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  1. Trailer Bearings Races Seals Caps
  2. Bearing Buddy
  3. Caps
  4. Bearing Protector Grease Cap
  5. 1.938 Inch
Bearing Buddy Bearing Protectors - Model 1938 - Chrome Plated (Pair)

Bearing Buddy Bearing Protectors - Model 1938 - Chrome Plated (Pair)

Item # BB1938
Our Price: $22.13
You Save: 27%
Trailer Bearings Races Seals Caps
Shipping Weight: 0.95 lbs
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BB1938 - Bearing Protector Grease Cap Bearing Buddy Caps
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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 1938 - Chrome Plated (Pair) part number BB1938 can be ordered online at 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 - BB1938

  • Caps
  • Bearing Protector Grease Cap
  • 1.938 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.


  • 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


  • Fits 1.938" hub bore
    • Works with outer bearing model 09067
    • Works with outer bearing cup (race) models 09194, 09195 and 09196
  • 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.

42300 Bearing Buddy Model 1938 - Chrome Plated (Pair)

Customer Satisfaction Score:

Customer Reviews

Bearing Buddy Bearing Protectors - Model 1938 - Chrome Plated (Pair) - BB1938

Average Customer Rating:  4.7 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.


Your Bearing Buddy Protectors looked very good. However, they did not fit on our trailer. I did return them.


Installed these, they are working perfectly. Happy to have found them, living up here in Northern Ontario, it was something no local distributor had in stock.


I have used bearing buddies before haven’t put the on the hub yet but I don’t see any problems


I visited several auto parts stores to find the right sized dust hubs for my utility trailer. I had measured the diameter of the one cap I did have. No one had the correct size. I did try a couple of close caps, BUT, they didn't want to fit, even if I bent the lip in somewhat. I was frustrated!
One of the parts stores suggested a local trailer shop. I tried and they tried, BUT AGAIN, no cigar. They did, however, measure the size via micrometer, at 1.94" So out of desperation I tried the e-trailer site.
I came across some customer comments when looking at the closest size to mine that E-Trailer offered, 1.938." Now that seemed as close to 1.94" I could get.
I decided on "Bearing Buddies at that size, since others said that dealing with e-trailer was a great experience. They came within two days and the Bearing Buddy's slid on without a whimper, nice and tight. And, they also came with the protective bra's.
Now that e-trailer turned out to be my salvation and they got my product to me in a very short time, e-trailer will now be my "GO-TO" guys. I have three Utility Trailers, all for different purposes and I now have a place to trust when needed. No need to go anywhere else. The price was better than fair and they did not try making extra profit by inflating the freight cost. I know this because I ship a lot, have my own business and have my own UPS, FEDEX and USPS accounts and I know what shipping costs are.
E-Trailer are straight shooters! Thanks guys!!

Matt S.




They fitted perfectly


Haven't used yet,


I refurbished an old home built boat trailer and was fortunate enough to find Bearing Buddies that fit my hubs. I have only towed my trailer one time but I know how well Bearing Buddies work and I am extremely confident they will hold up longer than the trailer will.


It was easy to replace old caps with Bearing Buddys and etrailer was there to help me get the right size, my trailer had odd size caps. Its a peace of mind one or two pumps of grease and your on your way, outstanding product.


Hard to find any fault with a brand name product such as Bearing Buddy. These went right on as advertised. Pretty slick having the protector bras and greasers all in one set, especially for the old obsolete boat trailer hubs I am dealing with!

Great follow-up and support from the supplier as well. Few suppliers seem to remember customer service as a proactive policy.


I used these on my golf cart and they fit and have worked great. good company to do business with

Daniel E.




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...)


I have a homemade trailer for a jet ski. The hubs and spindles are not common. But Bearing Buddy makes it easy to identify the exact part needed based on the outer bearing race/cone. They arrived super fast and they fit perfectly. I installed them in under 10 minutes. My old homemade trailer will now last longer than the jet ski. Bearing Buddy's are a must have item for any boat trailer.


