# CNC Feeds & Speeds

> CNC machining calculators, feeds and speeds references, trade-specific tools, formulas, guides and technical articles.

## Core Pages

- [Home](https://cncfeedspeeds.com/) — Main CNC Feeds & Speeds homepage with basic and advanced Feed & Speed calculators.
- [Calculator Library](https://cncfeedspeeds.com/calculators/) — Index of dedicated CNC calculators.
- [Trade-Specific Tools](https://cncfeedspeeds.com/trade-specific-tools/) — Index of operation and intent-specific tools.
- [Milling Reference](https://cncfeedspeeds.com/milling/) — CNC milling technical reference.
- [Turning Reference](https://cncfeedspeeds.com/turning/) — CNC turning technical reference.
- [Drilling Reference](https://cncfeedspeeds.com/drilling/) — CNC drilling technical reference.
- [Tapping Reference](https://cncfeedspeeds.com/tapping/) — CNC tapping technical reference.
- [Materials](https://cncfeedspeeds.com/materials/) — Material-specific machining references.
- [Charts & Formulas](https://cncfeedspeeds.com/charts/) — Formulas and unit relationships.
- [Guides](https://cncfeedspeeds.com/guides/) — Step-by-step machining guides.
- [Articles](https://cncfeedspeeds.com/blog/) — Technical article archive.
- [About](https://cncfeedspeeds.com/about/) — Site purpose and methodology.
- [Contact](https://cncfeedspeeds.com/contact/) — Contact and corrections.
- [Privacy Policy](https://cncfeedspeeds.com/privacy-policy/) — Privacy information.
- [Terms of Use](https://cncfeedspeeds.com/terms-of-use/) — Terms of use.
- [Disclaimer](https://cncfeedspeeds.com/disclaimer/) — Calculation and safety limitations.
- [Site Directory](https://cncfeedspeeds.com/site-directory/) — Human-readable resource index.

## Core Calculators

- [Feed & Speed Calculator](https://cncfeedspeeds.com/) — Calculate spindle speed and feed from cutting speed, diameter, flute count and chip load.
- [Spindle Speed Calculator](https://cncfeedspeeds.com/calculators/spindle-speed-calculator/) — Calculate spindle RPM from cutting speed and tool diameter.
- [RPM Calculator](https://cncfeedspeeds.com/calculators/rpm-calculator/) — Calculate spindle speed from cutting speed and diameter.
- [Feed Rate Calculator](https://cncfeedspeeds.com/calculators/feed-rate-calculator/) — Calculate feed rate from RPM, flute count and chip load per tooth.
- [Chip Load Calculator](https://cncfeedspeeds.com/calculators/chip-load-calculator/) — Calculate chip load per tooth from feed, RPM and flute count.
- [SFM Calculator](https://cncfeedspeeds.com/calculators/sfm-calculator/) — Calculate surface feet per minute from spindle speed and diameter.
- [Cutting Speed Calculator](https://cncfeedspeeds.com/calculators/cutting-speed-calculator/) — Calculate cutting speed from RPM and tool diameter.
- [MRR Calculator](https://cncfeedspeeds.com/calculators/mrr-calculator/) — Estimate material removal rate from feed and cutting engagement.
- [Feed Per Revolution Calculator](https://cncfeedspeeds.com/calculators/feed-per-rev-calculator/) — Calculate feed per revolution from feed rate and RPM.
- [Cutting Time Calculator](https://cncfeedspeeds.com/calculators/cutting-time-calculator/) — Estimate cutting time from cutting distance and programmed feed.
- [Tapping Feed Calculator](https://cncfeedspeeds.com/calculators/tapping-feed-calculator/) — Calculate synchronized tapping feed from RPM and thread pitch.
- [Automatic Feed & Speed Calculator](https://cncfeedspeeds.com/calculators/automatic-feed-speed-calculator/) — Review a reference starting point from material and tool inputs.

