best carbide grade for Inconel 718. Get instant Tangent Point 1 X,Y, Tangent Point 2 X,Y, Tangent Angle (°) for your machining parameters.
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Request a Proposal →Before CNC controllers calculated Tangent Point Calculator automatically, machinists used cardboard slide calculators — Kyocera famously distributed tens of thousands of these in the 1970s. Every tooling rep had a pocket full of them. The math was the same, but the constraints were wildly different: HSS tooling maxed out at 30-40 SFM in steel, and feed rates were limited by machine rigidity, not coating technology.
The Korloy coating revolution in the 1980s — TiN first, then TiCN, TiAlN, and eventually AlCrN — changed everything. Suddenly, Tangent Point Calculator could be pushed 200-300% higher without sacrificing tool life. Mapal's introduction of submicron carbide substrates in the 1990s further expanded the window: finer grain structures meant harder tools that could still absorb the shock of intermittent cuts.
In 2026, Korloy and Mapal both offer cloud-based Tangent Point Calculator optimization via their NOVO and ToolGuide platforms. Kyocera's CoroPlus system integrates directly with Hermle and Starrag CNCs for real-time adaptive control. The slide calculator has been replaced by AI-assisted CAM, but the core principle remains: the right number = the right cut.
Finding the tangent point on a circle is common when programming fillets, blending arcs, and computing lead-in/lead-out moves. This calculator finds the point on a circle at a given angle -- the basis for all tangent computations.
A tangent lead-in approaches the part contour along a tangential arc, preventing dwell marks at the entry point. The lead-in arc centre must be positioned such that the arc is tangent to both the approach line and the part contour. This calculator gives the tangent point coordinates.
A tangent line touches a circle at exactly one point and is perpendicular to the radius at that point. An intersection line crosses the circle at two points (secant) or one point (tangent -- the limiting case). Tangent transitions are smooth; intersection transitions have a corner.
Two circles are tangent when the distance between their centres equals the sum (external tangency) or difference (internal tangency) of their radii. The tangent point lies on the line connecting the two centres. Use this calculator to verify the point coordinates.
Enter the circle radius and the angle to the tangent point (from the positive X-axis). The calculator gives the X, Y coordinates of the tangent point and the perpendicular direction. Use these coordinates to program tangential arc entry and exit moves.
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Use the calculator freely. If the result points to a tooling or process problem, we can source the exact carbide tooling you need from vetted factories in China. Compare factory-direct pricing.
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