Trailer Axle 18 Wheeler Accident Lawyer

CDL-Licensed Truck Crash Lawyer.

18 Wheeler Accident Lawyer Reshard Alexander is licensed to drive big trucks and understands the cause when you are injured in a commercial motor vehicle wreck.


Trailer Axle 18 Wheeler Accident Lawyer

Seeking a Free Consultation with one of Texas’ 18 wheeler accident lawyers? Call the Big Rig Bull Texas Truck Accident Lawyer Reshard Alexander today at 713.766.3322.

18 wheeler accident lawyer Reshard Alexander is dedicated to holding professional truck drivers and trucking companies accountable for their negligence.

An axle is a central shaft for a rotating wheel or gear. On wheeled vehicles, the axle may be fixed to the wheels, rotating with them, or fixed to the vehicle, with the wheels rotating around the axle.[1] In the former case, bearings or bushings are provided at the mounting points where the axle is supported. In the latter case, a bearing or bushing sits inside a central hole in the wheel to allow the wheel or gear to rotate around the axle. Sometimes, especially on bicycles, the latter type axle is referred to as a spindle.


On cars and trucks, several senses of the word axle occur in casual usage, referring to the shaft itself, its housing, or simply any transverse pair of wheels. Strictly speaking, a shaft which rotates with the wheel, being either bolted or splined in fixed relation to it, is called an axle or axle shaft. However, in looser usage, an entire assembly including the surrounding axle housing (typically a casting) is also called an axle.

An even broader (somewhat figurative) sense of the word refers to every pair of parallel wheels on opposite sides of a vehicle, regardless of their mechanical connection to each other and to the vehicle frame or body. Thus, transverse pairs of wheels in an independent suspension may be called an axle in some contexts. This very loose definition of “axle” is often used in assessing toll roads or vehicle taxes, and is taken as a rough proxy for the overall weight-bearing capacity of a vehicle, and its potential for causing wear or damage to roadway surfaces.

Vehicle axles

Axles are an integral component of most practical wheeled vehicles. In a live-axle suspension system, the axles serve to transmit driving torque to the wheel, as well as to maintain the position of the wheels relative to each other and to the vehicle body. The axles in this system must also bear the weight of the vehicle plus any cargo. A non-driving axle, such as the front beam axle in heavy duty trucks and some two-wheel drive light trucks and vans, will have no shaft, and serves only as a suspension and steering component. Conversely, many front-wheel drive cars have a solid rear beam axle.

In other types of suspension systems, the axles serve only to transmit driving torque to the wheels; the position and angle of the wheel hubs is an independent function of the suspension system. This is typical of the independent suspensions found on most newer cars and SUVs, and on the front of many light trucks. These systems still have differentials, but will not have attached axle housing tubes. They may be attached to the vehicle frame or body, or integral in a transaxle. The axle shafts (usually constant-velocity type) then transmit driving torque to the wheels. Like a full floating axle system, the drive shafts in a front-wheel drive independent suspension system do not support any vehicle weight

Structural features and design

A straight axle is a single rigid shaft connecting a wheel on the left side of the vehicle to a wheel on the right side. The axis of rotation fixed by the axle is common to both wheels. Such a design can keep the wheel positions steady under heavy stress, and can therefore support heavy loads. Straight axles are used on trains (that is, locomotives and railway wagons), for the rear axles of commercial trucks, and on heavy duty off-road vehicles. The axle can optionally be protected and further reinforced by enclosing the length of the axle in a housing.

In split-axle designs, the wheel on each side is attached to a separate shaft. Modern passenger cars have split drive axles. In some designs, this allows independent suspension of the left and right wheels, and therefore a smoother ride. Even when the suspension is not independent, split axles permit the use of a differential, allowing the left and right drive wheels to be driven at different speeds as the automobile turns, improving traction and extending tire life.