## Specialized Calculator Pages

- [CNC Feed Rate Calculator](https://cncfeedspeeds.com/calculators/cnc-feed-rate-calculator/) — CNC Feed Rate Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Milling Feed Rate Calculator](https://cncfeedspeeds.com/calculators/feed-rate-calculator-milling/) — Milling Feed Rate Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Drill Feed Rate Calculator](https://cncfeedspeeds.com/calculators/feed-rate-calculator-drilling/) — Drill Feed Rate Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Lathe Feed Rate Calculator](https://cncfeedspeeds.com/calculators/lathe-feed-rate-calculator/) — Lathe Feed Rate Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Plunge Feed Rate Calculator](https://cncfeedspeeds.com/calculators/plunge-feed-rate-calculator/) — Plunge Feed Rate Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Feed Rate Calculator for Tapping](https://cncfeedspeeds.com/calculators/feed-rate-calculator-for-tapping/) — Feed Rate Calculator for Tapping with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Feed Rate Calculator for Milling Aluminum](https://cncfeedspeeds.com/calculators/feed-rate-calculator-milling-aluminum/) — Feed Rate Calculator for Milling Aluminum with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [CNC RPM and Feed Rate Calculator](https://cncfeedspeeds.com/calculators/cnc-rpm-and-feed-rate-calculator/) — CNC RPM and Feed Rate Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Metric Feed Rate Calculator](https://cncfeedspeeds.com/calculators/metric-feed-rate-calculator/) — Metric Feed Rate Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [CNC Router Feed Rate Calculator](https://cncfeedspeeds.com/calculators/cnc-router-feed-rate-calculator/) — CNC Router Feed Rate Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Milling Cutting Speed Calculator](https://cncfeedspeeds.com/calculators/cutting-speed-calculator-milling/) — Milling Cutting Speed Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Lathe Cutting Speed Calculator](https://cncfeedspeeds.com/calculators/cutting-speed-calculator-lathe/) — Lathe Cutting Speed Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Drill Cutting Speed Calculator](https://cncfeedspeeds.com/calculators/cutting-speed-calculator-drilling/) — Drill Cutting Speed Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Metric Cutting Speed Calculator](https://cncfeedspeeds.com/calculators/cutting-speed-calculator-metric/) — Metric Cutting Speed Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [End Mill Cutting Speed Calculator](https://cncfeedspeeds.com/calculators/end-mill-cutting-speed-calculator/) — End Mill Cutting Speed Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [CNC Cutting Speed Calculator](https://cncfeedspeeds.com/calculators/cnc-cutting-speed-calculator/) — CNC Cutting Speed Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Thread Cutting Speed Calculator](https://cncfeedspeeds.com/calculators/thread-cutting-speed-calculator/) — Thread Cutting Speed Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Sandvik Cutting Speed Calculator Cross-Check](https://cncfeedspeeds.com/calculators/sandvik-cutting-speed-calculator/) — Sandvik Cutting Speed Calculator Cross-Check with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Cutting Tool Speed Calculator](https://cncfeedspeeds.com/calculators/cutting-tool-speed-calculator/) — Cutting Tool Speed Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Milling Spindle Speed Calculator](https://cncfeedspeeds.com/calculators/spindle-speed-calculator-milling/) — Milling Spindle Speed Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Lathe Spindle Speed Calculator](https://cncfeedspeeds.com/calculators/spindle-speed-calculator-lathe/) — Lathe Spindle Speed Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Drill Spindle Speed Calculator](https://cncfeedspeeds.com/calculators/spindle-speed-calculator-drilling/) — Drill Spindle Speed Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [CNC Spindle Speed Calculator](https://cncfeedspeeds.com/calculators/cnc-spindle-speed-calculator/) — CNC Spindle Speed Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Milling MRR Calculator](https://cncfeedspeeds.com/calculators/mrr-calculator-milling/) — Milling MRR Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Turning MRR Calculator](https://cncfeedspeeds.com/calculators/turning-mrr-calculator/) — Turning MRR Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [CNC MRR Calculator](https://cncfeedspeeds.com/calculators/cnc-mrr-calculator/) — CNC MRR Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [CNC Cutting Time Calculator](https://cncfeedspeeds.com/calculators/cnc-cutting-time-calculator/) — CNC Cutting Time Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Lathe Cutting Time Calculator](https://cncfeedspeeds.com/calculators/lathe-cutting-time-calculator/) — Lathe Cutting Time Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Cutting Length Calculator](https://cncfeedspeeds.com/calculators/cutting-length-calculator/) — Cutting Length Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.
- [Spindle Speed and Feed Rate Calculator](https://cncfeedspeeds.com/calculators/spindle-speed-and-feed-rate-calculator/) — Spindle Speed and Feed Rate Calculator with a dedicated calculator, formula, worked example, unit guidance, verification checks and machining references.

