Threaded insert C24

stainless steelsteelcarbide

Center Drill 90 & deg; (type-C): When using a drill which size is smaller than the upper chamfering hole, this center drill helps making a center positioning hole and chamfering in single pass prior to drilling and tapping, no extra chamfering process required. Features Ra 0.36 surface finishing on the chamfering surface. Designed in almost zero eccentric, maximum eccentricity ± 0.008mm. Multifunction: Center Positioning + Corner Chamfering The feed speed and tool life are both 4 ~ 8 times greater than solid HSS center drills. Patented foolproof design, the operator can replace inserts without removing shanks from machine and re-centering, still performs ultimate center positioning accuracy. Designed with unique geometry angle on the center engage point which decrease cut resistance and eccentricity, gives excellent center precision and contributes tool life many times better than HSS center drills. Use Tialn on surface coating to the grade for steel and stainless steel materials, it helps in decrease the attrition rate of drill bits and extends the life time. For long deep drilling, it is suggested to perform a peck drilling for improving life time of the indexable carbide drill bit.