Uploaded May 2026 | Updated September 2026, 1 hour ago
In chapter 1 lesson 4, we break down feeds and speeds and how they directly impact both your design and the cost of your parts.
We’ll introduce key concepts like RPM, inches per minute, chip load, and surface feet per minute, and explain how they all work together when an end mill interacts with material. From there, we’ll walk through how to calculate feed rate, what happens when you push things too fast or too slow, and how these decisions affect tool life, surface finish, and machining time.
What you’ll learn in this episode:
• What RPM, feed rate, chip load, and surface speed mean
• How these values work together during cutting
• How to calculate feed rate and understand machining time
• The risks of running too fast or too slow
• How feeds and speeds impact cost, quality, and tool life
By the end of this lesson, you’ll understand how cutting parameters influence performance and cost, helping you design parts that are efficient to machine and optimized for real world production.
⏰ Timestamps ⏰
00:00: Intro
00:38: Equation vocabulary
04:24: Example equation
07:03: Understanding the equations in CAD
09:20: What you'll learn next lesson
Stay tuned for more SendCutSend Education.
Want to rock the same gear as Jake? Grab your SendCutSend merch here: store.sendcutsend.com
Custom sheet metal manufacturing and processing. From prototype to large production runs, get sale and assembly ready custom parts shipped in as little as 2 days; No minimum quantities; free US shipping on orders over $39; made In the USA: bit.ly/4dwW6rU
Follow us on Instagram: instagram.com/sendcutsend
SendCutSend Education was filmed by Keaton Bowlby.
In chapter 1 lesson 4, we break down feeds and speeds and how they directly impact both your design and the cost of your parts.
We’ll introduce key concepts like RPM, inches per minute, chip load, and surface feet per minute, and explain how they all work together when an end mill interacts with material. From there, we’ll walk through how to calculate feed rate, what happens when you push things too fast or too slow, and how these decisions affect tool life, surface finish, and machining time.
What you’ll learn in this episode:
• What RPM, feed rate, chip load, and surface speed mean
• How these values work together during cutting
• How to calculate feed rate and understand machining time
• The risks of running too fast or too slow
• How feeds and speeds impact cost, quality, and tool life
By the end of this lesson, you’ll understand how cutting parameters influence performance and cost, helping you design parts that are efficient to machine and optimized for real world production.
⏰ Timestamps ⏰
00:00: Intro
00:38: Equation vocabulary
04:24: Example equation
07:03: Understanding the equations in CAD
09:20: What you'll learn next lesson
Stay tuned for more SendCutSend Education.
Want to rock the same gear as Jake? Grab your SendCutSend merch here: store.sendcutsend.com
Custom sheet metal manufacturing and processing. From prototype to large production runs, get sale and assembly ready custom parts shipped in as little as 2 days; No minimum quantities; free US shipping on orders over $39; made In the USA: bit.ly/4dwW6rU
Follow us on Instagram: instagram.com/sendcutsend
SendCutSend Education was filmed by Keaton Bowlby.
