Engineering Drilling Calculators
High-precision calculators designed for CNC programmers, machinists, toolroom technicians, and mechanical engineers. Every tool features verified mathematical models and instant client-side calculation.
Speeds & Feeds
3 ToolsDrill Speed & Feed Calculator
Calculate spindle RPM, cutting speed (SFM & m/min), feed per revolution, linear feed rate, material removal rate (MRR), and power requirements with machine RPM limit clipping.
Solid Carbide Drill Calculator
Specialized parameters for solid carbide tooling. Features through-spindle coolant pressure (bar/PSI) requirements based on L/D ratio and deep-hole pilot sequencing.
Drill Life & Wear Estimator
Taylor's Tool Life equation (V·T^n = C) calibrated for drilling. Estimate holes per tool, cutting minutes before flank wear, and re-sharpening intervals.
Geometry, Sizes & Tapping
4 ToolsTap Drill Size Calculator
Calculate exact hole diameters for cut taps and roll form taps across Metric Coarse, UNC, UNF, and NPT pipe threads with customizable thread engagement percentages.
Drill Point & Tip Length Calculator
Trigonometric tip allowance calculator for 118°, 135°, and custom drill points. Calculate full-diameter depth for blind holes and breakthrough length for through holes.
Drill Bit Size Finder & Identifier
Universal drill size finder spanning all 232 standard sizes across Fractional Inch (1/64" to 1"), Wire Gauge (#1 to #80), Letter (A to Z), and Metric (0.5 to 25.0 mm).
Center Drill & Spot Drill Calculator
ANSI/ISO center drill size selector (#00 to #8) with live 60° center hole profile diagram, workpiece lathe diameter matching, and pilot tip RPM safety guardrails.
CNC Machining & Cycle Optimization
3 ToolsCNC Canned Cycle G-Code Generator
Interactive Fanuc & Haas G-code generator for G81, G82, G83, and G73 cycles. Supports Single Hole, Linear Hole Coordinate Arrays, and Bolt Hole Circle (PCD).
Peck Depth (G83) Calculator
Engineering peck schedule generator. Calculates initial peck, progressive decremental depth reductions (3D → 2D → 1.25D → 0.75D → 0.5D), and chip evacuation safety.
Drill Cycle Time & Production Cost
Accurate hole cycle timer accounting for drill point length, rapid approaches, feed travel, peck retracts, bottom dwells, tool changes, and batch machine hourly rates.