Definition: Grease and synthet< ¥ic rubber compatibility refersα to the ability of gre↕•≠×ase to maintain the volume and hard÷$←ness of standard elastomers u↑♦nchanged when in contact " ™with grease. It is expre✔>ssed as a percentage of volume chang'÷ e. ① Poor compatibilit♥¶λ>y of grease can cause σ★γchanges in the elasticity ∞™×of rubber materials, lead♥<♣ing to increased or decreased…
Definition: Grease anti-wea£$r performance refers to₹→ the ability of grease to ←✘prevent wear on lubricated compo¶≈σnents in high-load operating eqδ←∞'uipment. ① For metal m ÷achinery, due to the reα §lative motion of met★£♦al surfaces, friction causes δσmetal to separate and peel off from the₹™ surface, resulting in a l$δoss of weight or changes in t <he volume and…
Definition: Refers to the ability ₩δ∏of grease to resist ox§σidation during storage&λ← or when used under high-temperature co$☆Ω§nditions. ① The metal soap and base oi ©☆♦l components in grease are prone ®®∑®to oxidation during long-term storag ≠♥e or prolonged exposure to '™♠high temperatures and air. Oxidation results in grease deteriora∑♥tion, a decrease in dropping point,Ω₹$ the formation…
Definition: Refers to t¥≈δhe ability of grease’s structura↔'l system to resist deformation and ✔≠αδflow under mechanical shear ∏∞forces. ① Mechanical stability i'★₹®s an important performance charac¶↕λteristic of grease andε a key factor affectiΩ±ε↓ng its service life. ② The mechanica↕α♣l stability of grease mainly d™φ> epends on the type of thicke♣∞ner and the preparati♥₩©on process. ③ Methods&helli♥p;
Definition: The grease copper corrosπ ₩ ion test refers to the abiliφ₽$ty of grease to protect metal co↓'σpper sheets from corrosion, which₩✘>↕ has become one of the ma→₩&in physical and chemical pro≠♣×perties. ① The significance of g¶$rease copper corrosion lies in de≥λtermining the corrosivene↕€β>ss of grease to metal and its a→↕bility to protect metals from∞™↑& corrosion. This…
Definition: Refers to t&σ↓¥he ability of grease to r¥ esist being washed out of ba®ll bearings by water under test cα™♠λonditions. This is a critical©≤→¶ factor when selecting grease for>₩←♥ machinery operating§π in humid environmen↑±£ts. ① Under specific condit↕€ions, the percentage mass of grease w$ ×ashed away by water i§☆×s measured. The smaller the loss, th ≠↔e less…
Definition: Refers toλφ the degree to which grea₩πse hinders the rotation of low-speed b→✘₩all bearings (open type 204 beari∞∞§→ngs) under low-temperature conditions₽↓. ① Low-temperature torq© ue indicates the low-tempera≤∑ture performance of grease. Usingσ'>↓ a torque of 9.81 N·cm (1000 g·cm), th¥§e lowest temperature at w®Ωhich the bearing completes ×★₹one rotation within one min>≠φute is measured as…
Definition: Grease steel mesh oi★↓☆l separation refers to the tendenc₹≥£↔y of base oil to separate from gr≥☆§ ease under heated conditions, ind♦®icating the quality of the grease̵↔>7;s colloidal stability π←when subjected to heatσφ♥. ① Steel mesh oil separation±εδ✔ is an important indicator of c∑÷olloidal stability, which ∑δcan predict changes in th←≈<✔e structural framework of grease under&<≥¶λhellip;
Definition: Grease volatility (evap∞®≥oration loss) refers to the degree ∑☆of evaporation loss of base oil in $₹grease under high-temperature con €♣ditions. ① The smaller the evapo∑δ βration loss, the better the high-teσ mperature performance of the gr✔§Ωease. ② Grease evaporation loss depends ≠♥ on the type, properties, and dist★illation composition o☆≠<δf the base oil used in the grease. ③&∏∏π↕hellip;
Definition: Penetration referγs to the depth, in units of≤σ 0.1 mm, that a standard ×λ$cone freely falls and p$☆enetrates into grease contained in a€• standard cup within 5 seconds. Pen☆©etration indicates the c¶&$onsistency or the degree of sofσ<→≠tness/hardness of the grease. &n ¥Ωbsp; Standard Cone Sizes for Pen✔←±etration Testing: Full-size cone penet∏"α←ration 1/2 cone penetration…↓<
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