Material Stock Options
For a discussion on the purpose of material stock allowances, see Stock Machining Material Stock Allowances.
To override the default stock allowances specified for your machining VPE, edit setup options defined on the Material Stock routing node (right-click on the Material Stock node in the Manufacturing Process pane, and select Process Setup Options, or else select the Material Stock node in the Process and Machine Options tab of the Cost Guide, and click Set Process Options or Machine). There are options that allow you to override the allowance, or offset amount, in a specified direction:
• OD Stock Dimension: specify the minimum allowance for the Outer Diameter of the part, or the total Outside Diameter. Applies to round bar and round tube stock only.
• ID Stock Allowance: specify the minimum allowance for the Inner Diameter of the part, or the total Inner Diameter. Applies to round tube stock only.
• Stock Length Dimension: specify the minimum allowance for the length direction of the stock, or the total length. Applies to bar stock only.
• Stock Width Dimension: specify the minimum allowance for the width direction of the stock, or the total width. Applies to square and rectangular bar stock only.
• Stock Height Dimension: specify the minimum allowance for the height direction of the stock, or the total height. Applies to square and rectangular bar stock only.
• Plate Part Nest Length: specify the minimum allowance for the length direction of the stock, or the total length. Applies to pate stock only.
• Plate Part Nest Width: specify the minimum allowance for the width direction of the stock, or the total width. Applies to pate stock only.
• Plate Thickness: specify the minimum allowance for the height direction of the stock, or the total thickness. Applies to plate stock only.
The length direction of the stock is the direction that is perpendicular to the recognized cross-section, which can be displayed by clicking the 
Stock Form and Alignment button in the Component Viewer tool bar. For parts with rectangular stock, by default the height direction is along the smaller side of the cross-section and the width direction is along the longer side, although this can be modified using the Stock Form and Alignment window.
Stock Form and Alignment button in the Component Viewer tool bar. For parts with rectangular stock, by default the height direction is along the smaller side of the cross-section and the width direction is along the longer side, although this can be modified using the Stock Form and Alignment window.The Material Stock routing node also provides the following options:
• Plate Stock Length: applies to plate stock only.
• Plate Stock Width: applies to plate stock only.
• Perimeter Cutting Leadin Amount: applies to pate stock only.
• Rectangular Nesting Part Orientation: applies to plate stock only.
• Snap Up to a Standard Stock Height: applies to plate, rectangular bar, and round bar stock only. This setup option specifies how aPriori selects stock thickness. By default, in starting point VPEs, aPriori selects actual stock with the smallest standard thickness greater than or equal to the ideal thickness for the part (see Stock Machining Material Stock Allowances), and only selects virtual stock if there is no such actual stock. With this option, you can override the default on a part-by part basis. Select one of the following options:
o True: select actual stock with the smallest standard thickness greater than or equal to the ideal thickness (or select virtual stock, if there is no such actual stock). The setup option Stock Unit System determines whether aPriori uses metric standard stock heights or US standard stock heights.
o False: select virtual stock if there is no actual stock with ideal thickness.
VPE administrators can change a VPE’s default stock-selection behavior with the cost model variable snapStockSize (which is true in aPriori starting point VPEs).
• Stock Unit System: determines whether to use metric standard stock height or US standard stock height, when stock selection snaps up to standard height (see the setup option Snap Up to a Standard Stock Height, above).