I have used Bearing Buddies in the past and wanted to install them on my new trailer. etrailer quickly shipped my new Bearing Buddies. Unfortunately Bearing Buddies had labeled their product wrong and they were to large. etrailer quickly resolved the issue. Great Service!!!!


Couldn't find a plain old bearing cap anywhere - odd size- so I got a bearing buddy. Wheel looks good and I can pretty much forget ever having to pack bearings again.


They worked great!


Worked perfectly for servicing the hubs on my ranger trailer


The bearing buddys have worked flawlessly. It was nice to get the size I needed because my hubs were from an older trailer. Thanks.


Exactly what I ordered. Perfect fit on my utility trailer. Had heard about Bearing Buddies before, and always wanted to try them. So far, so good. Will update review after a few months use.


As always, e-trailer has the right parts and good prices.


Product arrived much quicker than I expected, in fact, 2 days after ordering. Have used bearing buddies for several years. I had a very old trailer that I was putting them on and the size of the hub was smaller than the normal 1980. This was the only place that I could find this size in a quick search. I did have to ease the hub size slightly, but they fit well now.


They look well built but I got the wrong size. The diameter of the current caps on the trailer are 1-15/16".. The 1938 is just about 1-7/8". I need the next larger size.

J S.


so did the next size work out? My hub is also 1 1516.

Patrick B.


He returned them, but did not end up ordering the next size.


I was able to replace a dammaged dust cap with a greasable bearing buddy on antique rock picker. I looked locally first, and was unable to locate BB's in this size . I was able to order them here and they arrived quickly, installed easily, and work great. Thanks again, J.Miller


Fantastic service -=- I measured the bearings wrong three times -- ordered them. When they would not fit they worked with me to replace them that day.


Looks like the dust covers are
too small, but I need to get my trailer back from my brothers shed to be sure. Will let you know Monday around noon or so. Thanks for the follow up. It is greatly appreciated.



Great product and super fast shipping. Awesome seller.

