What does crosshairs expression mean? Definitions by the largest Idiom Dictionary. A crosshead is a mechanism used as part of the slider-crank linkages of long reciprocating engines and reciprocating compressors to eliminate sideways pressure on the piston. 1. a heading of a subsection printed within the body of the text 2. metal block that connects to a piston; it slides on parallel guides and moves a connecting rod back and forth Familiarity information: CROSSHEAD used as a noun is rare. Because of the very small bore-to-stroke ratio on such engines, the connecting rod would hit the cylinder walls and block the engine from rotating if the … Hi there! This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. Cross-bearing was a commonly used figure of the day, and stood for "doing a thing that was disagreeable to do, or bearing a thing that was painful to bear, because it was right. A crosshead is a block or bar between the piston and the connecting rod of an engine, that prevents the piston from moving from side to side and damaging the piston and cylinder. The cooling oil must be injected between shaft (crosshead pin) and lower bearing. The hand drawn sketch below shows a typical crosshead just in case you haven’t got the idea about the arrangement of the crosshead bearing. A device generally employed in wire coating which is attached to the discharge end of the extruder cylinder; designed to facilitate extruding material at an angle. The piston pin-bore bearing also acts as a form of journal bearing, so do the big-end bearings, covered in Chapters 19 and 20. Bearing shells are lined with a special kind of antifriction white metal that helps it to attain higher strength. n. A beam that connects the piston rod to the connecting rod of a reciprocating engine. Many translated example sentences containing "crosshead bearing" – German-English dictionary and search engine for German translations. How to use bearing in a sentence. Bearing metal worn out, steel-steel contact In addition to damaging the compon-ents, there is, in extreme cases, a risk of a crankcase explosion. Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content. BW: Bottom Width‐ how wide the bottom of the crosshead is from one side to the other TW: Top Width‐ how wide the top of the crosshead is from one side to the other H: Height‐ how tall the crosshead is from top to bottom P: Projection‐ how thick the breastplate of the crosshead is TP: Top Projection‐ how thick the top of the crosshead is Also, the crosshead enables the connecting rod to freely move outside the cylinder. A block sliding between guides and containing a wrist pin for the conversion of reciprocating to rotary motion, as in an engine or compressor. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. crosshairs phrase. formal definition. a sliding member of a reciprocating engine for keeping the motion of the joint between a piston rod and a connecting rod in a straight line. The crosshead is connected to the piston rod and crosshead bearing of the engine, which are guided up and down the lubricated guides. A block sliding between guides and containing a wrist pin for the conversion of reciprocating to rotary motion, as in an engine or compressor. Despite the fact that crossheads play a very important role in large engines, smaller engines — especially the internal combustion engines found in automobiles — do not employ them. A crosshead [1] is a mechanism used in large reciprocating engines and reciprocating compressors [2] to eliminate sideways pressure on the piston. Eccentric bored bearing & machining shell – Fiat Engines Large diameter stiff crosshead pins L/D ratio less (small con rod and crank throw ratio. All content on this website, including dictionary, thesaurus, literature, geography, and other reference data is for informational purposes only. Dictionary, Encyclopedia and Thesaurus - The Free Dictionary, the webmaster's page for free fun content. As great as crossheads look on a home's exterior, don't forget that you can use these decorative pieces inside, as well. At the rear of the crosshead is the cover plate for the wrist pin, which goes through the end of the main rod. Explanation of Crosshead bearing crosshead: Meaning and Definition of. The lube oil pump would be started to ensure a flow of oil from the bearing, and the engine turned on the turning gear to ensure that no restriction to movement is present. A runner or guide positioned just above a sinking bucket to restrict excessive swinging. Squeezing and cracking points toward … In MAN B&W engines, a set of channels have been machined in the lower crosshead bearing, in which the cooling oil can pass. Crosshead bearing synonyms, Crosshead bearing pronunciation, Crosshead bearing translation, English dictionary definition of Crosshead bearing. crosshead bearing design for K98 Mark 6 and 7, K90 Mark 6 and L90 Mark 6 engines. The hinge between the piston and connecting rod is placed outside the cylinder, in a large sliding bearing block called a crosshead . The crosshead bearing is difficult to lubricate effectively. Babbitt Bearing Resource. patents-wipo fr Un cadre (53) formant barrière est fixé à la première traverse (3) au-dessus d'une pédale (60) de frein pour bloquer l'accès d'un outil permettant la destruction dudit dispositif. Many translated example sentences containing "crosshead bearing" – Russian-English dictionary and search engine for Russian translations. Bearing definition is - the manner in which one behaves or comports oneself : the manner in which one bears oneself. Find definitions for: cross•head. The reason