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Powder Metals. Chapters 3.12. http://www.alliedsinterings.com/. Oil Impregnated sintered bronze bearings. Sintered bronze begins as powdered metal which is packed into a die and pressed under heavy tonnage to finished blank - near net - sizes.
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Powder Metals Chapters 3.12
Oil Impregnated sintered bronze bearings Sintered bronze begins as powdered metal which is packed into a die and pressed under heavy tonnage to finished blank - near net - sizes. This material, now in a "green state”,is then sintered in a furnace to fuse the powdered particles into a solid form. This form remains approximately 20% porous. Lubricant is absorbed and stored in countless thousands of tiny interconnected pores - between sintered groups of powder - by vacuum impregnation or hours long immersion in hot oil. Capillary action holds the oil in the bearing and prevents it from dripping out. http://www.lm-tarbell.com/machining_sintered_bronze.htm
Make Powder http://asmcommunity.asminternational.org/static/Static%20Files/IP/Magazine/AMP/V163/I03/amp16303p036.pdf?authtoken=6822a0527194782b33d96e9d5b876b165673a344
Press and Sinter http://www.marquette.edu/engineering/pages/AllYouNeed/Mechanical/Labs/cjmaprojects.html http://asmcommunity.asminternational.org/static/Static%20Files/IP/Magazine/AMP/V166/I08/amp16608p054.pdf?authtoken=a394a51d5b522109a2ba7208a9e20cf210e67530
What is the advantage of making gears using powder metals? For the “crankshaft/counterweight, what is the purpose of the small “flat” at the edge of the part? What draft angle is needed on this connecting rod wall to facilitate removal from the die? Powder Metal Air Compressor Parts http://www.iti-abrasives.com/img%5Csolutions%5C2527_Air_Pump_Powder_Metallurgy_Parts.jpg