## Trade-Specific Tools

- [Speed and Feed Calculator Milling](https://cncfeedspeeds.com/trade-specific-tools/speed-and-feed-calculator-milling/) — Speed and feed calculator for milling with transparent RPM, feed, chip-load, engagement and MRR calculations for CNC milling jobs.
- [Speed and Feed Calculator Drilling](https://cncfeedspeeds.com/trade-specific-tools/speed-and-feed-calculator-drilling/) — Drilling speed and feed calculator for RPM, feed per revolution, holemaking setup and CNC drilling checks.
- [Speed and Feed Calculator Lathe](https://cncfeedspeeds.com/trade-specific-tools/speed-and-feed-calculator-lathe/) — Lathe speed and feed calculator for turning RPM, feed per revolution, diameter and CNC lathe setup checks.
- [Speed and Feed Calculator Metric](https://cncfeedspeeds.com/trade-specific-tools/speed-and-feed-calculator-metric/) — Metric speed and feed calculator for RPM, feed rate, chip load, cutting speed, MRR and unit conversions in CNC machining.
- [Speed and Feed Calculator App](https://cncfeedspeeds.com/trade-specific-tools/speed-and-feed-calculator-app/) — Use a browser-based speed and feed calculator app for CNC RPM, feed rate, chip load and machining calculations on desktop or mobile.
- [Speed and Feed Calculator for Tapping](https://cncfeedspeeds.com/trade-specific-tools/speed-and-feed-calculator-for-tapping/) — Tapping speed and feed calculator for RPM, thread pitch, synchronized feed and CNC tapping setup checks.
- [Speed and Feed Calculator Milling Aluminum](https://cncfeedspeeds.com/trade-specific-tools/speed-and-feed-calculator-milling-aluminum/) — Aluminum milling speed and feed calculator with chip-load, RPM, feed, engagement and setup guidance for CNC aluminum work.
- [Speed and Feed Calculator for Reamers](https://cncfeedspeeds.com/trade-specific-tools/speed-and-feed-calculator-for-reamers/) — Reamer speed and feed calculator for RPM, feed per revolution, hole sizing and finishing-reaming setup checks.
- [Carbide Depot Feed and Speed Calculator: Using Tool Data With an Independent Calculator](https://cncfeedspeeds.com/trade-specific-tools/speed-and-feed-calculator-carbide-depot/) — Independent guide for using Carbide Depot tool information with a CNC speed and feed calculator without treating generic values as manufacturer limits.
- [Drill Speed and Feed Calculator](https://cncfeedspeeds.com/trade-specific-tools/drill-speed-and-feed-calculator/) — Drill speed and feed calculator for drill RPM, feed per revolution, hole depth and CNC drilling setup checks.
- [Milling Speed and Feed Calculator — Free Download & Online Tool](https://cncfeedspeeds.com/trade-specific-tools/milling-speed-and-feed-calculator-free-download/) — Free milling speed and feed calculator page with online calculator plus a downloadable worksheet for CNC RPM, feed and chip load checks.
- [Lathe Speed and Feed Calculator](https://cncfeedspeeds.com/trade-specific-tools/lathe-speed-and-feed-calculator/) — Lathe speed and feed calculator for spindle RPM, feed per revolution, turning diameter and CNC lathe checks.
- [Tap Speed and Feed Calculator](https://cncfeedspeeds.com/trade-specific-tools/tap-speed-and-feed-calculator/) — Tap speed and feed calculator for thread pitch, TPI, RPM and synchronized tapping feed on CNC machines.
- [CNC Speed and Feed Calculator](https://cncfeedspeeds.com/trade-specific-tools/cnc-speed-and-feed-calculator/) — CNC speed and feed calculator for milling RPM, feed rate, chip load, engagement, MRR and machine-limit checks.
- [Turning Speed and Feed Calculator](https://cncfeedspeeds.com/trade-specific-tools/turning-speed-and-feed-calculator/) — Turning speed and feed calculator for CNC lathe RPM, cutting speed, feed per revolution and CSS checks.
- [Reamer Speed and Feed Calculator](https://cncfeedspeeds.com/trade-specific-tools/reamer-speed-and-feed-calculator/) — Reamer speed and feed calculator for finishing holes with RPM, feed per revolution, allowance and alignment checks.
- [Endmill Speed and Feed Calculator](https://cncfeedspeeds.com/trade-specific-tools/endmill-speed-and-feed-calculator/) — Endmill speed and feed calculator for RPM, feed, chip load, cutter diameter, flute count and milling engagement.
- [Carbide Drill Speed and Feed Calculator](https://cncfeedspeeds.com/trade-specific-tools/carbide-drill-speed-and-feed-calculator/) — Carbide drill speed and feed calculator for RPM, feed per revolution, holemaking setup and carbide-tool checks.
- [Kennametal Speed and Feed Calculator: How to Cross-Check CNC Values](https://cncfeedspeeds.com/trade-specific-tools/kennametal-speed-and-feed-calculator/) — Independent guide for cross-checking Kennametal speed and feed values with transparent CNC RPM and feed calculations.
- [Speeds and Feed Calculator](https://cncfeedspeeds.com/trade-specific-tools/speeds-and-feed-calculator/) — Speeds and feed calculator for CNC RPM, feed rate, chip load, cutting speed and MRR with operation-specific guidance.
- [Speed and Feed Calculator Turning](https://cncfeedspeeds.com/trade-specific-tools/speed-and-feed-calculator-turning/) — Speed and feed calculator for turning with workpiece RPM, feed per revolution, CSS and machine-limit checks.

