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  1. Trailer Bearings Races Seals Caps
  2. Bearing Buddy
  3. Caps
  4. Bearing Protector Grease Cap
  5. 2.047 Inch
Bearing Buddy Bearing Protectors - Model 2047 - Chrome Plated (Pair)

Bearing Buddy Bearing Protectors - Model 2047 - Chrome Plated (Pair)

Item # BB2047
Our Price: $28.74
You Save: 56%
Trailer Bearings Races Seals Caps
Shipping Weight: 0.98 lbs
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Bearing Buddy Caps - BB2047
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Provide your trailer wheel bearings with premium protection - replace your existing grease caps with Bearing Buddies. They install in seconds and provide an easy, safe way to monitor and control the level of grease in your axle hub. Great Prices for the best trailer bearings races seals caps from Bearing Buddy. Bearing Buddy Bearing Protectors - Model 2047 - Chrome Plated (Pair) part number BB2047 can be ordered online at or call 1-800-940-8924 for expert service.
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  • Reviews (352)
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Bearing Buddy Trailer Bearings Races Seals Caps - BB2047

  • Caps
  • Bearing Protector Grease Cap
  • 2.047 Inch
  • Bearing Buddy

Provide your trailer wheel bearings with premium protection - replace your existing grease caps with Bearing Buddies. They install in seconds and provide an easy, safe way to monitor and control the level of grease in your axle hub.


  • Replaces the grease cap in the axle hub
  • Prevents wheel-bearing failure
    • Keeps water and dirt out of hubs and bearings
    • Allows boat trailer wheels to be completely submerged
    • Stops corrosion and pitting on bearings
  • Provides easily accessible grease fitting
    • Makes adding grease to the bearings quick and simple
  • Maintains slight, controlled pressure (3 psi) with spring-loaded piston, preventing water from entering hub
  • Prevents overfilling and rear seal damage with automatic pressure-relief feature
    • Grease seeps around piston edges and into barrel when full
  • Constructed of stainless steel internal parts and triple-chrome-plated steel barrel
    • Ensures longer-lasting fit than plastic or aluminum products
  • Includes rubber covers
  • Installs easily
  • Made in the USA


  • Fits 2.047" hub bore
    • Works with various outer bearing models
    • Works with outer bearing cup (race) model 07204
  • Lifetime warranty

Bearing Buddy installed diagram

Bearing Buddy Operation

Replace your existing grease cap with a Bearing Buddy to ensure a safe, easy way to monitor and control the level of grease in your axle hub. To adjust the amount of grease in the hub, use a grease gun to add more through the appropriate fitting. Adding grease moves the Bearing Buddy spring-loaded piston outward 1/8".

The O-ring inside the barrel of the Bearing Buddy maintains a seal from the outside. The interior of the Bearing Buddy is pressurized, preventing water from entering the barrel and diluting the grease.

An automatic pressure-relief feature is built into the Bearing Buddy. When the device is full, grease will seep around the edges of the piston and into the barrel. This prevents overfilling that can damage the inner seal.

You can manually check the grease level in your Bearing Buddy by pressing on the edge of the piston. If you can rock or move the piston, the hub is properly filled.

42400 Bearing Buddy Model 2047 - Chrome Plated (Pair)

Customer Satisfaction Score:

Customer Reviews

Bearing Buddy Bearing Protectors - Model 2047 - Chrome Plated (Pair) - BB2047

Average Customer Rating:  4.9 out of 5 stars   (352 Customer Reviews)

Provide your trailer wheel bearings with premium protection - replace your existing grease caps with Bearing Buddies. They install in seconds and provide an easy, safe way to monitor and control the level of grease in your axle hub.


Perfect fit For Heavy duty 1720lbs Harbor Freight Trailers. less then 10 min to install and fill with grease. etrailer needs to up date the web page to add HARBOR FREIGHT Trailers so people know where to find them My Hats off to etrailer for fast shipping and a Great price Thanks



1 yr review still work prefect and looking like new only added a 12 of shot of grease to each side Great price at etrailer Thanks Again


Stellar Tech and Customer support and quality product.

I have an imported folding trailer (HF 90154) & they do not stock protective hub covers for their trailer.

I contacted their customer support they provided me the hub dimensions (dust cap by diameter 52mm) , I then shared that info with etrailer tech support who directed me to the right bearing buddy product that I needed (2.047" or part# BB2047).

