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Department of Mechanical Engineering ME EN 4000 - Engineering Design I Lab 3 Assigned: Thursday, September 22, 2005 Due: Friday, September 30, 2005, 1pm, to the ME4000 basket in 2110 MEB Introduction Proper engineering drawings not only show all relevant views and dimensions, but also include tolerances that will ensure the part’s functionality. In this exercise we will identify the fits and tolerances required for the internal hub geometry and the external spindle geometry. Task 1. Review the attached assembly drawing and modify your spindle if necessary. 2. Using the attached tables, identify the proper fits for the fixed (30x55x13) and the loose (40x68x15) ball bearing. 3. At the part level, modify all dimensions for both the hub and spindle to include the fits/tolerances that ensure the functionality of the hub assembly. 4. Create A-size engineering drawings for both the spindle and the hub. Include the ME4000 drawing format and specify all relevant information. Please refer to the solutions of earlier labs for the proper format of drawings. 5. Print out both drawings, write your name on it and hand them in. Hints • The spindle is rigidly mounted to the suspension of a car. The hub will hold the wheel. • The main view of an engineering drawing should match the part’s orientation during manufacturing. • Only show views that are relevant. • If fits or tolerances are specified using a standard code (i.e. 20H7), create a table at the bottom of the drawing that specifies the tolerance numerically. • If a part is symmetric about an axis, this axis needs to be shown in the drawing. • Modify the scale of your drawing to maximize the view within the drawing boundary as much as possible. Name: ID


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U of U ME EN 4000 - Lab 3

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