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compiled & edited by Bernard Martin  Carbide and HSS circular saws are essential tools in the metalcutting industry, however, breakage issues arise that impact performance and efficiency. In this article, we'll look into the common causes of carbide circular saw breakage and provide insights into preventive measures to enhance saw longevity. Key Factors Influencing BreakageSaw Thickness and Keyways:
Monitoring HSS Saw Colors Preventive MeasuresWasher Size and Equal Diameter
Understanding the factors contributing to carbide circular saw breakage is crucial for efficient and safe operation. By addressing key issues such as washer mounting, cleanliness, and proper tightening, operators can significantly enhance the lifespan of their saws. Regular inspections, maintenance, and adherence to recommended operating practices are vital to preventing breakage and ensuring optimal performance in various metalcutting applications.
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compiled & edited by Bernard Martin  As more and more of our customers are using Martindale Gaylee Circular saws we put together this guide to the commonly asked questions such as "Is there a rule-of-thumb for the number of teeth?" or "How much side clearance should I have?" Here we cover a lot of the fundamentals of selecting the right circular saw blade configuration, some tips, tricks, and troubleshooting for when things go wrong. Circular Saw Feed RatesThese are general cutting speed recommendations for circular saws used in metalcutting from Martindale/Gaylee. The may vary from application to application but are basically some general suggestions starting parameters when using high speed or carbide saws.
Selecting the Proper Number of Teeth in Your Metalcutting SawGenerally speaking, deep cuts and soft material require fewer teeth for chip clearance and stronger teeth (landed). Thin material requires more teeth, but keep-in-mind that at least 2 teeth on the blade need to be engaged in cut. Hard materials and narrow slots (under .025”) likewise require more teeth. Hard Materials require more teeth, and give a smoother cut, but at a much lower production rate. Alternately beveled teeth keep chips from sticking in the cut and in the tooth gullets. And Remember that there should be at least 2 teeth engaged in the cut at all times.
Rake Angles and Side Clearance AnglesRAKE ANGLES Just as in an end mill or a band saw blade, a rake angle is the term used to describe the direction of the blade’s teeth, as referenced from the rotation and central axis of a saw blade. If you imagine a line going from the exact center of the blade to each tooth, having the front of the tooth directly on that line would be a zero degree rake angle. The rake angle of the blade is described in comparison to that imaginary line. A positive rake angle meana that the teeth are angled more towards the angle of rotation, while a negative rake angle would mean that they are angled backwards, away from the direction of rotation. Generally speaking, the preferred rake angle is:
SIDE CLEARANCE (Tangential Clearance Angle) This is also known as dish or hollow grind. You measure down the side of the tip and the difference it is the difference between front and back. As you cut, material it gets compressed and springs back after the cutting edge passes. A steep side clearance angle gives plenty of room for the material to expand and prevents thermal expansion of the base material. Keep in mint that a very flat side clearance angle can provide a smoother cut in some materials. For stainless steel and tenacious metals such as copper, zinc, tin or lead an increase in the side clearance is desirable as these materials tend to "spring back" (thermal expansion) on the blade.  |
Technical Support BlogAt Next Generation Tool we often run into many of the same technical questions from different customers. This section should answer many of your most common questions.
We set up this special blog for the most commonly asked questions and machinist data tables for your easy reference. If you've got a question that's not answered here, then just send us a quick note via email or reach one of us on our CONTACTS page here on the website. AuthorshipOur technical section is written by several different people. Sometimes, it's from our team here at Next Generation Tooling & at other times it's by one of the innovative manufacturer's we represent in California and Nevada. Archives
October 2024
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