SUMITOMO ELECTRIC AC4000K Cast Iron Turning Selection Guide

AC4125K is a newly launched brand designed for strong intermittent machining and unstable working conditions of cast iron. Through the evolution of high adhesion technology, fine crystal orientation control technology, and residual stress control technology, AC4125K has demonstrated excellent anti chipping performance. When processing parts such as differential housing and carrier, AC4125K can effectively cope with heavy intermittent cutting. Its golden coating design makes the used blade tips easy to identify, making it convenient for operators to quickly replace them. In the testing of intermittent cutting of ductile iron, the cutting time of AC4125K is more than 1.5 times that of conventional K20 tools, and the degree of chipping is significantly lighter.

In terms of chip breaker selection, the AC4000K series offers a wide range of options. For low rigidity workpieces (such as slender shafts), EGU chip breakers are an ideal choice, as their low resistance design can effectively suppress vibration. For precision machining conditions, the ENZ chip breaker has both sharpness and strength. For general machining, EGZ chip breaker is the preferred recommendation, as its excellent cutting edge strength and high versatility can handle most working conditions. For high feed rough machining, the EME chip breaker provides extremely high strength while maintaining sharpness. For large cutting depths and intermittent machining, the chip free groove model provides the most outstanding cutting edge strength.

Practical Case Verification: Cross industry Processing Performance Comparison

To verify the performance of the AC4000K series in actual production, we conducted in-depth analysis by combining real processing cases from multiple industries. These cases cover multiple high-end manufacturing fields such as automotive brake discs, differential housings, and gearbox housings, fully demonstrating their excellent performance under different working conditions.

1. Turning of brake disc end face (gray cast iron)

In the end face turning of the No 35B brake disc, CNMG432EGZ-AC4010K tool was used with cutting parameters of vc=3150 SFM, f=. 030 IPR, ap=. 079 ". Compared with competitor A, AC4010K achieved a 1.4-fold increase in tool life (70 pieces vs 50 pieces) and minimal wear. Competitor A showed significant wear on the back cutting surface after processing 50 pieces, while the wear amount of AC4010K was only Vbmax. 011 ". For mass-produced parts such as brake discs, the high wear resistance of AC4010K can significantly reduce tool changing frequency and improve production efficiency.

2. Differential housing end face turning (ductile iron)

In the end face turning of ductile iron differential housing, WNMG433EGZ-AC4015K tool was used with cutting parameters of vc=820 SFM, f=. 012 IPR, ap=. 079 ". Compared with competitor D, AC4015K achieved a 1.4-fold increase in tool life (60 pieces vs 45 pieces). Under heavy intermittent cutting conditions, the anti chipping performance of AC4015K is particularly outstanding. Competitor D showed significant chipping and wear after processing 45 pieces, while the cutting edge of AC4015K remained intact. For parts such as differential housings that require extremely high dimensional accuracy, the stability of AC4015K can ensure long-term consistent machining quality.

3. External turning of differential housing (high-strength ductile iron)

When processing high-strength ductile iron differential housing, CNMG543EGU-AC4125K cutting tool was used with cutting parameters of vc=525 SFM, f=. 008-018 IPR, ap=. 098-1118 ". Compared with competitor G, AC4125K achieved a 1.5-fold increase in tool life (17 pieces vs 11 pieces). Under heavy intermittent cutting conditions, AC4125K exhibited excellent anti chipping performance, while competitor G experienced severe chipping after processing 11 pieces, while the cutting edge of AC4125K remained stable. For difficult to machine materials such as high-strength ductile iron, the toughness advantage of AC4125K can effectively solve the problem of blade breakage and improve the stability of the production line.

4. End face turning of gearbox housing (80-55-06 ductile iron)

In the end face turning of the 80-55-06 gearbox housing, CNMG432EME-AC4015K tool was used for rough machining with cutting parameters of vc=720 SFM, f=. 014 IPR, ap=. 059 ". Compared with competitor E, AC4015K achieved a 1.2-fold increase in tool life (12 pieces vs 10 pieces). The EME chip breaker has demonstrated excellent chip breaking ability in rough machining, with good chip control and no entanglement phenomenon. For parts such as gearbox housings that require deep cutting and rough machining, the combination of AC4015K and EME chip breaker can effectively improve machining efficiency.

5. Flywheel end face turning (ductile iron)

In the end face turning of ductile iron flywheel, WNMA432-AC4015K tool was used with cutting parameters of vc=755 SFM, f=. 012 IPR, ap=. 079 ". Compared with competitor F, AC4015K still maintained minimal wear after processing 80 pieces, while competitor F only showed significant wear after processing 40 pieces. The wear resistance advantage of AC4015K is particularly significant in mass production, which can significantly reduce the cost of single piece processing.