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Replacement Trailer Hub Bearing - 3984
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Replacement Trailer Hub Bearing - 3984

Part Number: 3984
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$30.74
Retail:$32.43
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Trailer Bearings Races Seals Caps
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High-quality, tapered roller bearing is designed for high-speed use. Replacement part uses industry-standard number. Great Prices for the best trailer bearings races seals caps from etrailer. Replacement Trailer Hub Bearing - 3984 part number 3984 can be ordered online at etrailer.com or call 1-800-940-8924 for expert service.
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  • Reviews (1930)
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  • Videos (1)
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etrailer Trailer Bearings Races Seals Caps - 3984

  • Bearings
  • Standard Bearings
  • 12000 lbs Axle
  • 15000 lbs Axle
  • 2.625 Inch I.D.
  • Bearing 3984
  • etrailer
  • Race 3920

High-quality, tapered roller bearing is designed for high-speed use. Replacement part uses industry-standard number.


Features:

  • Inner diameter: 2.625"
  • Matching race (sold separately): 3920
  • Application: inner bearing for 8-216-5, 8-214-8, 8-217-5 and 8-272-5 hubs


3984 Replacement Bearing





Video of Replacement Trailer Hub Bearing - 3984

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




Video Transcript for Detailed Breakdown of the Replacement Trailer Hub Bearing

Today, were going to review part number 3984. This is the Axle Tek Inner Wheel Bearing. This replacement bearing is a high quality, tapered roller wheel bearings designed for high-speed use. All bearings have industry standard number regardless of the brand. On this wheel, bearing you can actually see the part number. Itll be stamped right on there, 3984.Basically, this wheel bearing will consist of three parts.

Has the inner cone, has the tapered roller bearings and the roller bearings are actually in a cage or a roller retainer, its called. When this is installed on the spindle, it would be lubricated with either grease, wheel bearing grease or oil.One of the most critical measurements when replacing your wheel bearings is you do have to make sure the inner diameter, which is this part right in here. Needs to match what you have on the trailer right now. To get an actual measurement you would need to use either a dial or a digital caliper like we have here because most of the time the numbers are extended out to thousandths of an inch. In this case, when we measure the inner bearing, it would measure 2.625.

That would be your critical measurement.This bearing here is made to use on a bearing race, which is not included. It is sold separately. The bearing race would be part number 3920. The critical measurement on the bearing race would be the outer diameter measurement, which would be 4.438. That should do it for review on part number 3984.

Customer Satisfaction Score:


Customer Reviews

Replacement Trailer Hub Bearing - 3984 - 3984

Average Customer Rating:  4.7 out of 5 stars   (1930 Customer Reviews)

High-quality, tapered roller bearing is designed for high-speed use. Replacement part uses industry-standard number.

