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Bearing Kit for 1" BT8 Spindle, L44643 Inner/Outer Bearings, 34823 Seal

Bearing Kit for 1" BT8 Spindle, L44643 Inner/Outer Bearings, 34823 Seal

Item # BK1-100
Our Price: $16.83
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Trailer Bearings Races Seals Caps
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Shipping Weight: 0.64 lbs
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Bearing Kit for 1" BT8 Spindle, L44643 Inner/Outer Bearings, 34823 Seal Standard Bearings,Bearing Kits BK1-100
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Great Prices for the best trailer bearings races seals caps from etrailer. Bearing Kit for 1" BT8 Spindle, L44643 Inner/Outer Bearings, 34823 Seal part number BK1-100 can be ordered online at or call 1-800-496-5010 for expert service.
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etrailer Trailer Bearings Races Seals Caps - BK1-100

  • Bearings
  • Standard Bearings
  • Bearing Kits
  • 2000 lbs Axle
  • 2500 lbs Axle
  • Bearing L44643
  • etrailer
  • Race L44610


  • Kit includes: 1 inner bearing, 1 outer bearing, 1 grease seal, 1 cotter pin and 2 races
    • L44610 Race fits L44643 and L44649
  • Double lip grease seal
    • Provides an upgrade compared to a single lip seal
    • Reinforced spring behind the lip does a better job of retaining the grease inside the hub and excluding water and road grime
Outer Bearing
Inner Bearing
Seal I.D.

BK1-100 Bearing Kit for 1" BT8 Spindle, L44643 Inner/Outer Bearings, 34823 Seal

Video of Bearing Kit for 1" BT8 Spindle, L44643 Inner/Outer Bearings, 34823 Seal

Videos are provided as a guide only. Refer to manufacturer installation instructions and specs for complete information.

Video Transcript for Trailer Bearings Races Seals and Caps Rebuild

Speaker 1: Today we're going to take you through the rebuild process on a couple of hubs. We've got an idler hub, and here we've got a hub and drum assembly. Works with electric rigs, but this can also work for just standard discs, if you've got a disc brake style setup.Basically what we're going to show you is how to get all of the bearings out. How to remove the seal. How to remove the race's if they're damaged, then get them replaced in the proper manner. We'll show you how to use an easy loop hub, which we have here.The first thing we are going to need to do is, get the grease cap off the end.

It can have either a rubber plug in it like this one does, or it can be a solid metal cap.These are pressed fit in there, basically by tapping on them on the back side. To remove them, a deadbolt hammer is typically what we're going to use. We're just going to start tapping as we go around. You'll see a little separation start right here, and slowly it'll work it's way off.Now the next step's going to vary a little bit depending on your axle setup. Do you see this is going to have a keeper that goes around the nut.

And that prevents that from being backed off, or removed. A lot of times you'll have a castle nut, which will have just little tabs that stick off, and there will be a cotter pin that passes through it. Just depending on your application, you need to get the keeper for the nut off. This style we just kind of pry out. A cotter pin you would just remove of course.Once we have that off ...

We'll start to take off the nut here, and the washer that's in behind it. Now yours should look a whole lot more dirty than this. There should be a lot of grease packed in, and through the hub, this one's brand new. We thought it'd be nice to show you the components before the grease was on .. Of our washer that comes off.And then here we're going to have our outer bearing.

