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Old 11-11-2017, 02:33 PM
zogthegreat zogthegreat is offline
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Default Advice need on axle bearings

Hi everyone!

I'm an experienced electric scooter modder who has decided to start his first big boy project.

I picked up a mini chopper frame for $40.00 recently.

I stripped it down and found that the rear flange bearings are bad, (one is seized and the other one spins rough). I found replacement bearings at Tractor Supply, but I was wondering if some of the "name brand" bearings that I've seen on go kart part suppliers web sites are better or are they more or less the same?

Thanks!

zog
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Old 11-11-2017, 03:05 PM
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Get bearings at NAPA in the red and blue box that have a German name eh...
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Old 11-11-2017, 03:39 PM
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I just checked napaonline.com. They have tapered bearings with 1" ID, but no flange bearings. This is what I have, maybe I'm calling it the wrong thing:

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Old 11-11-2017, 03:42 PM
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If you have cast flange pillows with grease zerks, make sure you get bearings that have the outer race ported for grease so you can actually use the zerks. This will prolong bearing life. These bearings will frequently be "shielded" bearings, with a suffix of 2Z. This allows grease to be purged through without damaging a seal.

Stamped flangettes should use pre-lubricated sealed bearings, and will typically have a suffix of 2rs, indicating full contact rubber seals on both sides.

---------- Post added at 04:42 PM ---------- Previous post was at 04:40 PM ----------

Just saw the pic of your bearing.

Those appear to be shielded bearings designed to be run in a cast flange with a grease zerk. That's what that groove around the outer race is for. It allows the grease to find its way to the hole regardless of how the bearing is oriented in relation to the zerk. Running this type of bearing in a flangette does not allow it to be greased, and the shielded sides of the bearing will allow the existing grease to escape when it warms up and will also allow water and dirt intrusion over time. Routine greasing is required to maintain these bearings.

You should find pre-lubricated sealed bearings instead, or switch to greaseable flanges.
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Old 11-11-2017, 04:47 PM
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Quote:
Originally Posted by anickode View Post
Stamped flangettes should use pre-lubricated sealed bearings, and will typically have a suffix of 2rs, indicating full contact rubber seals on both sides.

You should find pre-lubricated sealed bearings instead, or switch to greaseable flanges.
Do you have a link, perchance? I've been googling, but I'm only finding the ones with the grove.

Or is there a better option for me? I don't mind modifying my frame to fit a different type of bearing, (I'm converting the rear end of my project to a swing arm).
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Old 11-11-2017, 05:20 PM
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You will probably have better luck looking it up by the bearing number, which will be a 205-16

Sa205-16 will use eccentric locking collars (my personal preference)
Sb205-16 will use set screws

There are sealed, shielded, greasable and non-greasable versions available

Btw, flanged bearings are different. These are self-aligning bearings (the spherical outer race is what allows that). When you buy the bearing it will just be the bearing part, and the flange will be purchased separately.
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Old 11-11-2017, 05:32 PM
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I usually take my broken bearings into NAPA and they'll find them even if they don't have. Canadian Napa...
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Old 11-11-2017, 05:33 PM
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Thanks! I think that I will go with the SB205's. I don't have a lot of room between the frame and the tire.

Would you recommended sticking with a 2 hole flange is is there a better choice? I'm totally new to this type of build, so I'm still on my "learning curve"!
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Old 11-11-2017, 05:47 PM
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Quote:
Originally Posted by zogthegreat View Post
Thanks! I think that I will go with the SB205's. I don't have a lot of room between the frame and the tire.

Would you recommended sticking with a 2 hole flange is is there a better choice? I'm totally new to this type of build, so I'm still on my "learning curve"!
I personally like the 3-hole flangettes, but that's just my preference for new builds. No point drilling more holes in your frame, since you're set up for 2 holers.

As far as your original question regarding brand, no there isn't much difference, unless you're buying Timkens or something like that. Pretty much anything you buy will have come from one of a handful of Chinese factories, regardless of brand.

Fyi- "flanges" are typically a one piece cast unit, usually iron, but they can be aluminum, steel, stainless, etc.

"Flangettes" are the stamped steel ones that you sandwich the bearing between a pair of them. This is typically what you'll find on go karts.
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Old 11-11-2017, 08:58 PM
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LOL, I just started pricing some replacement flangettes. $10.00 each? OUCH! I guess that resolves the question of 2 or 3 or 4 holes! Since mine are in good shape, I'll clean them up and paint them.

Thanks to everyone for the help!

zog
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Old 11-11-2017, 09:41 PM
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Ha. I replace the 8 bearing on one of my Dingos. Was just over $100.
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Old 11-11-2017, 09:47 PM
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Quote:
Originally Posted by zogthegreat View Post
LOL, I just started pricing some replacement flangettes. $10.00 each? OUCH! I guess that resolves the question of 2 or 3 or 4 holes! Since mine are in good shape, I'll clean them up and paint them.

Thanks to everyone for the help!

zog
They're like 2 bucks a pair at gopowersports. You'll need two pairs.
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Old 11-11-2017, 10:10 PM
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Quote:
Originally Posted by Whitetrashrocker View Post
Ha. I replace the 8 bearing on one of my Dingos. Was just over $100.
I just took a look at your dingo project and it occurred to me that everyone tells how much they paid for the initial frame, but never mentions the total cost of the project!

I certainly DON'T want my girlfriend finding out how much my hobby cost!

---------- Post added at 11:10 PM ---------- Previous post was at 10:58 PM ----------

Quote:
Originally Posted by anickode View Post
They're like 2 bucks a pair at gopowersports. You'll need two pairs.
http://www.gopowersports.com/2-hole-...gs-set-of-two/
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Old 11-11-2017, 10:14 PM
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I've got about 400 in each kart.
And lots of labor!
I ride break repeat.
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Old 11-13-2017, 12:18 PM
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In all honesty if you are riding alot... and dont cover the bike up after using(Ie just leve it out in the elements) then ya get greasable bearings with housings.... otherwise just stick to the flangetts as theyll be more than enough for a good amount of time... I had to replace a set of those and bearings, cause I left it out in the elements.... after that I got a tarp... no problems now....

On my big bike, I have 5 pillowblocks..... a bearing change will run about $100, maybe a bit less if I twist out the bearings of the housings and reuse them......
Also, pretty much a complete disassembly of the bike aswell.....
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