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An axlebox, also known as a journal box in North America, is the mechanical subassembly on each end of the axles under a railway wagon, coach or locomotive; it contains bearings and thus transfers the wagon, coach or locomotive weight to the wheels and rails; the bearing design is typically oil-bathed plain bearings on older rolling stock, or roller bearings on newer rolling stock.
The diagram, which is not to scale, is a composite of various designs in the late steam era. Some components shown are not the same as, or are not present, on some locomotives – for example, on smaller or articulated types.
7-pin ISO 1724 trailer connector type 12N (Towing vehicle side). This connector uses a mix of pin and socket terminals. Physical design according to standard ISO 1724. [4] [8] The 7-pin connector uses all 7 pins on newer trailers according to the ISO standard. [9] [10] On older trailers there's sometimes a 5-wire setup using a 7-pin connector.
Flat 5-pin connector (Towing vehicle side) This contact is not as common, but is compatible with the 4-pin connector in the way that a towing vehicle with this connector can be connected to a trailer with the 4-pin flat plug. The extra connection is often used to block the surge brakes when reversing with the trailer. #
1×6 pin header (one row) 1×6 female header (one row) A pin header (or simply, header) is a form of electrical connector. A male pin header consists of one or more rows of metal pins molded into a plastic base, often 2.54 mm (0.1 in) apart, though available in many spacings. [1] Male pin headers are cost-effective due to their simplicity.
A right-hand railroad switch with point indicator pointing to right Animated diagram of a right-hand railroad switch. Rail track A divides into two: track B (the straight track) and track C (the diverging track); note that the green line represents direction of travel only, the black lines represent fixed portions of track, and the red lines depict the moving components.
A remove before flight ribbon on Concorde landing gear A remove before flight keychain. Remove before flight is a safety warning often seen on removable aircraft and spacecraft components, typically in the form of a red ribbon, to indicate that a device, such as a protective cover or a pin to prevent the movement of mechanical parts, is only used when the aircraft is on the ground (parked or ...
A trailing-arm suspension, also referred to as trailing-link, is a form of vehicle suspension.In a motor vehicle it places one or more horizontal arms (or "links") perpendicular to and forward of the axle on the chassis or unibody, which are connected to the axle or wheels with pivot joint(s).