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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 2047SS - Stainless Steel (Pair)

Bearing Buddy Bearing Protectors - Model 2047SS - Stainless Steel (Pair)

Item # BB2047SS
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Trailer Bearings Races Seals Caps
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Bearing Buddy Caps - BB2047SS
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Great for marine applications; the stainless steel construction provides the best in corrosion resistance. The design makes Bearing Buddy an easy way to protect your bearings by keeping water out and ensuring enough grease is in the hub. Great Prices for the best trailer bearings races seals caps from Bearing Buddy. Bearing Buddy Bearing Protectors - Model 2047SS - Stainless Steel (Pair) part number BB2047SS can be ordered online at or call 1-800-940-8924 for expert service.
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Bearing Buddy Trailer Bearings Races Seals Caps - BB2047SS

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

Great for marine applications; the stainless steel construction provides the best in corrosion resistance. The design makes Bearing Buddy an easy way to protect your bearings by keeping water out and ensuring enough grease is in the 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
    • 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.

42408 Bearing Buddy Model 2047SS - Stainless Steel (Pair)

Customer Satisfaction Score:

Customer Reviews

Bearing Buddy Bearing Protectors - Model 2047SS - Stainless Steel (Pair) - BB2047SS

Average Customer Rating:  4.9 out of 5 stars   (134 Customer Reviews)

Great for marine applications; the stainless steel construction provides the best in corrosion resistance. The design makes Bearing Buddy an easy way to protect your bearings by keeping water out and ensuring enough grease is in the hub.


I bought a used trailer, and one of the bearing hub caps was not there. I have bought 3 different sets of hub caps, but none of them fit. I called E Trailer, and they sent me these. They fit!!!! Makes me happy!!


Great addition to any trailer used in wet, sloppy conditions. Not just boat trailers. I added a pair to an ATV trailer that is used in very muddy terrain.
Very easy to install, but care should be taken to be sure you select the correct size as there are a number of sizes that are very close together. I suggest removing the old grease cap and measuring the inside diameter with a caliper.
Also the addition of bearing buddies makes checking the amount of grease and refilling your hubs much easier to do.
The Stainless variety are a couple bucks more but worth every penny.
Would Highly recommend to anyone.


Originally I had to tip my trailer back crawl underneath to get to the grease fittings underneath and the grease would ooze out of the bearing caps and inner seals, then consequently spinning all over my rims and making a big mess. I'm more than pleased with my new bearing buddies as they couldn't be any more accessible and that they are spring loaded to keep the grease where it's meant to be, on the bearings and also make it easy to know when they are full.


These things are great! Easily the best part of my Harbor Freight trailer now. ;) Fit is perfect, and installation was very simple. I pre-filled them with grease, using about 1/2 of a 3oz mini grease cartridge on each. Hammered them on and then filled them up the rest of the way with a few squeezes of the grease gun.


Love the Bearing Buddies received from etrailer. We put them on a motorcycle trailer and they work awesome.
Thanks etrailer for helping me order the correct parts!


Perfect fit and quality construction. The bearing buddies will protect the bearings on my motorcycle trailer. Makes getting grease into the bearings simple and convenient.
The grease cap was a replacement for one that came off of my travel trailer.


The 2.047" is a perfect replacement for the 52mm [hardware store] dust cap. Nice, snug fit.


Always get excellent service, got my trailer back on the road, thanks Bay


Installed Bearing Buddy Bearing Protectors on a boat trailer to keep the bearings pressurized during launch and retrieve to keep water and grit out of the bearings. They had adequate clearance from the axle so the piston did not rub and they had a good tight fit when driven on with a hammer and block of wood. Quality is excellent.

The pressure relief feature and spring loaded piston are great since previous zerk hubs already on the axle did not have that feature and the grease seal blew off when pumping grease into the bearings. Be sure to measure your hub diameter accurately before ordering.

Bruce J.


The Bearing Buddy protectors are still working well.


I have a harbor freight 4x8' folding trailer and I purchased these bearing buddies for longer trips. They work great keeping the axle bearings lubricated and pushing out the used grease as well.

The installation was a bit difficult on one side, but this is due to the trailer itself. I was able to get it square and pressed in with a hammer and block of wood. The other side was a much easier install.

Haven't lost the end caps yet either, after a few hundred miles of use!

John B.


After 1 year of use, these are still working perfectly and have made my trailer maintenance much easier.


After much searching, I finally found the correct size bearing protectors for an older Harbor Freight trailer. I had been searching for a metric size and the BB2047SS protectors fit great! The 2.047" size is exact and with the stainless steel material, the size has to be exact, the stainless does not give. These protectors will probably outlast my trailer. The rubber caps are a nice addition to keep dirt off of the grease fitting. Overall, very impressed. Will be purchasing a set of these for my other twin axle trailer.

