Graduate Research Papers


Open Access Graduate Research Paper


Coated hardmetals have brought tremendous increases in productivity since 1969, when they were first applied to cutting materials. These coatings are extremely hard and are very abrasion resistant. Typical coatings are alumina oxide, silicon nitride with metal oxides, titanium carbonnitrides with metal carbides, titanium nitride, titanium carbonitride, and zirconium oxide. This study examined two different coated cutting inserts to determine which would maximize performance for lathe operators.

The two chemical vapor deposition (CVD) coated indexible inserts examined were Carboloy CMNA 543 TP 100, and Carboloy CNMA 543 TP 10. Both cutting inserts were multi-coated with alumina (Al2O3 ), titanium nitride (TiN), titanium carbide (TiC), and titanium carbonitride (TiCN). CNMA 543 TP 10 had more TiN in its top coat. A comparison was made to determine ways to make it easier for lathe machine processors and operators to choose cutting inserts that maximize performance when cutting gray cast iron on high speed CNC lathe machines under specific manufacturing conditions at John Deere Drive Train, Waterloo, Iowa.

This study was conducted under actual production conditions during regular scheduled production shifts, using two CNC lathes. Lathe spindle speed parameters were set at 800 surface feet per minute with a feed rate of .012 inches per revolution. CNMA 543 TP 10 and CNMA 543 TP 100 cutting inserts were used to rough cut gray cast iron. A comparison was made between a 100 % cycle time and a 120 % cycle time. This study concluded that under specific conditions, the CNMA 543 TP 10 cutting insert showed better performance than the CNMA 543 TP 100 cutting insert.

Year of Submission

Spring 1996

Degree Name

Master of Arts


Department of Industrial Technology


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Date Original

Spring 1996

Object Description

1 PDF file (37 pages)



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