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Spindle Dimensions of a 3500 lb Axle

Question:

Need to know the size of the axle spindle where the lug hub slides on with bearings on a 2004 Branson care trailer. Axle is a 3500 lb with a 5 lug rim, tire is 205 75 D15

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Expert Reply:

3500 lb axles have the most common and most consistent spindle sizes. They are typically 1.73 inches at the seal, 1.38 inches at the inner bearing and 1.06 inches at the outer bearing like # TRU24FR. I've attached a video to assist.

I've linked the page to all of the options for hubs or hub/drum assemblies for this size spindle. There are 4 different sizes for 5 bolt assemblies and I've attached an article to assist.

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Follow up Questions

Gord

Wondering if anyone still uses 1.5" x 1.375" spindles? I'm looking for bearing/hub assembly for an axle I currently have but seems like these dimensions are no longer used? Would you have any leads on where one could find some (perhaps old) stock in these dimensions?

Etrailer Expert
Reply from Chris R.

Would you be able to pull one of your hubs and check the bearing numbers that are used? There should hopefully be numbers stamped right inside the inner and outer bearings.

Reply from Gord

@ChrisR I only have the axle, old bearing/hub assemblies long gone. I'm sure I can find bearings & seals from SKF or Timkin or whomever, it's a case of looking up a suitable bearing in that dimension. Finding hubs to match the bearings might be a different story. Any thoughts?

Etrailer Expert
Reply from Chris R.

@Gord Got it. We do have trailer bearings with those inside diameters - part # LM48548 that has a 1.375" inner diameter and # 2788 with a 1.500" inner diameter. Unfortunately we don't have any hub assemblies that use both though.

Reply from Gord

@ChrisR Can you suggest any place else which might have hubs in these (obsolete I guess) dimensions. I'm thinking not or you would have! Aaaarrrrggghhhh, maybe the axle is destined for the scrap bin! Lets talk about the axle tube itself; are axle tubes special dimension and/or material, or are they common seamless tubing (not just pipe I'm sure)?

Etrailer Expert
Reply from Chris R.

@Gord I don't have any specific ideas as to where these size hubs might be found. If you have any local trailer dealers or shops around you could check with them (if they don't actually have the hubs they might have some additional resources/ideas).

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