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
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Trailer Bearings Races Seals Caps
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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. Lowest 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 800-298-1624 for expert service.
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  • Reviews (51)
  • Q & A (75)
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  • Why etrailer?

Bearing Buddy Trailer Bearings Races Seals Caps - BB1781

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

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 Reviews

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

Average Customer Rating:  4.9 out of 5 stars   (51 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.

- BB1781
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.



- BB1781
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.



- BB1781
by:

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



- BB1781
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.



- BB1781
by:

Worked perfectly Thanks



- BB1781
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.



- BB1781
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.


Comments
I used Bearing Buddies on my other boat trailer. I grease them every year with marine grease and nvere had a problem.
Ronald - 04/28/2019



- BB1781
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 .



- BB1781
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.



- BB1781
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.



- BB1781
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.



- BB1781
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...)



- BB1781
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!



- BB1781
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.



- BB1781
by:

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



- BB1781
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.



- BB1781
by:

Works great!!



- BB1781
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



- BB1781
by:

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



- BB1781
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.



- BB1781
by:

Products arrive much sooner than expected, same brand and quality as much costlier products I priced elsewhere. Free shipping was also appreciated.



- BB1781
by:

Great product I would order products from etrailer again



- BB1781
by:

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



- BB1781
by:

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



- BB1781
by:

Just received my order, great product, super fast shipping. Will be ordering again soon . Thanks for the great service. jerryw


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Ask the Experts about this Bearing Buddy Trailer Bearings Races Seals Caps

