Pump drill
A pump drill is a simple hand-powered device to impart a rapid rotating motion to a rod (the spindle or drill shaft). It can be used use as a drill to make holes in various materials. It consists of: the drill shaft, a narrow board with a hole through the center, a weight (usually a heavy disc) acting as a flywheel, and a length of cord. The weight is attached to the shaft, near the bottom end, and the hole board is slipped over the top. The cord is run through a hole or slot near the top of the shaft and attached to both ends of the hole board. The length of the cord is such that, at its lowest position, the board lies just above the weight.
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Pump drill
A pump drill is a simple hand-powered device to impart a rapid rotating motion to a rod (the spindle or drill shaft). It can be used use as a drill to make holes in various materials. It consists of: the drill shaft, a narrow board with a hole through the center, a weight (usually a heavy disc) acting as a flywheel, and a length of cord. The weight is attached to the shaft, near the bottom end, and the hole board is slipped over the top. The cord is run through a hole or slot near the top of the shaft and attached to both ends of the hole board. The length of the cord is such that, at its lowest position, the board lies just above the weight.
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A pump drill is a simple hand- ...... process then can be repeated.
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A pump drill is a simple hand- ...... rd lies just above the weight.
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Pump drill
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