How to Determine Hub and Spindle Size

Question

Question:

Your 1.5 spinle has the 2nd measurement as 1.73, which is wrong. thats the dim for the 1.75 hubs 2nd dim.

asked by: bill p

0

Expert Reply:

The spindle dimensions are as follows: A is the mounting dimension, B is the seal dimension, C is the inner bearing surface, D is the outer bearing surface and E is the diameter of the threaded portion of the spindle for spindle nut selection.

Say you need a spindle and hub for a wheel with 5 on 4-1/2 inch bolt pattern and an axle that is 3500 lbs. For a single axle trailer you can use two of either the item # TRU64FR, if your axle is round or item # TRU47FR if your axle is square. Then you need two hubs, part # 84545BX. If you want to use EZ-Lube spindles and hubs you will need to order the round spindles, item # TRU74FR and the EZ-lube hubs item # 84545UC1-EZ hubs.

If you have a spindle you need a hub for let me know the dimensions and I will be glad to recommend the proper parts for your trailer.

expert reply by: Robert G

0

Paolo

4/18/2013

Bob G i have a question, i am rehabing an old trailer that has 6 lugs on a 5.5 circle and can not find new hubs anywhere. The outer bearing diameter on the spindle is 1 in and from what i see the inner bearing spindle diameter is 1.5in. If you have any advice i would love the helpThank you

Patrick B.

4/25/2013

We have quite a few hubs that cover the 6 on 5-1/2 bolt pattern. What we need to determine still is the spindle that we need to fit to. The easiest way to do that is to look at the bearings and the seal/s and find their part numbers. Once we get that established it will be easy to determine what hubs are available. If the numbers cannot be found on the bearings, then we can measure the spindle, but that needs to be done using a dial or digital caliper to measure 3 decimals or thousandths. Here is a link to all the 6 on 5-1/2 hubs and drums we have.

Helpful Links

dept-pg-Trailer_Hubs_and_Drums-sz-6_on_5~1|2_Inch.aspx

Answer 1

Hey Scott! The correct bearing kit for your Dexter 6k axle is the Bearing Kit, 15123/ 25580 Bearings, 10-36 Seal #BK3-100. If you want the Dexter version it is the #DX26ER. What kind of trailer do you have?

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Answer 2

I see you were looking at the Dexter Trailer Axle Beam #8327834 which uses a #42 Spindle #TRU37FR. This axle will allow for a Hub/Drum with Inner Bearing #25580(1.75" inner diameter), Outer Bearing #14125A(1.25" inner diameter) and Grease…

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Answer 3

The spring center and hub face measurements that you have are more synonymous of a 3,500 lb weight capacity which is why you are having a hard time trying to find an axle with 5,200 lb weight capacity. That said, I do have an option for you in the…

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Answer 4

My recommendation is to replace your axle with a 5,200lb like #e55SR as the 4,400lb spindle is so uncommon they are not readily available. This will give you stronger components to lessen the chance of you having to replace a spindle in the future.…

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Answer 5

EZ Lube axles like the item #T3584F-EZ-8974 come from the factory with just a little bit of grease in the bearings. The first time you use the EZ Lube feature to fill the axle, it will take a lot of grease. You will probably use 3/4 to a full tube…

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Answer 6

To determine the size of the hub assembly you need to purchase you have to determine which bearings are in the old assembly. If the old assembly has L44649 inner bearings, you would use the hub you chose #8-258-5UC1. If the inner bearings are marked…

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Answer 7

The only hub that we have that fits an Inner Bearing #LM67048 (1-1/4") and Outer Bearing #LM11949 (3/4") is the Trailer Hub Assembly #AH15450ECOMP. This is only available in a 4 on 5" lug bolt pattern. To get to the 5 on 4-1/2"…

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Answer 8

The Dexter Brake Actuator part #099-175-20 replaced the Titan 60 that has a master cylinder with a fitting at the end. The fitting is a 3/16 inverted flare where the brake lines connect to. You do not need an extra fitting when you use the actuator.…

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Answer 9

I have included a picture that shows the measurements needed for a spindle, bearings, seals, faces, and hubs. The spindle measurements are labeled A through F. A is the spindle shaft diameter B is where the grease seal sits C is where the inner…

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Answer 10

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…

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Answer 11

If you are replacing your current spindles with the 1-1/4 inch spindle #TRU94FR, then the 5 on 4-1/2 trailer hub I recommend for your 2,000lbs trailer axle are the etrailer #AKIHUB-545-2-1K. This hub will be compatible with the L44643 bearing sizes…

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Answer 12

The TruRyde Spindle #TRU94FR and our Trailer Idler Hub Assembly #AKIHUB-545-2-2K are not compatible, but you could use the TruRyde EZ Lube Spindle #TRU44FR instead as it has the correct spindle measurements. For a hub that will work with the TruRyde…

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How to Determine Hub and Spindle Size

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