Larger corner radii reduced CNC machining cost

Generally speaking, pockets with a depth greater than 5 times the smallest corner radius adds a premium to the CNC machining cost. See the spare part of video camera monitor described below. We would have to use a .250″ diameter flat end mill with a 1.25″ length of cut, when is a very fragile cutter. To avoid the end mill damaged on occasion, that means the CNC machining processing will be slow. Furthermore, due to the deflection of such a long small diameter cutter, it is difficult to make the wall perfectly vertical and the corners free of chatter.


CNC Machining Key Advice

» Try to keep your radii on inside corners bigger than 1/6th the pocket depth.

CNC Machining Inside corner radius .125
Inside corner radius .125″ with a depth 1.25″ of cut


The procedures involved in CNC machining parts?

Below showed how we manufacture customized parts step by step from print to part at APPORO:

1.) Checking and Confirming Drawings

Till today, we already have experience with checking and confirming more than ten thousand CAD drawings. You are to receive our feedback if there are any problems opening the drawing files or other obvious issues:

a.) To receive a “no quote” if the part is outside APPORO’s capabilities.

b.) To receive suggestions for ways to improve design for production, also to reduce cost without losing functionality.

c.) To receive a quote with the shortest possible lead time for delivery.

2.) CNC Programming

Our professional CNC programmers use PC-based CAD/CAM software Mastercam for fast and efficient turning/milling. During this stage, we keep looking for better way to optimize design for production.

3.) CNC Production

Following instruction of CAM software, step by step well manufactured via CNC milling machine centers while our production lines are capable of 2 axis, 3 axis, 4 axis and 5 axis machining. From simple dowel pins, shaft to complex CNC turning and milling parts, we have got you covered.


Finally, with more than 30 years of success, we are one of the premier CNC precision machining services in the world. If you send us your parts CAD drawings to get a free quote, our engineer will review your project to ensure the manufacturability. We will also provide CAD design suggestions for your better production.