Engineered Gasketing Products

Gasket Design TipsProblem Result Suggested SolutionsBolt holes close to edgeCauses breakage in strippingand assemblingProjection or "ear"Notch instead of holeVery small bolt holes ornon-circular openingsRequire handpicking…easy to missAvoid hole sizes under 3/32"diameter. If small hole is for locatingor indexing, change to notch.Tear-away parts with open slotsat attached edgesSlots require handpicking,costly dies and diemaintenanceSimple perforationThin walls, delicate cross-sectionin relation to overall sizeHigh scrap loss; stretching ordistortion in shipment or use.Restricts choice to high tensilestrength materialsHave the gasket in mind duringearly design stagesMetalworking tolerances appliedto gasket thickness, diameters,length, width, etc.±.0022.000Transference of fillets, radii, etc.from mating metal parts to gasketLarge gaskets made in sectionswith beveled jointsResults in perfectly usableparts being rejected at incominginspection. Requires timeand correspondence to reachagreement on practical limits.Increases cost of parts and tooling.Delays delivery.Unless part is molded, suchfeatures mean extra operationsand higher costExtra operations to skive orglue. Difficult to obtain smooth,even joints without steps ortransverse grooves.Most gasket materials are compressible.Many are affected byhumidity changes.Try standard or commercialtolerances before concluding thatspecial accuracy is required.Most gasket stocks will conformto mating parts without pre-shaping.Be sure radii, chamfers, etc.,are functional, not merely copiedfrom metal members.Die-cut dovetailed jointC-48