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Successful CNC routing is evaluated by how well and how long your tool cuts. Cutting successfully will give you outstanding part finish and long tool life between sharpenings if the tools are being used to their optimum performance. This requires managing the chipload.
Chip load is simply defined as the thickness of a chip which is formed during the machining of a material. Chip load is critical because if the chip is the proper size, it will carry away the heat promoting tool life. If the chip is too small, the heat is transferred to the cutting tool causing premature dulling. Too high of a chipload will cause an unsatisfactory edge finish, or part movement.
To increase Chip Load:                           To decrease chip load:
Increase the feed rate                                   Decrease the feed rate
Decrease the RPM                                        Increase the RPM
Use less flutes                                                Use More Flutes
Click on the appropriate material below to download a suggest chip load chart for the material you are machining. follow the instructions and use the formulas to deturmine the best RPM and feed rate for your application.
Need Help? Give us a call.


soft plywood

hard plywood

soft wood


laminated particleboard


laminated plywood

hard plastic

soft plastic

solid surface


specialty tools


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1. Find the cutting  data for the material being cut.
2. Find the series number of the selected tool under the series column
3. move accross until you find the cutting edge diameter of the tool
4. note the chip load
chip load =
feedrate / (RPM X # of cutting edges)
feed rate (IPM) =
RPM X # of cutting edges X chipload
speed (RPM) =
feedrate / (# of cutting edges X chipload) 

Need to convert from inches per minute to meters per minute?
Use this handy calculator.