Wayne S.


These bearing protectors are working out great, probably have 20 trips to the mountains hauling equipment 230 miles round trip and they are holding up great. Surprisingly the rubber dust caps have also stayed on and held up in severe weather conditions with both heat and snow. Bearings and seal were also replaced and are all holding up well now that the grease stays where its supposed to. Overall, a great product!


Excellent product bought haul master trailer from harbor freight , bought a set of haul master bearing buddies didn’t fit haul master trailer worked on bearings for a few hours making sure they were properly installed my wife found a video on YouTube about this problem and your company came up with the solution.Fast service ,good price, and received in 3 days.


Great product. Installed 8 on a trailer restoration. Very easy to install.


Perfect protection for wheel bearings at a very low cost. I used Bearing Buddies on a trailer that I built 20 years ago. After many uses and spending 2 decades in the California sun and rain, I sold that trailer and the hubs and bearings looked and worked as if they were new. My buyer was delighted. This is the most effective and least expensive protection you can give your trailer.
Tip: measure the hub I.D. carefully and buy the Bearing Buddy set that most closely matches your hub bore. Remember that they have an interference fit. TIGHT fit is very important.

David K.


Perfectly! Fantastic product at a low cost.


Couldn't find the appropriate fit for my trailer in Canada, but the company that manufactured the trailer recommended etrailer as a likely source - and they were right. The review that indicated that this was the right buddy bearing for my particular trailer was exactly right as well. I picked up the parts yesterday and installed them the same day. The fit was perfect, the instructions were perfect and install was perfect. I feel way more confident about hauling my stuff to Newfoundland with these bearings taken care of. Thanks Etrailer.



Thanks for the follow up to my review - Im currently getting ready for the 3000 km road trip to Newfoundland with a fully loaded trailer. My Buddy Grease Caps are loaded with grease and have no doubt they will perform well throughout the trip.


I gave this product and excellent rating because etrailer carries it, it is going to be mounted onto the harbor freight trailer item # 90154 hubs. Now from what I've read this is not an exact size the size difference is minimal,but should fit, only time will if they hold up to the rigors of use, but I'm glad this option is available ! Any product that can make such a dirty task of greasing bearings easier has to be great. Shipping was fast!



Have not mounted them yet as life got in the way, but will be installing them soon, will update when i start using the trailer, but as before the great things is that e-trailer carries this model for this particular trailer.


Work as advertised; etrailer delivers!


Awesome, the bearing Buddy fit like a charm. Great service as always


I use bearing buddies on all my trailers and highly recommend them especially for boat trailers that go under water regularly. Buying from etrailer was a little more expensive than the big box store, but I was impressed that they called the manufacturer of my Trailer to be sure they sold me the correct size. Imagine: an online company that cares enough to check ahead of time! etrailer earned my business.

Ed C.


After a year they’re still working as planned. If and when I need anything for a trailer I’ll buy it here.


I bought my trailer from another store with the regular bearing caps on the hubs. I bought the bearing buddies from them later and they did not fit. After a little research I found out that what I needed was .2047inch and what I had bought earlier was 1.98inch. Etrailer has several sizes, .2047inch fit perfect. Got them in the mail in 3 days.





Just installed on my folding freight harbor 1720Lb trailer (5.30 x 12 tire, 5 lug nuts), fast shipping, easy installation, quick and easy fill up with grease, just follow instructions.



working perfect, no problems


I bought these bearing buddies for a trailer that I modified to put a boat on. I put them on other boat trailers I had and never had a problem with water getting in the bearings so I know they do the job they are made for.

Rodger L.


used them all last year going to the lake 3 or 4 times a month and putting the boat in and out of the water and have had no problem. Theyve kept the water out of the bearings of my Harbor Freight trailer.


Only company that had this size Bearing Buddy and I must have called or e-mailed 75 business's ! Great shipping, Part arrived in one business day! Will order all my boat parts needs from e-trailer from now on! Wish I would known of this company two weeks ago! Would have saved me a lot of time and energy! Rate them AAÀAAAAA+++,Thanks Again !

Edward G.


Still owrks fine, only problem is that it came with no installation instructions, That would have been nice however


I have a odd size hub on my utility trailer and was having a tough time finding bearing buddy's that would fit correctly:( You guys came through with the correct size:) The bearing buddy's are a perfect fit and have met my expectations for quality! Definitely Recommend:)


This is the only way you should haul your boat trailer around if in and out of the water.The bearings are under constant pressure keeping out water and lubing also. This is the 3nd set I have bought and have them on all my trailers. I stated years ago and I have never had any issues sense I started using the Bearing Buddy. Pays for it self over and over again. The longer you have the trailer with the Bearing Buddy the more time and money you save!