for the update is a number of incidents with fatigue cracks in the lin- en A barrier frame (53) is attached to the first crosshead (3) above a brake pedal (60) to block forcing tool access. Cross bearings definition is - compass bearings of two or more points taken simultaneously to fix a position (as of a ship). https://encyclopedia2.thefreedictionary.com/Crosshead+bearing. Together, they make a crosshead bearing. A beam that connects the piston rod to the connecting rod of a reciprocating engine. crosshead is listed in the World's largest and most authoritative dictionary database of … ... Crosshead bearing; Crosshead bearing; Crosshead Engine; crossheading; crossheading; Crosshole sonic logging; crossing; crossing; crossing; From left to right across the center of the picture are the piston shaft, the crosshead, and the main rod. The crosshead transmits the transverse forces to the crosshead guide. We promise we are the perfect company to manufacter or repair any babbitt bearing you need. Find out information about Crosshead bearing. Define Crosshead bearing. Usage On smaller engines the connecting rod links the piston and the crankshaft directly, but this transmits transverse forces to the piston, since the crankpin (and thus the direction the force is applied) moves from side to side with the rotary motion of the crank. (mechanical engineering) A block sliding between guides and containing a wrist pin for the conversion of reciprocating to rotary motion, as in an engine or compressor. In a piston engine, the main bearings are the bearings which hold the crankshaft in place and allow it to rotate within the engine block.. Main bearings are usually plain bearings or journal bearings, held in place by the engine block and bearing caps.The number of main bearings per engine varies between engines, often in accordance with the forces produced by the operation of the engine. A crosshead is a block or bar between the piston and the connecting rod of an engine, that prevents the piston from moving from side to side and damaging the piston and cylinder. Inspection of crosshead bearings As described in earlier service letters (SL87-219, SL90-272 and SL90-273), AlSn40-based crosshead bearings must urgently be replaced as soon as possible Once the bearing has been assembled, all crosshead clearances would be taken, checked with maker’s tolerances, and recorded. Assuming that the crosshead pin and piston rod assembly is resting on the support brackets bolted to the guides and that the conrod is swung down to crankcase door level inspect bearing half in con rod(the loaded half) for evidence of scoring, squeezing, wiping, cracking of bearing metal, scoring will indicate hard particles in LO or damage to crosshead pin. The hinge between the piston and connecting rod is placed outside the cylinder, in a large sliding bearing block called a crosshead . • Crosshead Pin Load:Same definition as “combined rod load.” Note this term is not defined within API-618, but is a commonly encountered industry term used to clarify the component at which the combined rod load calculations are being done. A crosshead bearing is only oscillating and the lower shell is always loaded. Dictionary entry overview: What does crosshead mean? A crosshead bearing (or simply crosshead) is used in large reciprocating engines, whether internal combustion engines or steam engines.On smaller engines the connecting rod links the piston and the crank directly, but this transmits transverse forces to the piston, since the crankpin (and thus the direction the force is applied) moves from side to side with the rotary motion of the crank. Synonym Discussion of bearing. crosshead - metal block that connects to a piston; it slides on parallel guides and moves a connecting rod back and forth block - a solid piece of something (usually having flat rectangular sides); "the pyramids were built with large stone blocks" Below is a list of crosshead bearing words - that is, words related to crosshead bearing. Pronunciation: (krôs'hed", kros'-), — n. a title or heading filling a line or group of lines the full width of the column. In that sort of sense Christ used it in our text. Journal bearings usually operate in a hydrodynamic regime of lubrication as the generated pressures are low compared with those experienced by ball and rolling element bearings, gears and cam–follower pairs. Christian duty, sometimes painful, involves crucifixion of self, sacrifice of natural feelings." https://www.thefreedictionary.com/Crosshead+bearing. Definition of crosshairs in the Idioms Dictionary. The design is updated in order to increase the safety margin against fatigue damage of the white metal lining of the bearings. This information should not be considered complete, up to date, and is not intended to be used in place of a visit, consultation, or advice of a legal, medical, or any other professional. • CROSSHEAD (noun) The noun CROSSHEAD has 2 senses:. We are BBR, the right choice for high-precison centrifugal-casted babbitt bearings.We have been manufacturing high-quality products for more than 20 years. Interior windows and doorways can benefit from the added definition and style that pilasters and a complementary crosshead can add, especially in a common room like a living room, dining room, or family room. Continuous full length bottoms half of crosshead bearing – MAN B & W, Sulzer Engines. Sacrifice of natural feelings. ) the noun crosshead has 2 senses: the connecting rod a! Picture are the piston shaft, the crosshead guide helps it to higher! 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