Show More Reviews

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

  • Bearing Buddy for Hub with 1.928 Hub Bore & 09074 Outer Bearing
    The best option for you would be Bearing Buddy # BB1938. Your hub bore is 1.928 and this Bearing Buddy is for 1.938 hub bores. It will be a little snug, but that is not a bad thing when it comes to bearing protectors. This same Bearing Buddy is offered in a stainless steel version # BB1938SS.
    view full answer...
  • Correct Buddy Bearing Protectors for 1-15/16 Inch Hub Bore
    The correct set of Bearing Buddy Bearing Protectors for a 1-15/16" hub bore is part # BB1938 for chrome or part # BB1938SS for stainless steel.
    view full answer...
  • Recommended Grease Cap for Hubs With 1.931 Inch Diameter
    The Bearing Buddy Bearing Protectors - Model 1938 - Chrome Plated (Pair) # BB1938 or # BB1938SS in stainless steel are the closest fit to your hub bore with a diameter of 1.938 inches. These are drive in bearing protectors that will keep the concrete dust out and keep your system well maintained. They are drive in caps that are within 7/1000ths of an inch so they should work seeing as even a digital caliper can have that slim margin of error.
    view full answer...
  • Bearing Buddy Recommendation for Dust Cap that Measures 1-15/16 Inch
    1-15/16 inches in decimal form is 1.9375 inches which means for a Bearing Buddy you would want the # BB1938SS for stainless steel or part # BB1938 for chrome.
    view full answer...
  • How to Pick Out Bearing Buddy for 2005 Arctic Fox 29V
    I don't have a way to look up what Bearing Buddy your 2005 Arctic Fox 29V uses. 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...
    view full answer...
  • Bearing Buddy for a SnowBear Trailer with 1-15/16 inch Hub
    15/16 is .937 inches so your measurement comes out to 1.937 inches which is slightly smaller than the 1.938 inch diameter of the Bearing Buddy Model # BB1938. I believe this will be the correct part for your hub since there is not another bearing protector close to the dimension you have mentioned. You should measure more precisely to determine the correct size to order. If you have access to a dial caliper it would help. I contacted SnowBear and they have not gotten back to me so I cannot...
    view full answer...
  • Bearing Buddy Recommendation for Trailer Hub with 1-15/16 inch Hub Bore
    For your dust cap that measures 1-15/16 inches (1.937 inches), the Bearing Buddy part # BB1938 that you referenced would be the correct part confirmed to fit.
    view full answer...
  • Will Bearing Buddy BB1938 Fit Spindle Nut that Sticks Out 1-1/8 inch
    Your spindle nut extending beyond the hub about 1-1/8 inch is pretty normal. The depth of the Bearing Buddy part # BB1938 easily accommodate that and based on your other dimensions would fit in that regard as well.
    view full answer...
  • Bearing Buddy for 1.938 Hub Bore
    We offer them. Your hub probably uses a 09067 outer bearing with a 1.938 hub bore. If that's the case, we offer a Bearing Buddy model that will fit. For a chrome plated model, use # BB1938 or for a stainless finish, use # BB1938SS
    view full answer...
  • Recommended Bearing Buddy Grease Caps for 1-15/16 Inch Diameter Trailer Hub
    If your hub measures 1.9375 inches like you referenced then # BB1938 in chrome or # BB1938SS in stainless steel will fit. These are often paired with the Spindle Grease Seal Set for 15123 Inner Bearing and 1.980T or 1.938 Bearing Buddy # BB60009 to give you a strong grease seal.
    view full answer...
  • What is the Correct Bearing Buddy for Use on 2005 Airstream Classic
    You can determine what type and size of Bearing Buddy to use on your Airstream trailer by taking a look at the current hubs. You will need to know if the hub bore is threaded or not and you'll also need to take a precise measurement of the hub bore diameter using a dial or digital caliper. You'll need to measure to the nearest thousandth of an inch, or three decimal places like 1.781-inches. Once you know your type and size of hub bore you can use the linked page to select those features...
    view full answer...
  • Correct Bearing Buddy Bearing Protectors for 1.940" Hub Bore
    Yes, the Bearing Buddy Bearing Protectors part # BB1938 are designed for a 1.938" hub bore so if you measured 1.940" this is what you'll want to use.
    view full answer...
  • Bearing Buddy Recommendation for Fitting Hub Bore that Measures 1-15/16 inch in Diameter
    The correct Bearing Buddy for fitting a hub bore that measures 1-15/16 inches is the Bearing Buddy part # BB1938SS which is a fit for 1.938 inch bores. Which 1-15/16 inch in decimal form is 1.9375 inch.
    view full answer...
  • Outer Diameter Measurement of Bearing Buddy Model 1938SS
    According to Bearing Buddy, there is actually a slight variation in the outer diameter so there won't be an exact measurement. The variation will be somewhere between a hundredth or thousandth of an inch. Either way, since the # BB1938SS is designed to fit a 1.938" hub bore you will be able to use these with your hub. These are drive in caps that are supposed to be snug so they won't fall out, and the .003" difference is acceptable.
