Hand drill

Hand drill

Tools Required: their Care and Proper Use

Published in Les Goring, Manual of First and Second Fixing Carpentry, 2018

Figure2.32: These are for screw-head recessing in soft metal and timber. The rosehead pattern type is for metals, such as brass or aluminium, although it is also used for softwood (and can be used for hardwood). The snailhorn pattern type is used just for hardwood (but can be used for softwood). As illustrated, these are available with a round shank and traditional tapered tang for use with the ratchet brace, or with short or long, round shank only, for use with the hand drill or the electric or cordless drill.

Aluminium powder mixed rotary electric discharge machining (PMEDM) on Inconel 718

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Journal Information

Published in Australian Journal of Mechanical Engineering, 2018

Sagar Patel, Dignesh Thesiya, Avadhoot Rajurkar

To perform the rotation of the electrode, a rotary electrode attachment unit has been developed in-house. This rotary unit has been mounted on the Z-NC EDM machine. The rotary electrode EDM unit comprises a spindle shaft supported by two supporting frames (upper and lower supporting frames-plate)which in turn support a pair of roller bearings. The shaft can rotate relative to the machine head. A tool holder (hand drill chuck) is mounted at the other end for holding electrode tools. The motor for spindle rotation is mounted on the support frame and power is transmitted from the motor through a belt-pulley system. The rotary electrode EDM attachment can be functionally divided into six units. Rotation of the shaft is provided by a 15 V DC motor. The motor is mounted on the upper support frame; power is transmitted from the motor to the spindle through a belt-pulley arrangement.

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Tools Required: their Care and Proper Use

Aluminium powder mixed rotary electric discharge machining (PMEDM) on Inconel 718