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 its surroundings, with the wheels rotating around the axle. 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 the hole in the wheel to allow the wheel or gear to rotate around the axle. Sometimes, especially on bicycles, the latter type is referred to as a spindle.

On cars and trucks, several senses of the word "Tandem axle" co-occur in casual usage, referring to the shaft itself, its housing, or simply any transverse pair of wheels. The shaft itself rotates with the wheel, being either bolted or splined in fixed relation to it, and is called an "axle" or "axle shaft". However, it is equally true that the housing around it (typically a casting) is also called an "axle" (or "axle housing"). An even broader (somewhat figurative) sense of the word refers to every transverse pair of wheels, whether they are connected to each other or not. Thus even transverse pairs of wheels in an independent suspension are usually called "an axle".

Read more about Axle:  Vehicle Axles

Other articles related to "axle, axles":

Luttermöller Axle
... Steam locomotives with several axles or wheelsets connected to one another by coupling rods are not able to negotiate tight curves well ... Luttermöller, built the axle system named after him ... crankshaft journals on the outside of the wheels, but by cogwheels located in the centre of the axles ...
List Of Preserved Steam Locomotives In Germany - Locomotives That Can Be Grouped Into The Classification Scheme - Class 93 - Class 93.5-12
... Prussian T 14.1s were goods train tank engines with a 1'D1' axle arrangement, which had a higher axle load on the rear carrying axle compared with the T14 ...
Saxon VIb V - Technical Features
... Its two-cylinder, compound engine was located behind the carrying axle and drove the final axle ... dome was in the centre of the boiler over the middle axle ... The running gear had an improved Nowotny carrying axle, nevertheless it did not have good riding qualities ...
Adams Axle
... The Adams axle is a form of radial axle for rail locomotives that enable them to negotiate curves more easily ... The invention uses axle boxes that slide on an arc in shaped horn blocks, so allowing the axle to slide out to either side ...
Vehicle Axles - Full-floating Vs Semi-floating - Semi-floating
... The 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 ...

Famous quotes containing the word axle:

    The Star that bids the Shepherd fold,
    Now the top of Heav’n doth hold,
    And the gilded Car of Day,
    His glowing Axle doth allay
    In the steep Atlantick stream,
    John Milton (1608–1674)