Bearing buddy O-rings - is there a size chart anywhere?

[Homerr]

Mine aren't necessarily 'bad', but the trailer has been sitting so I'd like to toss in new O-rings on my bearing buddies while I have the hubs apart. Anyone know if there's a size chart for the Bearing Buddy O-rings?

Mine appear to be measuring 59.5mm - 60mm OD x 54.5 - 55mm ID with a cross section of 2.5mm. It's always tough to measure used O-rings accurately - especially these thin ones.

McMaaster's web site shows a standard O-ring of 60 x 55 x 2.5, so I'm going to assume that's the size I need, but an official size chart would be extremely helpful!
With any luck my local hardware store has them.

 

[dingbat]

McMaaster's web site shows a standard O-ring of 60 x 55 x 2.5, so I'm going to assume that's the size I need, but an official size chart would be extremely helpful!

https://www.applerubber.com/src/pdf/as568-standard-size-o-rings.pdf

 

[bruceb58]

Why not call the company and ask them what the sizes are?

 

[JimS123]

Whats you taking bout Willis?

I have used BBs for many years and none of them had O-rings"

 

[dingbat]

I have used BBs for many years and none of them had O-rings"

 

[JimS123]

OK, my bad. But that's an internal part. These things are so cheap, why would you want to rebuild one?

 

[dingbat]

These things are so cheap, why would you want to rebuild one?

It’s been a while, but the last time I checked SS BBs where $85 a pair and I need 2 pairs.

If I can fix all them for $2.00 in o-rings and an hour of my time, I making $169 a hour to work on my own stuff…lol

 

[Homerr]

I don't have to rebuild mine per-sey, - my boat has been sitting for several years and I wanted to put in fresh O-rings while I was doing my bearings. Not to mention my Bearing Buddies are over 20 years old. I think they deserve a fresh seal! Mine are the 2441ss model.

Good news though.. I contacted Bearing Buddy and asked what size the O-rings were. They didn't answer that question, but instead are sending me new ones free of charge! THAT'S customer service!

I think the rings are 53 or 54mm OD x 2.5mm CS. It's difficult to get an accurate measurement with used O-rings especially with thin ones like these. I wanted to put in some better Viton types. Maybe I can get a more accurate measurment when I get the new ones for future information. I could always take the shotgun approach and buy a couple different sizes. They are less than a $1 each. Pennies for the regular Buna-type..

Thanks for the replies!

 

[dingbat]

I don't have to rebuild mine per-sey, - my boat has been sitting for several years and I wanted to put in fresh O-rings while I was doing my bearings. Not to mention my Bearing Buddies are over 20 years old. I think they deserve a fresh seal! Mine are the 2441ss model.

Good news though.. I contacted Bearing Buddy and asked what size the O-rings were. They didn't answer that question, but instead are sending me new ones free of charge! THAT'S customer service!

I think the rings are 53 or 54mm OD x 2.5mm CS. It's difficult to get an accurate measurement with used O-rings especially with thin ones like these. I wanted to put in some better Viton types. Maybe I can get a more accurate measurment when I get the new ones for future information. I could always take the shotgun approach and buy a couple different sizes. They are less than a $1 each. Pennies for the regular Buna-type..

Thanks for the replies!

Diameters are easy. A calibrated eyeball is close enough to distinguish one size from the other.

The ID are spaced roughly 0.060” intervals in the smaller sizes. Well with the limitations of caliper measurements.

I never rarely measure the o-ring proper. Always the measure the diameter of the groove on a shaft or the bore on a housing.

Wouldn’t waste my time with fluorocarbon (Viton) in this applications. Buna-N will hold up just as well chemically and you don’t have to deal with fluorocarbons nasty habit of taking a compression set.