What is backlash in gear terms? The term backlash is defined as the amount by which a tooth space exceeds the thickness of a gear tooth engaged in mesh. It is necessary to ensure the smooth rotation of meshed gears. The following extract is from the KHK Gear Catalogue* which details the types of backlashes, the relationships between backlashes and the fundamental equations, as well as easy-to-understand illustrations of how it all works.
Don't panic and discover below how to recover an unsaved file. 1  Go to FILE -> Open. 2  Choose Recent Workbooks. 3  Scroll down and click on the Recover Unsaved Workbooks button at the bottom of the list. Note.  When the Open dialog box pops up, just select the necessary file and click Open.
If you want to know how to retrieve an overwritten Excel file, go ahead and read this article. 1  Excel AutoSave and AutoRecover. 2  How to recover unsaved files in Excel. 3  Recover overwritten Excel files. 4  How to save a backup copy of your workbook.. Go to the FILE tab and choose Options from the FILE menu. 2. Click Save on the left-hand pane of the Excel Options dialog. 3. Make sure that both Save AutoRecover information every X minutes and Keep the last autosaved version if I close without saving are checked.