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Press release
28.01.2011  |  5594x
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The right tool for zero-defect production

Quality management begins with the selection of the stationary screwdriver.

EC motor or compressed air screwdriver? What determines the type of drive?

The achievement of zero defect production has the highest priority in industrial assembly. Time and again we hear of product recalls due to defective screw joints. The associated material damage and loss of brand image is the dread of every industry. And when it relates to safety-relevant components such as in the automotive industry then the manufactures make every conceivable effort to ensure maximum process reliability throughout the installation process. The selection of the correct tightening tool for industrial mass production is the cornerstone in creating a high quality fault free production system.

A threaded fastener is intended to clamp components together so that external forces cannot cause them to come apart and the parts essentially behave like a single unit. The designer calculates how high the applied clamping force must be so that the screwed or bolted component can withstand the most demanding mechanical stress. However, the question is whether the predetermined clamping force is correctly achieved during the tightening process. The trickiest problems concerning screw driving technology are unknown screw seating and assembly/component-related variables.

Since the clamping force generated during mass production assembly is difficult and, when feasible, expensive to measure, the applied torque and angle of rotation are accepted as the governing process variables in screw driving technology. The more precisely an industrial screwdriver applies the predetermined torque or angle of rotation the more likely that the goal of zero-defect screw/bolt assembly will be achieved.

There is no universal answer to the much debated question on the most appropriate drive for the stationary screwdriver spindle. The correct answer lies in finding the best screwdriver for the particular application. Full service providers such as DEPRAG SCHULZ GMBH u. CO. in Amberg/Bayern offer both: pneumatic screwdrivers and screwdrivers using EC Electric motor technology. These specialists in screw driving technology have made a name for themselves with their technically advanced and economical stationary screwdriver spindles.

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