Miles lubricants, Castrol synthetic gear oil [PG150] Castrol synthetic gear lubricant oil supplied by Miles. We are Shenzhen Miles Lubricant Co. (www.sz-run.com) located in: Shenzhen, Guangdong specializing in: industrial lubricants, industrial machinery lubricating grease principle Shenzhen Miles lubricants reduce friction, the so-called friction means that when the relative motion of two surfaces, a relative displacement occurs in the external force, the contact surface there is a relative, called the friction surface. Many different types of friction phenomena have external friction, internal friction, sliding friction, rolling friction, dry friction, boundary lubrication friction, lubrication fluid friction, mixed lubrication friction. Apparent phenomena such as friction caused by high temperature, noise, wear, etc.. Which is the most harmful wear, abrasion have adhesive wear, abrasive wear Castrol synthetic gear oil PG150, corrosion and wear, abrasion and other types of surface fatigue, which directly affect the normal operation of machinery and equipment and even failure. The role of oil is in the friction between the two form a protective film to prevent direct contact between the metal and the metal, thereby cushioning the effect of friction, lubricates, reducing wear and tear, fraternity household machinery running. This protective film may be physically adsorbed film Castrol synthetic gear oil or a chemically adsorbed film or an oxide film, the film thickness and strength directly affect lubrication. Common lubricating oil between the main friction surface is formed as a protective film layer of synthetic gear oil Castrol EP220, lubricating oil is to rely on the theoretical additive effect of the friction surface of the protective film is formed in the adsorption, the base oil itself plays only additive between the carrier and the friction surface sealing, lubricating oil film has retreated to a secondary position. Physical and chemical properties of oil acid value in General, and the base value and acid value is a lubricant containing acidic substances indicators, the unit is mgKOH / g. Acid value of two strong acid values ??and weak values, a combination of both is the total acid number (referred to TAN). We usually call "acid value" actually means "total acid number (TAN)". TBN is an indicator of alkaline material content of the lubricant, the unit is mgKOH / g. TBN also points alkali weak base value and the value of the two Castrol synthetic gear oil EP150, a combination of both is the TBN (referred TBN). We usually call the "base value" actually means "TBN (TBN)". And the total acid value and actually includes the TBN. However, unless otherwise noted, the general said, "and in value," actually only refers to the "total acid", the unit also mgKOH / g.