[{"data":1,"prerenderedAt":25},["ShallowReactive",2],{"content-cnc-feeds-speeds-en":3},{"about":4,"steps":7,"faq":12},[5,6],"When milling, spindle speed and feed rate follow from two values that tool manufacturers specify: the cutting speed vc (how fast the cutting edge moves through the material in m\u002Fmin) and the feed per tooth fz (how thick the chip of each flute is). They give the spindle speed n = vc × 1000 \u002F (π × d) and the feed rate vf = n × flutes × fz.","If the spindle cannot reach the required speed, the tool continues with the maximum speed and adjusts the feed so that the chip load stays the same. With depth and width of cut it also shows the material removal rate. In the second mode you check the other way round which cutting speed and chip load your machine settings result in.",[8,9,10,11],"Enter the tool diameter and the number of flutes.","Enter cutting speed and feed per tooth from the manufacturer’s data, or pick a starting value for your material.","Enter your spindle’s maximum speed and optionally depth and width of cut.","Read spindle speed, feed rate and removal rate, or check your settings in the second mode.",[13,16,19,22],{"q":14,"a":15},"Where do I get cutting speed and feed per tooth from?","Ideally from the manufacturer of the end mill, who provides tables for different materials. The starting values in the tool are cautious guide values for carbide end mills of about 3–6 mm on hobby machines; smaller cutters usually need a smaller feed per tooth.",{"q":17,"a":18},"Why shouldn’t I just mill more slowly?","If the feed is too low for the spindle speed, the edge no longer cuts a chip but rubs. That heats the cutter, burns wood, melts plastic and dulls the tool faster. It is better to lower spindle speed and feed together.",{"q":20,"a":21},"What does the limit by the maximum spindle speed mean?","Small cutters would often need more than the 24,000 rpm of a typical spindle for the full cutting speed. The calculator then uses the maximum speed, calculates the feed with the same chip load and shows the cutting speed actually reached.",{"q":23,"a":24},"Does this apply to 3D printers or lasers too?","No, cutting data only applies to cutting tools. For print speeds in 3D printing there is the [[volumetric-flow-calculator]], for the steps per mm of axes the [[steps-per-mm-calculator]].",1793721090076]