Disc Tool Speed Check: Never Mix Per-Second and Per-Minute
A speed case with diameter 200 mm and surface speed 30 m/s, correcting the order-of-magnitude problem and explaining unit conversion and context limits with an independent formula.
Industry News
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10Expressing Tolerances for Small Cutting Tools: Upper and Lower Deviations, Plus/Minus Signs, and Chinese-Language Marking
Using dimensional tolerance formulas and worked examples, this article explains the relationships among negative deviations, bilateral tolerances, superscripts and subscripts, and the permissible size range.
Milling Feed Fundamentals: Reproducible Examples of Feed per Tooth and Material Removal Rate
Using publicly available tool manufacturer formulas and calculation examples, this article distinguishes feed per tooth, feed per revolution and table feed, and explains volume unit conversion in material removal rate.
Cutting Speed, Feed and Tool Life: Unit Checks Across the Full Calculation Chain
From cutting speed to spindle speed, feed per tooth, material removal rate and tool life, a continuous worked example illustrates the relationships among common machining parameters and how to convert their units.
Effective Diameter of Ball-Nose End Mills: From the Radical to Actual Cutting Speed
Using spherical geometry, explicit units and reproducible examples, verify the effective diameter and actual cutting speed of ball-nose end mills, and explain how depth of cut and contact position affect the calculated results.
Tool and Tool Holder Balance: Key Factors Affecting Machining Quality
Tool imbalance can cause spindle vibration, abnormal tool wear and a decline in machined surface quality. This article covers the key points of tool and tool holder balance from three aspects—tool selection, assembly and maintenance, and imbalance correction—to help understand the role of connection and coaxiality in high-speed machining.
Precision Lapping: How Lapping Tool Material and Shape Affect Accuracy
In precision lapping, the lapping tool that carries the abrasive grains affects the geometric accuracy and surface condition of the workpiece. This article covers key points on lapping tool material hardness, manufacturing accuracy and structure, and explains the difference in function between lapping sleeves and lapping plates, to help readers understand the applicable boundaries of different lapping tools.
Approach to Selecting Cutting Materials for CNC Machining Tools
The cutting portion of a tool directly carries out the material removal task, and its material selection must take into account the machining method and operating conditions. This article summarizes the basic differences between high-speed steel, cemented carbide, superhard materials and coatings, as well as the material selection approach for indexable insert tools, tools that users must regrind, and special machining scenarios.
Understanding CNC Lathe Tool Setting: Coordinate Relationships and Tool Compensation
The core of tool setting on a CNC lathe is establishing the relationship between the workpiece coordinates in the program and the actual machine positions. This article outlines the basic concepts of the tool reference point, the tool setting point and multi-tool position compensation, and explains why tool setting affects both machining accuracy and trajectory consistency after tool changes.
Curved Surface Milling Essentials: Process Sequencing, Toolpath Direction Changes, and Feed-in
Curved surface milling requires coordinating rough machining, semi-finish machining, and finish machining, while paying attention to the cutting position of the ball-nose end mill and the direction-change method of the line-cutting toolpath. This article summarizes the key points of process sequencing, feed-in, and pre-machining inspection to help understand the relationship between curved surface quality and toolpath arrangement and material condition.