The Hand Tools/Recreation award of distinction went to PMG Holding S.A., Mamer, Luxemborg, for a stainless steel camshaft pulley made for Yamaha Marine Co. Ltd., in Japan. The pulley operates in the timing control mechanism for a 4-stroke 115-hp outboard motor. It has an outer diameter of 4.36 in. which is considered large for PM stainless steel. It is made to a density of 6.7 gm/cm3 and has tensile and yield strengths 49.3 and 21.75 kpsi, respectively. Production of the large pulley required a special powder-mixing technique of first coating the particles with a liquid binder, then adding a substantial amount of a special lubricant. A precisely controlled vacuum dewaxing completely removes the additives. Machining the inner diameter counter bore is the only secondary operation.



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