Product Development Procedure Activities. 1  Product/ Process Initiation. 2  Determining Requirements and Objectives. 3  Meeting Requirements and Objectives. 4  Design Acceptance. 5  Design Validation and Testing.
An idler gear is a gear wheel that is inserted between two or more other gear wheels. The purpose of an idler gear can be two-fold.Firstly, the idler gear will change the direction of rotation of the output shaft.n idler-wheel drive is a system used to transmit the rotation of the main shaft of a motor to another rotating device, for example the platter of a record-reproducing turntable or the crankshaft-to-camshaft gear train of an automobile.
In this edition of How Stuff Works, you will learn about gears, gear ratios and gear trains so that you can understand what all the different gears you see are doing. Gears are generally used for one of four different reasons: To reverse the direction of rotation.