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  1. Trailer Spindles
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  4. Standard Spindle
  5. 1-1/2 Inch Diameter
  6. Square
Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide

Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide

Item # TRU47FR
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Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide Square TRU47FR
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Replacement #84 spindle welds onto your 3,500-lb trailer axle. Works with L68149 inner bearing and L44649 outer bearing. Castle nut, washer, and cotter pin included. Lowest Prices for the best trailer spindles from TruRyde. Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide part number TRU47FR can be ordered online at etrailer.com or call 800-298-1624 for expert service.
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  • Reviews (9)
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  • Why etrailer?

TruRyde Trailer Spindles - TRU47FR

  • For 3500 lb Axle
  • Standard Spindle
  • 1-1/2 Inch Diameter
  • Square
  • TruRyde

Replacement #84 spindle welds onto your 3,500-lb trailer axle. Works with L68149 inner bearing and L44649 outer bearing. Castle nut, washer, and cotter pin included.


Features:

  • Tapered spindle replaces a worn or damaged #84 spindle on your trailer
    • Can also be used to build a custom axle
  • Weld-on installation
  • Sturdy steel construction
  • Castle nut, washer, and cotter pin included


Specs:

  • Application: 3,500-lb trailer axles
    • Spindle capacity: 1,750 lbs
  • Stub dimensions: 1-1/2" wide x 3-5/8" long
  • Overall spindle length: 8-1/4"


Bearing, Race, and Seal Information

  • Bearings (sold separately)
    • Inner bearing: L68149 (1.378" inner diameter)
    • Outer bearing: L44649 (1.063" inner diameter)
  • Races (sold separately)
    • Inner race: L68111
    • Outer race: L44610
  • Grease seal (sold separately): 58846
    • Inner diameter: 1.719"
    • Outer diameter: 2.565"

spindle diagram

Part NumberCapacityABCDEFRound/Square
TRU47FR1,750 lbs1.50"1.719"1.378"1.063"1.00"3.625"Square




SP-20484-SQNWC TruRyde (TRP) Replacement #84 Square Spindle for 3.5K Axles - 1.50" Wide x 8.25" OAL

Replaces SP20484






Customer Reviews

Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide - TRU47FR

Average Customer Rating:  4.9 out of 5 stars   (9 Customer Reviews)

Replacement #84 spindle welds onto your 3,500-lb trailer axle. Works with L68149 inner bearing and L44649 outer bearing. Castle nut, washer, and cotter pin included.

- TRU47FR
by:

I will use them for all my trailer needs in the future very help full through my trailer build. Thanks



- TRU47FR
by:

Competitive pricing, quality item, fast shipping, Thanks WooooooooooHoooooooo!



- TRU47FR
by:

Items was as described and what I needed for my job.



- TRU47FR
by:

1 1/2 spindle is the correct product. Once the spindles are,welded into the new axle the axle will be complete and should last for years .



- TRU47FR
by:

Just what I ordered. Shipped quickly. Arrived quickly



- TRU47FR
by:

Great service and products.



- TRU47FR
by:



- TRU47FR
by:



- TRU47FR
by:


9
9

Ask the Experts about this TruRyde Trailer Spindles



  • Replacing a Damaged Trailer Axle
    Having the bearing numbers and spring seat measurements, you will definitely get most of the way to finding new parts, but you will need a couple more things to confirm the replacements will be correct. The spring seats are only half of the measurements needed to find the correct axle. You will need to measure from hub face to hub face to make sure the total length of the axle is correct as well. Granted with your hub and spindle being damaged, you will just need to get it as close as...
    view full answer...
  • Is It Ok To Use A Scratched Spindle On A Trailer Axle
    It will depend on how deep and long the scratch is. You want to make sure the bearing will still get a good purchase on the spindle, but you will also need to make sure the seal will not have a gap that will allow grease or oil to leak out. If the bearing is sitting weird or if there is a gap with the seal, you will need to replace the spindle. We do have a bunch of different options for this and I included a link to our spindle page, just in case.
    view full answer...
  • How to Pick Out Replacement Hub for Ski Boat Trailer
    In order to pick out the correct hub assembly for a trailer you are going to need know a few key pieces of information. The first thing you will need to know is the bolt pattern of your hubs. This is so you get a hub that is compatible with your wheels. I attached an FAQ article on determining bolt pattern for you to check out. Next thing you will need to know is what spindle you have on your trailer. In order to do that you can either get the inner and outer bearing numbers from a hub...
    view full answer...
    Image 1 for
  • How to Pick Out Replacement Trailer Hub for Trailer
    In order to pick out the correct hub assembly for a trailer you are going to need know a few key pieces of information. The first thing you will need to know is the bolt pattern of your hubs. This is so you get a hub that is compatible with your wheels. I attached an FAQ article on determining bolt pattern for you to check out. Next thing you will need to know is what spindle you have on your trailer. In order to do that you can either get the inner and outer bearing numbers from a hub...
    view full answer...
    Image 1 for
  • How to Pick Out Replacement Hub for Trailer
    To replace a spindle, the old one would need to be cut off, and the new one welded into place. This is NOT a job for the do-it-yourselfer. The new spindle must be absolutely square with the axle in order to prevent premature tire wear and wheel tracking problems. I would recommend finding a welder who is experienced with trailer axles. Your local RV dealer or repair facility could probably refer you. You will need to go with a hub that matches the weight capacity needed and the bolt pattern...
    view full answer...
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  • Availability of Spindle that Would Fit Square Tube Axle
    New spindles should be welded on only by a professional welder who has experience and the correct jigs for installing spindles perfectly straight and concentric. If not installed correctly the trailer may not track properly and uneven tire wear can occur. It might be more trouble than it's worth to try and fit a round spindle like the part # TRU24FR in a square tube axle by trimming it. We have a square version of this spindle as part # TRU47FR.
    view full answer...
  • What Size Axle Does a #84 Spindle Fit
    A true 1 inch spindle is a BT8 spindle, like # TRU94FR. The next closest one would be the BTR spindle which is commonly referred to as a 1-1/16 inch spindle, like # TRU44FR and is more common than the BT8. Both of these are typically used with 2,000 lb axles. A #84 spindle, like # TRU24FR or # TRU47FR is bigger and is used for 3,500 lb axles. Common sizes for these are 2-3/8 inch round axle, 3 inch round axle, and 2 inch square axle. I have linked a helpful page that shows the different...
    view full answer...
  • Replacement 3500 lb Axle for 5x12 Single Axle Utility Trailer
    Rather than trying to assemble axles from tubing and spindles, I'd highly recommend you go with a manufactured axle. Having a manufactured axle will provide you with a known weight capacity. Welding spindles to an axle tube is a very specialized skill that shouldn't be farmed out to that dude down the street who knows how to stick things together. 2-3/8 inches is the typical OD of axle tube for a 3500 lb axle. We offer some stock off the shelf axles in a 3500 lb capacity. The axles have...
    view full answer...
    Image 1 for
  • How to Pick Out Replacement Hubs for Small Trailer
    In order to pick out the correct hubs for your small trailer you are going to need know a few key pieces of information. The first thing you will need to know is the bolt pattern of your hubs. This is so you get a hub that is compatible with your wheels. I attached an FAQ article on determining bolt pattern for you to check out. Next thing you will need to know is what spindle you have on your trailer. In order to do that you can either get the inner and outer bearing numbers from a hub...
    view full answer...
    Image 1 for
  • Spindles for a Trailer Hub Assembly for 3500 lb Axle
    The following spindles will fit hub 84545BX 1. Square #84 Spindle for 3,500-lb Trailer Axles - 1-1/2" Wide (8-1/4" OAL) # TRU47FR 2. #84 Spindle for 3,500-lb Trailer Axles - 1-3/4" Diameter (8-1/4" OAL) # TRU64FR 3. #84 Spindle for 3,500-lb Trailer Axles - 1-3/4" Diameter (11-1/4" OAL) # TRU84FR
    view full answer...
  • Welding #84 Spindles # TRU84FR and # TRU57FR for Utility Trailer with 2-3/8 inch O.D. Pipe
    You have a 2-3/8 inch O.D. pipe so you might want to look at #84 Spindle, # TRU84FR, which has a 2 inch O.D. at the weld point and has a 1750 lb. capacity, so two spindles will give that axle 3,500 lb capacity. The #42 Spindle, TRU57FR which has a 2.25 inch O.D. at the weld point and is rated for 5,200 lbs to 7,000 lbs axles. The total capacities of the spindles are only valid if installed correctly and the axles are not broken or damaged in any way. The TruRyde #84 Spindle, # TRU47FR,...
    view full answer...
  • What Spindle Should be Used to Fit in Axle Tubing of 1-7/16 inch And 2,000 lb Capacity
    The best spindle option we have is the 2,000 lb axle spindle part # TRU94FR which has an outer diameter of where it would install in an axle of 1.25 inches. As far as the diameter of tubing to use for the axle we really can't recommend that and be able to ensure you'd have the capacity you'd need.
    view full answer...
  • Square Spindle that Trailer Hub T4084600042 Fits
    The spindle and hub you mentioned are not compatible with each other. For the hub part # T4084600042 the spindle you would want is the part # TRU97FR which is a square spindle like you said you were interested in.