Continue to pull that. We're gonig to have our inner bearing here. That sits in the backside of the hub. And we didn't put it in yet, we will show you how to put it in. But a seal would typically be covering the backside here. We'll show you how to use a seal removal tool, or another tool. To get that pried up and out. To get an access to that inner bearing.Now for a drum style like this, that process for disassembly is going to be just the same. One thing to keep in mind if you're using a disc brake setup. You'll have to remove the caliper before the disc is going to come off.Now once we have the spindle exposed, as we said this is going to be really greasy. We want to get all the grease removed, and the first thing we'll do is inspect it. We want to make sure that it looks just like what we have here. Everything's nice and smooth. We don't see any kind of discoloration, or any marring on the metal. Indicating that our bearing's got hot.If you do have any of those symptoms, at this point it's time to replace those bearings. You don't want to repack them. Get new bearings, and put in there. You might have a bearing that's come apart in here. Another surface to ensure is in good condition, is where your seal is going to go. That helps seal all the grease inside of our hub. With a damaged or broken seal, that grease is going to seep out. Either out of the hub, or in this case into our brake assembly.Now if your axle has brakes, we're also going to check the disc. Make sure it doesn't have any issues, or your hub. And this is going to be a hub and drum assembly. The brakes are going to ride on this machine surface. You're going to check that for signs of excessive heat, discoloration, or cracking. And this is our magnet surface. We'll check that surface for the same issues.Now inside the hub regardless if it's a disc brake, it's a drum brake like this. Or just a standard idler style hub. You're going to have an outer race. Would be right here, it's a small tapered piece of metal your bearing sits in, and rotates on. That's basically the outer portion of the bearing.You have the same thing here on the backside. This is called the inner race. Now if those show any signs of wear, overheating, or cracking. Those are also something we'll need to replace, which we'll show you how to do in just a minute.Now, with your brake assembly exposed, if you do have electric brakes like we have here. It's a good idea to check all the components for wear, cracking, maybe missing pieces. Check your pad thickness to make sure those are in good shape. Basically if you have a non working brake assembly and you put everything back together, you're just going to have to take it apart and do it all over again to get back to the brake assembly. This gives you a really good option to be able to change them out.And most applications are going to use a four, or maybe a five bolt flange to hold them in place. And you'll just remove the lock nuts, or sometimes you'll have a hex nut with a lock washer. You want to remove those, and then simply slide your assembly off after you cut the wiring.The friction material itself should also be checked for any kinds of cracking, or overheating. If you have any grease inside the system at all, it's likely it's gotten on those pads. It's a good idea to get those changed. Now as far as the removal of the races go, it's going to be just the same whether we're using an idler style hub like we have here. A drum brake like we have here. You can basically see where the idler is, here in the middle of the hub. It's going to go all the way around there, and we just have this extra material here to provide our braking surface.Now if you're doing a disc brake style job again, it's going to be just the same here with the races living inside of the actual hub portion. You'll just have the discs there for the brakes to make contact. We're going to use this little bit smaller one, it's a little bit easier to manage to show you how to get these out. We've talked about where the races are. The outer here, the inner being closer to the inside, but on the backside of the race there's a little lip. That lip's meant to stick out just a little bit further than the hub, and provide us an area to put our tool on, and help to drive that out.If you look all the way through there on that inner race, you'll see that little lip that sticks out just from the hub slightly, and it gives us enough area to use our tool on. Now generally to remove these you're going to use a punch, similar to this. Some guys will use a screwdriver. Or a piece of pipe. If you have a piece of pipe that's small enough to fit inside of that diameter, you can take that down through and allow it to rest on that lip.Use our punch, and then just need a hammer. And we'll start working that out. We're going to tap all the way around. Kind of equally, and evenly apply the force to get it to come on out of the bottom for us.You can see now as it starts to come out there's going to be a little gap created between the hub and the race. And we can just keep going, bringing it on out. Then you can inspect