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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: $31.40
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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. 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 (61)
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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   (61 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:

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:

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:

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:

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



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:

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:

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:

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:

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:

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:

Nice bearing Buddy set, perfect



by:

Worked perfectly Thanks

Charles

4/26/2022

Still working great would definitely recommend this product to everyone


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

  • Are There Longer/Deeper Bearing Buddy's for 1.78" Hubs
    The CE Smith Bearing Protectors part # CE16270 which are our longest/deepest bearing protectors are about 3/16" longer than the Bearing Buddy Bearing Protectors part # BB1781. The CE Smith are 2" and the Bearing Buddy's are 1-13/16". I have attached a review video I did on the CE Smith Bearing Protectors below.
    view full answer...
  • Where is Grease Fitting of Bearing Buddy for Trailer Hub
    If you check out the diagram I attached for Bearing Buddies like the # BB1781 you can see that the grease fitting is beneath the cap. Basically you attach your grease gun to the fitting and then pump in grease until you see the piston move slightly while turning the hub. It's easy to over fill hubs with these so be careful not to go too crazy with it.
    view full answer...
    Image 1 for
  • Replacement Bearing Buddy for Boat Trailer
    It sounds like you're looking for a replacement Bearing Buddy. The closest Bearing Buddy we carry to 1-3/4 inches is # BB1781 which fits a 1.781 hub bore. It works with outer bearing # LM11949
    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...
  • Which Bearing Buddy for a 1989 Karavan Jet Ski Trailer with 1.97 Inc Diameter Grease Cap
    If your existing grease cap is marked 1.97, you're probably needing Bearing Buddies for a 1.98 inch hub bore. The stainless steel model, part # BB1980A-SS would be ideal. Bearing Buddies and grease caps are meant to fit tightly, so be sure to verify the diameter of your hub bore. A digital caliper is best for this, as a ruler or tape measure usually isn't accurate enough. Bearing Buddies are only compatible with standard spindles, not EZ-Lube Spindles with the grease zerk.
    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...
  • 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...
  • How To Determine The Correct Bearing Buddy Dust Cover For A 2021 Shoreland'r Boat Trailer
    To figure out what Bearing Buddy you need for your 2021 Shoreland'r boat trailer you'll need to measure the diameter of your hub's bore hole (pictured below). Once you have that measure we can find the correct fitting Bearing Buddy. For example, the Bearing Buddy Bearing Protectors # BB1781 you were looking at is a fit for a 1.781" hub bore hole diameter.
    view full answer...
    Image 1 for
  • Bearing Buddy grease Caps For Trailer With Hub Bore that Measures 2-1/2 Inches Diameter
    The Buddy Bearing Bra, part # 23B you mentioned you have can fit many of the Bearing Buddy grease caps. The best way to find a Bearing Buddy that will fit your hub is to use a digital caliper like part # PTW80157 and take an accurate measurement. We have a couple Bearing Buddys that are close to the size you said your hub bore is. The first is part # BB2441SS. These fit a hub bore that measures 2.44 inches. The next size up is part # BB2562SS. This will fit in a hub bore that measures...
    view full answer...
  • Recommended Trailer to Replace a 1990 Lil' Rider Boat Trailer
    It looks like the Lil Rider trailer was made by Load Rite. They don't make that trailer anymore but they may have something like it. I could not find any pictures or schematics for your trailer so I am not sure what size or type it is. We do have CE Smith boat trailer # CE48810. It is for boats and personal water craft that are up to 12 feet long. It has an 800 pound capacity. I have linked a video review of this trailer for you.
    view full answer...
  • 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...
  • How To Determine If Trailer Hub Bearing Is Full Of Grease
    If you have EZ lube spindles with the grease fitting on the end, as seen in the video you are referring to for Replacement Trailer Hub Bearing # LM11949, you will just fill until the new grease starts to come out of the spindle. If you don't have spindles with the grease fitting and you are referring to the grease fitting on a Bearing Buddy like Bearing Buddy Bearing Protectors # BB1781, then there is an over-fill protective spring that allows grease to overflow out of the cap when it's...
    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...
    Image 1 for
  • How to Determine Which Size Bearing Buddy Protector is Needed on a 1989 Heritage Trailer
    To determine the correct size Bearing Buddy Protector you need on your 1989 Heritage boat trailer you'll need to remove the current caps and measure the diameter of the hub bore that they cover. You'll need to be exact as possible down to the 1000th of an inch. For example, the Bearing Buddy Protector # BB1781 fits a 1.781 inch hub bore.
    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...
  • 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...
  • 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...
  • How To Know When Your Done Filling Item # BB1781 With Grease
    If you start seeing grease coming back out of the Bearing Buddy Item # BB1781 then you should be good to go with filling it. It is not necessary to fill every time you pull out of the water. It would not hurt to check them every couple months though. Marine grease typically holds up well against water.
    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...
  • 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...
  • 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 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...
    Image 1 for Image 2 for
  • 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 2.437...
    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 # LM11949. 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...
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Info for this part was:

Employee Jackie C
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Mike L
Employee Patrick B
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Employee Jeffrey L
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Employee Tyler C
Written by:
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Employee Cole B
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Video Edited:
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