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  1. Trailer Bearings Races Seals Caps
  2. Bearing Buddy
  3. Caps
  4. Bearing Protector Grease Cap
  5. 1.781 Inch
Bearing Buddy Bearing Protectors - Model 1781 - Chrome Plated (Pair)

Bearing Buddy Bearing Protectors - Model 1781 - Chrome Plated (Pair)

Item # BB1781
Retail:$33.42
Our Price: $24.78
You Save: 26%
Trailer Bearings Races Seals Caps
Shipping Weight: 0.85 lbs
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Bearing Buddy Caps - BB1781
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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 1781 - Chrome Plated (Pair) part number BB1781 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (60)
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Bearing Buddy Trailer Bearings Races Seals Caps - BB1781

  • Caps
  • Bearing Protector Grease Cap
  • 1.781 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.


Features:

  • 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


Specs:

  • Fits 1.781" hub bore
    • Works with outer bearing model LM-11949
    • Works with outer bearing cup (race) model LM-11910
  • 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.



41200 Bearing Buddy Model 1781 - Chrome Plated (Pair)





Customer Satisfaction Score:


Customer Reviews

Bearing Buddy Bearing Protectors - Model 1781 - Chrome Plated (Pair) - BB1781

Average Customer Rating:  4.9 out of 5 stars   (60 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.

by:

Just installed them on the trailer. These are awesome! I feel much better about taking my boat to the bay with the added security of knowing I'm not going to get saltwater in my bearings.



by:

Everything looks good.



by:

Fast shipping fit perfectly



by:

These are a must for a boat trailer. I have them on my other boat and they work great. I appreciate your fast service and excellent advise. I will be ordering additional items in the next few weeks.

Ronald

4/28/2019

I used Bearing Buddies on my other boat trailer. I grease them every year with marine grease and nvere had a problem.



by:

Simply fantastic service. Adjusted my order on the fly and made sure it got to me on time, for a hassle free long-distance trip. Thank you Carol!

As for the product -- I went with 1980 SS in the end. Easy to install, load with grease. My trailer's wheels were blissfully silent across an 800 mile round trip.

(Now to return the ones I didn't need...)



by:

Though I have not installed these Bearing Buddies yet, this review is about the excellent customer service I received from eTrailer. My issue was grease flying from my bearings. The folks at eTrailer explained my issue, provided the necessary tool to measure the ID of my hub and directed me to the correct Bearing Buddy for my application. I have been a long-time customer of eTrailer and will continue to be! You can't beat the service and help they provide!



by:

I was trying to sell a boat and trailer, and when I put the buddy bearings on the trailer it was sold in two days, and the people said anyone who puts bearings on an old trailer takes care of his stuff.Thanks for the products. Terry.



by:

The Bearing Buddie worked great. I used it on my boat trailer, installing one on each wheel, easy to regrease after using it. Would definitely recommend it .



by:

These units come with the bra covers included, and they installed easily. I used a block of tropical hard wood to protect it, then I hit it on with a small sledge hammer. This is one of those quick easy jobs you can do that will have long-term implications for the useful life of your trailer. They're of good quality, and I'm proud to have it on my rig. I packed them with a waterproof green grease, because of the climate where I live. Initially I tried to order from Amazon, but they didn't ship to Hawaii, which is plain awful. Thankfully eTrailer shipped ultra-fast and for a reasonable price. Will be returning here from now on for trailer stuff.



by:

If you do not have these on your trailer yet the question would be WHY NOT? An absolute staple for any boat trailer. Keeping your bearings in top shape is number one and this is THE product for it.



by:

I'm extremely pleased with etrailer's service from purchase to delivery. Of course, the product, "Bearing Buddy", speaks for itself, always has been an excellent product. I will buy other items from etrailer.com as the need arises because they are competitive and service oriented.



by:

I wasn't sure if these would fit integral hub rims from the 50's, but sure enough, they did. They fit pretty tight, so I'm not worried about losing them, and they will save the headaches of pulling the bearings every year to re-pack them, as long as the springs have a little compression on them, I know they're good to go.