the inside of the hub surface there. Make sure no damage or anything has occurred, and repeat that same process for the outer race if you plan on removing and replacing that one.Now in the outer flat edge, you can see we're going to have our tapered edge on this side. If we roll our race over to the flat side, typically there's going to be a manufacturers part number on there. That will help you identify which race it is, that you need to go back in your system. If those are rubbed off, worn off, if you can't read them. You can measure the outside, to outside diameter of the race here. It's a good idea to use a micrometer to get it exact.Now here's your basic micrometer. And again, the outside of the race is what we're going to need to measure. You want to go . I set the thickest point there. Looks like this one's going to be about 1.98. That's going to be the measurement you'll want to supply.Now while we've got this out, let's also look at the proper way to measure our bearing. Instead of the outside for the bearing, we need to measure the inside diameter. That's going to be pretty simple. Let's pull that out, find the largest measurement we can. Which here, looks like it's going to be 1.03. With that information, we'll be able to get the correct bearing, and the correct race, so they'll fit together properly and make a full bearing kit for us.Now here's the race, we're going to show you how to get this put back in. Basically just going to press fit inside of our hubs. We need to get it down on there. Kind of like that. And you'll have a couple options. A lot of times you're going to see do it yourself or at homer, just going to use a wooden block. Just place it on there. That's going to get you started, but at that point you'll struggle in getting it to go all the way down into it's seat.Now to take care of that problem, there are several seal drivers that are available. Seal and race drivers that are available out there on the market. It's designed to fit down inside of our race, inside of our hub and get it down there where it needs to go. This is part number ptw83020, has several different sizes, even if you have multiple trailers it's going to do the job.Now the side with the angle on it, is designed to fit down inside of our race. If we use the other side, that's going to be for driving your seal into place. Just want to hold it, and take it on in with your hammer. You'll see, you just want to insure that our race is all the way up against that line on the hub where it's supposed to mate to.Now when it comes time to pack your bearings you're going to have several different ways of doing this. You can just use your hand, is the traditional method. That's going to be the method probably reserved for the very occasional trailer work kind of situation. If you do it once or twice a year, probably get away with it that way.Next you would go to a, kind of a sandwich funnel style almost. If you look inside of there, you can see the bearing. It's located between the two pieces. Just use a grease gun. Start filling that with grease, and that's going to fill our bearing for us. And the third, with this one you're just going to place your bearing down and in. It should be pretty close to center. And then we've got our cone her that's going to go down and secure that.Now I think this style, wastes a little bit more grease than what this style will. This has a dust cap. You can see, you can keep your grease in there, put your dust cap on there and save it for later use. This will be if your going to do it every couple years. And this particular style would be if you're a more regular user.Let's start by showing you how to use a bearing packer. Similar to this. Again, we've just got our grease inaudible 00:11:07 here on the top. And then just slowly start to fill it. Now I like this style quite a bit. I think even regular users might enjoy it, because you can get a really quick visual look at that bearing. You're not going to have to overdo it, or have to much grease.You can kind of see in there now, we're starting to get grease to come out of it. Couple more pumps, we'll be good. You can see we've got grease coming out all the way around. Where all of our bearings are. Got a little bit of excess there. Just take that around the outside of it. And then we should be able to lift it off. And now you can see what we we're talking about. Just a little bit of excess there, that you're just going to wind up wasting.Now we'll take our bearing, we're going to place it right down in our race. And then we'll cap off the back with our seal. Right now our seal's going to fit in just like our race did. It's going to have a little bit of a pressure fit to it. Now very often in this situation, I see people using the four by four method. Kind of here, just placing that on and tapping it. As an option though, if you do have one of these. You can see that's designed to fit right on the top of the seal. And help drive it in.The biggest thing here is, just going to be getting it driven in squarely. You can see, this side's in a little bit further than this side. I'm going