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What are the main types of gaskets?

What are the main types of gaskets?

  • Categories:Industry news
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  • Time of issue:2021-10-14
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(Summary description)Whatarethemaintypesofgaskets?1.FlatwasherThemainfunctionofflatwashersistodistributebearingsurfacepressure,clampingload,boltsornutsonalargersurfaceareatopreventdamage.Washersaremainlymanufacturedinaccordancewithstandardspecificationsofvarioussizes,materialsandshapes.Flatwashersarethinandflatroundgeneralpurposewasherswithaholeinthemiddle.Theinnerandoutershapesareusuallycircular.Dependingonthefunctionofthegasket,theholeorouterdiametercanbeasymmetrical.Theflatwashersizeisrepresentedbytheshankdiameterofthefastener,wheretheyformpartoftheassembly.2.SquarewashersSquarewashersforconstructionshouldbeusedinsteadofroundwashersfortimberconstructionandconcretefloorapplications;theyareusedwithallfastenersforgreaterloaddistributionandboltingthroughwallsortimber.3.SquareholewasherUsedinwoodworkingandfenceindustriestocombinewheelboltsandbodyscrewswithasquaresectionbelowthebolthead;thewasherislocatedonthesquarebelowthebolthead.4.ConicalwashersTheconicalwasherisdesignedtobeusedinthechannelpart,underthenutwithaconicalflange,sothattheboltassemblycanfitsquarelywhentightened.5.SpringwashersCoilspringwashersprovideanti-vibrationfunction,theyareseparatedbyaringontheringandbentintoaspiralshape,whichmakesthewasherexertanelasticforcebetweentheheadofthefastenerandthebearingsurface,keepingthewasherhardagainstthefaceandtighteningtheboltNutsorthreadedholesproducegreaterfrictionandrotationresistance.Thespringwasherisaleft-handedscrew,allowingthethreadtobetightenedclockwiseintherighthand.Whenaleftrotationmovementisapplied,theraisededgebitesintotheundersideoftheboltornutandthepartfixedtothebolttoresistrotation.Thespringwasherisnoteffectiveforleft-handedthreadsandhardenedsurfaces,andshouldnotbeusedinconjunctionwiththeflatwasherunderthespringwasher,becausethispreventsthespringwasherfrombitingintopartsthatcanresistrotation.Springwashersareproducedinaccordancewithvariousstandards,indicatingthicknessandcross-sectionaldimensions,usuallysquareorrectangularcross-sections.Thepopularspringwashersaresinglecoils,buttheycanalsobeprovidedasdoublecoilwashers.6.RibbedcontactlockwasherWasherswithsurfaceribsandserrationsononeortwoflatsurfacesaredesignedtoengageconnectingmaterialsorboltsornutstochangeelectricalcontactorlockingaction.Anytypeofmaterialthatcanbestamped,pressedorcutcanbemadeintoflatwashers.Washersaremadeofvariousmetalandnon-metalmaterials,includinglowcarbonsteelandhighcarbonsteel,stainlesssteelandsteelalloys,copper-basedmaterials,berylliumcopper,phosphorbronze,titanium,aluminum,fiber,mica,polyesterfilm,rubber,Nylon,PTFEandphenolicresin.Thegasketmaterialisimportantbecausecertainapplicationsrequirespecificmaterialstoensurethatthegasketcanwithstandenvironmentalconditions.Forexample,ifthewasherundergoescyclicloading,strengthisanimportantdesigncriterion,andhigh-alloysteelorspringsteelisrequiredinthecaseofspringsanddiscwashers.Whenthegasketbearsalightloadorasoftsurfacethatmaybedamagedbyametalgasket,usenon-metallicmaterials,etc.

What are the main types of gaskets?