by:

Fit and finish excellent. Rubber caps included a real bonus.
Thanks



by:

Received the wrong size first. The customer service was wonderful replaced with the right size and sent shipping label to send wrong ones back it's hard to find good service now days but they did great



by:

Great product. Etrailer is always my first place to shop.



by:

Great product and company. I found these grease buddies for my outdated boat trailer. Could not find any in my home town. Thanks etrailer.com for coming through.



by:

Product was as advertised and was a perfect fit. These were use to restore my fathers fishing trailer her bought in 1955 at Sears. The trailer is up an running these days to do pleasure boating in the nearby pond. Thank you.



by:

Haven't put them on yet,, but was easy to order and receive. If I need anything else I will be e-mailing or calling.



by:

Everything arrived on time are all parts seem to be there so I think I'm in good shape



by:

Found just want I needed. I have use them a couple of times and I have always been pleased with the service.



by:

Nice bearing Buddy set, perfect



by:

Very quick service. Parts were as expected and worked very well. Thanks!



by:

The buddy bearing I purchased work great. Went right like it was supposed to, and won't have to go through the hassle to return it.



by:

Great product I would order products from etrailer again



by:

Worked perfectly Thanks

Charles

4/26/2022

Still working great would definitely recommend this product to everyone


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Show More Reviews

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

  • Can Trailer with EZ Lube Spindles Have Bearing Buddy Installed
    Sorry about any confusion! A Bearing Buddy can install on a EZ lube hub/spindle but you are going to have to take the zerk fitting off of the spindle to allow the Bearing Buddy to fit and have the needed clearance. You can yank it off with a pair of pliers or vice grips. If they are threaded (should see a hex pattern around outside of fitting) you could also use a small wrench to take the fitting out. Aside from the zerk fitting on the spindles of the EZ lube spindles there's no difference...
    view full answer...
  • Which Bearing Buddy for 2.325 Hub Bore
    Given the dimension you kindly provided, you'll need # BB2328 for chrome plated or # BB2328 for the stainless model. If you're in a marine environment, you'll definitely want the stainless model. Either is designed for a 2.328 inch hub bore. To absolutely confirm fit, your outer wheel bearing should be LM67048.
    view full answer...
  • How To Properly Measure For Bearing Buddy Bearing Protectors?
    Do determine the correct bearing buddy for your 2004 Ranger 521vx you will need to find the hub bore diameter or the outer bearing size. To find the hub bore you will need a Digital Caliper # PTW80157. You will be able to remove the grease cap and measure the hub bore as seen in the picture. If you have a threaded hub bore this is the only way to measure. Another way is if you know what size your outer bearing is on your hub. With the bearing size we can identify the race and use its...
    view full answer...
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  • Which Bearing Buddies Fit Titan Trailer Hub DX22XR
    Trailer hub # DX22XR uses outer bearing LM11949 so you can use Bearing Buddy Bearing Protectors - Model 1781 - Chrome Plated (Pair) Item # BB1781. Or you can use Bearing Buddy Bearing Protectors - Model 1781SS - Stainless Steel (Pair) Item # BB1781SS for a stainless steel version.
    view full answer...
  • Does Phoenix USA QuickTrim Hub Cover PXQT545WHS Fit Over Bearing Buddy Grease Caps
    To find out if the Phoenix USA QuickTrim Hub Cover # PXQT545WHS has the depth and inside diameter to allow use of Bearing Buddy bearing protectors like # BB1781 I went to our warehouse and measured this item. The overall inside depth of the cover is 3-inches. The inside diameter of the narrow center part where a Bearing Buddy would be measures 2-1/4-inches. This should be fine for all but the largest Bearing Buddy grease caps.
    view full answer...
  • How To Determine Which Bearing Buddy Will Fit Single Axle Trailer
    The best way to find the right Bearing Buddy for your trailer is to get a precise measurement of the inside diameter of your hub. You can use a digital caliper like part # PTW80157 to get that measurement and then check out the attached link to our product page for the Bearing Buddies we have to offer.