A tandem axle is a group of two or more axles situated close together. Truck designs use such a configuration to provide a greater weight capacity than a single axle. Semi trailers usually have a tandem axle at the rear.

Axles are typically made from SAE grade 41xx steel or SAE grade 10xx steel. SAE grade 41xx steel is commonly known as “chrome-molybdenum steel” (or “chrome-moly”) while SAE grade 10xx steel is known as “carbon steel“. The primary differences between the two are that chrome-moly steel is significantly more resistant to bending or breaking, and is very difficult to weld with tools normally found outside a professional welding shop.[2]

Drive axle 18 Wheeler Accident Lawyer

An axle that is driven by the engine or prime mover is called a drive axle.

Modern front-wheel drive cars typically combine the transmission (gearbox and differential) and front axle into a single unit called a transaxle. The drive axle is a split axle with a differential and universal joints between the two half axles. Each half axle connects to the wheel by use of a constant velocity (CV) joint which allows the wheel assembly to move freely vertically as well as to pivot when making turns.

In rear-wheel drive cars and trucks, the engine turns a driveshaft (also called a propellor shaft or tailshaft) which transmits rotational force to a drive axle at the rear of the vehicle. The drive axle may be a live axle, but modern rear wheel drive automobiles generally use a split axle with a differential. In this case, one half-axle or half-shaft connects the differential with the left rear wheel, a second half-shaft does the same with the right rear wheel; thus the two half-axles and the differential constitute the rear axle.

Some simple vehicle designs, such as leisure go-karts, may have a single driven wheel where the drive axle is a split axle with only one of the two shafts driven by the engine, or else have both wheels connected to one shaft without a differential (kart racing). However, other go-karts have two rear drive wheels too.

Dead axle (lazy axle)

A dead axle, also called a lazy axle, is not part of the drivetrain, but is instead free-rotating. The rear axle of a front-wheel drive car is usually a dead axle. Many trucks and trailers use dead axles for strictly load-bearing purposes. A dead axle located immediately in front of a drive axle is called a pusher axle. A tag axle is a dead axle situated behind a drive axle. Dead axles are also found on semi trailers, farm equipment, and certain heavy construction machinery serving the same function. On some vehicles (such as motorcoaches), the tag axle may be steerable. In some designs the wheels on a lazy axle only come into contact with ground when the load is significant, thus saving unnecessary tire wear.

Lift axle

Dump truck with an airlift pusher axle, shown in the raised position

Some dump trucks and trailers may be configured with a lift axle (also known as an airlift axle or drop axle), which may be mechanically raised or lowered. The axle is lowered to increase the weight capacity, or to distribute the weight of the cargo over more wheels, for example to cross a weight-restricted bridge. When not needed, the axle is lifted off the ground to save wear on the tires and axle, and to increase traction in the remaining wheels. Lifting an axle also alleviates lateral scrubbing of the additional axle in very tight turns, allowing the vehicle to turn more readily. In some situations, removal of pressure from the additional axle is necessary for the vehicle to complete a turn at all.[3]

Several manufacturers offer computer-controlled airlift, so that the dead axles are automatically lowered when the main axle reaches its weight limit. The dead axles can still be lifted by the press of a button if needed, for better maneuverability.

Lift axles were in use in the early 1940s. Initially, the axle was lifted by a mechanical device. Soon hydraulics replaced the mechanical lift system. One of the early manufacturers was Zetterbergs, located in Östervåla, Sweden. Their brand was Zeta-lyften.

The liftable tandem drive axle was invented in 1957 by the Finnish truck manufacturer Vanajan Autotehdas, a company sharing history with Sisu Auto.

Full-floating vs semi-floating

A full-floating axle carries the vehicle’s weight on the axle casing, not the halfshafts; they serve only to transmit torque from the differential to the wheels. They “float” inside an assembly that carries the vehicle’s weight. Thus the only stress it must endure is torque (not lateral bending force). Full-floating axle shafts are retained by a flange bolted to the hub, while the hub and bearings are retained on the spindle by a large nut. In contrast, a semi-floating design carries the weight of the vehicle on the axle shaft itself; there is a single bearing at the end of the axle housing that carries the load from the axle and that the axle rotates through.

