Fieldlines.com || Make your electricity from scratch!

Front Page - [Homebrewed Electricity-- (wind) (solar) (hydro) (steam) (controls) (storage) (mechanical)] - Classifieds - Site News
Everything - Newbies - [Remote Living-- (housing) (heat) (light) (water)] - Reviews - Diaries - Our Products

Stainless steel band
By martin1, Section Newbies Posted on Mon Feb 09, 2009 at 08:23:05 AM MST
wich goes around the magnet disc

Does anybody know how thick it should be and also, how much shorter than the circumference of the magnet disc, should it be? I've tried to google search the board but I cannot find the answer.

Stainless steel band | 12 comments (12 topical)

Re: Stainless steel band (3.00 / 0) (#1)
by DanB on Mon Feb 09, 2009 at 10:17:25 AM MST

for 12 inch diameter rotors I cut the band about 3/32 inch shorter than the circumferance.

Re: Stainless steel band (3.00 / 0) (#2)
by DanB on Mon Feb 09, 2009 at 10:18:39 AM MST

The stuff I use comes from Uline (they're a shipping supply place), its .030" thick and 3/4" wide. It's fairly expensive by the roll - I'm not sure where you'd get just a little bit - enough for one machine.

Re: Stainless steel band (3.00 / 0) (#6)
by oztules on Mon Feb 09, 2009 at 03:09:19 PM MST

" I'm not sure where you'd get just a little bit - enough for one machine. "

......... possibly from otherpower... somewhere in a remote part of the Northern Colorado mountains, 12 miles past the nearest power pole or phone line..... perchance??

..............oztules

[ Parent ]

Re: Stainless steel band (3.00 / 0) (#3)
by martin1 on Mon Feb 09, 2009 at 12:33:21 PM MST

Thanks DanB that's all the numbers I need. I was thinking of asking a metal shop to cut bands from stainless sheet metal.

Re: Stainless steel band (3.00 / 0) (#4)
by DanB on Mon Feb 09, 2009 at 02:10:35 PM MST

yes, its probably cheaper if you can just get them to shear off a bit from a sheet. I did a few machines that way, it worked out fine.

[ Parent ]

Re: Stainless steel band (3.00 / 0) (#5)
by windspeed on Mon Feb 09, 2009 at 03:02:55 PM MST

Do you butt the ends for welding
Windspeed

[ Parent ]

Re: Stainless steel band (3.00 / 0) (#7)
by vawtman on Mon Feb 09, 2009 at 05:23:55 PM MST

Do you really need the banding for these things?Seems it would be better to mount the mags better.

Just me though.

[ Parent ]

Re: Stainless steel band (3.00 / 0) (#12)
by Dave B on Sat Feb 14, 2009 at 03:41:23 PM MST

No, the banding is not needed, it's a security blanket for improperly secured magnets. The banding was created when early attempts were made to secure the magnets with cheap "Bondo" fiberglass casting. It cracked, broke apart allowed water to seep under the magnets with rust and basically created a mess and there were lost magnets at times too. Bondo is not a proper adhesive to secure magnets.

Casting the magnets fully like is done is not necessary either if properly "glued" with an adhesive. Casting the rotors looks nice as does the band but this is just not giving up the look of the old necessary ways of doing things before the proper epoxies (like now) that are being used. Dave B.

[ Parent ]

Re: Stainless steel band (3.00 / 0) (#8)
by Sly on Mon Feb 09, 2009 at 05:41:39 PM MST

Hi,

What I did for mine was cut a strip off of a SS sheet 1/2" wide and ran it through a body shop roller, it is amazing how quickly it curls up! 1/2" wide based on Dan's recommendations (10' Otherpower) i.e. a 1/4" for the magnet rotor thickness + another 1/4" to go half way up the magnets. This leaves the magnet stick out by a 1/4" to maybe help with cooling.

I am not the best SS welder in town....so after a few attempts at butt welding I decided to overlap the SS band by 3/8" making the welding much easier. I positioned it exactly 180deg apart on the magnet rotors to balance thing out.

I would not be overly concerned by the thickness. Mine has been working without a problem now since November 1st. Oh by the way thanks to the Dans, their new book is great!!

Hope it helps.

sly

Re: Stainless steel band (3.00 / 0) (#9)
by ibeweagle on Mon Feb 09, 2009 at 06:43:09 PM MST

might want to look at newrotor design when it gets posted cheers ibeweagle

Re: Stainless steel band (3.00 / 0) (#10)
by Bigwheel on Thu Feb 12, 2009 at 07:04:38 AM MST

Hi, I don't know what you have in your area, possibly check out a metal stamping company. We've got coils of the stuff and got mine from the scrap bin. I didn't butt weld the pieces together. I did an overlap weld. I bent one side up about material thickness and back down again to make a .030 step. Cut the circumfance down the 3/32 and layed it over. Clamped it down and tig welded the one side. I did it this way to keep from blowing thru when laying the bead. I wish I had a picture I could show ya. Another way I thought of doing it was to drill/punch a hole thru one side and lay it over and fill it back in with weld simiular to a spot weld. Hope this helps you out.

Re: Stainless steel band (3.00 / 0) (#11)
by jlt on Sat Feb 14, 2009 at 08:16:19 AM MST

I use regular sheet metal for mine.1/2 wide for a 3/8 rotor.1/8 inch will not short out your mags. but gives plenty of shoulder to hold mags.also i use automotive windshield urethane around the mags to hold them in place.they never come loose. but they can be cut back out with a stainless knife.

Stainless steel band | 12 comments (12 topical)

Menu

� create account
� How to use the board
� FAQs
� search the board
� Google search the board

Login

Make a new account

Username:

Password:

Total Views

��141 Scoop users have viewed this posting.

Related Links

� magnet
� Also by martin1

You must be a registered user to post here. It's easy and free, and the link is on the upper right side of your page.
All trademarks and copyrights on this page are owned by their respective companies. Postings are owned by the poster, but may be deleted or moved at the ADMIN's sole discretion. The Rest � 2009 Forcefield.
You can Email the board ADMIN here. PLEASE include the username you signed up with!