to start this side first. Now since we didn't have the opportunity to show you before, we're going to take a look at pulling a seal. Now this is a seal puller, we carry this on our website part number ptw1219. This is meant to hook underneath the seal. And then you kind of pull up on it, and just like our race you'll have to work all the way around that edge. Just bringing it out a little at a time.If you don't have that available. Another option would be a screwdriver. You just kind of get that under the seal, and turn it. And see, that'll allow you to also pop that out. We've taken care of our race. Our inner bearing. Our seal. The last component, before we put our hub back in place is going to be our outer bearing. Now with this bearing, I'll show you the hand packing method.This is definitely . Slightly dirtier method than the bearing packer. When we get grease on our hand we want to look at the larger side of the bearing. This is the smaller side. We have a larger side In between the inside and outside there's a gap. We can see our rollers in there. We want to grab that, and use that gap and shove grease inside of it. Now this is going to take a little bit, you want to work in the same spot until you get the grease pushed all the way through. We can see on the top there we've got a little bit starting to come through.And once we push it in the bottom, and you see it start coming out the of the top in those little drips, it's going to indicate that, that section's fully packed. Just need to work all the way around their outside edge now and do the same thing. Alright, once that's all the way around . The bearing will be ready for use.Now one more thing I like to do. We can see our inner bearing there, and our outer bearing. Well between the two, got a pretty big gap in there. If you'll take a . Pretty good amount of grease. We're just going to go all the way around. See how we can go all the way around the inside and just line that really well. The more grease we have in here, the less chance we have of any moisture getting in there, which can cause corrosion, rust, pitting. Pretty much things we do not like when it comes to bearings, races, and hubs.Put plenty of grease in there. And then this one does have the easy lube spindle, that'll even fill it in more. Now we can get our assembly slid on. I like to keep my thumbs on that outer bearing, just to prevent it from . inaudible 00:15:28 pushed off there. Now we can put on the original hardware that we removed, in taking off our hub the first time. In our case, we had our washer and our nut.Now most commonly you'll see pliers similar to this being used. We basically want to get that tightened down. Once it's fully tightened down you'll feel some resistance in the hub. We back it off just slightly. That'll give us a little bit more freedom of motion there. Something you don't want however . Is any movement in, or out on your hub. You want to be sure that everything is compressed, and you don't have what's called end play. Which would be the play in and out.Once we've got that set, then you'll put on whatever tight keeper yours came with. Get that put back in place. Now with an easy lube style hub, you're going to place your grease gun on the end, and then you can just fill the remainder of that hub up.Now for your typical applications, you're either going to have a solid cap, or a cap that'll have a rubber plug in it. A solid cap's going to be for an axle without the grease inaudible 00:16:51 here on the end. Goes on there. Just knock it on with your rubber mallet. Same with the one with the plug. Just gives you a removable area there, be able to cap that off.We'll show you how to put that on. Now as alternatives as well, a lot of times on boat trailers and marine kind of situations. You'll see a bearing buddy. This is going to apply a little bit of pressure on the grease, you'll fill it up. This kind of comes out just a little bit. That applies constant pressure on the grease to make sure we don't have any air, or anything like that. Then there is also an oil bath hub available. Now this is going to be for use with seals that are going to be designed specifically for oil bath use. You'll have to change that seal.We're using a double lip seal. There are also single lip seals available. Of course a double lip seal is going to give you just a little additional security. Keep that in mind when you order. But let's get this knocked on there now so you can see how that works. We just want to take the cap, we're going to center it. This is going to be very similar to what we did with the seal. And then just gently start tapping it around the outside. And it'll seep down on there for you.It's really going to be the same thing that you'll do with any of the end caps. Now with this side done, it's a good idea to take care of all the other hubs. Get them all on the same maintenance schedule. And as long as you'll periodically check the grease, take your trailer out for a trip occasionally. Just to keep everything lubricated. It should extend the life of these parts, and give us years of good service.