    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...
  • How to Determine Which Replacement Wheel Bearings Are Needed
    Check the existing wheel bearings for the reference numbers as shown in the provided photo. If the bearings are damaged and the number can't be read, try pulling the other wheel on the axle and looking there. If you can't make out any of the numbers, measure the diameter of the spindle that the inner and outer bearing rides against. A digital caliper like # PTW80157 is recommended for measuring the spindle diameter. I've linked to some videos showing how to access the wheel bearings in...
    view full answer...
    Image 1 for
  • Can Bearing Buddy Grease Inner and Outer Trailer Hub Bearings
    Bearing Buddies can add grease to a hub and in general they do grease the inner and out bearing since it has to push all the way through the hub but if you want to make sure both bearings are greased well it's always best to do it by hand.
    view full answer...
  • Troubleshooting Grease Seal Failure when Using Bearing Buddy Bearing Protectors
    Bearing Buddy Bearing Protectors like # BB1781 have a spring loaded pressure in their design. There are times that this pressure will cause a failing seal to leak and high altitudes would be another aspect that could cause leaking to happen. When using Bearing Buddy Protectors, I recommend at minimum using a double lipped seal but the manufacturer also has a special seal for some spindle measurements like the Spindle Grease Seal Set for LM67048 Inner Bearing and 1.781 Bearing Buddy # BB60007.
    view full answer...
  • Are Bearing Buddies Measured in Inches
    I am not sure what you mean. Bearing Buddies are measured in inches. For example # BB1781 is 1.781 inches. Measurements have to be as accurate as possible so when measuring the opening on a hub for bearing protectors use dial or digital calipers, not a tape measure. I also might be able to figure out the size you need based on the outer bearing number stamped into the side of the bearing.
    view full answer...
  • Can Bearing Buddy Bearing Protectors Be Over-Filled with Too Much Grease
    It is possible to over-fill a hub that has a Bearing Buddy bearing protector such as # BB1781. The convenience of easy filling through the zerk fitting can often mean we can be tempted to keep adding more grease. ("If a little is good, then more is better"). What usually happens is that the rear grease seal gets blown out from the excess grease/pressure and so I suggest you inspect your grease seals to make sure they are still intact and without excess grease having been pushed out past...
    view full answer...
  • Bearing Buddy that Fits Hub Bore Around 1.75 inch
    If the hub bore is 1.5 inches like you mentioned (the area of the hub where the cap installs) then we don't have a Bearing Buddy that will fit. If the measurement was more like 1.75 inch then the # BB1781 would most likely fit as it measures 1.78 inches.
    view full answer...
  • How to Add Grease to Super Lube Trailer Hub with Rear Grease Zerk Fitting
    The rear side of a Super Lube hub has a grease zerk fitting that works like the one on a Bearing Buddy grease cap such as # BB1781. These zerk fittings let you add wheel bearing grease to the hub interior without having to remove it from the spindle. The claimed advantage of the Super Lube hub is that the rear zerk fitting gives you the same grease fill convenience as a Bearing Buddy but without the risk of blowing out the rear grease seal from the pressure of pumping in too much grease....
    view full answer...
  • Do I Need To Grease my Bearings Before or After my Road Trip
    You will only need to add grease if it is needed. If you too much grease you will blow out the grease seals which will end up as a mess. Bearing Buddies have a spring-loaded piston that keeps pressure on the grease in the hub. The closer the piston is to the outer edge of the Bearing Buddy, the more compressed the spring is and the more full the hub is. You should be able to look at your Bearing Buddy # BB1781 and see how full it is to determine if you will need more grease for your trip.
    view full answer...
  • How To Help Bras Stay On Better When Using Bearing Buddy Bearing Protectors - Model 1781
    If you're having trouble with the bras staying on the Bearing Buddy Bearing Protectors - Model 1781 part # BB1781 then you can wrap the exterior of the bearing protectors with electrical tape which adds thickness and should help the new Replacement Bearing Buddy Bras part # BB17B stay on better.
