Lube is general by base oil and additive two parts are comprised. Base oil is the bases of lube, the fundamentality that deciding lube is qualitative, additive is made up for and improve the inadequacy of side of base oil performance, gift certain new property, it is the main component of lube. Lube basically is used at reducing the attrition between athletic component surface. Have lubricant, cooling, antirust, insulation, power to machine equipment deferent, clean foreign matter, sealed gentle to rush wait for action. One, the 1 internal-combustion engine of classified of lube is oily: Also call motor oily, engine oil or crankcase oil. Can divide start oil of engine oil, gasoline engine for derv two kinds big. Derv engine is oily. The car of large lorry, bus, project uses engine oil in be like, these car serve as fuel with derv mostly, will represent with C word head. For example: GB GB 11122-2006 differentiates diesel engine oil into the 6 quality grade such as CC, CD, CF, CF-4, CH-4, CI-4. Gasoline engine oil, use normally at the car and on the small-sized car that is benzine engine (do not include) of 2 strokes engine. It is a delegate with S word head. For example: Differentiate gasoline engine oil into the 9 quality grade such as SE, SF, SG, SH, SJ, SL, GF-1, GF-2, GF-3 in GB GB 11121-2006. S represents gasoline engine oil, c starts engine oil on behalf of derv. Letter of the 2nd English represents quality social estate, the order and degree that exceeds range of in the future is higher. For example, SF should compare SE level tall, SG should compare SF level tall. High temperature (the viscosity grade when like SAE30-SAE60) one its number shows 100 ℃ , the number is larger viscosity is taller. Microtherm (be like SAEOW-SAE20W) : W is Winter(winter) abbreviate, express to use Yu Dongtian only, the number is smaller viscosity is lower. Microtherm liquidity is better. Round-the-clock model (NSAEl5W-40) : The viscosity grade when showing low temperature accords with the requirement of SAEl5W, the viscosity grade when high temperature accords with the requirement of SAE40, belong to wintry summer general-purpose, north is more commonly used lube of this kind of multistage. 2 gear oil: With Yu Run device of slippery positive drive includes worm wheel worm deputy lube. Cent shuts type gear oil, industry to open type gear oil, car gear oil for industry. 3 hydraulic pressure are oily: Use at the fluid static pressure (fluid drive) the working medium in the system, and use as fluid dynamic pressure (hydraulic power) the working medium in the system calls hydraulic power oil, call both interconnected system hydraulic pressure oil normally (L-H) . Hydraulic pressure oil and engine oil are compared, hydraulic pressure oil divides the basic function that has engine oil outside, still have fight the invariability of emulsibility, anti-wear properties, hydrolyze, filtrability, sex that fight bubble and air goodly to release a gender. 4, other oil. 2, the 1 exterior of crucial index of lube (chroma) : The color that oil tastes, can mirror its purificatory degree and stability. 2 density: Density is the physical function index with the the simplest, most commonly used lube. 3 viscosity: Include athletic viscosity, microtherm motivation viscosity, cryopump to send viscosity, high temperature tall cut viscosity. Viscosity report oil tastes inside attrition force, it is to state oil is tasted oily an index with fluidity. The viscosity of internal-combustion engine oil wants give attention to two or morethings to arrive the high temperature with have better and microtherm viscosity. Namely sticky lukewarm sex is good. 4 viscosity index: Viscosity index is by 40 ％ and the motion of 100 ℃ viscosity is calculated earning, viscosity index is high, state viscosity because of temperature change change is minor. 5 flash point: It is to be used state oil tastes security and a volatile index, in the regulation experiment condition falls, experiment blaze causes sample steam to catch fire, make blaze spreads to the lowermost temperature of liquid surface. Accordingly, the user is in the working requirement that the basis answers to use temperature and lubricating oil when choosing lube undertakes choosing. Think commonly, flash point is higher than using temperature 20 ％ - 30 ℃ , can safety is used. 6 pour point: It is the lowermost temperature that when pointing to the refrigeration below rated condition, can flow. The lube with high pour point cannot be used below microtherm. Contrary, in air temperature higher area was not necessary to use the lubricating oil with low pour point. Because the pour point of lube is lower, its production cost is higher, create needless waste. Say commonly, the lowermost temperature that the pour point of lube should compare use environment is low 5 ℃ ～ 7 ℃ . 7 moisture: It is the percentage of the water content in pointing to lube, it is number of concentration percentage by volume normally. Water can destroy the oily film that lube forms, make lubricant effect becomes poor, rustily equipment, make oil tastes easy generation sedimentary. Anyhow, the moisture in lube has been jumped over lesser. 8 mechanical impurity: It is to show consist in lube is medium not dissolve is mixed at benzine, alcohol of the dissolvent such as benzene sedimentary or content of glue shape in suspension. Normally, the mechanical impurity of lube base oil is controlled in 0. 005 ％ are the following (0.
Be regarded as under 005 ％ " without " ) . 9 bubble are characteristic: Show oil is tasted generate foamy tendency and foamy stability. Lube is being used actually in, because get oscillation, churn wait for action, in making air enters lube, down to forms bleb. Bubble is overmuch, the oil in can bringing about gasoline tank is tasted spill over to produce the harm such as acupuncture point corrode with metallic surface. 3, of lube choose 1 basis of regular to be in an area to choose appropriate viscosity order and degree, also can have normal and lubricant effect in order to ensure in the situation that working temperature produces bigger change. 2 choices have good rust-preventing characteristic to reach fight oxidation invariability, not easy below condition of high temperature high pressure oxidation is degenerative, service life is long. 3 choices are had fight bubble sex goodly, oil is tasted fall in working requirement, the bubble of generation disappears easily. The 4 lube with pick tone good. It is the choice that compares economy. Look pack, the lubricating oil that normal manufacturer produces is packed very exquisite, what heal uses is one-time cap more, there still is the number that prevent bogus on some heal tinfoil. If pack a design simple, imprinting however famous brand model of written characters, probable it is pinchbeck product. If hold the plastic bottle face of lube,have smeary leakage. Explain manufacturing technology is coarse, oily character also won't good. 2 see the value, if pursue low-cost only, often can purchase inferior oil. When price six to one, must observing carefully is fake. 3 see precipitation, the choice does not have foreign matter, without suspension content, without sedimentary, and the lube with the good liquidity when rock. CNC Milling
CNC Machining