Customer Satisfaction Score:

Customer Reviews

Bearing Kit for 1" BT8 Spindle, L44643 Inner/Outer Bearings, 34823 Seal - BK1-100

Average Customer Rating:  4.8 out of 5 stars   (518 Customer Reviews)


The bearing kit seemed to work out just fine. I put everything together today. The only thing I wondered about was the relatively small cotter pins, but they still worked all right. Before I placed the order, I was having difficulty identifying the seals. I could not find a match anywhere for numbers on the old ones. After calipering everything and talking to you by phone, your advice for the 34823 seal was correct. Thanks for your technical help and providing a good quality product.

All is well. I appreciate etrailers attention to customer service with great tech support and follow up as well as competitive pricing and quality. Keep doing what you are doing and I will keep spreading the word.
Turtle - 11/27/2021


Last week I started thinking about my kayak trailer and what repairs needed to be completed before the spring and summer usage.

In 2011 I converted a small sailboat trailer to a two place kayak trailer. I ordered bearing kits wheels and tires at that time from e trailer. Every year I pull the wheels and grease the bearings and I install new grease seals. Last year when I was doing my maintenance I found that the bearing races were lightly rusted and pitted because the trailer was buried under a large snowfall. The bearings were fine and I cleaned up the races with steel wool. I decided I would replace everything come winter. I ordered bearing caps to replace my old dented caps hoping that this will keep the bearings dryer. I made a place in the garage to keep the trailer from the weather.

I placed a call to you guys and was greeted by a very friendly voice on the other end of the phone. Brandon was able to find my past order saving me time and effort. (My filing system could be better.) He was able to e-mail me copies of my previous orders and shortly there after I placed my order on line for new bearing kits and a few extra seals and well you know the rest. I tell everyone about the excellent service I get from

keep up the good work.

Its very nice that you would follow up. The products I purchased performed perfectly. I am only able to purchase the double lip seals through you. I cannot find them localy. Thank you for selling a superior product.
Bruce - 02/26/2018


I found this kit to be exactly what I needed and for less than what others were charging. It's great that they include the races and the seal, which some people were charging extra for. Shipping was fast and made it easier to get the trailer back in action.


This was a perfect fit for my Triton trailer. Be sure to order 2 because this is one per wheel.


Chinese bearings seem ok and installed well. I was not happy with the packaging, as the inner and outer race were loose in package along with cotterpin and banging against each other during shipment. I’m a machinist and used to a little more care on handling bearings. No overall problems though. I would still recommend these.


Bearings worked great on my canoe trailer. Good price. very satisfied.


The bearing kits ordered were exactly as described & were very well packed. Although (it could have been the carrier and not Etrailer's fault) I thought waiting 2 weeks was a little long to wait for the order to be delivered. That being said however; the status of the shipping estimate was spot-on.


I bought these as a backup to my new hubs that I purchased from Etrailer. Haven't needed them, but good to know I have the parts as spares.


Perfect fit and great quality. I was worried this would be a hard to find size. etrailer it had from the first try.


Great service, very informed pleasant staff, excellent products and very fast delivery! What more could you ask for.

etrailer products are great. I tow a trailer behind my motorcycle and grease the bearings every 5000 miles. 20000 last summer with no problems. Thank you etrailer
Rick B - 05/06/2022


Always have been happy with etrailer products but........for an 'in stock' item ordered on a Monday to not be shipped until Friday is not what I consider up to your usual standards.


Exact replacement.


Everything fit and shipping was fast without damage! Just installed Saturday and we’ll see how they perform


Easy to install. I have my fifth wheel hitch in all summer for my RV so its great to have 1 hitch


Ordered these for my old trailer hubs with one inch axels but they did not fit the hubs. Ended up ordering new hub assemblies from another vender at a lower price. Still have the bearing kits. Wasn't allowed to send them back because I had opened the package. Measure EVERYTHING on your old parts before ordering anything to make sure the new parts will fit.


these bearings fit the mowing decks on old gravely rear engine riding mowers. this is the 3rd deck Ive rebuilt using these bearings and they work perfect.


everything i needed


this bearing kit is for incase of a on the road bearing failure happens. i replaced the hubs when i bought the trailer as the former owner thought wheel bearings needed to be tightened as much as he could [the new hubs i bought from you are great, so far i dont need the spare bearings thanks for having spare parts i may need]

by: 09/10/2022

Great web site experience. Exactly what I needed and ordered.


Just what was needed and page information was spot on.


Quick service easy website


It works very well. I did have to make a slight modification to the key-hole in the spindle so the cotter-key would fit, but once that happened, everything else was smooth. I've got thousands of miles on that trailer and expect more of the same.


Product is of good quality, Price is very good , However I did have to wait a considerable amount of time for it to get restocked on etrailers end. Once it was in stock it was shipped quickly.
Good thing I am a patient man.


This is a great site! Very helpful reviews and videos. Previous reviews I read before my purchase allowed me to know what to expect when I received my bearing kit. As stated in reviews, when you open the box, you find a clear plastic bag with parts bunched together. No fancy packaging, but, if the bearings do the job, who cares?