    view full answer...
  • How Do I Determine Which Bearing Buddy Bearing Protector Will Fit My Aspen Motorcycle Trailer
    The best way to make sure you receive the correct Bearing Buddy bearing protector is to measure the inner diameter of the hub bore (see photo). Unfortunately, the manufacturer of Aspen trailers does not provide much information about their trailers or replacement parts, so I was not able to obtain the OEM grease cap size that Aspen uses. I strongly recommend measuring the hub bore with a precise measuring tool such as a dial caliper because hub bores can vary down to the thousandths of...
    view full answer...
    Image 1 for
  • How to Measure for Correct Bearing Buddy Size
    You will want to use a digital caliper to measure the inner diameter of the hub bore, where the grease cap sits. When choosing a Bearing Buddy, you will want to choose one that is a few thousandths of an inch larger than the hub bore opening. I have attached a link to all of our Bearing Buddy parts for you.
    view full answer...
  • Bearing Buddies for a Bearing with 1.625 Inner Diameter on a Motorcycle Trailer
    Bearing measurements have to be as precise as possible so if you are not using dial or digital calipers you will want to get some. But that is only if you cannot read the bearing number on the outer bearing. It should be stamped into the metal of the bearing. The diameter of the Bearing Buddies is its outer diameter where it fits into the end of the hub. It is actually slightly larger than the opening because you need a very tight fit. If your outer bearing number is # LM-11949 then you...
    view full answer...
  • How To Tell If Bearing Buddy Has Enough Grease
    The great thing about Bearing Buddy like part # BB1781 is that when you add grease to your system with the included fitting, it will move the spring-loaded piston outward and allow grease to seep around the edges to keep from damaging the seal. You can manually check the Bearing Buddy to be sure it has enough grease. All you need to do is press the edge of the piston. If you can move or rock the piston it has enough grease. I have attached a drawing of a Bearing Buddy you can check out...
    view full answer...
    Image 1 for
  • How to Pick Out Bearing Buddy for Trailer
    Most Bearing Buddies are going to stick out about an 1-1/4 to 2 inches from the hub when installed. But that also depends on which ones you need to go with. We do not carry a longer version. In order to pick out the correct bearing buddy you will need know the pilot hole of your hub. To do this, remove the wheel and tire and remove the grease cap from the center of the hub. Usually it is a metal cap that is just lightly hammered into place. Use a screwdriver to pry off the cap. Clean...
    view full answer...
  • Trailer Bearing Protector for a Hub with a 2-1/16 Inch Bore
    I can determine the correct bearing protector if you can provide me with the inner and outer bearing numbers stamped into the metal of the existing bearings on the trailer. Otherwise, I will need the most accurate measurement possible of the hub bore using dial calipers. We do not have a bearing protector that measures 2.0625 (2-1/16 inches) but normally they are slightly larger than the hub bore for a tight fit. You may need a 2.08 like # BB2080SS. Knowing the inner and outer bearing...
    view full answer...
  • Should Zerk Fittings on Trailer Hub Spindles be Used to Fill Hub with Grease
    With EZ lube spindles like what you have the best recommendation I can make is to actually not use the grease fitting at all as odd as that may sound. For best results it's best to pack the bearings and hub with grease by hand. The reason for this is that the grease fittings make it way too easy to over fill the hub which will either blow out the grease seal right then or will on the highway once it's warmed up a bit. Some people swear by putting in grease until you start to see it come...
    view full answer...
  • Is It Normal For Grease To Appear Under Bearing Buddy Bra/Covers?
    It is normal for grease to get inside the Bearing Buddy # BB1781 underneath the Bra # BB17B. As the grease heats up it can expand and will push out the Bearing Buddy so it will not damage the grease seal on your hub.
    view full answer...


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Info for this part was:

Employee Jackie C
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