## Material References

- [Aluminum Machining Reference](https://cncfeedspeeds.com/materials/aluminum/) — Aluminum varies by alloy and temper. Use the exact material condition with toolmaker cutting data, then calculate RPM and feed transparently.
- [Stainless Steel Machining Reference](https://cncfeedspeeds.com/materials/stainless-steel/) — Stainless grades differ in strength and work-hardening behavior. Match the exact grade with the cutter data and validate the setup.
- [Carbon & Alloy Steel Machining Reference](https://cncfeedspeeds.com/materials/carbon-and-alloy-steel/) — Steel cutting conditions change with hardness, alloy, heat treatment and tool grade. Use the material family as a starting classification, not a single universal value.
- [Titanium Machining Reference](https://cncfeedspeeds.com/materials/titanium/) — Titanium needs careful control of heat, engagement and rigidity. Use manufacturer data for the specific grade and cutter.
- [Brass & Bronze Machining Reference](https://cncfeedspeeds.com/materials/brass-and-bronze/) — Copper alloys vary from free-machining brass to tougher bronze families. Tool geometry and chip behavior influence the useful cutting range.
- [Cast Iron Machining Reference](https://cncfeedspeeds.com/materials/cast-iron/) — Cast irons differ in hardness, graphite structure and chip behavior. Manage abrasive wear, dust and tool condition as part of the setup.
- [Engineering Plastics Machining Reference](https://cncfeedspeeds.com/materials/engineering-plastics/) — Engineering plastics can melt, smear or deform if heat and chip evacuation are poorly controlled. The correct tool and cutting condition depend on polymer and feature.

