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In machine tools, a spindle is a rotating axis of the machine, which often has a shaft at its heart. The shaft itself is called a spindle, but also, in shop-floor practice, the word often is used metonymically to refer to the entire rotary unit, including not only the shaft itself, but its bearings and anything attached to it ( chuck , etc.).
In an automobile, the wheel spindle, sometimes called simply the spindle, is the part of the suspension system that carries the hub for the wheel and attaches to the upper and lower control arms. Spindles are carried by steering knuckles or "uprights". [ 1 ]
The spindle apparatus is vaguely ellipsoid in cross section and tapers at the ends. In the wide middle portion, known as the spindle midzone, antiparallel microtubules are bundled by kinesins. At the pointed ends, known as spindle poles, microtubules are nucleated by the centrosomes in most animal cells.
The terms spindle and hub are sometimes used interchangeably with steering knuckle, but refer to different parts. The wheel and tire assembly attach to the hub or spindle of the knuckle where the tire/wheel rotates while being held in a stable plane of motion by the knuckle/suspension assembly.
Spindle apparatus or mitotic spindle, a cellular structure in cell biology; Muscle spindle, stretch receptors within the body of a muscle; Spindle neuron, a specific class of neuron; Sleep spindle, bursts of neural oscillatory activity during sleep; Spindle transfer, an in vitro fertilization the technique
Spindle with cotton yarn, without whorl, representing the "spindle-shape". A modern Turkish spindle is an example of a low-whorl suspended spindle where the whorl is made up of interlocking arms. Here the cop is wound around the arms to form a ball. Spinning with a suspended spindle (below) and distaff (above).
The Japanese spindle plant and golden euonymus can be propagated with cuttings taken in the summer months. Dip the cuttings in rooting hormone containing indole-3-butyric acid (IBA), stick them in ...
The spindle speed is the rotational frequency of the spindle of the machine, measured in revolutions per minute (RPM). The preferred speed is determined by working backward from the desired surface speed (sfm or m/min) and incorporating the diameter (of workpiece or cutter).