View 3 Hour Detailed Portland Weather Forecast for Today. Portland 4 â 7 Day Weather Forecast Summary: Heavy rain (total 37mm), heaviest during Mon afternoon. Warm (max 24Â°C on Mon afternoon, min 14Â°C on Tue night). Winds decreasing (fresh winds from the SSE on Sun night, light winds from the N by Mon afternoon).
noun, plural: spindles. (1) A collection of minute fibers composed of microtubules, which are prominent during cell division, as mitotic spindle or mitotic apparatus''. (2) A specialized innervated muscle structure involved in the reflex action and in proprioception, as muscle spindle. (3) A species of a poisonous shrub or small tree of the genus Euonymus, originally used for making spindles used for spinning wool. (4) An EEG waveform that occurs during sleep, as sleep spindle.
On a trailer, the spindles are located at the very ends of the axles and they definitely do serve a purpose. When you're towing, spindles are the part of the trailer axle assembly that the wheel hubs (and wheels) rotate around. Trailer spindles provide a surface for the inner and outer wheel bearings to roll on -- or rather, to roll around. The inner and outer wheel bearings keep the wheel hub and the spindle from actually contacting one another. In other words, the spindles are literally at the center of it all.