So i looked up a specific bearing that is common for many of our machines when you get down to the basic part number....in this case 6203.
So this site is recommended all over the web on woodworking searches and it looks like they have a significant variety and this is just the issue that i have come across before.
Take a look at this search
Hope it comes out way i saw it. Anyway all i did was type in 6203 in the search box and got this 2 page list of options.
Looking at the variations in price one can go from $2.37 all the way in steps thru to $371.77 dont forget the .77
Now i know the basics like the dimensions matching and sealed versus unsealed and different types of seals but let be real at the hobby end of the scale how do you choose
Can anyone offer some insight (obviously the sizes have to match what you after) i read up on a couple of bearing manufacturers sites in the FAQ but they only seem to confuse one even more especially when you get into clearance specs like the C3 versus others and the terms like fit versus clearance.
I can see in some applications for our machines where we would be long gone before the bearing wore out if we purchased specs of no applicability just to be on the safe side.
If i recall correctly this is the same bearing that was on my Delta band saw and i can tell you that was supposed to be "American made" ( yeah right American assembled) with a 5 year warranty being the "X" rated machines and yet with relatively very little use i found that the bearings were shot and upon changing them i could not believe the difference in the noise never any other gain.
I am contemplating changing the bearing on my Busy Bee lathe spindle for similar reasons but at the moment its better the devil i know than what i don't.
In most of our cases these bearings are being placed under overhang weight type loads even if they have a dual bearing configuration on the shaft/arbor. This would add to run out in any rotating shaft being used for turning a cutting tool.
BTW i did find it very easy to change the bearings on my band saw and the installed ones were not even properly sealed from Romania go figure.