First turntable, got tractor flywheel. Bearings? - diyAudio
Go Back   Home > Forums > Source & Line > Analogue Source

Analogue Source Turntables, Tonearms, Cartridges, Phono Stages, Tuners, Tape Recorders, etc.

Please consider donating to help us continue to serve you.

Ads on/off / Custom Title / More PMs / More album space / Advanced printing & mass image saving
Reply
 
Thread Tools Search this Thread
Old 17th January 2007, 12:36 AM   #1
diyAudio Member
 
Join Date: Sep 2006
Default First turntable, got tractor flywheel. Bearings?

I am starting my first turntable. I got this perkins flywheel off ebay. It weighs 52lbs, has a 14" diameter, a 30mm shaft hole and is balanced.

Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

In the first picture right around the hole is about 1mm higher than the rest. Is this bad? I may be able to get it milled down as a last resort. I could just modify a mat?


What setup would work best:
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.
Click the image to open in full size.

What about magnets? What kind like ring magnets? I am concerned if they are not centered or there field is not centered it will create a effect similar to spinning a perment magnet motor.
  Reply With Quote
Old 17th January 2007, 03:05 AM   #2
diyAudio Member
 
neutron7's Avatar
 
Join Date: Dec 2003
Location: Toronto Canada
nice find on ebay. i bet the shipping was more than the flywheel itself!
how many teeth in that big gear? it would be cool if it happened to be the right amount for speed indicator

bottom bearing sitting on flats wont it wander around? i dont think it would be so great.

what about use 2 very strong neo magnets instead of the bottom bearings.
  Reply With Quote
Old 17th January 2007, 04:48 AM   #3
diyAudio Member
 
valveitude's Avatar
 
Join Date: Apr 2005
Location: Naches,WA
Quote:
how many teeth in that big gear? it would be cool if it happened to be the right amount for speed indicator
Doesn't matter..set the strobe rate to match the tooth count
__________________
Experience is a wonderful thing. It enables you to recognize a mistake when you make it again.
  Reply With Quote
Old 17th January 2007, 12:19 PM   #4
diyAudio Member
 
Join Date: Aug 2006
Quote:
bottom bearing sitting on flats wont it wander around? i dont think it would be so great.
All of your designs have this problem- there is nothing in any of them to stop the shaft sliping sideways. I would suggest that, if you must use BB races, that you use 2, with the BB as the vertical bearing.

However, a better bearing would be possible using a brass or even PTFE bush around a shaft- it wqould be far quieter, and as long as you have the platter level, it should not have too much side load.

James
  Reply With Quote
Old 18th January 2007, 02:34 AM   #5
YNWOAN is offline YNWOAN  United Kingdom
diyAudio Member
 
YNWOAN's Avatar
 
Join Date: Jan 2007
I strongly recomend that you do not use ball races and, as sugested, you must have a bearing at the bottom of the shaft - if not along the whole shaft with a heavy platter.
  Reply With Quote
Old 18th January 2007, 05:26 AM   #6
diyAudio Member
 
Join Date: Aug 2003
Location: Calgary on the Bow
look for some babbit bushings that you can have precission machined to fit . They will be a lot quiter than bearings and have less play. Nice one lucky you!
__________________
moray james
  Reply With Quote

Reply


Hide this!Advertise here!
Thread Tools Search this Thread
Search this Thread:

Advanced Search

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Similar Threads
Thread Thread Starter Forum Replies Last Post
Polymer bearings as turn table main bearings. binspaul Analogue Source 16 7th October 2009 12:41 AM
MagLev bearings for tonearm? Cornelis Spronk Analogue Source 1 15th December 2008 03:38 PM
Fast tractor - V8 peranders The Lounge 1 15th October 2008 03:47 AM
air bearings kilowattski Analogue Source 3 11th July 2005 08:01 AM
Magnetically suspended flywheel !!! skaloumbakas Analogue Source 36 28th June 2005 05:22 AM


New To Site? Need Help?

All times are GMT. The time now is 12:11 AM.


vBulletin Optimisation provided by vB Optimise (Pro) - vBulletin Mods & Addons Copyright © 2014 DragonByte Technologies Ltd.
Copyright 1999-2014 diyAudio

Content Relevant URLs by vBSEO 3.3.2