  • Bearing Buddy That Fits 2.7 Inch Hub Bore
    We do have a Bearing Buddy which fits a similar dimension as the 2-3/4" you referenced but I do recommend using a digital caliper and measuring your hub bore size to the thousandths of an inch to ensure you get the correct fit. For a 2-3/4" hub bore the closest fit we have are Bearing Buddies that fit a 2.717" hub bore, the Bearing Buddy Bearing Protectors - Model 2717SS - Stainless Steel # BB2717SS and the Bearing Buddy Bearing Protectors - Model 2717 - Chrome Plated # BB2717. I...
    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...
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  • Bearing Buddy Sizes Compatible for Hub 2 Inch Inner Diameter
    There are a couple of sizes close to your 2 inch diameter. If you measured with a digital caliper that goes to the thousandths like # 301-17068 then that will be much easier to determine the fit. We have the 2.047 inch # BB2047 in chrome plated or # BB2047SS in stainless steel. We also have the 2.080 inch # BB2080 in chrome of # BB2080SS in stainless steel. If it is smaller we have the 1.80 inch # BB1980A-SS in stainless steel. The fit should be snug to prevent leaks...
    view full answer...
  • 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...
  • 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...
  • Determining Bearing Buddy Size For Folding Trailer
    The best way to find the correct Bearing Buddy for your folding trailer is by checking the numbers on the outer bearing. I have attached a photo that shows where the numbers can typically be found. You can use those numbers to find the correct Bearing buddy that will work for you. Another way to find the correct Bearing Buddy is by measuring the hub bore. You will need a caliper to get an accurate measurement. After getting the measurement you can choose the Bearing Buddy that fits....
    view full answer...
    Image 1 for
  • Shorelander Wheel Hub Stud Recommendation
    Looks like you have a spline diameter of .56 inches and and threaded portion of 1/2 inch which is very popular. For that you'd want the part # K12WB2. I attached a picture that has a dimensional diagram for you to check out as well.
    view full answer...
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  • Can Bearing Buddy Fit on EZ Lube Spindle that has Zerk Fitting
    Yes you can use a Bearing Buddy on your current axle setup but you'll have to remove the zerk/grease fitting. What you have now is an EZ lube spindle which allows you to push grease through the middle of the spindle but you can install a Bearing Buddy over one of these spindles and it will still work. The trick to picking out the correct Bearing Buddy is to go with the one that fits the bore of the hub you have where the grease cap goes. The part # BB1781 fits hub bore of 1.781 inches. You'd...
    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...
    view full answer...
  • How to Pick Out Replacement Hubs for Mobile Home Axles
    You would have to contact your local DOT to find out if the tires/wheels/hubs you have are street legal in your area. Typically mobile home axles are set up for one time use so relying on them for any length of time might not be the best idea. You can also try contacting HADCO directly to see if they recommend your specific hub for highway use. You may find that you need to replace your hubs. In order to pick out the correct hub assembly for a trailer you are going to need know a few...
    view full answer...
    Image 1 for Image 2 for
  • Replacement Bearing Buddy Bras for Bearing Buddies with 2.13 Inch Outer Diameter
    Based on your measurement of 2.13 inches it sounds like you will need model 19B # BB19B. These have an outer diameter of approximately 2-1/8 inches. They will be easier to put on if you leave them out in the hot sun for a little while. It makes them more pliable. The next size up would be way too big and the next size down will be too small.
    view full answer...
  • Determining Which Diameter to Measure for Bearing Buddy
    You need to use the inner diameter of your hub bore to determine what size Bearing Buddy you need. If you measured the outside diameter and chose your Bearing Buddy on that, then it will not fit. If you measured the inner diameter, then as you said, it's supposed to be a tight fit. To get an accurate measurement of your hub bore, it's best to use a digital caliper like part # PTW80157 as this is accurate to 0.01 inches. Once you have measured, then choose your Bearing Buddy with that...
    view full answer...
  • What Bearing Buddy Is Closest to Fitting Hub Bore of 2.038 inch
    The closest Bearing Buddy we have to fit the hub bore you mentioned of 2.038 inches is the # BB2047 which fits a hub bore that measures 2.047 inches. This would appear to be too big to fit so it's hard to say for sure unless your caliper needs to be reset and is off by .01 inch.
    view full answer...
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  • What Bearing Buddy Bearing Protectors Fit Mobile Home Axle Hubs?
    To determine proper fit, you will need to measure your hubs with a digital caliper like # PTW80157. You will remove the current cap and measure the inside diameter of the hub. So you would use the smaller teeth that face outward on the back of the caliper to measure the width. Make sure the caliper is zeroed out before you start and you'll want the full two numbers after the decimal measuring in inches. Then find that number on the attached link and you will see your options.
    view full answer...
    Image 1 for
  • How to Measure Hub to Select Bearing Buddy Grease Cap
    I reviewed your photo and other photos of your H-F 90154 folding trailer and it appears to have grease caps far larger than 0.984-inches. It sounds like you were quoted a bearing dimension, not a grease cap dimension. What I suggest you do is remove one of the standard grease caps and measure the inside bore of the hub. You will need a caliper like # PTW80157 to measure to the nearest thousandth of an inch, e.g. 1.234-inches. You can then use the linked page to check for a Bearing Buddy...