(Summary description)Whatarethemaintypesofgaskets?1.FlatwasherThemainfunctionofflatwashersistodistributebearingsurfacepressure,clampingload,boltsornutsonalargersurfaceareatopreventdamage.Washersaremainlymanufacturedinaccordancewithstandardspecificationsofvarioussizes,materialsandshapes.Flatwashersarethinandflatroundgeneralpurposewasherswithaholeinthemiddle.Theinnerandoutershapesareusuallycircular.Dependingonthefunctionofthegasket,theholeorouterdiametercanbeasymmetrical.Theflatwashersizeisrepresentedbytheshankdiameterofthefastener,wheretheyformpartoftheassembly.2.SquarewashersSquarewashersforconstructionshouldbeusedinsteadofroundwashersfortimberconstructionandconcretefloorapplications;theyareusedwithallfastenersforgreaterloaddistributionandboltingthroughwallsortimber.3.SquareholewasherUsedinwoodworkingandfenceindustriestocombinewheelboltsandbodyscrewswithasquaresectionbelowthebolthead;thewasherislocatedonthesquarebelowthebolthead.4.ConicalwashersTheconicalwasherisdesignedtobeusedinthechannelpart,underthenutwithaconicalflange,sothattheboltassemblycanfitsquarelywhentightened.5.SpringwashersCoilspringwashersprovideanti-vibrationfunction,theyareseparatedbyaringontheringandbentintoaspiralshape,whichmakesthewasherexertanelasticforcebetweentheheadofthefastenerandthebearingsurface,keepingthewasherhardagainstthefaceandtighteningtheboltNutsorthreadedholesproducegreaterfrictionandrotationresistance.Thespringwasherisaleft-handedscrew,allowingthethreadtobetightenedclockwiseintherighthand.Whenaleftrotationmovementisapplied,theraisededgebitesintotheundersideoftheboltornutandthepartfixedtothebolttoresistrotation.Thespringwasherisnoteffectiveforleft-handedthreadsandhardenedsurfaces,andshouldnotbeusedinconjunctionwiththeflatwasherunderthespringwasher,becausethispreventsthespringwasherfrombitingintopartsthatcanresistrotation.Springwashersareproducedinaccordancewithvariousstandards,indicatingthicknessandcross-sectionaldimensions,usuallysquareorrectangularcross-sections.Thepopularspringwashersaresinglecoils,buttheycanalsobeprovidedasdoublecoilwashers.6.RibbedcontactlockwasherWasherswithsurfaceribsandserrationsononeortwoflatsurfacesaredesignedtoengageconnectingmaterialsorboltsornutstochangeelectricalcontactorlockingaction.Anytypeofmaterialthatcanbestamped,pressedorcutcanbemadeintoflatwashers.Washersaremadeofvariousmetalandnon-metalmaterials,includinglowcarbonsteelandhighcarbonsteel,stainlesssteelandsteelalloys,copper-basedmaterials,berylliumcopper,phosphorbronze,titanium,aluminum,fiber,mica,polyesterfilm,rubber,Nylon,PTFEandphenolicresin.Thegasketmaterialisimportantbecausecertainapplicationsrequirespecificmaterialstoensurethatthegasketcanwithstandenvironmentalconditions.Forexample,ifthewasherundergoescyclicloading,strengthisanimportantdesigncriterion,andhigh-alloysteelorspringsteelisrequiredinthecaseofspringsanddiscwashers.Whenthegasketbearsalightloadorasoftsurfacethatmaybedamagedbyametalgasket,usenon-metallicmaterials,etc.

  • Categories:Industry news
  • Author:
  • Origin:
  • Time of issue:2021-10-14
  • Views:0
Information

What are the main types of gaskets?

1. Flat washer

The main function of flat washers is to distribute bearing surface pressure, clamping load, bolts or nuts on a larger surface area to prevent damage.

Washers are mainly manufactured in accordance with standard specifications of various sizes, materials and shapes. Flat washers are thin and flat round general purpose washers with a hole in the middle. The inner and outer shapes are usually circular. Depending on the function of the gasket, the hole or outer diameter can be asymmetrical. The flat washer size is represented by the shank diameter of the fastener, where they form part of the assembly.

2. Square washers

Square washers for construction should be used instead of round washers for timber construction and concrete floor applications; they are used with all fasteners for greater load distribution and bolting through walls or timber.

3. Square hole washer

Used in woodworking and fence industries to combine wheel bolts and body screws with a square section below the bolt head; the washer is located on the square below the bolt head.

4. Conical washers

The conical washer is designed to be used in the channel part, under the nut with a conical flange, so that the bolt assembly can fit squarely when tightened.

5. Spring washers

Coil spring washers provide anti-vibration function, they are separated by a ring on the ring and bent into a spiral shape, which makes the washer exert an elastic force between the head of the fastener and the bearing surface, keeping the washer hard against the face and tightening the bolt Nuts or threaded holes produce greater friction and rotation resistance. The spring washer is a left-handed screw, allowing the thread to be tightened clockwise in the right hand. When a left rotation movement is applied, the raised edge bites into the underside of the bolt or nut and the part fixed to the bolt to resist rotation. The spring washer is not effective for left-handed threads and hardened surfaces, and should not be used in conjunction with the flat washer under the spring washer, because this prevents the spring washer from biting into parts that can resist rotation. Spring washers are produced in accordance with various standards, indicating thickness and cross-sectional dimensions, usually square or rectangular cross-sections. The popular spring washers are single coils, but they can also be provided as double coil washers.

6. Ribbed contact lock washer

Washers with surface ribs and serrations on one or two flat surfaces are designed to engage connecting materials or bolts or nuts to change electrical contact or locking action.

Any type of material that can be stamped, pressed or cut can be made into flat washers. Washers are made of various metal and non-metal materials, including low carbon steel and high carbon steel, stainless steel and steel alloys, copper-based materials, beryllium copper, phosphor bronze, titanium, aluminum, fiber, mica, polyester film, rubber, Nylon, PTFE and phenolic resin.

The gasket material is important because certain applications require specific materials to ensure that the gasket can withstand environmental conditions. For example, if the washer undergoes cyclic loading, strength is an important design criterion, and high-alloy steel or spring steel is required in the case of springs and disc washers. When the gasket bears a light load or a soft surface that may be damaged by a metal gasket, use non-metallic materials, etc.

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