Xlnt service

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  • Bearings Needed For 1 Inch Diameter Spindle
    I did some research, and wasn't able to determine what BT8 actually means or where the term came from. Perhaps it was the stock number of the original spindle of that size. If your spindle is 1 inch in diameter, and not tapered, the #BK1-100 bearing kit you mentioned is probably the one you need. You can confirm this by knocking out the inner and outer bearing races and looking at the reference numbers. If the races are marked L44610, the # BK1-100 is the correct bearing kit. I'll link...
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  • Bearing Kit Recommendation that Include L44643 Bearings
    The bearing kit part # BK1-100 comes with two L44643 bearings like what you have and a grease seal # 24823 that has an inner diameter of 1.249 inches. If that is what you need then this would work well for you. The R at the end of your bearing number just means it was used in a heavy duty application. The bearings included with this kit would work just fine.
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  • Bearings Seem Loose on Strait Trailer Spindle
    It sounds like you have a BT8 spindle. It uses L44643 inner and outer bearings which have a 1 inch inner diameter. The BT8 spindle has a 0.99 inch diameter. If the inner diameter of the bearings was smaller you would not be able to get the bearings in place. Other than the L44643 bearings there aren't any that are close to the measurement of your spindle.
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  • Bearing Kit for 2,000 Pound Utility Trailer
    I believe the bearing kit you will need will be part # BK1-100. However, I was unable to exactly cross reference your seal number. I recommend measuring your spindle to find the inner diameter of the seal you need, as well as measuring your seal to find the outer diameter. To get the most precise measurement possible, it is best to measure with a digital caliper. I have attached a diagram showing the location of the grease seal seat that will give you the inner diameter needed for your...
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  • Why Would a Small Spring End Up Lodged in a Trailer Bearing
    On double lip trailer hub seals there is a small spring that is designed to hold the seal tight to the spindle. It sounds like that spring made its way off of the seal and into your bearing. Your best option would be to replace the bearings and seals. If the # BK1-100 has the bearings and seals that you would need this would be the correct kit. It comes with inner/outer bearings L44643 and a seal that has an inner diameter of 1.249. The bearings are both designed to fit a spindle that...
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  • Guide for Removing and Reinstalling Trailer Bearings
    I attached a video for you to check out that demonstrates how to remove, inspect, and reinstall trailer bearings. I also attached a second video that details how to pack bearings with grease. To pick out bearings for a trailer hub you will need to remove one of the hubs so that you can remove the bearings and get the numbers off of them. Or, you can measure the spindle where the bearings ride so that we can pick you out the correct bearings that would fit the spindle. I attached a picture...
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  • How to Pick Out Replacement Bearings/Seal for Trailer
    To pick out bearings/seal for a trailer hub you will need to remove one of the hubs so that you can remove the bearings and get the numbers off of them. Or, you can measure the spindle where the bearings/seal ride so that we can pick you out the correct bearings that would fit the spindle.
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  • Bearing Kit Recommendation for Trailer with BT8 Spindle
    Based on what you listed it sounds like you have a BT8 spindle. That would mean you have a seal dimension on your spindle of 1.24 inches and .99 inches where the bearings ride. That means for a bearing kit you would need # BK1-100.
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  • Possible Bearing Kit for Spindle that's Almost 1 inch in Diameter
    Sounds like you have a spindle that's almost 1 inch in diameter. The BT8 spindles are .99 inch in diameter where the bearings ride. Where the seal rides is 1.24 inches in diameter. If that matches what you have that would mean you need the bearing kit # BK1-100.
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  • Can Bearings for a 1-1/16 Inch Spindle Replace Bearings for a 1 Inch Spindle Using Same Hub
    Yes, the L44649 bearings for a 1-1/6" spindle will have the same outer diameter (1.980") as the L44643 bearings for a 1" spindle so you can obtain the Bearing Kit for 1" BT8 Spindle part # BK1-100 to reuse your hubs.
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