On Tue, Nov 24, 2009 at 10:53 AM, white_knight_411 <white_knight_411@...> wrote:
snip
Ball bearings provide lower friction, higher speed(never seen a 10Krpm bushing before,
I've had the opportunity (?!?) to make some rated at 8k rpm. Some items ran for up to 5 years almost constantly at high load at these speeds.
Darald
but I DO have a couple ball bearings of that rating), ad are more readily available in a vast variety of sizes. They have a smaller load capacity when compared to bushings or needle bearings. What they Gain for this though, is the ability to better handle minor misalignment. A 2degree misalignment in a bushing is disastrous, yet most ball bearings will handle that much without batting an eyelash.
--- In multimachine@yahoogroups.com, "zaphod" <jprimex@...> wrote:
>
> What are the advantages of roller bearings over bronze bushings or babbitt?
>
Bushings(bronze or babbit, one-piece or split) are better suited to lower speeds, and handle lateral loads better, and are more resistant to impact damage. The...
On Tue, Nov 24, 2009 at 10:53 AM, white_knight_411 < ... I've had the opportunity (?!?) to make some rated at 8k rpm. Some items ran for up to 5 years almost...
I think that for most people it would be easiest to churn out a couple dozen bushings once you have either a mill or lathe type machine, that's my plan so far...
Roller bearings have a lower (near zero) stiction ("sticky friction" at zero speed) - not much relevance to metalworking machines Bushings damp vibration...
I need to find a source for some 3" id bearings. I would like roller bearings and but pillow blocks would be ok. I can't really afford more than $20 or so...
Hello Gordon What are you trying to do with the machine? Â The Surplus Center has some 3 inch pillow blocks for $55 each. Â Â Keith Deep Run Portage Back Shop...
If accuracy is important I would find a way to pre-load them. Big SC pillow blocks can be pretty loose without this. Pat ________________________________ From:...
Hello Pat  You are correct about the bearing being loose,a little preload help them a lot.   I tighten the front bearing good,stick a prybar between the...
Your budget appears to be too low for bearings of that size. If you can find used and discarded bearings from heavy equipment and automotive maintenance shops...
... An excellent point. Skate bearings are cheap (608-2RS rubber shielded bearings <http://www.vxb.com/page/bearings/PROD/SB/1ASB> are under a buck each.)...
I could do a steady rest type thing, but I'd rather just have bearings that I know will work and work good. I think I'm going to call my auto parts store and...
... Gordon, After rebuilding a few old cars and trucks and several motorcycles I can tell you that the auto parts house of the past is no where to be found. If...
I need something like this http://www.vxb.com/page/bearings/PROD/Kit9497 I need 2 right away and 4 eventually so I will look on ebay for deals. On Sat, Feb 26,...
Gordon I looked at the bearing link that you posted and the $55 price is a good price for _that_ bearing. That being said I say that the bearing is a C 0 class...
Hi Gordon Here is a link explaining the running clearance designation http://www.ahrinternational.com/bearing_radial_clearance_explained.htm I didn't see the...
Hi   Most well known bearing manufacturers have on line search abilities.I have find it is easier to just enter one dimension ,normally bore size ,to get ...
... How about truck wheel bearings? The 32314 is 70mm(ID)x150mm(OD)x54mm(thick) and is in that price range, I have seen them on eBay for under $10.00, BUT...
Hi Gordon, I noticed you mentioned making bushings from Zamack. I am interested in casting bushings and pulleys with Zamack. Can you tell me where to get it...
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