Show More Reviews

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

  • Bearing Buddy Bearing Protectors For a Detail K2 MMT5x7G Utility Trailer
    I was able to verify with Detail K2 the 2.047" hub bore size is what they currently use on their trailers. They did mention you could have a different size depending on the age of the trailer as they did not always use the same size hubs. Since you mentioned the Bearing Buddy Chrome # BB2047 or Stainless Steel # BB2047SS were to small to fit you will likely need the Chrome # BB2080 or Stainless # BB2080SS. These are for a 2.080" hub which is only 33 thousands of an inch larger in diameter.
    view full answer...
  • Bearing Buddy Recommendation for a Harbor Freight Trailer
    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.
    view full answer...
  • 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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  • Bearing Buddy Grease Caps for Hub Bore Dimension of 2.05-Inches
    Bearing Buddy bearing protector grease caps are made in many sizes and we carry those most often used in recreational trailering. You can see all Bearing Buddy parts we have by clicking on the page I linked for you. Bearing Buddy grease caps are made both with and without threads so you'll want to check your hub bore to see if it is threaded or not. Click on the appropriate type on the page. For a dimension of 2.05-inches you can use a Bearing Buddy kit in size 2.047-inches, such as either...
    view full answer...
  • Why Wouldn't a Trailer Come Equipped with Bearing Buddies
    Some axles have EZ lube spindles which means they have a grease fitting mounted at the end of the spindle already. In those cases you would not want a Bearing Buddy. Since the EZ lube spindles are more common than non-EZ lube spindles the Bearing Buddies aren't seen as frequently as you would think. Aside from that they are a great product. We only warn people to try and be careful not to over fill the hubs with grease as that can be pretty easy to do. This causes the seal to blow out.
    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...
  • Which Bearing Buddy Size Will Fit A 1.984 Hub Bore
    The Bearing Buddy Bearing Protectors, part # BB2047SS, fits a 2.047 hub bore which would be too big for your 1.984 hub bore. The next closest size I would have in a Bearing Buddy is the Bearing Buddy Bearing Protectors, part # BB1980A-SS. If you can pull your wheel bearings and get the bearing part numbers that would help you with which Bearing Buddy to use. The part # BB1980A-SS works with outer bearing models L44640, L44643, and L44649. The Bearing Buddy pages also have listings on...
    view full answer...
  • Would Bearing Buddy BB2047SS Fit Trailer Wheel AM31208
    Bearing Buddies aren't normally picked out based on wheel size since they fit into the trailer hub bore, but the diameter of the Bearing Buddy # BB2047SS is compatible with the trailer wheel part # AM31208. The diameter of the Bearing Buddy is 2.047 and the center hole diameter of the wheel is 2.80 inches.
    view full answer...
  • Grease Cap Recommendation for a Harbor Freight Trailer 90154
    The 2.09 grease cap that you tried might be the one to use. They are supposed to be a tight fit and require being tapped in with a hammer and a flat piece of wood like a 2x4. There is a Bearing Buddy that fits right between the two sizes you have tried though. The part # BB2047SS has an outer diameter of 2.047 inches.
    view full answer...
  • Bearing Buddy FOR Harbor Freight Super Duty Folding Trailer 1720 lb Capacity
    I am here to help the best I can. Based on your measurements you provided, Part # BB2047SS is the the part you are looking for.
    view full answer...
  • Grease Cap Options For 5 Lug Hub Where 1.98" Grease Caps
    Hello Wayne, thanks for reaching out. The 1.98" grease caps are very common for the 5 lug hubs, so it is a bit odd to hear they aren't fitting. We do have the Grease Caps # RG04-040 which are a 1.99" OD. There are also some bearing buddies # BB2047SS which are for a 2.047" pilot hole, or the # BB2080 which are for a 2.080" pilot hole. If you were to measure the hub pilot with a caliper it should tell us more accurately what size you will need. Feel free to post that measurement in the...
    view full answer...
  • Choosing Correct Bearing Buddy to Replace 2 Inch Grease Cap on Trailer
    We have a few Bearing Buddy Kits available that are close to the 2 inch measurement you mentioned in your question. I recommend measuring the diameter of your hub bore using a digital caliper like # PTW80157. This will give you an exact measurement, which will be needed when selecting the correct size Bearing Buddy for your trailer. For example, the Bearing Buddy Bearing Protectors # BB1980A-SS are designed for 1.98 inch hub bores and # BB2047SS are for 2.047 inch hub bores. We also have...
