Where to get bearings?

Croatan_Kid

Croatan_Kid

How's your hammer hangin'?
Joined
Nov 4, 2007
Location
New Bern
I need two 6208LLUC4 bearings. Does anybody know of a good place to find them? I did some quick Googling, but it's tough finding them for a decent price and fairly quickly.

They're for a project to rebuild a truck part. I can replace the whole assembly for 160 bucks. I'll probably replace it for now and rebuild the stock one to keep as a spare.

Thought some of you guys might know some places to look that I don't. Nerds :D
 
You really don't need the C4 clearance for that application. Just get a standard 6208LL from a local bearing shop.
 
jeepinmatt said:
You really don't need the C4 clearance for that application. Just get a standard 6208LL from a local bearing shop.
Click to expand...

I wouldn't think so either, but that's what came out of it and it lasted over 300k miles. I figured I'd put the same thing back in it.

It's the fan hub on my Duramax, btw. Looks like they remove the inside seals on each bearing and pump a little extra in the cavity between them too. Normally, I'd just replace it and be done, but it sorta looks like a fun little project to tinker with.
 
Croatan_Kid said:
I wouldn't think so either, but that's what came out of it and it lasted over 300k miles. I figured I'd put the same thing back in it.

It's the fan hub on my Duramax, btw. Looks like they remove the inside seals on each bearing and pump a little extra in the cavity between them too. Normally, I'd just replace it and be done, but it sorta looks like a fun little project to tinker with.
Click to expand...
Related/unrelated. When I put new spindles in my mower deck I pulled the top and bottom bearings And pulled the seals that faced each other (inside the spindle housing) and that way when you pump grease into the housing it actually gets into the bearings. They have lasted a long time now whereas other mowers I have had it seemed like almost an annual maintenance / replacement item.
 
Croatan_Kid said:
@jeepinmatt

Think this will work?

Click to expand...
I certainly wouldn't cheap out on it and get an off-brand bearing, and a lower class on top of that. You'd be better off getting a standard NTN in my opinion (which are like $13 and probably in stock near you). Other option would be a name brand C3. Here's the NTN for under $30 with 3 day shipping (to me, not sure about you) from multiple sources: 6208lluc3 | eBay
 
skyhighZJ said:
Related/unrelated. When I put new spindles in my mower deck I pulled the top and bottom bearings And pulled the seals that faced each other (inside the spindle housing) and that way when you pump grease into the housing it actually gets into the bearings. They have lasted a long time now whereas other mowers I have had it seemed like almost an annual maintenance / replacement item.
Click to expand...

My dad was REALLY bad about washer the mower deck with the water hose. He had to put deck bearings in every year. Brilliant, right?
 
jeepinmatt said:
I certainly wouldn't cheap out on it and get an off-brand bearing, and a lower class on top of that. You'd be better off getting a standard NTN in my opinion (which are like $13 and probably in stock near you). Other option would be a name brand C3. Here's the NTN for under $30 with 3 day shipping (to me, not sure about you) from multiple sources: 6208lluc3 | eBay
Click to expand...

I'm thinking the reason for C4 clearance is for heat. Not only the operating heat, but also the heat being blown across it. That's just a guess. I don't see why a C3 wouldn't work though.

Basically now I'm doing a lot of reading and part number and spec searching. Different seal types, operating temperature ranges, and clearances. I'm certainly learning some things.

Now I'm looking at 6208 RS bearings. They're rubber sealed on one side. Sorta seeing what's available vs price and stuff like that. I do it a lot with truck parts. Fishing, as I refer to it.

You guys have been most helpful!
 
Nowhere specified exactly how much, but said C4 is greater than C3 clearance.

Just found the NTNs for 25 bucks a piece. Ordered two :D

Edit...I did find this:

The following is a list of bearing clearance values and what they mean:

  • C0 – Referred to as “standard clearance”. Normally, there are no markings on a bearing with a C0 clearance value.
  • C2 – Refers to a “less than standard clearance”. Bearings with this type of clearance are uncommon and have very limited uses.
  • C3 – Refers to a “greater than standard clearance”. This is the most common type of bearing, and is the correct choice for the majority of applications.
  • C4 – Refers to “greater than C3 clearance”. Not as common as C3, but often specified in small engine crankshaft bearings.

The same site also gave this little tidbit.

The radial play for a given bore size is not an exact value, but a range. For example, a 6205 C3 bearing (25mm bore) has a radial play value that falls between .0006” and .0010”. The same bearing in a C4 clearance has a clearance range of .0011” to .0015”. In a properly assembled bearing, the clearance will generally fall in the middle of the tolerance range.
 
Had to keep digging... a 6208 C4 has a radial clearance of .030 to .051". Seems like a lot, but that's just from the ball to the inner radius of the bearing race. I don't suppose that necessarily means it has slack in it. I realize I'm kinda nerding out on this 🤷‍♂️
 
Croatan_Kid said:
Nowhere specified exactly how much, but said C4 is greater than C3 clearance.

Just found the NTNs for 25 bucks a piece. Ordered two :D

Edit...I did find this:

The following is a list of bearing clearance values and what they mean:

  • C0 – Referred to as “standard clearance”. Normally, there are no markings on a bearing with a C0 clearance value.
  • C2 – Refers to a “less than standard clearance”. Bearings with this type of clearance are uncommon and have very limited uses.
  • C3 – Refers to a “greater than standard clearance”. This is the most common type of bearing, and is the correct choice for the majority of applications.
  • C4 – Refers to “greater than C3 clearance”. Not as common as C3, but often specified in small engine crankshaft bearings.

The same site also gave this little tidbit.

The radial play for a given bore size is not an exact value, but a range. For example, a 6205 C3 bearing (25mm bore) has a radial play value that falls between .0006” and .0010”. The same bearing in a C4 clearance has a clearance range of .0011” to .0015”. In a properly assembled bearing, the clearance will generally fall in the middle of the tolerance range.
Click to expand...
I had clearance and tolerance classes mixed up in my head. Deleted my previous post so as not to cause future confusion. Sounds like you're on the right track, but you're definitely putting way too much thought into this :D
 
I had to do some reading because I was thinking along the same lines you were.

Threads piss me off like that sometimes. We have a crap load of J threads on aircraft stuff. You know how many taps we have for those? That's right...none. Makes life fun :rolleyes: Then you get in to different clearances and classes...it's toooo much sometimes.

But hey, you know what they call engineers with common sense, right?
 
Croatan_Kid said:
I had to do some reading because I was thinking along the same lines you were.

Threads piss me off like that sometimes. We have a crap load of J threads on aircraft stuff. You know how many taps we have for those? That's right...none. Makes life fun :rolleyes: Then you get in to different clearances and classes...it's toooo much sometimes.

But hey, you know what they call engineers with common sense, right?
Click to expand...
Actors?
 
Back
Top