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

Reply

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

Reply

Answer 1

The easiest way to determine what spindle your trailer has is to use a dial or digital caliper like the part #PTW80157 to measure it where the bearings and grease seal ride. I attached a picture that shows where these measurements are. If where the…

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Answer 2

Trailer wheel bearings are specific to the spindle that is installed on the axle that is on your trailer. You will need to safely support the trailer, remove the wheel and tire, remove the grease cap, remove the cotter pin and washer that secures the…

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Answer 3

The #99 trailer spindle is typically found on 9,000 lb and 10,000 lb axles. This is not a spindle that we carry at this time, but I did find some of the measurements. I have attached a diagram showing the dimensions of a #99 spindle for you to check…

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Answer 4

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 5

To determine your spindle size, you can either pull one hub off your trailer and look at the bearing numbers on the face of the inner and the outer bearing, or you can measure the spindle itself. I've attached an article and a photo to assist. If…

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Answer 6

The measurements you gave aren't quite enough because you have to measure the spindle down to the thousandths of an inch. So you need to use a digital caliper and measure your spindle at the places in the diagram you say (which I also posted for…

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Answer 7

Good morning, Harold! To replace the hubs on your boat trailer I recommend either the Idler #AKIHUB-545-35-G-EZ-K or the Hub/Drum #AKHD-545-35-G-EZ-K because they have a galvanized finish so they will hold up much better to water than the standard…

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Answer 8

So after quite a bit of research it seems that the Trostel 300-156-6 seals you mentioned are quite old and have not been around for some time. The best I could find was that they are 3.00" in outer diameter, and I did manage to find a customer…

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Answer 9

The bearings in trailer hubs are measured to very precise dimensions, to the nearest thousandth of an inch, such as 1.234-inches. To find a suitable replacement hub to fit on your existing trailer spindles either the bearing part numbers or these…

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Answer 10

Most axles rated at 3,500 lbs will have the inner bearing, part #L68149, and the outer bearing, part #L44649. This is something you can check. The bearings and seals have numbers. They are actually engraved on the bearings and the seals. If you are…

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Answer 11

I am not 100 percent sure what you are asking but it sounds from what I can gather that your bearings don't fit? If that is indeed the case then you need to ensure you have the right size bearings, and there are only two ways to accomplish that.…

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Answer 12

The #84 spindle is just a common way to identify the spindle dimensions typically used for 3,500 lb axles. So instead of listing out the parts, people can just say they have #84 spindles and it's easier to know what fits it. The CE Smith Trailer…

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How to Determine Hub and Spindle Size

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