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

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 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…

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Answer 3

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…

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Answer 4

The easiest way to determine the correct bearings for your trailer is to use the industry standard numbers stamped into the lip of the bearings. This would require removal of the hub. Your measurement, 1-1/16 inches, comes to 1.0625 inches and the…

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Answer 5

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 6

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 7

In order to verify the spindle dimensions so that you can pick out the correct hub/drum you have to get exact dimensions. For that you need to use a digital caliper like part #PTW80157. For how old your trailer is this is especially important as the…

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Answer 8

I assume this is a replacement axle, so in order to choose the correct one, you will need to know the dimensions of your current axle's hub-face to hub-face and spring center to spring center as in the diagram I have added, with A being the hub…

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Answer 9

Based on your picture it looks like the left side is #30-92-004 and the right side would be #30-92-002. These lights are 8-9/16 inches across, 4-9/16 inches tall, and 2-1/8 inches deep. Just for reference on the wiring, since you can't always go…

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Answer 10

You can verify that the 10-19 grease seal included in Bearing Kit #BK2-100 is the correct one for your spindles by taking two measurements. First you want to measure the rear hub bore where the seal is inserted. The seal's outer diameter needs to…

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Answer 11

Based on the inner and outer bearing numbers you provided (thank you!) the correct trailer hub assembly for your utility trailer is the #DX22XR. This hub does use the same #LM67048 inner bearing and #LM11949 as your existing assemblies. It is…

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Answer 12

The pilot hole on a wheel is the big center hole right in the middle of the wheel. It fits over the hub.. It can be tough to measure these with the wheel still on the trailer so you will want to remove the wheel and then it will be easier to measure.…

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How to Determine Hub and Spindle Size

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