Tips for Determining Square Trailer Axle Capacity

Question

Question:

I found a question that someone else asked about weight capacity of a square axle. I also have the same question about my 1 3/4inch square axle. The outer bearing is Tyson #09067 and inner bearing is Timken #15123. Also, I have a 5 on 4.5 lug pattern and 15 inch wheels. Are you able to help me find an approximate capacity for my axle?

asked by: Will

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Expert Reply:

Square axles can be tough to determine capacity. Often times the same spindle fits a range of axle capacities. The best way to determine the capacity is to get the inner and outer bearing numbers stamped into the metal of the bearings like you did. The numbers you listed do not match any of the spindles we carry though so I was not able to determine anything from that. The bolt pattern of the hubs on the trailer is typically used on 2k-3.5k axles, most 15 inch wheel trailer setups have a capacity of about that range as well. The best recommendation I could make would be to stay on the low side of that range.

There could also be a plate on the axle itself that lists the capacity. The most common place to find axle capacity is on a plate or sticker on the trailer frame on or near the tongue. Sometimes its location on the inboard side of the frame.

expert reply by: Jameson C

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Answer 1

The best option we have is the trailer leaf spring part #e49SR which is for a 2,900 lb trailer axle and has an overall length of 30 inches and is 1-3/4 inches wide. This might be a little longer than what you have now but since it has a straight…

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Answer 2

Yes you can replace the leaf springs that came standard on the trailer to soften the ride of the trailer. Just be advised that the total capacity of the trailer will be lowered because you will be limited by the lower rated springs. You can refer…

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Answer 3

I would be more than happy to help you get everything together that you need for the suspension on your gooseneck trailer for your tiny house! It sounds like you're needing the Dexter Trailer Axle w/ Electric Brakes - E-Z Lube - 8 on 6-1/2…

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Answer 4

To find the load capacity for your axle you should look on the trailer VIN plate or sticker that lists the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that…

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Answer 5

Often an axle's weight rating will appear on a sticker or plate on the axle beam itself, or sometimes the trailer's main identification sticker will include axle ratings. This is helpful unless of course the axles have been replaced…

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Answer 6

The recommended clearance with leaf spring suspension on an unloaded trailer is between 2 - 2-1/2 inches. You should have sufficient clearance with your loaded trailer, as leaf springs only tend to deflect 1-1/2 inch when carrying a load.

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Answer 7

As long as you have at least 2-1/2" between your axles and the frame of your trailer when it is unloaded you should be good to go. Altogether your leaf springs should only be deflecting about 1-1/2" when carrying a load. If you…

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Answer 8

Trailer axles made from square tubing tend not to be weight-rated as consistently as round axles. In other words there is more potential variance in the weight rating of a square axle; two axles of the same dimensions could easily be rated…

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Answer 9

The trailer will have a plate or sticker on it that will list the VIN number. The weight rating of the axle should be listed on that same plate or sticker. Also, the axle could have a tag or plate on it that will list the weight capacity. You can…

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Answer 10

Thank you for the feedback, we sure do appreciate it! It's hard to say what the rubbing noise you are hearing is but I suspect the shoes on the backing plate are coming into contact with the drum which is completely normal but don't…

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Answer 11

There is no exact way to determine the leaf spring length. The best way to determine the length for a replacement is by measuring the existing leaf springs. The hanger distance and shackle length can help you get a good idea, but you're…

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Answer 12

Looks like you found the chart that Jeff D made that shows common axle capacities based on diameter: Typical Axle Diameters Based on Axle Capacity - 1,000-lb - 2,000-lb Axles: 1-1/2 inch - 1-3/4 inch diameter - 3,500-lb Axles: 2-3/8 inch diameter -…

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Tips for Determining Square Trailer Axle Capacity

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