They shipped and delivered it in a timely manner. I installed it this morning and it seems to be working flawlessly as I would have expected from bearing buddy!

Added N.


part number BB2047 will fit the following Harbor Freight Trailers.. 90154, 42709, 90153.42708, 2575 and 2948, as all those trailers use the same Harbor Freight replacement dust cover, received mine and they installed with little effort great product..Thanks etrailer,com

Patrick B.


Thanks for the information, it's good to have.

Rick S.


A year later and the bearing buddy is doing its job with no issues to report! I know where to go when I need expert Trailer assistance - eTrailer!


Bearing Buddy is a good product. I had to use a block of wood and a small sledge hammer to put them on. They would not go on with a rubber mallet.
I measured 2.045" and the closest one from Bearing Buddy was 2.047"They are on and will not come off.... The trailer is a kit that I bought at depot in 1997... I would recommend
this product

Barth T.


theses also work for the northern tool 5 x 8 trailer... hard to find this sizethanks fits great


These are fantastic and actually fit the harbor freight hubs which are tough to fit. I bought these after losing the original hub covers and then suffering a complete bearing malfunction on a rafting road trip. Lesson learned. These allow me to keep the bearing greased on a regular basis with no mess. Easy to use and they create a vacuum to protect everything inside. Very intuitive.


Fast Shipping. Installation easy, fits well, grease expanded into cap just as described. Looking forward to many years of bearing life without having to pack the bearings again and again.



Working great! Check the bearing buddy before and after using trailer and keep them filled. Couldnt be happier with my results. I feel confident I wont have any bearing failure for lack of grease!


Prompt shipping, fair price, accurate advertising
The Bearing Buddy fit my little Harbor Freight Tag a Long trailer perfectly.
Your fitment description was spot on.



Bearing Buddy through trailer have given my little tag a long MC trailer trouble free confidence


Well made and a tight fit. Just what you want. Line it up properly and use a dead blow hammer and in it goes.


awesome addition and so much better than doing the old-school method of packing the bearings with grease.


Another prompt delivery of your quality product. Pleased as usual



Best ever. No leakage. Stayed put

Etrailer Expert

Mike L.


@Julie Great, glad to hear that!


Myself, I have been looking for nearly 3 years for the correct size, 2.047 and it was my friend that located your site. Both went on very snug. In the past I would purchase smaller ones and twist the
inner surface and shove them on with little effort and then fly off during my travels. These Bearing Buddys went on Solid ! Harbor Freight wasn't any help at all.


Easy installation and work great


Quick delivery, great price. Using on hubs of a pull behind motorcycle touring trailer to keep the bearings lubed.


Very tough to find size bearing cover. Not even the Specialty trailer shop in my area didnt have them. etrailer had them and shipped them out fast. Great website made finding what I need easy.


Installed the BB2047 Bearing Buddies on a Detail K2 MMT 5x7 trailer.
The trailer hub has a 1/8" grease fitting on the backside which is inaccessible even to a contortionist and the maintenance instructions call for repacking the wheel bearings by hand annually or every 2000 miles.
The best alternative for a 75 year old arthritic was obviously the Bearing Buddies.
They arrived as promised and each grease cap was changed out in less than 2 minutes.
The annual repack will be replaced with a couple of strokes of the grease gun on occasion as needed.
It doesn't get any easier than that.

Al F.


Working out just fine. Need to be less generous with my grease applications to avoid excess passing the rear seals and getting thrown onto the back side of my wheel rims.


This things are great. They arrived just in time and they fit perfectly on my Harbor Freight trailer.


The Model 2047 Bearing Buddy bearing protectors were a perfect fit for the wheel hubs on the Harbor Freight heavy-duty trailer that I am using as the base for my new home-built teardrop camper. Installation was straightforward and only took a few minutes per side. I am looking forward to many years (and miles) of trouble-free wheel bearings now that these bearing protectors are installed.

Steve D.


Bearing Buddy is still doing its thing after a 7136.5-mile trip out West over 34 consecutive days during the Summer of 2015. A shorter, 1500-mile roundtrip was made to SC in December. Overall, Im totally satisfied with the Bearing Buddy x2 performance thus far and cant wait for the weather to warm up a little more to take my little tear camper back on the road. Ill be heading east to New England this summer.


