Instant RPM Calculator
Enter diameter, pick material and tool, get the exact spindle speed with SFM or m/min readout. No more flipping through charts.
LatheMate Cutting CalcLatheMate Cutting CalcStop guessing spindle speeds. LatheMate instantly calculates RPM, feed, and depth for any material and tool — fully offline and built for the workshop.
Enter diameter, pick material and tool, get the exact spindle speed with SFM or m/min readout. No more flipping through charts.
Start with 18 seeded materials like aluminum, mild steel, and brass, plus HSS and carbide tools. Add your own for a truly personalized shop.
Toggle between roughing and finishing passes to see suggested feed per revolution and depth of cut for your exact setup.
Metric or imperial, this wizard outputs tap-drill diameter, thread depth, compound-rest angle, and speed for 60° V-threads.
Compute tailstock offset or compound slide angle for Morse (MT0–MT5) and custom tapers with clear visual guidance.
Generate a one-page PDF with your active speeds, feeds, and thread settings to keep at the machine. No Wi-Fi? No problem.
LatheMate replaces the paper charts and scrap-paper math that slow down every lathe setup. Whether you're a hobby machinist, model engineer, or trade student, select your material and tool type, enter diameter, and get recommended RPM, feed per revolution, and depth-of-cut guidance in seconds.
The app includes a threading wizard for metric and imperial V-threads, a taper wizard for Morse and custom tapers, a local material and tool library, a printable PDF quick-reference card, and a home-screen widget that keeps your latest speed reading one glance away. With all data stored on device in SwiftData, LatheMate works anywhere — no network, no account, no distractions.