Could use some help finding a bearing

[rlitman]

I’m rebuilding a Burr King 760 belt grinder (jut got me a nice KBDC VFD and 3HP 3-phase motor for it), and the contact wheel bearing is pretty rough. I’m hoping to replace it, but not pay Burr King prices.

I know enough about bearings to get myself into a little trouble, but I can’t seem to find the one I need. It is a double row (that always makes things tougher), 16mm bore, 30mm OD that is 39mm wide, 2RS. Am I just not going to be able to find this?

 

[LXCam]

That's an odd size for sure. Have you tried SKF site? I tried both McMaster and MSC but no luck.

 

[rlitman]

Yeah, SKF's search is great, but no dice. Most everything I see either bigger balls with a much larger OD, or needle rollers with a smaller OD. I'm considering making a bushing on the lather to work with the needles. In the long run, I think it might hold up better to the abuse than balls.

 

[paulsomlo]

Try Emerson Bearing in Boston - they helped me out before with a bearing that I couldn't find, other than at the OEM, and saved me a small fortune.

Their main # is 800-225-4587, the guy I dealt with is Bob Piracini at 866-995-8764.

 

[MattT]

Are you sure about the dimensions? OD looks greater than length in the picture. And are the measurements caliper or scale?

Also there appears to be writing on the seal in second picture. What does it say?

 

[OccupantRJ]

Search for water pump bearings.

 

[454ragtop]

Might be a 5/8" bore with a 30MM OD? Not uncommon to find bearings sized like this.

 

[LXCam]

Ya know I was just looking at my BK760 and then it hit me. These are made in America to the best of my knowledge. Are you dead certain your metric measurements are correct and this isn't a .625id , 1.125od , 1.500w?

Maybe this link will get you going down the right road.

https://www.nationalprecision.com/b...rframe/dw_double_row_extra_wide/detail/DW4K2/

 

[Wamsutta]

Inside Diameter 17mm
Outside Diameter 30mm
Width 40mm

Is there any chance that those are the actual dimensions?

 

[rlitman]

The water pump bearing was an avenue I pursued a while back that I thought had merit. I found something really close, but too wide.

It could be SAE. I pulled out a micrometer to get a better measurement than my dial caliper. The shaft (at the bearing) comes in at 0.6284”, which could be a press fit for 5/8”, and is actually just under 16mm. The drive end of the shaft is actually turned down to 0.6250” to accept a standard pulley.

So, in inches, the OD is 1.181”, and the width is 1.540” from seal to seal (the rubber sticks out a little).

The seal markings read:
JAPAN == KOYO RSE

 

[Wamsutta]

So I take it the answer is NO ?

 

[rlitman]

So I take it the answer is NO ?

Sorry, no. I only saw your question after I posted my reply with dimensions not that I’m back home to take a closer look.

But the 5/8” ID x 30mm OD is a possibility, if I can find it.

 

[Wamsutta]

I'm looking at some bearing charts. 1.1811 seems to be a common outside diameter in inches. It's looking like your bearings may be SAE.

 

[strength_and_power]

Check Purvis Bearing in Texas. They have had bearings in stock for a 30 year old Swedish made safe that we desperately needed. Should be easy for them.


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[WittHay]

The water pump bearing was an avenue I pursued a while back that I thought had merit. I found something really close, but too wide.

It could be SAE. I pulled out a micrometer to get a better measurement than my dial caliper. The shaft (at the bearing) comes in at 0.6284”, which could be a press fit for 5/8”, and is actually just under 16mm. The drive end of the shaft is actually turned down to 0.6250” to accept a standard pulley.

So, in inches, the OD is 1.181”, and the width is 1.540” from seal to seal (the rubber sticks out a little).

The seal markings read:
JAPAN == KOYO RSE

You beat me to it , I was gong to suggest Koyo, NTN or NSK . Not the most fun thing looking up bearing charts and specifications

 

[rlitman]

I'm looking at some bearing charts. 1.1811 seems to be a common outside diameter in inches. It's looking like your bearings may be SAE.

