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

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…

view full answer...

Answer 2

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.…

view full answer...

Answer 3

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…

view full answer...

Answer 4

Hi John! The Steel Trailer Wheel - 8" x 3-3/4" Rim - 5 on 4-1/2 - Galvanized Finish #AM20008 that the Kenda 5.70-8 Bias Trailer Tire with 8" Galvanized Wheel - 5 on 4-1/2 - Load Range B #AM30110 uses actually has zero offset. So the…

view full answer...

Answer 5

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…

view full answer...

Answer 6

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…

view full answer...

Answer 7

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…

view full answer...

Answer 8

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…

view full answer...

Answer 9

Yes, a negative offset moves the tire further away from the axle/trailer, while a positive offset will move the tire closer to the trailer. Most of the trailer wheels we carry have a zero offset, which means that the the mounting surface is on the…

view full answer...

Answer 10

The inner diameter of bearing #L44649 is 1.063 inches. The inner diameter of bearing #L68149 is 1.378 inches. Both fit on a #84 spindle. The matching race for bearing L44649 is #L44610. And the matching race for bearing L68149 is #L68111. These…

view full answer...

Answer 11

To determine the size of the brake assemblies you need you have to measure the depth and width of the hub drum on the axle like what you see in the picture I attached. The most common size is 2-1/4 inch wide like the #T4071600-500 that you…

view full answer...

Answer 12

Your 3,500 lb trailer has a BT8 spindle which only fits with specific bearings and seals. Because of this we'll need to stick with 7" brakes as that's the only size compatible with the hubs that fit your smaller spindle. Here are the…

view full answer...

How to Determine Hub and Spindle Size

Products Featured in This Question

Product Page this Question was Asked From

Continue Researching