## Machining Guides

- [How to Calculate CNC Feed Rate — Step-by-Step Guide](https://cncfeedspeeds.com/guides/how-to-calculate-cnc-feed-rate-guide/) — Step-by-step CNC calculation guidance with formulas, verification checks and practical setup context.
- [CNC Chip Load Guide](https://cncfeedspeeds.com/guides/chip-load-guide/) — Step-by-step CNC calculation guidance with formulas, verification checks and practical setup context.
- [How to Read CNC Feed & Speed Charts](https://cncfeedspeeds.com/guides/how-to-read-feed-speed-charts-guide/) — Step-by-step CNC calculation guidance with formulas, verification checks and practical setup context.
- [SFM and RPM Guide for CNC Machining](https://cncfeedspeeds.com/guides/sfm-rpm-guide/) — Step-by-step CNC calculation guidance with formulas, verification checks and practical setup context.
- [CNC Chatter Troubleshooting Guide](https://cncfeedspeeds.com/guides/troubleshooting-cnc-chatter-guide/) — Step-by-step CNC calculation guidance with formulas, verification checks and practical setup context.

## Technical Articles

- [How to Calculate CNC Feed Rate](https://cncfeedspeeds.com/blog/how-to-calculate-cnc-feed-rate/) — A practical guide to calculating CNC milling feed rate from spindle speed, flute count and chip load, with unit checks and verification steps.
- [Chip Load Explained: Feed per Tooth in CNC Machining](https://cncfeedspeeds.com/blog/chip-load-explained/) — Understand feed per tooth, how chip load is calculated, and how flute count and spindle speed change milling feed.
- [How to Read Feed and Speed Charts Without Misusing Them](https://cncfeedspeeds.com/blog/how-to-read-feed-and-speed-charts/) — A practical method for interpreting CNC cutting-data charts, matching units, and cross-checking chart values with transparent calculations.
- [What Is SFM in CNC Machining?](https://cncfeedspeeds.com/blog/what-is-sfm-in-cnc-machining/) — Learn what surface feet per minute means, how it relates to RPM and diameter, and when to use SFM versus metric cutting speed.
- [RPM vs Feed Rate: What Changes When Spindle Speed Changes?](https://cncfeedspeeds.com/blog/rpm-vs-feed-rate/) — Understand how spindle RPM and programmed feed interact, when feed should scale, and why machine limits change the calculation.
- [CNC Material Removal Rate Explained](https://cncfeedspeeds.com/blog/cnc-mrr-explained/) — Calculate and interpret material removal rate for CNC milling, including feed, radial engagement and axial depth.
- [Feeds and Speeds for Aluminum: How to Build a Starting Point](https://cncfeedspeeds.com/blog/feeds-and-speeds-for-aluminum/) — Build an aluminum milling starting point from toolmaker cutting speed and chip load, then verify engagement, chip evacuation and machine limits.
- [Feeds and Speeds for Stainless Steel: A Practical Framework](https://cncfeedspeeds.com/blog/feeds-and-speeds-for-stainless-steel/) — A calculation-first framework for stainless steel machining that emphasizes tool data, chip thickness, rigidity and heat control.
- [CNC Tool Stick-Out, Rigidity and Chatter](https://cncfeedspeeds.com/blog/cnc-tool-stickout-and-chatter/) — Understand why tool stick-out and system rigidity affect usable CNC cutting conditions, and how to troubleshoot chatter systematically.
- [Carbide vs HSS: How Tool Material Changes Cutting Data](https://cncfeedspeeds.com/blog/carbide-vs-hss-cutting-speed/) — Compare carbide and HSS cutting-data considerations and learn how tool construction changes the starting cutting condition.

## Usage notes

- Calculator outputs are mathematical starting points.
- Verify toolmaker data, material condition, engagement, machine limits, workholding and actual cutting conditions.
- Prefer the dedicated page that matches the machining operation and calculation.