Slipper Spring Hanger Positioning for 7,000 lb Tandem Axle

Question

Question:

I’m building a tandem with7k slipper spring axles . From eye to inside of slipper part is 26 3/4. How do I figure out location of hangers. I’ve never dealt with slipper springs before. I have a 12 inch equalizer.

asked by: Chris H

0

Expert Reply:

The spring hanger placement is going to be determined by your axle spacing. For example, if your axles are spaced 33 inches apart, as shown in the attached diagram, a 7K axle slipper spring, like # e74SR, requires a distance of 28-1/2 inches between the front and center hangers and 29-1/2 inches between the center and rear hangers, when using our Tandem-Axle Trailer Hanger Kit for 2" Slipper Springs with 12" Long Equalizers, # APT6SE.

I'm not sure exactly where you measured the 26-3/4 dimension of your spring, but I've also included a diagram to show you the typical slipper spring dimensions we take into account. For spring # e74SR, the "B" dimension of 22-3/4 inches is the distance required between the first hanger and the mounting point on the equalizer. The "C" dimension of 26-5/8 inches is the distance from the center of the eye to the end of the slipper.

I've attached our Axle Placement Help Article for you at the bottom of this page as well.

expert reply by: Carla M

0

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Manuel

11/14/2021

I’m building a triple axle trailer and I’m using some E 5115 7000# axles. My question is the dimension on my hangers. The distance apart of each hanger. Thanks

Reply

Les D.

11/18/2021

@Manuel First, you have to take a look at the article I have attached for you. The distance between hangers is dependant on your leaf spring length.Having a triple axle is just adding half again the parts from the tandem axle set up.

Helpful Links

faq-where-to-position-trailer-axle.aspx

Reply

Darryl

3/6/2024

I am confused with the hanger drawing. It shows dims that do not line up with the description. Dim c shows CL of hanger, yet description states dim between ubolts. Dim B shows distance between axles, but states distance between hangers?

Reply

Mike L.

3/7/2024

@Darryl That was a typo when the table was constructed, as well as a mislabeling. The diagram/table shown on the # APT6SE product page (see link) are correct. The dimension mentioned as 'distance between u-bolts' is the center to center distance between the axle centerlines.

Helpful Links

trailer-leaf-spring-suspension/etrailer/apt6se.html

Reply

Answer 1

Hey Lucas, thanks for reaching out! We have the Equalizer for 2" Wide Slipper Springs #TREQ4541 that looks to match the description you're needing, but this doesn't come in a full-fledged kit because it's from a different…

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Answer 2

Hi Ryan; I have attached a diagram below of the #TREQ1304 for your reference. Go ahead and compare these measurements to your current equalizer. If the distance between the holes lines up with yours this is what I would choose. The #APT6SE equalizer…

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Answer 3

Hey Paul; it looks like the bolt hole has been elongated/enlarged from use over time. This is something that can happen from standard suspension wear. It should match the 9/16" bolt. With the hole being that large I would say it is time to…

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Answer 4

Hey Keith, yes, as long as you have 13 1/8" long equalizers, the Tandem-Axle Trailer Equalizer Kit for 2" Slipper Springs #AP216 will work great! If you have something different please let me know and I'd be happy to help!

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Answer 5

The equalizer in the Tandem-Axle Trailer Equalizer Kit #AP216 is 11-1/2" on center from the outer spring mounting holes when measuring horizontal separation. One hole will be 6" on center from the equalizer mounting hole center and the…

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Answer 6

For a single piece, 9/16" lug nut for your trailer we offer the DeeMaxx Trailer Wheel Lug Nut #DE25GR.

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Answer 7

Hi Kat, Yes, for a 9/16" wheel stud I recommend the DeeMaxx Trailer Wheel Lug Nut #DE25GR. This lug nut fits 9/16" - 18 wheel studs. 18 threads per inch is pretty standard but if you wanted to go the extra mile to make sure they fit you can…

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Answer 8

For your 28' enclosed trailer I recommend the Furrion Chill HE RV Air Conditioner System - Single Zone - 15,000 Btu - Black #FR23PV. If the ceiling of the trailer isn't too high and you can reach the air distribution box and don't want to…

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Answer 9

A hub such as #42866UC3 fits on the spindle which is welded to the axle and spindles can have different capacities as well. The camber or bow of an axle, its length, the quality of materials, the diameter, and many other factors go into its capacity…

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Answer 10

Thank you for providing the specs for the suspension components that you already have. Correct hanger spacing really depends on the components being used such as springs, hangers and equalizers. Most of the hanger spacing dimensions that we have are…

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Answer 11

Hydrastar has a slip-on style version of their 7k disc brake kit with the part #HSE7K-T1SO. You will also need idler hubs too like with the part #AKIHUB-865-7-1-EZ-K but you should note that we don't have any oil-bath idler hubs in this capacity.…

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Answer 12

To determine the location for the front and rear hangers on your tandem axle trailer you will first need to make sure that you have the correct center point for your equalizer hanger. The center point of your equalizer hanger needs to be located…

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Slipper Spring Hanger Positioning for 7,000 lb Tandem Axle

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