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great quality and price



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

  • Hub Assembly for Big Tex Trailer With Tandem 12k Axles
    We do offer one 12,000 lb idler hub assembly which is the Dexter # 8-214-8UC1. This uses # 3984 inner and # 28682 outer bearings.
    view full answer...
  • Will Dexter Idler Hub for 12k Axles Fit Lippert Axle
    More than likely your Lippert axle uses the standard # 3984 inner and # 28682 outer bearing. I would double check to be sure. Assuming that is correct, the Dexter Trailer Idler Hub Assembly for 12,000-lb Axles # 8-214-8UC1 will fit.
    view full answer...
  • Replacement Hub And Drums For Dexter 12K Axle
    We have the perfect idler hub set up for you! The Dexter Trailer Idler Hub Assembly for 12,000-lb Axles # 8-214-8UC1 has an inner bearing # 3984 and an outer bearing # 28682. The idler hub has a bolt pattern of 8 on 6-1/2 inches. The hub has an oil bath system that allows for easy maintenance. The Drum and Mounting Bolts # 7-103 are sold separately. The Kodiak Disc Brake Kit # K2HR12A11-120DW will not work with your 12K Dexter axle because this kit is only for a 12,000 ALKO axle. The...
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  • Replacement Hub and Drum Assembly for 15,000 Pound Axles
    Although I do not have an option to retrofit your hubs I do have a solution. What I can offer is a complete replacement with the Dexter Trailer Hub and Drum Assembly for Heavy-Duty 15K Axles # DX78QR. If you're just looking for replacement races, bearings, and seals we have those available as well. This hub uses an 8 on 275 mm bolt pattern. It would also require switching to oil bath from the grease. In addition to the hub and drum assembly, or for replacement bearings and seals, you would...
    view full answer...
  • Disc Brake Assemblies For Changing A 12,000LB Dexter Axle To Hydraulic Disc Brakes
    We have the Kodiak Disc Brake Kit # K2R1258L12 that is designed to fit your 12,000lb Dexter axle. You will need to ensure that you have the Standard Duty 12,000lb axle as this kit will not fit if its a Heavy Duty 12,000lb axle. If you need help determining which you have please let me know your axle serial number that is on the information sticker for the axle or can also be found stamped in the axle tube on the rear of the axle on the passenger side. The Kodiak Disc Brake Kit # K2HR12A11-120DW...
    view full answer...
  • Dexter D120 Axle Replacement Parts
    Your Dexter D120 axle is rated for 11,999.80lbs, has a spring center measurement of 45.5" and track width of 74". It is an underslung axle that uses 3" wide 30" slipper springs rated at 6,000lbs each. The brakes are 12-1/4" x 5" electric brakes and the hub is an oil bath with 8 on 6.5" wheel bolt pattern. It was produced in March of 2000. Electric Trailer Brake Kit # AKEBRK-12 Dexter Trailer Idler Hub Assembly # 8-214-8UC1 Inner Hub Bearing # 3984 Inner Race # 3920 Outer Hub Bearing #...
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  • 12,000 lb Electric Trailer Brakes & Replacement Oil Seal & Bearings For 12k Dexter Axle
    I was able to find everything you need for your 12,000 lb Dexter axles; the electric brakes, oil cap kit, oil seal, bearings, and races. I verified with Dexter that these are indeed the correct parts for your 12k axles. I'll go ahead and list out each of the parts you need to make it easier to order: - Electric Trailer Brake with Dust Shield - Self-Adjusting - 12-1/4" - Left Hand - 12,000 lbs # AKEBRK-12L - Electric Trailer Brake with Dust Shield - Self-Adjusting - 12-1/4" - Right Hand...
    view full answer...
  • Replacement Bearings for Dexter Axles with 12000-lbs Capacity
    The Replacement Trailer Hub Bearing # 3984 has an inner diameter of 2.625", so it's possible that it will work on your 12,000-lbs Dexter axle, but you'll need to know what bearings are in your hubs to confirm this is the correct replacement bearing. This bearing is designed to fit in Dexter hubs with part numbers: 8-216-5, 8-214-8, 8-217-5 and 8-272-5; the only hub we currently have available out of that group is the 8-214-8 with part # Dexter Trailer Idler Hub Assembly for 12,000-lb Axles...
    view full answer...
  • Are There Any 15K Trailer Idler Hub Assemblies Available
    The only 15K rated hub assembly that we currently offer without the drum would be Dexter part # DX42KR. This hub has an 8 on 275mm wheel bolt pattern and uses the following bearings, races, and seals: Inner Bearing Cup # 3920 Inner Bearing Cone # 3984 Outer Bearing Cup # 28622 Outer Bearing Cone # 28682 Oil Seal: # 10-56 Hub Cap: K71-148-00 Prior to purchase I recommend checking to make sure the bearings and seals will match your current setup, as well as the wheel bolt pattern so...
    view full answer...
  • How to Determine Correct Replacement Bearings for Continental Tilt C715 Single-Axle Boat Trailer
    The best way to identify correct replacement bearings for your 19-foot single-axle Continental Tilt C715 Boat Trailer is to locate the part number on the original bearings. An alternative method is to take measurements of the spindles but this method requires a precision digital caliper. Using the original part numbers is a much more reliable method. Trailer manufacturers may sometimes alter the components used in their trailers from one production run to another. Since I do not know the...
    view full answer...
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  • Replacement Bearing for an NTN Bearing # jm511946pk
    The bearing that you should need is # JM511946. It has an inner diameter of 2.559 inches. The matching race is # TRJM511910.
    view full answer...

Do you have a question about this Trailer Bearings Races Seals Cap?


Info for this part was:

Employee Michael H
Expert Research:
Michael H
Employee Adam R
Expert Research:
Adam R
Employee Jeff D
Installed by:
Jeff D
Employee Dustin K
Video Edited:
Dustin K
Employee Chris R
Video Edited:
Chris R
Employee Wilson B
Updated by:
Wilson B

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