Tap taps are used to machine threads in the bore. Tip: The round nose cutter is very effective when machining rounded corners between the wall and the bottom. Moreover, the strength of the end mill can be increased. When machining hard materials, the sharp end of the standard end mill is prone to chipping and wears faster than round nose end mills. The radius of the round nose end mill is more gentle when cutting into the workpiece. Previous Next Double Row Deep Groove Ball Bearing,Double Row Tapered Roller Bearing,Double Row Cylindrical Roller Bearing,Double Row Roller Bearing Ningbo DeNeu Imp. & Exp. Co., Ltd , https://www.deneucn.com
Note: Special care must be taken when tapping with a milling machine. 
Tip: If you are using a machine that can perform rigid tapping, the feed rate (inches per minute) = pitch x rpm. In addition, the tapping size must not exceed the outer diameter of the 1.5 x tap. If the contact length exceeds 1.5 times the diameter of the fastener, the strength of the threaded connection will not increase. If you need to increase the thread depth, first use the machine tapping and then manually tap to the final depth. If the depth exceeds the 1.5 x aperture, the possibility of tap breakage is greatly increased. Chip control is more difficult. When tapping a blind hole, it is necessary to drill as far as possible to the maximum depth to avoid squeezing the chips under the tap. Use spiral groove taps to carry the chips out of the threaded holes. To further reduce the difficulty of tapping, ensure that all holes that require tapping are free of chips and use a tapping fluid that is specific to the material being machined.
Hint: The tap hole size is the aperture specified for a particular tap. For a 75% effective thread, the formula used to determine the correct hole size is:
D – 1/N, where D = tapped outer diameter N = threaded hole with 75% thread pitch per inch, strength is only 5% lower than threaded hole with 100% thread depth, and cutting force is only 1/3 .
The end mill end mill has a shape similar to a drill but has a flat bottom. It is mainly used for cutting the side of the tool and machining the contour of the workpiece. 
Note: When programming with the tool offset function (G41 and G42), it is very flexible to adjust the size of the machining part when performing end mill contour cutting or pocket tool path. Use the tool compensation function to adjust the amount of material cut. When the end mill wears, a small amount of offset adjustment ensures that each part has the same dimensions. You can also use different sizes of cutter heads to allow the machine to cut the same part size along the original tool path.
Round nose end mills are the same as conventional end mills, but have a radius at the corner where the groove intersects the bottom of the end mill. This radius can be up to half of the tool diameter. 