a slight increase in the cutting speeds. The machining parameters listed in the tables apply to large tool cutting edge angles from about 70° to 90°.

When maximum speed of the machine spindle less than value of recommended milling conditions, adjust conditions by calculation as follows.

This paper presents an investigation on the characteristics of damaged layer in micro-machining by using the ultrahigh-speed air spindle.

N = spindle speed [rpm] f. r = feed per revolution of the drill [in/rev] In addition, the following rules of thumb should be observed when applicable: • Always . start with a slower speed (~50%) and build up to the maximum after trials indicate the job can run faster. • Overloading the drill bit by feeding too quickly in Z will result in an

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tics of all copper beryllium alloys, cutting tool life is excellent. Normally the tool life end point is a wear land of 0.060 inch for high speed.

Some other factors that affect the surface finish of copper during the milling process are tool selection, chip load, lubrication, cutting speed 

note : all speeds and feeds listed here are provided for reference only. formula for computing table speed is..001 x number of teeth in cutter x rpm example cutting aluminum with a 3/4" key

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Cutting speeds are usually given in feet or meters per minute and these speeds must be converted to spindle speeds, in revolutions per minute, to operate the machine. After changing variables Click in this area space or "Recalculate" to see

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