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Grease fitting on a bearing A grease nipple on the driver's door of a 1956 VW Beetle. A grease fitting, grease nipple, Zerk fitting, grease zerk, Alemite fitting, or divit is a metal fitting used in mechanical systems to feed lubricants, usually lubricating grease, into a bearing under moderate to high pressure using a grease gun.
A gland is a general type of stuffing box, used to seal a rotating or reciprocating shaft against a fluid. The most common example is in the head of a tap where the gland is usually packed with string which has been soaked in tallow or similar grease. The gland nut allows the packing material to be compressed to form a watertight seal and ...
The Roscoe type lubricator improved the situation by providing a valve with which to regulate the flow of steam and hence lubricant. Setting the valve correctly required experience and depended on the speed of the train. [2] The Roscoe lubricator was invented by James Roscoe in 1862 and patented in British Patent 1337. It incorporated two ...
Zone valves can also be constructed using wax motors and a spring-return mechanism. In this case, the valve is normally closed by the force of the spring but can be opened by the force of the wax motor. Removal of electrical power re-closes the valve. This style of zone valve operates with a perfectly ordinary SPST thermostat.
GA, GB and GC: wheel-bearings (suitability up to mild, moderate and severe duty respectively) A given performance category may include greases of different consistencies. [11] The measure of the consistency of grease is commonly expressed by its NLGI consistency number.
A main bearing is a bearing in a piston engine which holds the crankshaft in place and allows it to rotate within the engine block. The number of main bearings per engine varies between engines, often in accordance with the forces produced by the operation of the engine.
In 1998, [8] [9] AutoZone acquired ADAP Inc, who had stores under the ADAP Discount Auto Parts and Auto Palace nameplates respectively, [10] both being auto parts chains in the northeastern United States with 112 stores, [11] [12] TruckPro L.P., a chain with 43 stores in 14 states, and the 560-store Chief Auto Parts Inc., a chain with a ...
A Kingston valve is a type of valve fitted in the bottom of a ship's plating [1] that connects the sea to the ship's piping and storage tanks. A Kingston valve is a type of seacock . [ 1 ] It is arranged so that, under normal operating conditions, sea pressure keeps the valve closed. [ 2 ]