US Knife 16IR ER 8ACME 10 12 Counterbore Drills 29 Degree Ladder Thread Insert
This 16-series 29° trapezoidal threading insert covers 16ER external and 16IR internal thread models, available in 8ACME, 10ACME and 12ACME American standard ACME sizes. It delivers stable cutting performance for precision trapezoidal thread machining of carbon and alloy steel on CNC lathes.
Precision-ground ACME thread profile ensures strict dimensional accuracy and smooth flank surface finish. The optimized cutting edge geometry achieves reliable chip control during threading, effectively reducing cutting force and minimizing burrs in mass production.
Fully compatible with standard 16ER/16IR threading tool holders, these carbide inserts enable quick indexing to reduce machine downtime. With excellent wear resistance and long service life, they are widely applied in transmission, machinery and hardware industries.
