3" Wide 7 Leaf Spring For15K Trailer Axle

Product Description

Specification

Slipper Trailer Leaf Spring - 7 Leaf - 7,500-lb Capacity

This 7 leaf heavy-duty trailer slipper spring can provide the shock absorption that your commercial trailer needs. This part is designed for 15K axles, and it can work with a number of trailer types. If you're building a utility trailer or car hauler, then let The Trailer Parts Outlet provide you with the products you need to get your equipment on the road. With the right springs, you can drive to that next job or destination with confidence, and you won't have to worry about a bumpy or jerky ride. Order your new 7 leaf heavy-duty slipper springs today!

Spring capacity:	7,500lbs
Axle capacity:	15,000 lbs
Length from center of spring eye to end of spring (unloaded):	30-1/2"(774mm)
Spring width:	3"(76mm)
Eye diameter with bushing:	1"Rubber bushing
Eye diameter without bushing:	2"
Leaf thickness:	3/8"(10mm)
Number of leaves:	7
Replacement Part Number Reference	Automann Number:URG30507RB; Dayton Number:US-3094; Dexter Number:72-45, 072-045-01, 72-45-1; MPN: UNA-270

Features:

* 7 leaf double-eye spring

* Flexes to absorb road shock and provide smooth ride

* Reduces wear and tear on trailer

* Ensures level ride on bumpy and uneven surfaces

* Mounts to trailer frame with hangers or a hanger kit (sold separately)

Leaf springs are an integral part of your trailer suspension system. The leaf springs provide the attachment points for your trailer's axle, suspending it from the frame of your trailer. Each spring flexes to absorb road shock as you travel, allowing the axle to move somewhat independently of the rest of your trailer. This helps to reduce wear and tear on the trailer and also ensures a smooth ride.

Slipper leaf springs attach to hangers that are welded onto your trailer. The eye of this spring will attach to the front hanger with a suspension bolt. The flat slipper end of the spring will slide into the rear hanger. If you have a tandem- or triple-axle trailer, the slipper end will slide into the equalizer that connects multiple springs. The shape of the slipper end of a leaf spring may vary slightly due to differences among trailer manufacturers. Because of this, it's important to check your leaf spring's slipper end before purchasing a replacement spring.

To mount this spring, you will need hangers, a suspension bolt, and possibly a spring keeper bolt, depending on the design of the rear hanger. If you are simply replacing a spring, you may still have hangers welded onto your trailer, but it would be wise to replace the bolts as they can experience wear. It is also recommended that you replace the other leaf spring in your setup at the same time. Because springs can sag and elongate as they wear, this new spring may not exactly match the old one, and the alignment of your trailer could be affected.

If you are fabricating a trailer, you will need to purchase a hanger kit for installation. To determine the type of hanger kit that you need, you must know the specific type of leaf spring that you have, as well as your axle capacity. Depending on the hanger kits used with them, springs can be configured to work for single-, tandem- or triple-axle applications. Hangers and other suspension components can also be purchased separately if there isn't a complete kit that works for your setup.

Measurement Method

How to measure Trailer Leaf Springs

Step 1:DETERMINE THE TYPE OF TRAILER SPRING 

Accurately measuring your trailer springs and choosing the correct replacements is important for the function of your trailer and will make the job of replacing them much easier. Using replacement trailer springs with the correct length will keep the axle in the same position, eliminating the need to move guards or suspension components like spring hangers. Matching your weight capacity, arch, and leaf count will keep the ride height of the trailer the same and keep the ride characteristics the same. 

Step 2: MEASURE THE WIDTH OF THE TRAILER SPRING

Measure the width of the spring. The majority of trailer springs for boat, motorcycle, horse, camping, flatbed, and utility trailers are 45mm wide.  To determine the width, simply measure along the center of the top leaf.

Step 3:MEASURE THE LENGTH OF THE TRAILER LEAF SPRING

Measure the length of the trailer leaf spring. If you are replacing a spring, getting the same length is important. To measure the free length, refer to letter "C" above. It is important that your trailer is unloaded when measuring the length. When determining length (C), measure from the center of one spring eye to the center of the other spring eye for double eye trailer springs. Measurements will vary depending on the age and fatigue of your spring. We offer a large selection of trailer springs. Determining the length first will narrow your selection down considerably and make finding the correct spring quicker.

Step 4:DETERMINE THE CAPACITY OF THE SPRINGS

Determine the rating of your trailer axle and then select the capacity of your springs. If you have a 1500 Kg. rated trailer axle with two springs, you will use two 750 Kg. rated trailer springs or higher. Please note, the capacity ratings are for each individual trailer spring.

Once you have determined the capacity, and number of springs, count the number of steel leafs your current springs have. If you are replacing all of your springs, the number of leafs will not be as important. You can switch from a 4 leaf to a 3 leaf trailer spring with thicker steel if you prefer.

Step 5:MEASURE FREE OPEN AND ARC OF THE TRAILER SPRING

Measure the free open (H) and the arc (A) and (B) of the trailer spring. These measurements are more for reference and will change with the age and fatigue of your spring. These measurements can show you the importance of replacing all of your springs rather than one at a time. If you have an older spring that has lost its arc over time and you add one new spring with a taller arc to the other side of your trailer, your trailer will lean to one side causing for an uneven load and unsafe conditions.

NOTE:

All trailer springs are sold individually, but it is highly recommended to change them in pairs.

Packing & Delivery

Company Profile

SHANDONG NORTH AUTOTECH CO. Ltd 

SHANDONG NORTH AUTOTECH CO. Ltd is a professional manufacturer of steel wheels and trailer parts in Zibo City, Shandong Province, China.
We specialized in manufacturing all kinds of electric axles, steel wheels and trailer parts, designed for use on Light Duty Trailers. Like as Utility Trailer Axle, Boat Trailer Axle, Car Haulers Trailer Axle, ATV Trailer Axle, Lawn & Landscape Trailer Axle, Motorcycle Trailer Axle, BBQ Pit Trailer Axle, Cargo Trailer Axle, Enclosed Trailer Axle, RV Trailer Axle & More. We can supply many trailer parts & accessories as follows: Towbars, axles, brake drums, hubs, brake disc, bearings, springs and springs and suspension kits, couplings, mudguards, U-Bolts, Jockey Wheels, keel rollers and brackets, wobble roller, wheel spacer, equalizers. Based on good and steady-going quality, competitive prices and better services, most of our products are well exported to North America, Europe and Oceania. The company has strong technical force, sophisticated manufacturing equipment, professional production team, for product innovation, research and development, quality assurance provides a solid backing.

Certifications

FAQ

Q: What's the lead time for orders?
A: Standard models ship in 15–30 days; customized units require 30–45 days.
 
Q: What is your terms of delivery?
A: EXW, FOB, CFR, CIF, DDP.
 
Q: Can I request a customized Leaf Spring size?
A: Absolutely! We offer tailored attachments.
 
Q: What documents do you provide for export?
A: Full export package (Commercial Invoice, Packing List, Bill of Lading, COC, etc.).
 
Q: How do I place an order?
A: Contact us via email/phone for a quote, then confirm with a PO.
 
Q:How do you make our business long-term and good relationship?
1. We keep good quality and competitive price to ensure our customers benefit ;
2. We respect every customer as our friend and we sincerely do business and make friends with them, no matter where they come from.

Exhibition