Excellent upgrade for my utility trailer. Easy to install and a very beneficial way to monitor and add grease to the wheel bearings. I previously had to pull off the trailer wheels to repack the bearings with grease but now I add a few pumps of grease before every road trip. My bearings will last longer and I have peace of mind. Great product!

Brian B.


Absolutely great!


Fit perfectly on my 1195 lb. 4x8 foldable trailer. Tapped them in with a wood block and hammer, filled with grease, and installed the rubber covers--all done in less than 5 minutes. Haven't road-tested yet, but no reason to expect any problems.

Steve L.


After 1 year and several hundred miles, theyre still doing great. Very pleased.


Well made, heavy duty. Fit well no trouble installing. Still in the hub after lots of bumpy road travel.


I am very pleased with the bearing buddy. I had lost the bearing cap and couldn't find a replacement at any auto shop. However, the BB2047 fit perfectly and keeps my bearings lubricated continuously. Replacing the cap did force me to repack the bearing, but that was probably a good thing as water had gotten in there. I feel the bearing buddy will protect my bearings probably for the life of the trailer; and since the grease is under positive pressure, water won't get in there.

Keith V.


The bearing buddies have worked flawlessly, my trailer is used not only on the road, but in the woods and dusty locations. The bearing buddies have never ped off, and keep the bearings well lubricated a clean.


Just received the pair of Bearing Buddy Protectors for my HarborFreight 1720lb trailer (#94564) - fit perfectly! Took less than five minutes to install, they have a nice tight seal and are now loaded with grease. Looking forward to having almost maintenance-free bearings!



Still working great after a year, Ive had no maintenance issues and have just added grease when needed. Would highly recommend!


The Bearing buddy I purchased looked good but are slightly larger that than the ID of the trailer hub that intended for. I measured it, and did internet searches on the trailer and Bearing buddy was the answer. That said, the Bearing buddy OD appears slightly larger than specified if my caliper measurement is correct. Wasted my money unless I am able to turn down the OD of the bearing buddy. It does look to be a quality product.

Etrailer Expert

Mike L.


This Bearing Buddy is intended to fit a 2.047 hub bore that uses a 07204 bearing race, and is meant to be a very snug fit, to the point where its suggested that a mallet or a dead blow hammer and a block of wood be used to drive it into place.


they fit perfectly, thanks to other reviews about Harbor freight trailors.


I was very impressed with my transaction with etrailer. Certainly, the customer service rep was the key to my satisfaction. She was knowledgeable, SO courteous! The bearings were a perfect fit! All is well and I will shop with etrailer again



Great !!!! Such a small feature for a great deal of security in knowing that the bearings will no fail. Been There, Done That !!!


Easy to install, makes it easy to grease my 12 year old bearings (yes-the bearings have been on my discount hardware store purchased trailer since built in 2007 and have at least 10000 miles on them with no problem) . No leaks. Great product!

Kevin J.


Trailer sat since last revue and I sold itin Feb 2020. My next trailer will have Bearing Buddies on it.

Show More Reviews

See what our Experts say about this Bearing Buddy Trailer Bearings Races Seals Caps

