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changeover
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The process of switching a machine from making one type of part to another.
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chuck
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A workholding device with moveable jaws that grip a revolving workpiece or cutting tool on machines such as the mill, lathe, or drill press.
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collet
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A slitted device that holds a workpiece or cutting tool in place as it rotates. A collet has a hole through which the workpiece passes, and it is designed to hold specific dimensions.
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datum
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A common reference point for machine tools, programs, and fixtures.
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die
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An assembled device used for forming or stamping sheet metal.
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economic order quantity
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The number of orders required to minimize the cost of producing parts and holding them in inventory. Economic order quantity (EOQ) is a concern for more traditional manufacturing companies.
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external step
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A changeover action that can take place while the machine is still running.
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Five S
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A targeted list of activities that promotes organization and efficiency within a workspace. The Five S terms are sifting, sorting, sweeping, standardizing, and sustaining.
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functional clamp
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A device designed to hold two or more parts or components together and prevent them from moving.
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intermediate jig
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An interchangeable component that standardizes the locating and support of workholding devices for various machines. Intermediate jigs fit into a sub-plate or main part that does not move.
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internal step
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A changeover action that can take place only when the machine has stopped.
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kaizen event
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A multi-day, hands-on event that targets a particular problem area within a company. Kaizen events result in dramatic changes carried out by a cross-functional team.
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lathe
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A machine tool that holds a cylindrical workpiece at one or both ends and rotates it while various cutting tools remove material. Turning is a common operation performed on the lathe.
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locking pin
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A type of one-touch, cylindrically shaped fastener with two balls that extend to hold components together.
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one-touch fastener
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A non-threaded attachment that clamps and unclamps with one push of a finger or hand. One-touch fasteners often have internal springs.
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one-turn fastener
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A threaded attachment that clamps and unclamps with one revolution of the threads.
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parallel operation
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The use of two or more people to set up the same machine at the same time. Parallel operation helps reduce setup times at the machine.
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scheduled changeover
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A machine setup that takes place according to a calendar instead of direct responses to customer demand. Scheduled changeovers help level and balance production.
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setup
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The series of tasks necessary to prepare a product for processing. Setup includes preparing machines and collecting paperwork, tools, and materials.
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setup preparation
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Any changeover tasks that can take place while the machine is still running, such as collecting tools and paperwork and preparing fixtures.
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setup reduction
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A systematic method of eliminating manufacturing setup steps and streamlining those steps that remain.
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setup reduction team
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A group of technical and non-technical personnel that studies machines and processes to find ways to reduce or eliminate changeover steps.
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setup technician
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A shop worker who specializes in preparing machines to make parts.
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single minute exchange of dies
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A theory of setup reduction that strives to reduce the time it takes to perform machine setups to under 10 minutes.
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standardization
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A practice in which as many elements as possible are made the same. Manufacturers use standardized fasteners, tools, fixtures, and designs to streamline changeovers.
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sub-plate
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A device that is mounted and located on a worktable or machine to provide precise positioning for multiple, standardized intermediate jigs.
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total productive maintenance
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A manufacturing improvement method that increases production and reduces waste through continuous attention to the condition of machines and processes. TPM's main goal is to maximize equipment usefulness across its lifespan.
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