    view full answer...
    Image 1 for
  • Bearing Buddy Recommendation for Hub Bore that is 2.328 inches
    That would mean that you have a Bearing Buddy designed for a 2.328 inch hub bore and you would need the part # BB2328 as a replacement.
    view full answer...
  • Recommended Bearing Buddy For Trailer Hub Assembly for 2,500-lb Axles # BB1781
    I was able to find the Bearing Buddy Bearing Protectors # BB1781. This product works with outer bearing model # LM11949 which is apart of the Trailer Hub Assembly for 2,500-lb Axles # T1721400042. The product provides your trailer wheel bearings with premium protection. They install in seconds and provide an easy, safe way to monitor and control the level of grease in your axle hub. It is made in the US and has a lifetime warranty.
    view full answer...
  • Can Bearing Buddy Be Installed on Trailer Hub If Spindle Has Grease Fitting
    You can use Bearing Buddies on a trailer with EZ lube spindles but you'll have to remove the zerk fitting so that the Bearing Buddy can fit over it. To pick out Bearing Buddies that fit your hub you'll need to measure the diameter of your hub bore where the cap installs and pick out a Bearing Buddy that matches this. For example, the part # BB1781 fits a hub bore that measures 1.781 inches.
    view full answer...
  • How To Determine What Bearing Buddy Bearing Protectors Will Work With Trailer Hub
    A tape measure is really not the best way to measure the hub bore on your trailer to find the right size Bearing Buddy. I recommend a digital caliper like part # PTW80157 to make sure you get the most accurate measurement. If you find your hub bore measure 1.781 inches then part # BB1781 would work great for your trailer. If your hub bore measures 1.980 inches, part # BB1980A would be a great fit.
    view full answer...
  • Which Bearing Buddy Is Compatible With 2013 Karavan Sea-Doo Trailer
    The bearing size is needed to confirm the fit of the bearing buddy needed. There are some Karavan trailers that use sealed bearings that cannot use Bearing Buddy grease protectors, but those specific bearings don't need them because they are maintenance free and sealed to keep water out. If you pull a hub, you will find the bearings and if you have standard tapered bearings, the number of the bearing will be printed on the hub face when you clean the grease off that portion. If you...
    view full answer...
  • How Does a Bearing Buddy Get Installed and Removed
    Installing Bearing Buddies like # BB1781 is fairly straight forward. I have included a link to a video and if you fast forward to about the 5:20 minute mark, our installer puts one on. He lines it up first and gives it a tap to get started. Then he places a block of wood over the end of the Bearing Buddy. The block of wood disperses the force of the hammer used to tap it into place. To remove a Bearing Buddy I would use a rubber mallet and gently tap it on the sides to unseat it.
    view full answer...
  • How To Tell What Size Bearing Buddy Is Needed for My Trailer Hubs
    The portion you need to measure is not the cap, but the the hub bore. Remove the grease caps and measure the diameter of the opening the caps occupy. This is the hub bore. You will need an accurate measuring devices like a set of dial calipers that is accurate to 3 decimal places. The Bearing Buddy pair you were looking at, part # BB1781, fits a 1.781 inch hub bore. The measurement you find should match exactly or very close to one of the measurements displayed on the Bearing Buddy page...
    view full answer...
  • Availability of Bearing Buddy Between Size 1.98 inches and 2.33 inches
    Like 2.047 inches? For that we have the # BB2047. Or for 2.24 inches we have the # BB2240. Your best option is to use a digital caliper like the part # PTW80157 to measure the bore of the hub to pick out the size that will fit it.
    view full answer...
  • Choosing Correct Bearing Buddy Size for 2001 Coleman Taos Tent Camper
    The particular bearing buddy you reviewed, part # BB1781, fits a hub bore of 1.781 inches and an outer bearing number LM-11949 Trailer and camper manufacturers may use different components in their products from one production run to another, so the only sure way to know what bearings are used in your Coleman Taos camper is to pull the wheel and hub and check the outer bearing number. Please refer to the photo provided. The next best method is to measure the hub bore using a digital...
    view full answer...
    Image 1 for
  • 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...
  • Need Bearing Buddy for 2-1/8 Inch Diameter Trailer Hub Bore
    The closest Bearing Buddy we have to a 2-1/8 measurement is going to be a slightly larger set that measures 2.240 inches, # BB2240 or # BB2240SS. In order to determine the correct Bearing Buddy for your trailer, the best way is to get the inner and outer bearing numbers on the bearings and/or the number on the outer cup (race). The Bearing Buddy part numbers listed above fit 1700 series outer bearings with race model 1729.
    view full answer...
  • Possible Bearing Buddy to Fit Hub Bore Near 1.75 inch
    The closest we have to that size is the Bearing Buddy # BB1781 which is for a hub bore of 1.781 inch. You might remeasure your hub bore to see if this would be the correct size or not.
    view full answer...
  • Can Trailer Dust Caps, Grease Caps, and Bearing Protectors Fall Off By Themselves
    Dust covers can indeed fall off on their own if they are not driven in correctly. If they are crooked then what happens is when the wheels are turning the cover will look like its wobbling (like a washing machine off balance) and gradually it being off center will cause it to work itself free. It is possible that the shop did not drive them in all the way. This seems to happen more with bearing protectors like # BB1781 that you have referenced because they can be a little more tricky...
    view full answer...

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