fractional chart Use this for prototyping a complex machining process or to make moulds for casting. Dimitri. For deeper cuts, it is necessary to reduce the chipload as follows: Cut depth 2x Tool Diameter reduce chipload by 20-25%Cut depth 3x Tool Diameter reduce chipload by 40-50%. Based on a tool diameter of ...", use a stepover of ..." or less. Calculation are as follows: Chip Load = Feed Rate (inches per minute) / (RPM x number of flutes). Looking for a chip load calculator Post by Bob Reda » Mon Oct 22, 2012 10:57 am I can find some for metal but looking for a program to determine the chip load for wood and wood composites. With the smallest chiploads (like 0.001" or even 0.002"), it is possible for the blade to just mash the material underneath and never create a chip, especially if the end mill is dull. Requires iOS 7.0 or later. If you disable this cookie, we will not be able to save your preferences. Softer plastic, good for prototyping or for parts that can/should be very flexible. Our staff will be happy to answer any technical questions regarding cnc router bits or cutters by phone or email. If this happens, you must use a larger chipload to prevent overheating (including fire! Requires iOS 7.0 or later. Spindle speed = ${Surface~Speed~(ft/min) \over \pi * \frac{1}{12} * Tool~Diameter~(inches)}$ =. Compatible with iPhone,... Milling Speed and Feed calculator for both Composites and Metals Chip load Chip loads are provided as ranges. Designed for CNC Router operators, our Chip Load Calculator allows you to quickly and easily calculate feeds and speeds based on your bit selection, RMP, and substrate.