Acro News

Heat Treating Always Changes The Part

This truism is one of the reasons there is still a lot of art in metal part production.  We see this from bends/angles relaxing, to threads changing sizes, to general distortion of flat areas.  In helping our customer to design parts we often have to mitigate the changes that happen in heat treatment or plan […]

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Standard Gauge Tolerances For Sheet Metal & Coil

Having been unable to find a good compilation of standard gauge tolerances; and those standard gauges & their tolerances being the most economical raw material to purchase; we’ve assembled the following guideline chart. Gauge  HR Steel HR Tol Galv Steel Galv Tol Stainless Steel SS Tol Aluminum 3 0.2391 +/-.009 0.25 0.2294 4 0.2242 +/-.009 0.2344 […]

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Searching For Inside Customer Service Rep

Job Title: Customer Service and Inside Sales Representative Department: Metal Stamping Reporting to: President   Job Summary:  The Sales Representative will be responsible for managing customer accounts and following up on potential sales opportunities within the metal stamping divisions of Acro. The key responsibility will be to assist outside sales in providing customer service to […]

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Understanding Material Temper

Most of us are familiar with the old hardness call outs: Full Hard, Half Hard, Etc.  But some of the numbering systems can be confusing.  As the temper number goes up for steel the material get softer, but as the number goes up for copper it gets harder.  Many of these numeric or descriptive tempers […]

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Hole Diameter vs. Material Thickness

One driving factor when it comes to the cost of metal parts is the diameter of a hole required to be punch in its relation to the thickness of the material.  In order to be able to stamp most cost effectively the hole diameter should be at least 1.5 times the thickness of the material […]

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Raw Material Edges

Standard AISI Types of Edges ● No. 1 Round Edge: Radius approximately equal to 1/2 the thickness. ● No. 2 Mill Edge: Naturally formed hot rolled or cold rolled edge. ● No. 3 Slit Edge: Approximately square edge with slitting burr intact. ● No. 4 Round-Cornered Edge: Rounded edge – may have slitting fracture visible […]

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Explaining the “Break Away”

Explaining the “break away” or “break edge”: During the stamping process, metal is not so much cut as it is broken out.  This means that a clean edge only exists for a portion of that edge and a rougher broken edge shows for the rest.  With traditional punch presses it was just an industry standard that […]

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Explaining the Pinch Trim

When looking at the edge of a drawn cup or can there are really 3 options: 1. You can leave the edge as is from the forming or drawing operation 2. You can machine it square or with some other geometry 3. You can use a pinch trim in the die A regular formed edge […]

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Using Parts For Marketing

Are your metal parts seen by your customers?  Can you add a message for little or no cost?  These are questions that we at Acro have been assisting our customers with for years.  Quite often we stamp the part number or size in the component for identification during assembly; even county of origin.  However, if […]

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