Abstract: A powder metal mixture comprises a lubricant powder conventionally used to produce powder metal parts in combination with a modified lubricant. A lubricant conventionally used to compact and sinter a chosen powder metal mixture is modified by adding to it starch particles smaller than the average metal particle, and optionally, micronized cellulose fibers in so small an amount that the modified lubricant is present in an amount less than 2% by weight of the mixture. The Hall apparent density and the Hall flow rate of a powder metal mixture made with the modified lubricant of starch or (starch+fibers) remains within the ranges deemed desirable for production of compacted powder metal parts. Using the modified lubricant in lieu of the conventional lubricant increases green strength of a part made by compacting the mixture and improves dimensional conformance.

Abstract: A powder metal mixture comprises a lubricant powder conventionally used to produce powder metal parts in combination with micronized cellulose fibers in an amount less than 2% by weight of the mixture. The addition of fibers with the lubricant increases green strength of a part made by compacting the mixture and improves dimensional conformance.

Abstract: A rotatable tray which may be mounted to a vertical pole. A tray having an upright truncated conical shell formed on the tray at a central location on the tray. This conical shell having a bore extending therethrough for receiving the vertical pole. The interior of the shell having a beveled configuration inclining upwardly and inwardly. A separate hollow support sleeve is mounted to the vertical pole. The support sleeve has a truncated conical shape for being received in the bore of the conical shell and further has an interior surface having a beveled shape inclining upwardly and inwardly. An “O” ring or other stop member, constructed of resilient material, is located on the vertical pole at a selected position. The hollow support sleeve is then positioned to cover the “O” ring or other stop member and the tray fitted over the hollow support sleeve.

Abstract: A powder metal mixture comprises a lubricant powder conventionally used to produce powder metal parts in combination with a modified lubricant. A lubricant conventionally used to compact and sinter a chosen powder metal mixture is modified by adding to it starch particles smaller than the average metal particle, and optionally, micronized cellulose fibers in so small an amount that the modified lubricant is present in an amount less than 2% by weight of the mixture. The Hall apparent density and the Hall flow rate of a powder metal mixture made with the modified lubricant of starch or (starch+fibers) remains within the ranges deemed desirable for production of compacted powder metal parts. Using the modified lubricant in lieu of the conventional lubricant increases green strength of a part made by compacting the mixture and improves dimensional conformance.

Abstract: A powder metal mixture comprises a lubricant powder conventionally used to produce powder metal parts in combination with micronized cellulose fibers in an amount less than 2% by weight of the mixture. The addition of fibers with the lubricant increases green strength of a part made by compacting the mixture and improves dimensional conformance.

Abstract: A high availability DC power supply with isolated inputs. The high availability power supply includes a first diode having a first diode output and a second diode having a second diode output. A first isolated direct current power supply is coupled to the first diode. An output power bus defined by the first diode output coupled to the second diode output is provided. The output power bus is still available to supply power upon the loss of the first isolated direct current power supply or the loss of the second isolated direct current power supply.