Disc springs are ideal choice

Published:  24 February, 2014

Dewalt says it is a brand with a reputation for providing high quality professional power tools. The company’s lead design engineer for drills was tasked with designing a high power right angle drill that was lightweight, compact and portable.

Special SPIROL Disc Springs were said to be ideal for this demanding, high performance application and design, where the goal was to maximise performance while minimising size. The design would incorporate a mechanical clutch built to limit maximum torque output to 95Nm. Without the huge gear reduction of 75:1, the drill would be capable of producing a lock rotor torque at the spindle of 237 Nm, transmitted directly to the operator of the tool. It was determined early on that the clutching thrust required in the space available could only be achieved by a disc spring design.

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