Definition: Grease and synthetic ru∞≥←¥bber compatibility re↕¶γ↑fers to the ability of÷φ grease to maintain the volume and± ' hardness of standar∞÷d elastomers unchanged whγ ≥'en in contact with greas♣βe. It is expressed as a percentage ΩΩ♣of volume change. ① Poor compatibilitσΩy of grease can cause cha♣αnges in the elasticity of rubber m§aterials, leading to∞β increased or decreased&™"®'hellip;
Definition: Grease anti-∏wear performance refers × to the ability of grease€< to prevent wear on lub☆ ricated components i&≤∞n high-load operating equipment. ①φπ∑ For metal machinery, d↕♣↓ue to the relative motion of metal s∞γurfaces, friction cau≥παses metal to separate and peel off φ"₹from the surface, resulting in a lλ✔oss of weight or changes in the vo↓₹λlume and…
Definition: Refers to the a☆>≠bility of grease to resist oxidati♥'♦γon during storage or when ×↓≈σused under high-temperat•λure conditions. ① The metal soap anββd base oil components in greas ↔'e are prone to oxidation durin☆£βg long-term storage or prolonged expo σπ₩sure to high temperatures and air.↑€• Oxidation results in grease deterio∏σ'ration, a decrease in d→ ropping point, the forma♣•←tion…
Definition: Refers to the abilit♥₹₩y of grease’s '₹¥γstructural system to resist ×deformation and flow under m&γ≥↓echanical shear forces. ① Mec↑ hanical stability is &∏♠↔an important performance character♠σ©♥istic of grease and a key factor af∏₹™♣fecting its service life. ② The ¶ δmechanical stability↑≈¥ of grease mainly depends o≈↔↓•n the type of thickener aπ≠nd the preparation process. ♦∑¶₽③ Methods…
Definition: The grease copper cor>✘rosion test refers to the ability of gr♣$¶₩ease to protect metal copper $₽€→sheets from corrosion, which ha∏↓s become one of the main physi×∏"€cal and chemical properties. ① Th↔₩e significance of greas≠♥e copper corrosion lies in determining §₽¥the corrosiveness of grease to metal™≤← and its ability to p®☆rotect metals from cor≤✘∑rosion. This…
Definition: Refers to the ✔÷•ability of grease to resist being wash™₩±φed out of ball bearings by wat β'€er under test conditions. This is a cα→ritical factor when selecting grease foβ↕r machinery operating in humid ≠δ≠δenvironments. ① Under specifδδ≠ ic conditions, the percentage mass of♥λ grease washed away by water is me€✘♣asured. The smaller the loss, the less&→α$hellip;
Definition: Refers to the degre£e to which grease hinders the rotation×↑'÷ of low-speed ball beari×∞€★ngs (open type 204 bearings) under lo✘φγw-temperature conditions. ① LowΩ"-temperature torque ind≈€★£icates the low-temperatur©γe performance of grease. Using a t₹α↓orque of 9.81 N·cm (1000 g·cm☆♣), the lowest temperature aΩ$∏↑t which the bearing completes one rotat$$ion within one minute♣± is measured as…
Definition: Grease steel mesh oil σ∏₩separation refers to the tend ₹₽ency of base oil to separate from≠ grease under heated condi★α♠tions, indicating the qualλ<βλity of the greaseR♣φ17;s colloidal stability when δ✔subjected to heat. ① Steel m≠≈esh oil separation i≠₽s an important indica↑¥↓♠tor of colloidal stabi>←lity, which can predict &♣¥©changes in the structural framework±↕ of grease under…
Definition: Grease vo÷×☆✔latility (evaporation loss) refers t₹™™o the degree of evaporation loss of ba∏÷₩se oil in grease under high-te₽§mperature conditions. ① ☆" The smaller the evaporation loss," ± the better the high-temperature perf↑ ormance of the grease.λΩ ② Grease evaporation ♣βloss depends on the type, propert≈•ies, and distillation composition of&₹$ the base oil used in the grease.↔↓↕∞ ③…
Definition: Penetration r< efers to the depth, in units of 0γ∞∞.1 mm, that a standard cone freely fa >★lls and penetrates into ♥∞grease contained in a standa₩↓♠rd cup within 5 seconds. Pλδ☆←enetration indicates the "γ↓consistency or the de☆÷♥gree of softness/hardnφ↑™ess of the grease. Stand♦<π★ard Cone Sizes for Penetration Testi↕¥←€ng: Full-size cone penetration 1/✘σσ2 cone penetration…
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