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 800-298-8924 for expert service.
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  • Reviews (49)
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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   (49 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:

Works great!! 802994



- 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. 802159



- 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. 776256



- BB1781
by:

Great product. Etrailer is always my first place to shop. 776060



- BB1781
by:

Everything arrived on time are all parts seem to be there so I think I'm in good shape 728924



- 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...) 691406



- BB1781
by:

Great service and good value for produc ts 603402



- BB1781
by:

Fit perfectly - works as advertised 586573



- BB1781
by:

Works great! 560883



- 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. 501232


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

54584

- BB1781
by:

Found just want I needed. I have use them a couple of times and I have always been pleased with the service. 484822



- BB1781
by:

Good product, price, and service! 476110



- BB1781
by:

Excellent product & great service... Would definitely buy from these guys again... 475071



- BB1781
by:

Went on in minutes. Works great! And great price! 474240



- 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. 432034



- 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. 422896



- BB1781
by:

Great service!! Katie was very helpful 409143



- 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 . 351381



- 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. 330390



- BB1781
by:

So far so good! 332912



- BB1781
by:

They work great! 329950



- BB1781
by:

Ordering on line was very easy, the parts arrived in my mailbox in just a few days, and I live in Alaska! Thanks 321608



- 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. 311091



- BB1781
by:

It was fast and efficient and the price was good. 304750



- 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. 294254


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

  • 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...
  • 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...
  • Replacement Bearings and Grease Seals for Karavan Ultra 2 Place Snowmobile Trailer
    Knowing that the trailer uses a # BB1781 Bearing Buddy helps me to identify the correct replacement bearings. We carry two hubs with that bolt pattern, one with a 5 lug on 4-1/2 inch bolt circle, the other much less likely possibility is a 4 lug hub that's typically used for agricultural applications. Your outer bearing is a # LM11949, outer race is # LM11910, and the inner bearing is likely # LM67048, which would be used with the # LM67010 race. You can confirm this by using a digital...
    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...
  • 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...
  • 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...
  • 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...
  • 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...
  • 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 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...
  • 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...
  • 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 Pick out Bearing Buddies
    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 the grease off and measure the opening. I have included a video demonstrating the Bearing Buddy. The Bearing Buddies # BB1980A-SS that you referenced are for hubs with a 1.980 inch hub bore.
    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...
  • 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...
  • 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...
  • 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...
  • Bearing Buddy Recommendation to Replace Trailer Hub Cap Measures 1-7/8 inch
    Just under 1-7/8 inch would put you very close to what the Bearing Buddy part # BB1781 is designed to fit as it fits hub bores that measure 1.781 inch. Ideally you'd verify this with a digital caliper like part # PTW80157.
    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...
  • What Size Bearing Buddy to Replace 2-7/16-Inch Grease Cap
    The best way to measure hub bore to determine which Bearing Buddy size you need is with a digital caliper. If you do not own one you may be able to borrow or rent one from a local auto parts store. Your other option is to obtain the outer bearing number from your trailer. You may be able to obtain the bearing number without having to pull it from the spindle; try wiping it clean of grease to see if the bearing number can be read. The size you quoted, 2-7/16 inches, corresponds to...
    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...
  • 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...
  • 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 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...
  • 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...
    view full answer...
  • Bearing Buddy for 1.98 and 2.13 Inch Trailer Hub Center Hole
    First I would get the hubs matched up because if they are different sizes that can lead to uneven wear of the tires and suspension components. Not to mention you would have to buy two sets of replacement parts all the time. But if the 2 hubs are on two different axles, that makes more sense. We have a lot of options for the 1.98 size. I have included a link to them on the right. For just a regular set use # BB1980A. The 2.13 is more difficult because it is in between sizes. If you...
    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...
  • How to Pick Out Bearing Buddy for a 5th Wheel Trailer
    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 the grease off and measure the opening with a mircometer. I have included a video demonstrating the Bearing Buddy. The Bearing Buddies # BB1980A-SS that you referenced are for hubs with a...
    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...

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Info for this part was:

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