ThreadChaser vs CNC Speeds & Feeds Calculator

ThreadChaser is the fastest way to identify an unknown thread — on the shop floor, in the field, or at the workbench. Simply measure the major diameter and pitch of any fastener or threaded component, enter the values, and ThreadChaser instantly searches its database of metric and imperial thread standards to find the closest matches. No more guessing, no more flicking through reference books, no more ordering the wrong tap or die. Who it's for ThreadChaser is built for engineers, machinists, mechanics, maintenance technicians, and anyone who regularly works with threaded fasteners. Whether you're identifying a mystery bolt on a piece of imported machinery, matching a thread on a worn component, or specifying a tap drill size for a new hole, ThreadChaser gives you the answer in seconds. What it covers: ISO Metric coarse and fine threads (M1 through M68) Unified National threads — UNC, UNF, and UNEF British Standard — BSW, BSF, and BSP With more standards being added regularly What you get: Instant thread matching with a tolerance you control Pitch diameter and minor diameter for every result Recommended tapping drill sizes Internal and external thread modes Technical thread profile diagrams A full reference library of thread standards and formulas How to use: Use a digital calliper to measure the major diameter or internal bore of the thread. Use a thread pitch gauge or ruler to measure the pitch (distance between thread crests). Enter both values, select your preferred standards, and hit Search. ThreadChaser ranks every match by how closely it fits your measurement. Terms of Use: https://www.threadchaser.com/TERMS

Speeds and feeds for CNC milling in one tap: pick a material and HSS or carbide, and the spindle RPM and feed rate appear straight away. Tap drill, bolt circle, taper and turning surface finish sit alongside, so the numbers a machinist reaches for all day are in one shop app that works offline, in inches or millimetres. ▶ SPEEDS & FEEDS • 8 workpiece materials: aluminum, brass, mild steel, alloy steel, stainless 304, cast iron, titanium and plastic • HSS or carbide tooling, with the starting cutting speed shown in SFM or m/min • Enter tool diameter, flute count and chip load (feed per tooth) to read spindle RPM and table feed in in/min or mm/min • Leave a field blank and the app fills in a starting value: a 10 mm (0.375 in) tool, 4 flutes and a suggested chip load kept at or below a published carbide end-mill slotting chart, so you see a result the moment you open it. Type your own numbers and they replace the suggestions • End-mill diagram shows the flute count and chip load per tooth for the setup on screen • Save up to 50 named presets and reload a whole setup in one tap ▶ TAP DRILL • Metric (20 sizes) and Unified UNC/UNF (33 sizes) threads • Thread engagement from 50% to 85% in 5% steps, 75% as the shop default • Theoretical tap-drill size plus the nearest standard drill ▶ BOLT CIRCLE • Hole count, circle diameter, start angle and centre X/Y give the X/Y coordinates of every hole, drawn to scale • Tap a row to copy its coordinates, or copy the whole table for the control ▶ TAPER & TURNING • Taper from two diameters and a length, or from an included angle, taper per foot or a 1:N ratio: compound-rest half-angle, included angle, taper per foot and per inch, in decimal degrees and degrees-minutes-seconds • Turning surface finish: theoretical Ra and Rt from feed per rev and nose radius, or the maximum feed for a target Ra ▶ REFERENCE • Cutting speed table by material for HSS and carbide • Drill size chart with 243 number, letter, fractional and metric sizes, searchable • Thread pitch and minor diameters, drill point depth and typical surface-finish ranges All values are conservative starting points from published data, not guarantees. Always check against your tooling, machine and setup, start slow and increase.