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Understanding the Identification System for Indexable Inserts
Oct 1, 2014 · There are 16 standard shapes of indexable inserts, and each shape is identified by a capital letter as follows (Figure 1): A – Parallelogram 85°; B – Parallelogram 82°; C – Diamond 80° (Rhombic); D – Diamond 55° (Rhombic); E – Diamond 75° (Rhombic); H – Hexagon 120°; K – Parallelogram 55°; L – Rectangle 90°;
Calculated forces when turning | Cutting Tool Engineering
Feb 1, 2013 · About the Authors: Edmund Isakov (pictured), Ph.D., is a consultant, writer and frequent CTE contributor. He is the author of the books “Mechanical Properties of Work Materials” (Modern Machine Shop Publications, 2000); “Engineering Formulas for Metalcutting” (Industrial Press, 2004); “Cutting Data for Turning of Steel” (Industrial Press, 2009); the CD-ROM “International System ...
Pros and cons of indexable tools | Cutting Tool Engineering
Oct 4, 2016 · Cemented-carbide cutting tools have been in use since the late 1920s and are now ubiquitous in the metalcutting world. Around 1950, tools that accept cemented-carbide inserts became common in metalworking and are still considered a basic necessity. Indexable cutters are typically constructed of a steel body that has machined features, allowing for the accurate positioning of inserts.
Understanding cutting equations | Cutting Tool Engineering
Jul 1, 2014 · The following equation is used to calculate spindle speed: rpm = sfm ÷ diameter × 3.82, where diameter is the cutting tool diameter or the part diameter on a lathe in inches, and 3.82 is a constant that comes from an algebraic simplifica-tion of the more complex formula: rpm = (sfm × 12) ÷ (diameter × π). You can play around with this ...
Understanding tangential cutting force when milling
May 1, 2012 · Torque (T s) that is applied to the spindle, and therefore to the milling cutter, is generated by the tangential cutting force (F t) and can be calculated by the formula: T s = F t × R (1) Where R is a radius of a milling cutter. (Formulas are referenced later by the number in parentheses.) The concept of calculating tangential cutting force ...
Getting reaming right | Cutting Tool Engineering
Jun 1, 2010 · About the Author: Alan Richter is editor of Cutting Tool Engineering, having joined the publication in 2000. Contact him at (847) 714-0175 or [email protected]. Courtesy of Komet of America. Tool life increased from 1,200 holes to up to 50,000 holes when Magna Powertrain USA switched from a carbide reamer to a Dihart cermet-tipped Monomax Solid ...
Tapping the Deep Hole | Cutting Tool Engineering
Aug 1, 1995 · The choice of tap for a deep-hole tapping operation will have an impact on the cost of the operation. Generally, hand taps will be the least expensive option. Spiral-point taps cost about 10% to 20% more, and spiral-flute taps may cost twice as much as hand taps. Forming taps are about 2 1/4 times the cost of hand taps.
Basics of centerless grinding | Cutting Tool Engineering
Dec 1, 2016 · 520-548-7328. [email protected]. Kip Hanson is a contributing editor for Cutting Tool Engineering magazine. Contact him by phone at (520) 548-7328 or via e-mail at [email protected]. Ralf Schürl, who co-authored this report, is area sales manager for Schaudt/Mikrosa, of United Grinding, and technical sales …
Shrink-fit toolholder fundamentals | Cutting Tool Engineering
Sep 1, 2013 · Figure 1. A shrink-fit assembly showing the tool (green), holder (blue) and interference zone (yellow). There must be sufficient interference between the tool and holder to transmit the required force and torque to the cutting zone, while retaining the tool in the holder. Essentially, the toolholder has a hole that is smaller in diameter than ...