    view full answer...
  • Finding Bearing Buddy Bearing Protectors For a Old Motorcycle Trailer With 4 on 4" Lug Pattern
    I wish I had a way to look up the parts installed on your holsclaw MB9 motorcycle trailer so I could say exactly what you need but unfortunately that is not an option we have. I am going to need you to pull off one of your grease caps and measure the bore diameter on your hub using a Digital Caliper # PTW80157. With that measurement you will be able to select the correct size bearing buddy from the list below. 1.781" Inner Hub Press # BB1781SS 1.810" Inner Hub Press # BB1810 1.938" Inner...
    view full answer...
  • Replacement Grease Caps for a Trailer Hub with 2-1/16 Inch Hub Bore
    Instead of measuring the grease cap, measure the hub bore where the grease cap fits. You will need the most accurate measurement as possible so use dial calipers. You may find that you have a 2.047 inch bore so you could use bearing protectors like # BB2047SS. Or it could slightly larger, 2.080 like # BB2080. These are the 2 most likely sizes if you are coming up with 2-1/16 inches but measuring the hub bore with dial calipers would be the way to go.
    view full answer...
  • Standard Grease/Dust Caps Won't Fit Hubs on Trailstar Boat Trailer
    It sounds like your trailer has the stubby spindles on it that are usually associated with boat trailers. It is possible that you will need a special dust cap to fit it if there isn't enough space for a standard one (the trailer manufacturer should be able to direct you to the best option). But there is another possible solution. If you can tell me the diameter of the wheel center pilot hole I can see if center cap is available. There are Bearing Buddies, # BB2047 or # BB2047SS that are...
    view full answer...
  • What Bearing Buddy Will Fit Trailer Hub Assembly # 8-258BTUC1
    I went out to the warehouse and did a test fit between the hub, # 8-258BTUC1, and Bearing Buddies, # BB1980A. The Bearing Buddies, though they are 6 thousandths of an inch smaller, will still fit tight in the hub bore. Bearing Buddies have to be driven in by putting something like a block of wood on the top and hitting the wood with a hammer. The wood disperses the energy from the hammer more evenly.
    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...
  • What Size Grease Zerk Is On The Bearing Buddy?
    The standard grease zerk fitting is 1/4" and that is what comes with most if not all the bearing buddys # BB2047SS. I've only had to mess with one standard size and use the Performance Tools Grease Gun # PTW54290. I suggest getting one because keeping your components greased up prolongs the life of that component.
    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...
  • Why A Bearing Buddy Is Not Recommended On A 1986 Dodge Ram D100
    The Bearing Buddy bearing protectors are designed for use on boat trailers. On boat trailers, when the trailer is submerged into water the sudden cooling of the bearings causes a vacuum that will try to suck water into the bearing area. This water will break down the grease and also contaminate the grease with dirt, which will cause corrosion and pitting on the bearings of your trailer axle. The Bearing Buddy bearing protectors will fill the axle hub with grease which will keep a slight...
    view full answer...
  • Bearing Buddy Bearing Protectors For a Utility Trailer With 2-1/16" OD Grease Cap
    To verify the correct Bearing Buddy bearing protectors to replace your grease cap you will want to remove one of your caps and measure the inside diameter of your hub bore using a Digital Caliper # PTW80157. This will help you verify the exact measurement needed for hub. Here is a list of the closest sizes we have to the 2-1/16" you measured with a ruler. 1.980" Hub Bore # BB1980A-SS 2.047" Hub Bore # BB2047SS 2.080" Hub Bore # BB2080SS
    view full answer...
  • Bearing Buddy Bearing Protectors For a Hub Between 2" and 2-1/4"
    For the Bearing Buddy we have the following sizes which you will need to verify for your hub. 2.047" # BB2047SS 2.080" # BB2080SS These are the only Bearing Buddy's we have smaller than the 2.240" # BB2240SS and above 2".
    view full answer...
  • Bearing Buddy Sizes for Replacing Grease Cap on Utility Trailer
    I would first recommend getting a Digital Caliper # PTW80157 to measure the hub that the Bearing Buddy will be pressed into. This will insure that you have a correct fit. Bearing Buddy Sizes -1.781" # BB1781SS -1.810" # BB1810 -1.938" # BB1938SS -1.968" # BB1968SS -1.980" # BB1980A-SS -2.047" # BB2047SS -2.080" # BB2080SS -2.240" # BB2240SS -2.328" # BB2328SS -2.441" # BB2441SS -2.562" # BB2562SS -2.717" # BB2717SS
    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...

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