SUMITOMO EGU chip breaker selection and troubleshooting

Anti collapse blade and tool life

Positive EGU adopts a double front corner shape, balancing sharpness and blade strength. In the light intermittent cutting of 4135 chromium molybdenum steel outer circle, the impact frequency of EGU reached 9200 times, while that of competitor B was 5700 times and competitor C was 6200 times, with a lifespan increase of about 1.6 times. From the perspective of failure mode, both competitors B and C have experienced blade breakage, while EGU only shows normal wear. This indicates that the blade structure of EGU can effectively disperse impact stress and suppress micro blade expansion under light intermittent working conditions.

In the external contour modeling of 4130 automotive drive components, EGU is matched with AC8025P material, with a cutting speed of 720 SFM, a feed rate of 0.0079 IPR, a cutting depth of 0.0197 inches, and wet cutting. Compared with conventional products, EGU significantly improves chip winding problems and enhances processing efficiency. In the internal hole profiling of 4130 precision mechanical components, EGU is matched with AC6040M material, with a cutting speed of 425 SFM, a feed rate of 0.0079 IPR, a cutting depth of 0.0197 inches, and wet cutting. EGU suppresses the increase in cutting edge temperature, reduces wear and damage, while competitor A exhibits significant crescent wear.

Recommended cutting parameters and material matching

Positive EGU can be paired with various materials, including carbon steel, alloy steel, stainless steel, cast iron, and heat-resistant alloys. The recommended parameters are as follows:

Low carbon steel and structural steel: AC8015P, AC8025P, AC8035P, cutting speed 525-1375 SFM, feed rate 0.0047-0.0118 IPR, cutting depth 0.0197-0.0984 inches.

Carbon steel, alloy steel (1045, 4135, etc.): AC8015P, AC8025P, AC8035P, cutting speed 460-1246 SFM, feed 0.0039-0.0118 IPR, cutting depth 0.0157-0.0984 inches.

Austenitic stainless steel: AC6020M, AC6030M, AC6040M, cutting speed 295-690 SFM, feed rate 0.0039-0.0118 IPR, cutting depth 0.0157-0.0984 inches.

Gray cast iron: AC4010K, cutting speed 650-2300 SFM, feed rate 0.0039-0.015 IPR, cutting depth 0.020-0.240 inches.

Ductile iron: AC4015K, cutting speed 525-1300 SFM, feed rate 0.0039-0.020 IPR, cutting depth 0.020-0.240 inches.

Heat resistant alloys (nickel based, iron-based, cobalt based): AC5015S, cutting speed of 90-300 SFM, feed rate of 0.0031-0.0098 IPR, cutting depth of 0.0157-0.0787 inches.

In grooving and profiling, the feed range of EGU typically covers 0.002-0.012 IPR, and the cutting depth covers 0.015-0.120 inches. For small part lathes and Swiss lathes, EGU's low resistance characteristics can reduce bending and vibration of slender parts, making it a universal choice among regular angle blades.

Practical case: From automotive parts to bearing parts

4130 car drive component outer circle imitation: using DCMT32.51EGU-AC8025P, vc=720 SFM, f=. 0079 IPR, ap=. 0197 inches, wet cut. EGU has improved chip winding, increased processing efficiency, and surface quality compared to conventional products.

4130 Precision Mechanical Component Inner Hole Imitation: Using TPMT221EGU-AC6040M, vc=425 SFM, f=. 0079 IPR, ap=. 0197 inches, wet cut. EGU suppresses the increase in cutting edge temperature, reduces wear and damage, while competitor A exhibits significant crescent wear.

4130 Automotive Parts Internal Conical Hole Boring: Use CPMT322EGU-AC8025P, vc=660 SFM, f=. 0079 IPR, ap=. 0787 inches, wet cut. EGU has good chip control at a cutting depth of 2.0mm, while competitors experience chatter under the same conditions and are not suitable. EGU has shorter chips and more stable chip discharge when cutting at a depth of 1.0mm.

5015 fastener inner hole boring: using CCMT32.52EGU-AC8025P, vc=625 SFM, f=. 0098 IPR, ap=. 0394 inches, wet cut. The strong cutting edge design of EGU enables the tool life to reach 1.5 times that of competitor B.

52100 Bearing Component Inner Hole Boring: Use DCMT32.53EGU-AC8025P, vc=720 SFM, f=. 0059 –. 0138 IPR, ap=. 0315 –. 1496 inches, wet cut. The strong cutting edge design of EGU has increased the tool life to 1.3 times that of competitor C, and the machining quantity has increased from about 280 pieces to 400 pieces.

These cases demonstrate that EGU can balance chip control, anti vibration, and tool life in precision machining of industries such as automobiles, bearings, and fasteners. It is particularly suitable for inner hole profiling, outer circle profiling, and inner cone hole boring.

Available models and materials

Positive EGU offers a variety of blade shapes and specifications, including CCMT, CPMT, DCMT, SCMT, TPMT, VBMT, VCMT, and more. Common models include CCMT21.51EGU、CCMT21.52EGU、CCMT32.51EGU、CCMT32.52EGU、CCMT432EGU、DCMT21.51EGU、DCMT21.52EGU、DCMT32.50.5EGU、DCMT32.51EGU、DCMT32.52EGU、DCMT32.53EGU、SCMT32.51EGU、SCMT32.52EGU、SCMT432EGU、TPMT221EGU、TPMT222EGU、TPMT331EGU、TPMT332EGU、VBMT221EGU、VBMT222EGU、VBMT331EGU、VBMT332EGU、VCMT331EGU、VCMT332EGU  Wait. The material covers AC8015P, AC8025P, AC8035P, AC6040M, AC5015S, AC4010K, AC4015K, etc., and can be selected according to the workpiece material.