SUMITOMO AC8000P steel turning selection and troubleshooting

High carbon steel, high alloy steel (above 180HB)

For precision machining, it is recommended to use AC8115P in conjunction with EFE, with a cutting depth of 0.004-0.047 inches, a feed rate of 0.004-0.016 IPR, and a speed of 459-1476 SFM. General processing recommendation: AC8025P with EGU, cutting depth of 0.031-0.197 inches, feed rate of 0.004-0.018 IPR, speed of 394-984 SFM. For rough machining, it is recommended to use AC8020P with EMU, with a cutting depth of 0.071-0.236 inches, a feed rate of 0.008-0.024 IPR, and a speed of 328-984 SFM. We recommend using AC8035P with EUX for heavy intermittent cutting, with a cutting depth of 0.031-0.197 inches, a feed rate of 0.006-0.018 IPR, and a speed of 295-558 SFM.

Practical case verification

The following examples demonstrate the actual performance of the AC8000P series in different steel processing.

AC8115P case: 4140 rotor shaft and P110 tube

In the rough machining of the 4140 rotor shaft, TNMG433EMU-AC8115P tool was used with cutting parameters of vc=721 SFM, f=0.0157 IPR, ap=0.098 inches, wet cutting to suppress crescent wear and extend tool life by 1.3 times. In the processing of P110 tube, CNMG544EEM-AC8115P tool was used, with vc=607 SFM, f=0.0236 IPR, ap=0.157 inches. Under heavy load processing, the tool life was extended by 1.3 times. In another process of the 4140 rotor shaft, DNMG443EGE-AC8115P tool was used with vc=1017-1115 SFM, f=0.0157 IPR, ap=0.039-0.098 inches, resulting in a 2-fold extension of tool life. In the rough machining of the 1038 motor shaft, CNMG432EME-AC8115P tool with vc=919 SFM, f=0.0197 IPR, ap=0.079 inches was used to effectively suppress chipping and front face wear. In the processing of H13 mold, CNMG423EGE-AC8115P tool was used, with vc=394 SFM, f=0.0079 IPR, ap=0.059 inches, resulting in less wear under the same processing time.

AC8025P case: 1045 steel shaft end and 5115 steel ring gear

In the machining of the 1045 steel shaft end, CNMM434ENP-AC8025P cutting tool was used, with vc=590-655 SFM, f=0.017-0.022 IPR, ap=0.04-0.12 inches, and minimal wear on the crescent groove. A total of 150 pieces were machined. In the machining of 5115 steel ring gears, WNMG434EME-AC8025P tool with vc=820 SFM, f=0.012-0.018 IPR, ap=0.04-0.1 inches is used, and the tool life is extended by 1.5 times. In the processing of 4120 steel, DNMG442EEM-AC8025P cutting tool was used with vc=500 SFM, f=0.016 IPR, ap=0.16 inches, minimal damage, and 100 pieces were processed. In the processing of the soft steel front cover, TNMG332EFE-AC8025P cutting tool is used, with end face vc=1475-1575 SFM and inner hole vc=1310 SFM, extending the tool life by 1.3 times. In the processing of 4320 steel liner, CNMG434EME-AC8025P cutting tool was used, with vc=850 SFM, f=0.019-0.039 IPR, ap=0.06 inches, excellent wear on the back cutting surface, and 200 pieces were processed.

AC8035P case: 1035 steel planetary gear and hot-rolled steel flange

In the intermittent machining of 1035 steel planetary gears, CNMG433EUX-AC8035P tool was used, with vc=590 SFM, f=0.012 IPR, ap=0.080 inches, and the tool life was extended by 1.5 times. 300 pieces were machined, compared to only 200 pieces from competitors. In the intermittent processing of 1025 steel automotive parts, CNMG432EUX-AC8035P cutting tools were used with vc=330-425 SFM, f=0.008 IPR, ap=0.040-0.125 inches, resulting in minimal damage and processing of 120 pieces. In the rough and intermittent machining of hot-rolled steel flanges, TNMG332EGU-AC8035P cutting tool is used, with vc=330 SFM, f=0.012 IPR, ap=0.060 inches, and the tool life is extended by three times. In the machining of NiCr steel gears, WNMG432EUX-AC8035P tool is used, with vc=590 SFM, f=0.006-0.016 IPR, ap=0.040 inches, and the tool life is extended by 1.7 times. In the machining of 5120 steel reverse gear, WNMG432EUX-AC8035P tool with vc=755 SFM, f=0.006-0.012 IPR, ap=0.040-0.080 inches is used, and the tool life is extended by 1.6 times. In the processing of 5140 steel flanges, WNMG433EGU-AC8035P cutting tools were used, with vc=260-655 SFM, f=0.008 IPR, ap=0.040-0.060 inches, dry cutting, and tool life extended by 1.5 times. In the machining of alloy steel shaft ends, CNMG644EMU-AC8035P cutting tool is used, with vc=460-920 SFM, f=0.020 IPR, ap=0.195 inches, dry cutting, and the tool life is extended by 1.3 times.