SUMITOMO ELECTRIC AC4000K series (AC4010K/AC4015K/AC4125K) cast iron turning

SUMITOMO ELECTRIC AC4000K series (AC4010K/AC4015K/AC4125K) cast iron turning

Three brand positioning and core technologies

The entire series adopts ABS TECH CVD coating technology: C-rich ultrafine TiCN layer+orientation controlled Al ₂ O Ⅲ alumina layer+high adhesion technology+special surface stress treatment; Smooth edge processing Rz optimized from 0.15 μ m to 0.07 μ m, resistant to coating peeling; The compressive stress of the coating is doubled compared to traditional products, and the anti chipping performance is doubled.

Brand, appearance, color, core positioning, applicable working conditions

AC4010K gold gray cast iron high-speed processing is preferred for continuous to light intermittent, pursuing ultra-high linear speed; Grey cast iron can reach up to 2300 SFM; The best wear resistance, strong resistance to crescent wear and tear

AC4015K gold ductile iron universal main grade continuous, ordinary intermittent processing gray/ductile iron; Balancing wear resistance and toughness, balancing gray iron and high-strength ductile iron

AC4125K gold (easily recognizable worn tool tip) heavy intermittent cast iron processing new grade heavy impact, unstable cutting, rough machining of differential housing, carrier with casting holes and notches; The highest toughness and prominent anti collapse blade

Technical differences: AC4125K optimizes residual stress and grain control, and the wear resistance of the rear cutting surface is 1.5 times that of traditional K20 material, doubling the resistance to chipping and specifically solving intermittent impact chipping of cast iron.

Chip breaking groove system (specifically for cast iron)

Applicable scenarios for slot positioning

EGZ (First Recommended Universal Slot) has the strongest universality and high cutting edge strength for most cast iron turning processes, including precision, semi precision, and ordinary intermittent cutting. The first recommended slot type for the sample is EGZ

EGU low resistance slot shaped slender and poorly rigid workpiece reduces cutting resistance and vibration

ENZ universal precision machining groove is sharp while considering the strength of the cutting edge, and the precision machining working conditions

EME rough machining with high feed slot and large feed rough lathe, balancing sharpness and blade strength

Non chip groove (MA type, such as CNMA) with ultimate cutting edge strength, deep cutting, and harsh heavy intermittent machining

Chip selection logic: low workpiece rigidity prioritizes EGU; Normal working condition EGZ; Rough machining with large feed EME; Select slotless MA blades directly for heavy impact.

Recommended cutting parameters (Imperial SFM/IPR/inch)

Workpiece material working condition grade ap (in) f (IPR) Vc (SFM)

Grey cast iron FC250 continuous to general intermittent AC4010K 0.020-0.236 0.004-0.016 655-2300

Gray cast iron FC250 with mild intermittent AC4015K 0.020-0.236 0.004-0.020 590-1475

Grey cast iron FC250 heavy intermittent AC4125K 0.020-0.236 0.004-0.024 490-985

Ductile iron 60-40-18 continuous AC4010K 0.020-0.236 0.004-0.016 590-1475

Ductile iron 60-40-18 general mild intermittent AC4015K 0.020-0.236 0.004-0.020 525-1310

Ductile iron 60-40-18 weight intermittent AC4125K 0.020-0.236 0.004-0.024 395-820

High strength ductile iron 100-70-03 continuous AC4010K 0.020-0.236 0.004-0.016 525-1310

High strength ductile iron 100-70-03, general - mild intermittent AC4015K 0.020-0.236 0.004-0.020 460-1150

High strength ductile iron 100-70-03, intermittent AC4125K, 0.020-0.236, 0.004-0.024, 260-720

Processing methods: both dry and wet are supported; Priority dry cutting of high-speed gray cast iron; Wet cooling is recommended for ductile iron.

Performance test results

AC4010K continuous gray cast iron FC250:1969SFM high-speed dry cutting; After the same cutting time, the wear of the cutting surface is much smaller than that of the competitor K10 and the traditional K10, and it has excellent resistance to crescent wear.

Intermittent testing of gray cast iron: AC4010K and AC4015K blades have only minor breakage; Competitor B has a front blade fracture.

Continuous processing of ductile iron (100-70-03): AC4015K exhibits the best wear performance, surpassing its competitor K15.

Intermittent impact of ductile iron: The cutting time before the edge collapse of AC4010K/AC4015K is significantly longer than that of traditional K15 and competitor D.

AC4125K high-strength ductile iron with intermittent weight: The processing time for blade breakage is significantly longer than that of traditional K20 and competitor A, and the advantage is obvious under heavy impact.

Actual Processing Application Cases

Typical parts: brake disc, ring gear, differential housing, wheel hub, flywheel, pulley, gearbox body, gray iron/ductile iron/high-strength ductile iron parts.

Brake discs (with oxide skin) AC4010K+EGZ: 70 pieces/blade tip, compared to only 50 pieces for competitor A, with a lifespan increase of 1.4 times.

Ball iron gear ring outer circle AC4010K+EME: Compared to competitor C, it has an increased lifespan.

The weight of the differential case is intermittent AC4015K+EGZ: 60 pieces/blade tip, while the competitor D only has 45 pieces.

80-55-06 gearbox end face AC4015K+EME rough car: 12 pieces, competitor E only has 10 pieces.

The weight of the AC4125K differential case is intermittent: 17 pieces, while the competitor G only has 11 pieces; Partial working conditions have reached twice the tool life of competitors.

Rough machining of ductile iron wheel hub and load pulley: AC4125K has significantly better resistance to chipping blades than its competitors in conditions such as notches, sand holes, and casting defects.

Blade Product Specification List

It includes two categories: negative front angle blades and positive front angle blades:

Negative front angle (mainstream, most commonly used for cast iron cars)

80 ° diamond shaped CNMG/CNMA; 55 ° diamond shaped DNMG/DNMA; Square SNMG/SNMA

Triangle TNMG/TNMA; 35 ° diamond shaped VNMG/VNMA; Trigon WNMG / WNMA

Slot type coverage: EGU, ENZ, EGZ, EME; MA model without chip breaker.

Positive Insert 

80 ° diamond shaped CCMT/CCMA; 55 ° diamond shaped DCMT/DCMA; Triangular TCMT, TPMT; 35 ° diamond shaped VBMA; Circular RCMX, etc

Slot types: EGU, ESU, ELUW, EMU; MA has no chip breaking groove.

Tag description: US spot inventory; Global warehouse transfer; Covering various specifications of inscribed circles and blade tip radii.