Craftsman's Cribsheet No. 78: Straightness of Cold Finished Steel Bars
The straightness of cold finished steel bars, and all other barstock for our machines, is of critical importance.
The straightness of cold finished steel bars, and all other barstock for our machines, is of critical importance. The controlling standard is ASTM A 108, Table A1.4. However, the standard errs in claiming the tolerances are measured by placing the bars on a level table and the depth of the arc then measured with a feeler gage and straight edge. While that will give a value for the maximum departure from straightness, it does not actually describe the true geometric relationship.
All Craftsman’s Cribsheets are available for viewing and download at short.productionmachining.com/cribsheets.
Related Content
-
Cold-Drawn Steel Barstock: How It Is Manufactured, Benefits to Your Shop
Understanding the benefits provided by cold-drawn steel barstock can help you optimize the work you quote by maximizing benefits to your manufacturing process and customer.
-
Roles of Women in Manufacturing: What I Learned
Over 20 women were featured in the Roles of Women in Manufacturing series, which started in January 2023.
-
Craftsman Cribsheet No. 128: Why Do Machinists Say Tenths Instead of Ten Thousandths?
In machinist parlance, a tenth is a tenth of a thousandth, not a tenth of an inch.
