CNC Broach Tools – Experimental Spline G-code Program Generator

Find more useful Programming info below:

• Broaching Speeds and Feeds
• Keys to programming CNC Broach Tools
• Sample Programs

To use the Experimental CNC Spline Broach Tool Program Generator:

1. Choose your machine type: Lathe or Mill. 
2. Choose between Inch or Metric
3. Select the type of program you want to export: Long format or Sub Program (Recommend Sub Program)
4. Select which tool you’d like to use
5. Select the Control Type & Control specifc or Index specific parameters
6. Enter Spline Requirements and Z start & endpoints
7. Select the depth of cut and feedrate using the sliders
8. For milling machines enter the feed axis and feed direction
9. Accept the Terms & Conditions
10. Download the code and paste it into your program
11. Try the full version of CNC Machinist Calculator Ultra.

⚠️ USE WITH CAUTION: BETA VERSION – This Spline Program Generator is currently in testing and is provided “AS IS”. CNC machining carries inherent risks. You are solely responsible for verifying, simulating, and proving out the generated G-code before running it on a physical machine. We accept no liability for machine damage, scrapped parts, or injury. Please use this for reference only and provide feedback so we can improve the tool!

Z axis start point: The start point should be at least .625″ above the bore face to allow for acceleration prior to cutting.

Z axis end point: The end point must clear the back face of the bore by at least .200″. This is important because some machines will actually begin to retract on X or Y prior to reaching the Z end point. This “Phantom Retraction” could cause the insert to pull out of the pocket. The insert must be completely through the material in the Z axis prior to retracting on X or Y. One way to avoid the “Phantom Retraction” is to add an exact stop g-code to your program. This will slow your broach cycle considerably, however. This is why we recommend extending the Z axis end point instead. More information on this can be found in our blog post titled “Keys to using CNC Broach Tools” in the Questions and Answers section