    view full answer...
  • 84 Spindle with Brake Mounting Flange Recommendation
    Adding brake mounting flanges to a spindle is something that only a qualified welder with experience welding them on should do. A much easier solution would be to go with a spindle that has a flange mounted to it already like the part # TRU74FR that would fit the same hubs as the # TRU47FR that you referenced. Also, the # TRU47FR is a square spindle and we only offer flanges for round spindles.
    view full answer...
  • Spindle Recommendation for Trailer Hub with Bearing Dimensions of 1.25 and 1.75 inch
    The spindle you would need based on the dimensions you provided is what is referred to as a #42 spindle. The part # TRU37FR would fit and has a 5 bolt mounting flange for the brake assemblies. These have a 2,600 lb capacity per spindle. I attached a review video for you to check out as well as a picture that has all of the dimensions of the spindle listed.
    view full answer...
    Image 1 for
  • How To Determine If ST205/75R15 Tires Can Replace ST205/75R14 Tires On 1995 Travel Trailer
    It is possible that the ST205/75R15 will be able to replace the 205/75R14 tires currently on your 1995 travel trailer but you will need to take a few measurements to determine this. The ST205/75R15 like the Contender ST205/75R15 Radial Trailer Tire w/ 15" Vesper Silver Mod Wheel - 5 on 4-1/2 - LR D # MX84FR measures in at 7.99" wide and 27.13" tall where your ST205/75R14 tires measure in at 8.13" wide and 26.3" tall. To make sure you have enough clearance for a tire almost 1" taller you...
    view full answer...
  • Weld-On Spindle for Trash Trailer Without Suspension
    If you don't need any suspension, then you can use a square pipe and the TruRyde Spindle # TRU47FR you referenced welded directly to the trailer. I don't recommend welding the spindle without more support to disperse weight as a bump could cause that spindle to break or bend without more support. I assume you will be using for light loads but it is probably worth mentioning that no suspension cuts a trailer's capacity in half so with the unknown capacity of your trailer you won't be able...
    view full answer...
    Image 1 for
  • How to Determine the Correct Replacement Hub for an Old Jetski Trailer
    The best way to determine the correct replacement hub is to go by the bearing numbers stamped into the inner and outer bearings. With those numbers and the wheel bolt pattern I can determine exactly what you will need. (I have linked a how-to article that explains how to measure bolt pattern.) If you want to measure the spindle then use the dial calipers because the measurements have to be as accurate as possible. Please refer to the picture I have included that shows where to measure...
    view full answer...
    Image 1 for
  • How to Accurately Measure Spindle Dimensions
    The range of trailer spindles we offer is shown on the linked page. These include both round and square stub types rated for axles ranging from 2,000 lbs to 7,000 lbs. On the chart you can see the key dimensions for five points on the spindle, including where the grease seal rides (B) and where the bearings ride (C and D). Spindle dimensions must be taken with precision, to the nearest few thousandths of an inch; fractional dimensions are not accurate enough so you will want to use a precision...
    view full answer...
  • Looking for Grease Seal Bushing
    The surface of the # TRU47FR where the grease seal rides is an integral part of the spindle, not a bushing. We do offer some Bearing Buddy grease seals like # BB60002 that provide a bushing like the one you speak of, but nothing that would work with the specific # TRU47FR spindle you referenced. If you use a different spindle, I would be happy to recommend the proper Bearing Buddy grease seal for you, if one is available. If you would care to provide me with the inner and outer bearing...
    view full answer...
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  • How to Tell if a Trailer Spindle is Damaged or Needs to be Replaced
    If you remove the hub and wipe away the grease on the spindle you can check to see if it is damaged. Look for an scarring, gouges, discoloration, or scoring on the spindle. If the spindle is damaged then the bearings won't ride properly and can fail again or it can cause other problems such as uneven or excessive tire wear and ride quality problems. If the spindle is damaged then you can't really repair it and the whole axle should be replaced. I doubt that this is the case based on your...
    view full answer...
  • How Do I Determine What Bearings and Hub are Needed for my Double Axle Trailer
    In order to determine what bearings you will need and whether or not you will be able to use the hub, you will need to take a couple of measurements on your spindle. I am including a diagram which illustrates the measurements that are needed. Once you have these measurements we will be able to determine what bearings are needed and from there, be able to tell whether you will be able to use the hub that you currently have. Please feel free to email me with your spindle measurements and...
    view full answer...
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  • Where to Measure on Trailer Spindles to Determine Replacement Hubs
    You will need to measure the diameter of the spindles where the seal and bearings ride. Check out the picture I attached that shows where this is. You will need an exact measurement so either a digital or dial caliper will be needed. To pick out the correct hubs you will also need to determine the bolt pattern of the hubs you currently have so that the new ones will be compatible with your current hubs. I attached an FAQ on how to determine this. If you get back to me with that information...
    view full answer...
    Image 1 for
  • How to Pick Out Hubs for a Boat Trailer
    In order to pick out the correct hub assembly for a trailer you are going to need know a few key pieces of information. The first thing you will need to know is the bolt pattern of your hubs. This is so you get a hub that is compatible with your wheels. I attached an FAQ article on determining bolt pattern for you to check out. Next thing you will need to know is what spindle you have on your trailer. In order to do that you can either get the inner and outer bearing numbers from a hub...
    view full answer...
    Image 1 for


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Info for this part was:

Employee Mike L
Expert Research:
Mike L
Employee Jameson C
Expert Research:
Jameson C
Employee Lindsey S
Edited by:
Lindsey S
Employee Kathleen M
Installed by:
Kathleen M
Employee Alexander C
Written by:
Alexander C

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