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Originally called a laminated or carriage spring, and sometimes referred to as a semi-elliptical spring, elliptical spring, or cart spring, it is one of the oldest forms of vehicle suspension. A leaf spring is one or more narrow, arc-shaped, thin plates that are attached to the axle and chassis in a way that allows the leaf spring to flex ...
JAI (Jamna Auto Industries Limited) is an Indian multinational suspension system automotive company headquartered in Delhi, India.JAI produces various types of springs, including tapered or multileaf, parabolic spring, lift axle suspension, and air suspension systems.
A ladder frame with three beam axles, the front on leaf springs, the rear tandem on leaf springs with locating arms, was used. The M939 series uses 11:00 R20 tires with two tires per side per axle in the rear (rear tandem duals). This allows a heavy load to be carried on improved roads and most US trucks in the past have used them.
A ladder frame with beam axles is used. There is a single front axle on semi-elliptical leaf springs. The base rear suspension is a Mack tandem with two powered axles, a single rear drive axle with an undriven pusher axle is available. Wheelbases are from 174 to 203 inches (440 to 520 cm) A set-back front axle is used.
A multi-leaf spring consists of a series of flat plates, usually of semi-elliptical shape. The flat plates are called leaves of the spring. The leaf at the top has maximum length. The length gradually decreases from the top leaf to the bottom leaf. The longest leaf at the top is called master leaf. It is bent at both ends to form the spring eyes.
The M809 series had a ladder frame with three live axles, the front on leaf springs and the rear tandem on leaf springs with locating arms. [7] There were three wheelbases (measurements are from the centerline of the front axle to the centerline of rear tandem). The short (M810), used for tractors and dumps, was 167 inches (4.24 m), the ...
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