Taper turning 140-1 attachments

The method used to turn a taper depends upon the angle of taper, its length and the number of workpieces to be machined. Three methods are commonly used with a form tool, with the top or compound sUde and with a taper-turning attachment. 

A 250-ml, three-necked, round-bottomed flask (to which is attached at the bottom a coarse-sintered-glass frit, a Teflon stopcock, and a standard-taper male joint) is equipped with a 100-ml pressure-equalizing addition funnel, a reflux condenser, and a Tru-bore glass mechanical stirrer with a Teflon blade. The system is flushed with dry nitrogen via a gas inlet in the addition funnel and a gas outlet in the condenser, leading to a mineral-oil bubbler. Magnesium turnings (3.5 g, 0.144 mole) and 100 ml of sodium-dried diethyl ether... 

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