1.1811” = 29.99994mm. And I saw some water pump bearings that were 5/8 shaft and 30mm OD for under $10 delivered. SOOO close, but not quite:
https://www.amazon.com/dp/B00R1U94R2/?tag=atomicindus08-20

 

[MattT]

After a closer look at the second picture and a little poking around on the web I'm 99% certain in saying it's an integral shaft water pump bearing. It's possible it's a custom one made for Burr King and if it is you're not likely to find a replacement from anywhere else.

Depending on how bad it is injecting fresh grease into it with a hypodermic might smooth it out.

 

[454ragtop]

1.1811” = 29.99994mm. And I saw some water pump bearings that were 5/8 shaft and 30mm OD for under $10 delivered. SOOO close, but not quite:
https://www.amazon.com/dp/B00R1U94R2/?tag=atomicindus08-20

Uhmm, I'm thinking 1.1811 and 30 MM are about the same in the real world. If it were an inch measurement it would likely be closer to 1.1875 = 1-3/16".

 

[OccupantRJ]

Email those pictures and dimensions to Koyo. Also, can several bearings be used in a stack to replace that unit bearing? There are 30 mm O.D. bearings with various inner diameters. One is 5/8” diameter. My Clausing lathe used those in the lead screw gear box. A bit hard to find, so most people use a bushing inside a 17 mm bore.

 

[rlitman]

After a closer look at the second picture and a little poking around on the web I'm 99% certain in saying it's an integral shaft water pump bearing. It's possible it's a custom one made for Burr King and if it is you're not likely to find a replacement from anywhere else.

Depending on how bad it is injecting fresh grease into it with a hypodermic might smooth it out.

I'm pretty sure you're right, but don't count me out yet.

As for fresh grease, I was thinking that, but it feels too notchy to me to be worth saving (yeah, I could perhaps get another year out of it, but I want a long-term fix if I'm putting in the effort of restoring this).

I looked into water pump bearings, and now I understand why the size is weird. I didn't realize that they have an integral shaft, so there is nothing to press off here.

So, I'm considering two options.

1) Buy a new water pump bearing that has 5/8" shafts on both ends, thread one end, mill the other with a flat for the pulley, and press on a collar, or

2) Cut off the bearing on this shaft, build up the shaft around the bearing surfaces with bronze, and turn it down to 17mm. With a 17mm shaft, I can press on the 6903 bearing of my choice.

I'm leaning towards option 2. Partly because I loathe threading on the lathe, and partly because it would let me choose a premium bearing (like a hybrid ceramic).

Anyway, thanks guys. I've got some new direction now.

 

[480volt]

Motion Industries

 

[engineer2]

I have renewed bearings by simply re-lubing them. Pop the seals out, clean the bearing, re-grease, pop the seals back in. It's not a fix, but it buys you some time.

You could also stack up three 30x16x10 bearings, but that's not a common size either.

 

[Wamsutta]

1.1811” = 29.99994mm. And I saw some water pump bearings that were 5/8 shaft and 30mm OD for under $10 delivered. SOOO close, but not quite:
https://www.amazon.com/dp/B00R1U94R2/?tag=atomicindus08-20

The most unusual dimension is the width; or what would be considered the hight if it was sitting on a table. 39mm is a very wide bearing to have with those other two dimensions.

 

[rlitman]

I have renewed bearings by simply re-lubing them. Pop the seals out, clean the bearing, re-grease, pop the seals back in. It's not a fix, but it buys you some time.

You could also stack up three 30x16x10 bearings, but that's not a common size either.

I too have had luck with adding grease in some cases. Particularly when the wear is even and the bearing just feels loose but still pretty smooth. Here, you can feel the balls falling to notches, and it runs very loud.

I'd sooner stack two bearings with a spacer bushing, but yeah, that's a size I can't find. But as I discovered above, because this is a water pump bearing, the shaft is an integral part to the inner race, so I'm not sliding a bearing on this shaft

But 30x17x7 is easy to find. Now I just have to cut the bearing apart to see how the races are machined onto the shaft. For all I know, there may already be a 17mm land on there.