The full-floating design is typically used in most 3/4- and 1-ton light trucks, medium duty trucks and heavy-duty trucks, as well as most agricultural applications, such as large tractors and self-propelled agricultural machinery. There are a few exceptions, such as many Land-Rover vehicles and in American stock car racing since the early 1960s. The overall assembly can carry more weight than a semi-floating or non-floating axle assembly, because the hubs have two bearings riding on a fixed spindle. A full-floating axle can be identified by a protruding hub to which the axle shaft flange is bolted.

The semi-floating axle setup is commonly used on half-ton and lighter 4×4 trucks in the rear. This setup allows the axle shaft to be the means of propulsion, and also support the weight of the vehicle. The main difference between the full- and semi-floating axle setups is the number of bearings. The semi-floating axle features only one bearing, while the full-floating assembly has bearings in both the inside and outside of the wheel hub. The other difference is about the axle removal. To remove the semi-floating axle, one has to remove a wheel first. And, if such axle breaks, the wheel is most likely to come off the vehicle. The semi-floating design is found under most 1/2-ton and lighter trucks and SUVs and rear-wheel-drive passenger cars, usually being smaller or less expensive models.

A benefit of a full-floating axle is that even if an axle shaft (used to transmit torque or power) breaks, the wheel will not come off, preventing serious accidents.

There are an estimated 500,000 truck accidents in the U.S. each year. Nearly 5,000 of these result in fatalities. The remainder often results in injuries of varying degrees. With four major interstates running through Houston — I-45, I-10, US-290, and I-69 — Texans see more than their fair share of trucking accidents. Unfortunately, many of these accidents are caused by the negligence of truck drivers or trucking companies.

Seeking a Free Consultation with one of Texas’ 18 Wheeler accident lawyers? Call the Big Rig Bull Texas Truck Accident Lawyer Reshard Alexander today at 713.766.3322.

A lot of professional truck drivers work for big motor carrier companies who have law firms ready to fight the moment a driver is involved in a truck wreck. It isn’t unusual for a representative (safety director) of their company to arrive on the scene of an accident to solicit signatures from the injured parties to decrease their liability. If you’re involved in an accident with a large truck, then it is important to keep in mind that you shouldn’t sign anything placed in front of you from the professional driver, the driver’s employer or the insurer of the driver. In the event that you or a loved one was hurt in a collision between a large truck, you want an experienced truck accident attorney that will fight for you.

18 wheeler accident lawyer Reshard Alexander understands exactly what it takes to fight the legal teams of big trucking firms. I help families and their loved ones in a dire time of need. Time is of the essence in these kinds of cases, therefore it is important to call a lawyer versed in this area of law immediately.  It is best to consult an experienced Houston truck accident attorney to get help in seeking the claim. Call 18 wheeler accident lawyer Reshard Alexander to request a free case evaluation.

Trailer Axle 18 Wheeler Accident Lawyers

Seeking a Free Consultation with one of Texas’ 18 Wheeler Accident Lawyers? Call the Big Rig Bull Texas Truck Accident Lawyer Reshard Alexander today at 713.766.3322.

It is advisable to consult 18 wheeler accident attorney Reshard Alexander who will help determine liability and the right compensation amount that you should get for your injuries. The insurance company of the at-fault driver may not be willing to pay for damages and I can help you with the negotiation process. Call me today at (713) 766-3322 for a free consultation.

