Widin Co.,Ltd

Product

General Data

Endmill

Endmill’s concept

Endmill’s concept

Cutting speed calculation

Cutting speed calculation

Endmill Regrinding

Regrinding timing

Range of application	Endmill Dia	Abrasion loss
Finish machining	~ ø10 ø 11 ~ ø30 ø 31 ~ ø50	0.05 ~ 0.1 0.1 ~ 0.25 0.2 ~ 0.35
Roughing machining	~ ø10 ø 11 ~ ø30 ø 31 ~ ø50	0.08 ~ 0.15 0.15 ~ 0.35 0.3 ~ 0.45

Way to regrinding

⁰¹Concave type: Demand to close Dia tolerance; Favorable machinability; Need to 2nd rake Clearance angle

⁰²Concave type: Favorable machinability; Need to 2nd rake Clearance angle

⁰³Eccentric Type: Favorable Flute Diameter; Excellent Surface Roughness on workpiece; Not necessary for secondary clearance on rake

Honing

Honing: Recommended for machining mold steel or high hardness workpiece.; When machining without honing, process it for 10 to 30 seconds with an slotting of 0.01mm or less before entering the normal speed.

Endmill trouble shooting

Endmill trouble shooting

Troble issue	Cause	Solution
Broken	Excessive feed speed be more than necessary Excessive Depth of cut bemore than necessary Excessive protrusion graved flute wear Excessive flue length be more than necessary	Reduce feed speed. Reduce Depth of cut Reduce protrusion Regrinding Reduce flute length to the maximum
Wear and burr	Excessive cutting speed shortage of rake angle high hardness for workpiece	Reduce cutting speed with supply with cutting oil. Modify for rake angle properly Supply with cutting oil and surface treatment below one by one
Vibration during cutting	Unsuitable cutting condition Shortage of hardness for machine and chuck Poor fixed for workpiece. Excessive protrusion. Excessive 1st Clearance angle.	Modify for cutting speed and feed rate. Change to machine or chuck. Fixed for workpiece solidly. Reduce for cutting length and protrusion length to the maximum. Reduce 1st Clearance angle.
Defection for flute	Excessive feed speed be more than necessary Shortage of rake angle. Occur to vibration. Poor fixed for workpiece. Excessive Depth of cut be more than necessary. Excessive protrusion. Shortage of hardness for machine.	Reduce feed speed. Modify the angle properly. Reduce the RPM. Fixed for workpiece solidly. Reduce Depth of cut. Reduce protrusion. Change to machine and work.
Bad cutting performance	Cutting edge wear. Improper endmill for workpiece. Shortage of rake angle.	Regrinding Change to endmill properly Modify for rake angle
Poor chip emission	Shortage for spray pressure or lack of oil level. Small chip pocket. Cutting flute wear Excessive Depth of cut be more than necessary.	Increase flow rate and pressure. Use to small flute endmill or reduce feed speed. Regrinding. Reduce Depth of cut.
Burr on the surfacce	Excessive feed speed be more than necessary Be slow cutting speed Cutting flute wear. Excessive Depth of cut be more than necessary.	Reduce feed speed Modify for cutting speed rapidly. Regrinding. Reduce Depth of cut.
Shape faulty	Durability fault for machine and chuck. Hardness fault for machine. Over flute length. Lack the number of flute.	Repair to machine and chuck. Change to machine and chuck. Modify for flute length properly. Change to endmill with a lot of flute.
Built up edge	Lack of affinity between workpiece and tool and shortage of cutting oil	Spray to oil below one by one dry > water solubility > non-water-soluble. Active non-water-soluble coolant is suitable when cutting alloy steels.

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