  • Dimensions of Bearing Buddy Bearing Protectors # BB2047
    The Bearing Buddies # BB2047SS are the only grease caps we have for the 2.047 inch hub bore. They also are available in Chrome plated # BB2047. Either Bearing buddy measures 1.776 inches from edge to edge and 1.483 on the outside of the hub without the rubber bra. I reached out to the manufacturer to confirm these measurements.
    view full answer...
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  • Are Protective Covers Included With Bearing Buddy Bearing Protectors
    The Bearing Buddy Bearing Protectors, part # BB2047SS are sold in pairs and come with the protective caps. These are stainless steel caps and are designed to fit 2.047 inch hub bore. The Bearing Buddy that is chrome plated is part # BB2047. These are also sold in pairs.
    view full answer...
  • What Size Bearing Buddies Will Fit a Harbor Freight Trailer 94564
    I actually called Harbor Freight about your trailer to determine what size dust cap is used on that trailer. I reached a tech and he stated that the dust cap is 52mm or 2.0488 inches. It looks like the best option is # BB2047 or # BB2047SS . However, you normally want them to be slightly larger than the hub bore to fit snugly. One thousandth of an inch may not be an issue but you need to be aware that it is not exact.
    view full answer...
  • Difference Between Bearing Buddy 2047 and 2047SS
    The difference is the material the Bearing Buddy is made from. The part # BB2047SS is made from stainless steel and the # BB2047 is chrome plated steel. Stainless will hold up to corrosion much better.
    view full answer...
  • Are Bearing Buddies # BB2047 and # BB2047SS the Same Size
    The Bearing Buddy # BB2047 and # BB2047SS are the exact same size. The # BB2047SS part number is made of stainless steel which won't corrode.
    view full answer...
  • Recommendation for a Bearing Buddy for a 2.044 Inch Trailer Hub Bore Diameter
    For a hub bore of 2.044 inches, you will need a Bearing Buddy that is slightly larger, like # BB2047, that you have referenced. You can also use Stainless Steel model # BB2047SS. The slightly larger size will ensure a tight fit and prevent the Bearing Buddies from coming off while traveling. I have included a video that, in part, shows our installer installing a grease cap starting at about the 3 minute, 11 second mark. He goes over some of the various methods of securing them into the...
    view full answer...
  • What Size Bearing Protector Will Fit a Harbor Freight Utility Trailer with 2.047 Inch Hub Bore
    With a hub center hole diameter of 2.047 inches, there are 2 Bearing Buddy options for you. First we have # BB2047 that you have referenced. These are chrome Bearing Buddies. The other option is a set of stainless steel Bearing Buddies, # BB2047SS.
    view full answer...
  • Recommended Bearing Buddy Bearing Protectors
    You are correct. The next size up for the Bearing Buddy Bearing Protectors is 2.047 inch. To order a pair you will need part # BB2047. If you want the stainless steel protectors, you will need to order part # BB2047SS. I recommend using digital calipers to measure the inside bore of your hub to make sure the # BB2047 will work for you.
    view full answer...
  • Bearing Buddy Recommendation to Fit Trailer Hub Bore 2.04 inch on Harbor Freight Trailer
    If your hub has a grease cap opening that measures 2.04 inch the correct Bearing Buddy is the part # BB2047 that you referenced. Or for a stainless steel version you'd want the part # BB2047SS.
    view full answer...
  • Availability of Grease Caps for 2.047 Inch Hub Bore Diameter
    The Bearing Buddy Bearing Protectors - Model 2047 - Chrome Plated (Pair) # BB2047 you looked at would be a great option for a grease cap that fits a 2.047" hub bore diameter. The other option you have would be the stainless steel version of these which is the # BB2047SS. Both have built in grease fittings to make adding grease quick and simple. They will do an excellent job keeping out water and dirt as well.
    view full answer...
  • How to Pick out the Correct Dust Cap Size for a Trailer
    The Bearing Buddy part # BB2047 is supposed to be a snug fit. If a 2 inch diameter cap is too small the # BB2047 should be the right fit. But without knowing what the diameter of the hub bore its hard to say that definitively. I would recommend you use a micrometer to determine the bore and go from there. I attached a page that has all of the grease caps we offer.
    view full answer...
  • Grease Cap/Bearing Buddy Availability for Harbor Freight Utility Trailer
    We have found that the Bearing Buddy part # BB2047 fits several Harbor Freight Trailers. Including the following trailers 90154 42709 90153 42708 2575 2948 Or, you can measure the bore of your hub where the cap would go with a digital caliper like part # ALL641130 to see what cap you would need. Once you know the size you need check out the link I attached to see all of the caps we carry. You will need to select your size from the filters.
    view full answer...
  • Why Do Bearing Buddies Fall Off of a Trailer Hub
    If the Bearing Buddies are not the correct size or are not driven in straight then they can fall off due to the centrifugal force when the wheels spin. To ensure you get the right size you can go by the bearing numbers of the hubs or measure the hole where the Bearing Buddies sit using dial or digital calipers to get the most accurate measurement. To drive in a Bearing Buddy the manufacturer recommends using a block of wood held against the Bearing Buddy and then driving it in using...