Houston Truck Accident & Injury Guide

Types of Truck
18 Wheeler
Agricultural Hauler
Auto Hauler
Box Truck
Bulk Hopper
Cattle Truck
Cement Mixer
Delivery Truck
Dry Van
Dump Truck
Flatbed Truck
Garbage Truck
Grain Hauler
Gravel Truck
Heavy Hauler
Hotshot Truck
Intermodal Truck
Logger Truck
LTL Truck
Milk Hauler
Mobile Crane
Oilfield Truck
Refrigerator Truck
Semi-Trailer Truck
Tanker Truck
Tow Truck

Components of an 18 Wheeler
Air Brakes
Drive Shaft
Fuel Tank
Head Lights
Landing Gear
Sleeper Berth
Tail Lights
Trailer Axles
Trailer Brakes
Vehicle Maintenance

Attorney Reshard AlexanderBig Rig Bull Texas Truck Accident Lawyer represents clients in all Texas counties, including: Anderson, Andrews, Angelina, Aransas, Archer, Armstrong, Atascosa, Austin, Bailey, Bandera, Bastrop, Baylor, Bee, Bell, Bexar, Blanco, Borden, Bosque, Bowie, Brazoria, Brazos, Brewster, Briscoe, Brooks, Brown, Burleson, Burnet, Caldwell, Calhoun, Callahan, Cameron, Camp, Carson, Cass, Castro, Chambers, Cherokee,Childress, Clay, Cochran, Coke, Coleman, Collin, Collingsworth, Colorado, Comal, Comanche, Concho, Cooke, Coryell, Cottle, Crane, Crockett, Crosby, Culberson, Dallam, Dallas, Dawson, Deaf Smith, Delta, Denton, DeWitt, Dickens, Dimmit, Donley, Duval, Eastland, Ector, Edwards, El Paso, Ellis, Erath, Falls, Fannin, Fayette, Fisher, Floyd, Foard, Fort Bend, Franklin, Freestone, Frio, Gaines, Galveston, Garza, Gillespie, Glasscock, Goliad, Gonzales, Gray, Grayson, Gregg, Grimes, Guadalupe, Hale, Hall, Hamilton, Hansford, Hardeman, Hardin, Harris County Truck Accident Lawyer, Harrison, Hartley, Haskell, Hays, Hemphill, Henderson, Hidalgo, Hill, Hockley, Hood, Hopkins, Houston, Howard, Hudspeth, Hunt, Hutchinson, Irion, Jack, Jackson, Jasper, Jeff Davis, Jefferson, Jim Hogg, Jim Wells, Johnson, Jones, Karnes, Kaufman, Kendall, Kenedy, Kent, Kerr, Kimble, King, Kinney, Kleberg, Knox, La Salle, Lamar, Lamb, Lampasas, Lavaca, Lee, Leon, Liberty, Limestone, Lipscomb, Live Oak, Llano, Loving, Lubbock, Lynn, Madison, Marion, Martin, Mason, Matagorda, Maverick, McCulloch, McLennan, McMullen, Medina, Menard, Milam, Mills, Mitchell, Montague, Montgomery, Moore, Morris, Motley, Nacogdoches, Navarro, Newton, Nolan, Nueces, Ochiltree, Oldham, Orange, Palo Pinto, Panola, Parker, Parmer, Pecos, Polk, Potter, Presidio, Rains, Randall, Reagan, Real, Red River, Reeves, Refugio, Roberts, Robertson, Rockwall, Runnels, Rusk, Sabine, San Augustine, San Jacinto, San Patricio, San Saba, Schleicher, Scurry, Shackelford, Shelby, Sherman, Smith, Somervell, Starr, Stephens, Sterling, Stonewall, Sutton, Swisher, Tarrant, Taylor, Terrell, Terry, Throckmorton, Titus, Tom Green, Travis, Trinity, Tyler, Upshur, Upton, Uvalde, Val Verde, Van Zandt, Victoria, Walker, Waller, Ward, Washington, Webb, Wharton, Wheeler, Wichita, Wilbarger, Willacy, Williamson, Wilson, Winkler, Wise, Wood, Yoakum, Young, Zapata, and Zavala counties; 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