The most unusual dimension is the width; or what would be considered the hight if it was sitting on a table. 39mm is a very wide bearing to have with those other two dimensions.

Yeah, it's because it is double row. But I'm fine with replacing it with two bearings and a spacer.

 

[Wamsutta]

Yeah, it's because it is double row. But I'm fine with replacing it with two bearings and a spacer.

Call Motion Industries before you give up. They may have some software that can find the bearing by entering in the dimensions.

 

[MattT]

1) Buy a new water pump bearing that has 5/8" shafts on both ends, thread one end, mill the other with a flat for the pulley, and press on a collar, or

I suspect these shafts are through hardened which'll make machining a challenge. Might not be able to get a heavy enough press fit to withstand the clamping force against the collar either.

2) Cut off the bearing on this shaft, build up the shaft around the bearing surfaces with bronze, and turn it down to 17mm. With a 17mm shaft, I can press on the 6903 bearing of my choice.

If you mean braze you risk warping the shaft.

Hate to be so negative but I think just making a new shaft might be the best option. And cutting the thread with a die would be easier than single pointing it. Just use the tailstock to hold the die square.

 

[rlitman]

You're right, the water pump shafts are probably through hardened since they're the inner race too. So, threading a blank one is out of the question.

But I'm not worried about warping it after brazing. I'll be turning it on centers after that anyway. Worst case, I touch up the shoulder on the collar while I'm turning it and it will still run true.

 

[metaldad]

x3 on motion industries - formerly berry bearing

 

[Rory Bellows]

Are the bearings off the shaft? You mention JAPAN == KOYO RSE is on the lip. If the bearings are still on the shaft possibly the other side has reference #'s. Refurbishing some machines I've learned manufactures use bearing with no info on them sometimes. I've bought bearings off eBay many times with excellent results even the cheap china ones.

 

[930dreamer]

Some motor data plates have the bearing numbers on them.

 

[DenisG]

Here's a bearing # with the right dimensions: 4224703Е.

 

[seber]

Pull the bearing out and read the number on the shoulder. Order that number.

 

[bpjr]

Try Boca Bearing in Florida. I've had good luck with them on obscure bearings that nobody else could help with. They have several ways to search or you can call. They will tell you quickly whether they have it or not. Last resort with them is sending the bearing in for them to check.

 

[fartymarty]

Just call me old thread reviver, so what happened here rlitman?

I'm hopefully getting an old Burr King 760 in the near future and I may need solutions such as whatever you've found.

 

[rlitman]

Just call me old thread reviver, so what happened here rlitman?



I'm hopefully getting an old Burr King 760 in the near future and I may need solutions such as whatever you've found.

LOL, nothing. Life left me with a non-running grinder on my work bench, and no time to continue. I think that at this point, I may just bit the bullet and buy a spindle straight from Burr King, since the part is readily available, and my time, clearly is not.



But I am REALLY looking forward to the day I get this running. It just doesn't look like a 2020 project at this time.

edit: Just to be clear, I have not forgotten about this thread, and I promise to follow it to it’s completion, whenever that may be.

 

[seber]

I've never encountered a bearing that was not marked with the number. Find that number on the race and any bearing house can match it.

 

[bpjr]

I've never encountered a bearing that was not marked with the number. Find that number on the race and any bearing house can match it.

It happens. My vintage 70s zebco spinning reels have no name or size and my Fox rc engines have only "singapore" on the rear crank bearing and no info on the front bearing. My K60 RJL rc engine has no markings on either bearing.

 

[seber]

It happens. My vintage 70s zebco spinning reels have no name or size and my Fox rc engines have only "singapore" on the rear crank bearing and no info on the front bearing. My K60 RJL rc engine has no markings on either bearing.

True, I wasn't thinking about those generics. I must have a few dozen of them too.

 

[thertel]

Lynne Scott at Accurate Bearings, [email protected]

She helps a ton of us over at OWWM.org locate bearings for old equipment.

http://owwm.org/viewtopic.php?f=1&t=93322

 

[RustyRelicRevival]

Burrking sells these for $140. I'm just trying to do the bearings myself as well.