Internal Thread G85 & G31 + Undercut DIN76, PAL G-Code (Video)
In this video, we guide you step by step through Task 6 from the Christiani task collection “CNC Turning Technology according to PAL2020”. Thanks to our 3D simulation in SYMplus™, everything is explained clearly and understandably.
What to expect in the video:
✅ Thread programming made easy with G31
✅ Clean undercuts with G85 – DIN 76 compliant
✅ Roughing & finishing cycles – precise and efficient
Who is this video for?
Perfect for CNC programmers, machinists, and instructors looking to improve their G-code programming skills for CNC turning.
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Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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Cutting Threads G85 & G31 + Undercut DIN76, PAL G-Code (Video)
In this video, we guide you step by step through Task 5 from the Christiani task collection “CNC Turning Technology according to PAL2020”. Thanks to our 3D simulation in SYMplus™, everything is explained clearly and understandably.
What to expect in the video:
✅ Cutting threads with G85 and G31
✅ Undercut according to German DIN76 in CNC turning
✅ Precise application of roughing and finishing cycles for threads
Who is this video for?
Perfect for CNC programmers, machinists, and instructors looking to improve their G-code programming skills for CNC turning.
Subscribe to our channel to not miss out on more tutorials and tips:
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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Internal Machining: Facing, Drilling & Rough Turning, PAL G-Code (Video)
In this video, we guide you step by step through Task 4 from the Christiani task collection “CNC Turning Technology according to PAL2020”. Thanks to our 3D simulation in SYMplus™, everything is explained clearly and understandably.
What to expect in the video:
✅ Precise internal machining with G1, G84, and G81 in PAL G-Code
✅ Efficient facing, drilling, and rough turning for internal contours
✅ Practical application of cycles for CNC turning
Who is this video for?
Perfect for CNC programmers, machinists, and instructors looking to improve their G-code programming skills for CNC turning.
Subscribe to our channel to not miss out on more tutorials and tips:
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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RN & AS Addresses: Fillets, Chamfers, Taper Angles (Video)
In this video, we guide you step by step through Task 2 from the Christiani task collection “CNC Turning Technology according to PAL2020”. Thanks to our 3D simulation in SYMplus™, everything is explained clearly and understandably.
What to expect in the video:
✅ Easy programming of fillets & chamfers with RN
✅ Define taper angles directly with AS – no manual calculation needed
✅ Efficiently creating turning contours with PAL G-code
Who is this video for?
Perfect for CNC programmers, machinists, and instructors looking to improve their G-code programming skills for CNC turning.
Subscribe to our channel to not miss out on more tutorials and tips:
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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CNC Turning of a Tool Holder with Driven Tools
Discover our latest CNC video: Axial grooving, key surfaces and T-slot (with Driven Tools) now on YouTube!
In this video, we guide you step by step through Task 10 from the Christiani task collection “CNC Turning Technology according to PAL2020 with Driven Tools”. Thanks to our 3D simulation in SYMplus™, everything is explained clearly and understandably.
What to expect:
- Planning, drilling, roughing, etc.
- A cross drilling with G19 IP0
- Finishing (internal and external)
- Drilling cycle with G86
- 2 grooves on the chord and face surfaces
- Stay up to date!
Subscribe to our YouTube channel so you never miss out on practical tips. Subscribe now – free and with just one click: https://www.youtube.com/@CNCKELLERGmbH
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

This might also be of interest to you
Axial grooving, key surfaces and T-slot (with Driven Tools)
Discover our latest CNC video: Axial grooving, key surfaces and T-slot (with Driven Tools) now on YouTube!
In this video, we guide you step by step through Task 9 from the Christiani task collection “CNC Turning Technology according to PAL2020 with Driven Tools”. Thanks to our 3D simulation in SYMplus™, everything is explained clearly and understandably.
What to expect:
- Axial turning G88 made easy
- Machining key surfaces: G15 G19 IP5
- How to use the virtual Y-axis effectively
- Tips for two-side machining and T-slot milling
- Stay up to date!
Subscribe to our YouTube channel so you never miss out on practical tips. Subscribe now – free and with just one click: https://www.youtube.com/@CNCKELLERGmbH
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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What was in the Cutting Machine Operator Exam? (Winter 2024)
What was included in the machining exam? If you took the exam or are preparing for the upcoming one, you can watch the simulations of the machined exam pieces on our YouTube channel!
Note: These videos are available in German only.
- Interested to see it? Click on this link to watch the video: https://www.youtube.com/@CNCKELLERGmbH
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

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Milling Grooves on the Face – How to Get It Right with Driven Tools
Using the 3D simulation of our SYMplus™ CNC software, we will show you how task 8 from Christiani’s “Collection of tasks in CNC Milling technology according to PAL2020 with Driven Tools” could look like in reality.
This task includes:
- Milling on the face (driven tools)
- Round groove, cycle G75
- 2 rectangular pockets, concentric to the groove’s starting semicircle
- 2-sided machining
- T-slot cutter
- Interested to see it? Click on this link to watch the video: https://www.youtube.com/@CNCKELLERGmbH
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

This might also be of interest to you
New video on YouTube: Face Milling: Drilled Hole Circle (8 Holes) with Driven Tools
Using the 3D simulation of our SYMplus™ CNC software, we will show you how task 7 from Christiani’s “Collection of tasks in CNC Milling technology according to PAL2020 with Driven Tools” could look like in reality.
This task includes:
- Roughing cycle with D-plateDrilled Hole Circle with 8 holes (face milling)
- Virtual Y-axis
- Two-sided machining
- Interested to see it? Click on this link to watch the video: https://www.youtube.com/@CNCKELLERGmbH
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!

This might also be of interest to you
New video on YouTube: Turning a Sleeve with Rectangular Cutouts, C+Y Axis
Using the 3D simulation of our SYMplus™ CNC software, we will show you how task 6 from Christiani’s “Collection of tasks in CNC Milling technology according to PAL2020 with Driven Tools” could look like in reality.
This task includes:
- Plan turning, drilling, roughing, finishing
- Grooving G86
- Rectangular pocket cycle G72 with program part repetition
- Milling on a chord face (G15 G19 IP3)
- Interested to see it? Click on this link to watch the video: https://www.youtube.com/@CNCKELLERGmbH
Do you have any questions?
Our experts are at your disposal. We look forward to your inquiry!
