference' rods that will let you obtain I.D. measurements directly (kind of like 'feeler' gauges, but round). A 'library' of pin gauges will run you around 800-1500 bucks.

A cheap way out for these is to use the shank-end of numbered drill bits, 'mike' them first to actually know what your measuring.

Here's some hole-gauges for accurate I.D. measurements:
http://www.starrett.com/download/315_p365_368.pdf

Prices - about 120 bucks covers you for 1/8" to 1/2":
http://www.msdiscount.com/columnar.aspx?cat_id=1502&session_id=228617892&category_site=STARTOOL

Get a good  micrometer (Starrett is what I use), just buy it once.

Tony

Jimboot

#906
December 31, 2009, 10:27:38 PM
Complete noob here that has been following the Steorn saga from day1. Very excited about the replications & variation. I'm winding my 6th toroid now. Man that is time consuming but the prize seems worth it. Thanks to all. I too am in Australia so I have been to the local Jaycar to get the same components as Ossie. Hard to bloody keep up with him tho! Every time I come to the forum he's made 2 doz improvements! I have a rig of a notebook hard drive with 2 neos atm. I tried JLN switch circuit but couldn't get it working. So now I'm on to Ossie's luvyawork guys! HNY!

Jimboot

#907
December 31, 2009, 10:45:23 PM
Is there an easier way to wind toroids other than this?
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