Sumitomo General Catalog 2025-2026

GSX MILL Endmills (2 Flutes) GSX 20000C-1.5D Type

Recommended Cutting Conditions 1. For stable machining performance use rigid, high-precision machines and holders. 2. Use air blow when dry machining. 3. Use wet machining for stainless steel, heat-resistant alloy, and titanium alloy applications. 4. If the machine cannot achieve the recommended spindle speed, please use the maximum spindle speed available.

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DC

Side Milling

Tempered Steel, Hardened Steel NAK , HPM (35 to 45HRC)

Carbon Steel SC (150 to 250HB)

Alloy Steel SCM (25 to 35HRC)

Work Material Cutting Conditions

Steel for Structure SS

Heat-Resistant Alloy Titanium Alloy

Hardened Steel (45 to 55HRC)

Stainless Steel SUS304,SUS316

Cast Iron FC

I

Spindle Speed (min -1 ) 19,600 11,200

Feed Rate (mm/min)

Spindle Speed (min -1 ) 19,600 11,200

Feed Rate (mm/min)

Spindle Speed (min -1 ) 19,600 11,200

Feed Rate (mm/min)

Spindle Speed (min -1 ) 18,300 10,500

Feed Rate (mm/min)

Spindle Speed (min -1 ) 12,700

Feed Rate (mm/min)

Spindle Speed (min -1 )

Feed Rate (mm/min)

Spindle Speed (min -1 ) 11,000

Feed Rate (mm/min)

Spindle Speed (min -1 )

Feed Rate (mm/min)

DC (mm)

9,000 5,300 3,000 2,200 1,600 1,300 1,100

9,000 5,300 3,000 2,200 1,600 1,300 1,100

1.0 2.0 4.0 6.0 8.0

250 340 460 560 560 560 560 450 380 300

250 340 460 560 560 560 560 450 380 300

250 340 460 560 560 560 560 450 380 300

180 240 320 400 400 400 400 320 280 220

100 130 180 210 210 210 210

60 80

70 90

50 70 90

7,300 4,200 3,000 2,200 1,800 1,500 1,100

6,400 3,600 2,700 2,000 1,600 1,300 1,000

6,400 4,600 3,400 2,800 2,300 1,700 1,350 1,080

6,400 4,600 3,400 2,800 2,300 1,700 1,350 1,080

6,400 4,600 3,400 2,800 2,300 1,700 1,350 1,080

6,000 4,300 3,200 2,600 2,200 1,600 1,300 1,040

110 130 130 130 130

120 140 140 140 140

100 100 100 100

10.0 12.0 16.0 20.0 25.0

180 800 100

110 800 85

900 160 720 130

650 520

90 70

800 100

650 520

75 60

640

80

1.5DC 0.05DC

1.0DC

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Standard Depth of Cut

0.02DC

Groove Milling

Tempered Steel, Hardened Steel NAK , HPM (35 to 45HRC)

Carbon Steel SC (150 to 250HB)

Alloy Steel SCM (25 to 35HRC)

Work Material Cutting Conditions

Steel for Structure SS

Heat-Resistant Alloy Titanium Alloy

Hardened Steel (45 to 55HRC)

Stainless Steel SUS304,SUS316

Cast Iron FC

Spindle Speed (min -1 ) 19,600 11,200

Feed Rate (mm/min)

Spindle Speed (min -1 ) 19,600 11,200

Feed Rate (mm/min)

Spindle Speed (min -1 ) 19,600 11,200

Feed Rate (mm/min)

Spindle Speed (min -1 ) 18,300 10,500

Feed Rate (mm/min)

Spindle Speed (min -1 ) 12,700

Feed Rate (mm/min)

Spindle Speed (min -1 )

Feed Rate (mm/min)

Spindle Speed (min -1 ) 11,000

Feed Rate (mm/min)

Spindle Speed (min -1 )

Feed Rate (mm/min)

DC (mm)

9,000 5,300 3,000 2,200 1,600 1,300 1,100

4,500 2,650 1,500 1,100

1.0 2.0 4.0 6.0 8.0

200 270 370 450 450 450 450 360 300 240

250 340 460 560 560 560 560 450 380 304

250 340 460 560 560 560 560 450 380 304

180 240 320 400 400 400 400 320 280 224

100 130 180 210 210 210 210

60 80

50 65 80

20 25 35 40

7,300 4,200 3,000 2,200 1,800 1,500 1,100

6,400 3,600 2,700 2,000 1,600 1,300 1,000

6,400 4,600 3,400 2,800 2,300 1,700 1,350 1,080

6,400 4,600 3,400 2,800 2,300 1,700 1,350 1,080

6,400 4,600 3,400 2,800 2,300 1,700 1,350 1,080

6,000 4,300 3,200 2,600 2,200 1,600 1,300 1,040

110 130 130 130 130

100

100 800 40 100 650 40 100 500 40 80 400 35

10.0 12.0 16.0 20.0 25.0

180 800 100

900 160 720 128

650 520

90 72

800 640

70 56

320 256

30 24

Standard Depth of Cut

0.2DC

0.5DC

0.2DC

0.05DC

0.2DC

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