    view full answer...
  • How to Pick Out Replacement Trailer Axle for Harbor Freight Trailer
    Harbor Freight trailers don't use standard trailer axles so replacing the hubs gets challenging so replacing the axles would be the way to go. I'd need the distance between the spring centers of your current axle as well as the distance from hub face to hub face and I'd be able to pick out the correct axle for your application. You'll also need the bolt pattern of the wheels you have to pick out which I attached a help article on determining. I also attached a link to a page that has...
    view full answer...
    Image 1 for
  • Bearing Buddy Recommendation for a Harbor Freight Trailer 92174
    Most likely the Bearing Buddy Bearing Protectors - Model 2047 # BB2047 that you referenced would be the correct Bearing Buddies for your Harbor Freight trailer since these have been confirmed to fit several of the other model Harbor Freight trailers, but since we haven't confirmed it yet you will need to measure the hub bore of the hubs on your trailer. If the hub bore is 2.047 then these would work for you.
    view full answer...
  • Grease Cap Recommendation to Fit Hub of Harbor Freight Utility Trailer with Bore 2.050 inch
    The best option we have is the Bearing Buddy part # BB2047 which is a fit as it is designed to fit hub bores of 2.047 which is very close to what you have.
    view full answer...
  • Is Bearing Buddy BB2047 Thread In or Press In
    Hey Robert, the Bearing Buddy part # BB2047 is not threaded. It would get tapped in.
    view full answer...
  • In What Quantities Are Bearing Buddies # BB2047 Sold
    The product you referenced, Bearing Buddy Bearing Protectors Model 2047 # BB2047, are sold as a pair, enough for one axle. Each kit includes two Bearing Buddies and two rubber covers that fit over the bearing protectors after you've filled them with grease. If you have a tandem axle trailer you will need to order one kit for each axle, so that you get a total of four protectors and four covers. This kit fits hubs with a bore of 2.047-inches. I have linked an installation video for your...
    view full answer...
  • Replacement Hub for Harbor Freight 4 x 8 Trailer
    The downside to buying a "bargain" trailer kit is that customer support, both in terms of helpful information and available replacement parts, can be scarce. The other issue is that products made to sell at a tempting price point may not consistently use the same parts, as in when the manufacturer can suddenly obtain less costly components and makes a running change that is not documented. For finding new hubs the best way to go is to pull one hub from the spindle and to remove the bearings...
    view full answer...
    Image 1 for
  • Will Bearing Buddies Fit on EZ Lube Trailer Axles
    Bearing protectors such as Bearing Buddies # BB2047 cannot be used with EZ Lube axles. The issue is the zerk fittings at the ends of the spindles prohibit installation. The Bearing Buddies are not deep enough to account for the zerk fitting. Since you have EZ Lube axles you would not need this type of cap. I can recommend other options if you can tell me the hub bore diameter where the caps fit. The measurement has to be as accurate as possible so use calipers that can measure to the nearest...
    view full answer...
  • Which Bearing Buddy for Harbor Freight Trailer 62648 & 62666
    The Bearing Buddy we have found that fits most of the Harbor Freight trailers is the part # BB2047 which would be the correct one for if your hub bore was 2.047 inches. I'd recommend verifying that measurement on your trailer hub bore.
    view full answer...
  • Are There Bearing Buddy Bearing Protectors for 5 x 8 Northern Tool Trailers
    The best size match we have for a 2.035" hub bore is the Bearing Buddy Bearing Protectors part # BB2047 which measure 2.047". It's possible they will work but these trailer don't really use industry standard parts so there's a possibility it won't as well, test fit would be the only means to confirm.
    view full answer...
  • Troubleshooting Grease Seal that Keeps Blowing Out on Trailer Axle
    It sounds like your problem may be that you are installing too much grease into the hubs and that is why they are blowing out. If you are pumping your grease into your hub with a grease gun you should note that you should only continue to add grease to the hub until you begin to see the outer bearing move or you see grease seeping through the outer bearing. If you pump the grease slowly and rotate the hub, you should not blow the grease seal. Once you see the grease seeping through, you...
    view full answer...
  • Can Bearing Buddies BB2047 be Added to Camper Trailer
    Your camper trailer can absolutely use the Bearing Buddies like the Bearing Buddy Bearing Protectors - Model 2047 # BB2047. These simply replace your existing grease caps and won't get grease into your brakes; they will keep your hub and bearings better protected from dirt and water than standard grease caps so they are a good addition for your trailer. You just need to make sure you have the correct ones, and to do that you will need to measure the hub bores on your trailer's hubs using...
    view full answer...

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