A spoke is one of some number of rods radiating from the center of a wheel (the hub where the axle connects), connecting the hub with the round traction surface.
The term originally referred to portions of a log that had been split lengthwise into four or six sections. The radial members of a wagon wheel were made by carving a spoke (from a log) into their finished shape. A spokeshave is a tool originally developed for this purpose. Eventually, the term spoke was more commonly applied to the finished product of the wheelwright's work, than to the materials he used.
The spoked wheel was invented to allow the construction of lighter and swifter vehicles. The earliest known examples are in the context of the Andronovo culture, dating to ca. 2000 BC. Soon after this, horse cultures of the Caucasus region used horse-drawn spoked-wheel war chariots for the greater part of three centuries. They moved deep into the Greek peninsula where they joined with the existing Mediterranean peoples to give rise, eventually, to classical Greece after the breaking of Minoan dominance and consolidations led by pre-classical Sparta and Athens. Celtic chariots introduced an iron rim around the wheel in the 1st millennium BC. The spoked wheel was in continued use without major modification until the 1870s, when wire wheels and rubber tires were invented.
A spoke is a rod connecting the hub of a wheel with the traction surface.
Spoke or Spokes may also refer to:
Spoke is the 1996 debut album of Calexico, an Americana/indie rock band from Arizona. It was initially released in Germany (Hausmusik label) under the group name Spoke.
HAF 604 is the certification for components for nuclear power plants in China that have been manufactured outside of China. Exporters of these safety-relevant components need this certification for importing the components into China. The responsible authority for the certification of these components for nuclear power plants is the National Nuclear Safety Administration.
The regulations for the HAF 604 certification are the “Supervision and Management Regulations for Imported Civilian Nuclear Equipment” and determine safety requirements for these safety relevant components. Furthermore, it governs the administration for the certification applications from non-Chinese manufacturers regarding the construction, manufacturing as well as installation of safety-relevant components for nuclear power plants. The Regulation also defines the obligatory safety test requirements for the certification process.
HAF may refer to: Halfling, via Dungeons and Dragons