tailieunhanh - MACHINERY'S HANDBOOK 27th CD Episode 5

Tham khảo tài liệu 'machinery's handbook 27th cd episode 5', kỹ thuật - công nghệ, cơ khí - chế tạo máy phục vụ nhu cầu học tập, nghiên cứu và làm việc hiệu quả | Machinery s Handbook 27th Edition LUBRICANTS 2333 Shear rate 5 1 D- 60t where D is the journal diameter in inches N is the journal speed in rpm and t is the film thickness in inches. Types of Oils. Aside from being aware of the many additives available to satisfy particular application requirements and improve the performance of fluids the designer must also be acquainted with the wide variety of oils natural and synthetic which are also available. Each oil has its own special features that make it suitable for specific applications and limit its utility in others. Though a complete description of each oil and its application feasibility cannot be given here reference to major petroleum and chemical company sales engineers will provide full descriptions and sound recommendations. In some applications however it must be accepted that the interrelation of many variables including shear rate load and temperature variations prohibit precise recommendations or predictions of fluid durability and performance. Thus prototype and rig testing are often required to ensure the final selection of the most satisfactory fluid. The following table lists the major classifications and properties of available commercial petroleum oils. Properties of Commercial Petroleum Oils and Their Applications Automotive. With increased additives diesel and marine reciprocating engines. Gear trains and transmissions. With E. P. additives hypoid gears. Type Viscosity Centistokes Density g cc at 60 F Type Viscosity Centistokes Density g cc at 60 F 100 F 210 F 100 F 210 F SAE 10W 41 22 SAE 20 W 71 General Purpose 44 SAE 30 114 66 SAE 40 173 110 SAE 50 270 200 Machine tools and other industrial applications. Marine propulsion and stationary power turbines. SAE 75 47 SAE 80 69 Turbine 32 SAE 90 285 approx Light Medium 65 SAE 140 725 Heavy 99 .

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