    view full answer...
  • Do You have Grease Caps for a 1.935 Bore Diameter Hub
    If there is any corrosion built up on the hub, it could be built up corrosion built up on the hub bore making the hole read smaller. Grease caps do not have to be very deep. They only have to go in far enough to fit snug and tight inside the hub bore. Many grease caps have a flange length of just a little over a 1/4 inch, and most are well under a 1/2 inch. If their is a bit of corrosion, try lightly scrubbing with some steel wool. After cleaning it up, a 1.943 cap like part # F001524...
    view full answer...
  • Recommended Bearing Buddy For 1.935 Trailer Hub
    I would be happy to make a recommendation for you. Based on the measurement you provided you will need the Bearing Buddy Bearing Protectors Chrome Plated # BB1938 or Stainless Steel # BB1938SS which is for a 1.938" hub bore. If you do not already have a grease gun to use with the Bearing Buddy you may be interested in the # PTW54290. I included videos for each of the products mentioned for you to take a look at.
    view full answer...
  • Which Bearing Buddy Protectors for Trailer With an Inner Hub Diameter of 46 mm?
    Your inner hub diameter is reported as 46mm which is equal to 1.811 inches. Normally we would go up one size to Bearing Buddy # BB1938. However, Buddy Bearing # BB1810 is nearly a perfect fit. If you had accidentally mis-measuerd by even 2/1000's then 1810 is a perfect fit. Double check your measurement then pick the one that just fits or is next size up.
    view full answer...
  • What Size Bearing Buddy Is Needed For A Hub Bore Size Of 1.940 Inches On A 1951 Utility Trailer
    I have a Bearing Buddy Bearing Protector, # BB1938, which fits a 1.938 inch hub bore. This would be the closet to your measurement of 1.940 inches and should work in your hub. The next closest size I would have is the Bearing Buddy Bearing Protector, # BB1968, it fits a 1.968 inch hub bore. The Bearing Buddy Bearing Protector, # BB2047, you have referenced fits a 2.047 hub bore, which would be too big for your trailer.
    view full answer...
  • Do Bearing Buddy Bearing Protectors Come with the Rubber Covers
    Yes indeed. The Bearing Buddies, such as # BB1938, do come with the little bras/rubber covers. I have included a picture showing all for parts for you. Should you ever need some replacements in the future we have those, too; # BB19B.
    view full answer...
    Image 1 for
  • Bearing Buddy Bearing Protectors For a 1.96" Hub Inside Diameter
    We have the Bearing Buddy Bearing Protectors # BB1968SS that fit a hub bore of 1.968 which is likely the size you have. The measurement may be slightly off based on the outside temperature as steel can expand and contract based on temperature.
    view full answer...
  • Rubber Covers for Model 1980 Bearing Buddy
    Yes, the # BB19B would work with your 1980 model of Bearing Buddy protectors. These covers will keep grease where it belongs, and off the tires and wheels of your trailer. These are sold in packages of 2, so please order accordingly for how many axles your trailer has. I have included a link to the part listed above for your reference.
    view full answer...
  • Bearing Buddy Bearing Protector For a Hub With Grease Cap 1.90"
    The Bearing Buddy Bearing Protectors # BB1938SS are the closet we have to your 1.90" measurement. These fit a hub bore of 1.938". If you can send me some additional information on your hub/spindle including bearing sizes and grease seal dimensions I can see if we have a replacement hub that will come with a grease zerk or allow you to have a different size grease cap.
    view full answer...
  • How To Find The Correct Bearing Buddy For Your Trailer
    When choosing the correct bearing buddy for your trailer you will first need to know the pilot hole of your hub. First you will need to remove the wheel and tire and then remove the grease cap from the center of the hub. Next you would need to clean off the grease and measure the opening using a Digital Caliper # PTW80157 which will give you the exact measurement. The Bearing Buddy # BB1938 you linked has a pilot hole diameter of 1.938 inches. I attached a review video link below.
    view full answer...
    Image 1 for
  • Determining Wheel Bearings and Bearing Buddies For Snow Bear Utility Trailer 6000
    Since trailer manufacturers do not make bearing information readily available to the public you would need either the bearing numbers from the bearings themselves or measure the spindle to know which bearings would fit. If you pull the hubs off and remove the inner and outer bearing there should be a number stamped into the side. You would also want to do this with the seal. If you don't have the bearings, you would want to measure the spindle with a pair of digital calipers like part...
    view full answer...
    Image 1 for

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Info for this part was:

Employee Mike L
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