Sumitomo General Catalog 2025-2026

Sumi Dual Mill DMS Series

■ Ramping / Helical Milling Upper Limit

Helical Milling

Precautions for Helical Milling

Ramping

Pitch

Pitch

Pitch

Pitch

Pitch

Pitch

● Above the max. machining diameter, the center uncut portion can be removed by traverse cutting with the same cutter. ● Below the min. machining diameter, the center uncut portion cannot be removed with the same cutter.

a p

a p

a p

RMPX

RMPX

DCX

DCX

DCX

DCX

DCX

DCX

DCX

DCX

DCX

Full Diameter

Full Diameter Full Diameter

Full Diameter

Full Diameter

Full Diameter

H

DMSL

Ramping

Helical Ramping

Max. Dia. DCX (inch / mm)

Max. Ramping Angle RMPX (°)

Standard Diam- eter (Inch)

Min. Machining Dia. (Inch / mm)

Max. Machining Dia. (Inch / mm)

Max Pitch

Max Pitch

Max Pitch

0.625 0.750 1.000 1.250 1.500 2.000 2.500

0.6 1.0 0.9 0.7 0.6 0.6 0.8 1.0 1.0 1.0 1.0 0.9 0.8 0.7 0.6 0.5 0.5

1.224 1.472 1.972 2.472 2.972

0.024 0.039 0.039 0.039 0.039

0.949 1.197 1.693 2.193 2.693

0.019 0.024 0.035 0.035 0.039

0.929 1.134 1.602 2.091 2.575

0.010 0.019 0.019 0.019 0.019

Not recommended Not recommended

16 18 20 22 25 26 28 30 32 35 40 42 50 52 63 66 80

31.3 35.3 39.3 43.3 49.3 51.3 55.3 59.3 63.3 69.3 79.3 83.3

0.6 0.8 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0 1.0

24.4 28.3 32.3 36.3 42.3 44.3 48.2 52.2 56.2 62.2 72.2 76.2

0.3 0.4 0.6 0.7 0.9 0.9 0.9 1.0 1.0 1.0 1.0 1.0

23.8 27.2 30.5 34.3 39.9 41.8 45.7 49.6 53.6 59.5 69.6 73.5

0.25

0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3 0.3

Not recommended Not recommended Not recommended Not recommended Not recommended

DMSW

Ramping

Helical Ramping

Max. Dia. DCX (inch / mm)

Max. Ramping Angle RMPX (°)

Standard Diam- eter (Inch)

Min. Machining Dia. (Inch / mm)

Max. Machining Dia. (Inch / mm)

Max Pitch

Max Pitch

Max Pitch

1.500 2.000 2.500 3.000 4.000

0.8 1.4 1.2 1.2 0.8 0.5 0.8 0.8 1.4 1.4 1.2 1.2 1.2 1.2 0.8

2.972 3.972 4.972 5.972 7.972

0.063 0.079 0.079 0.079 0.079

2.346 3.343 4.343 5.339 7.339

0.031 0.079 0.079 0.079 0.079

2.252 3.185 4.118 4.976 6.976

0.020 0.039 0.039 0.039 0.039

35 40 42 50 52 63 66 80 85

69.3 79.3 83.3 99.3

1.3 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

53.5 63.4 67.4 83.3 87.3

0.5 1.0 1.0 2.0 2.0 2.0 2.0 2.0 2.0 2.0

52.0 60.2 63.9 79.1 82.8

0.5 0.5 0.5 1.0 1.0 1.0 1.0 1.0 1.0 1.0

103.3 125.3 131.3 159.3 169.3 199.3

109.3 115.3 143.2 153.2 183.2

103.6 109.4 134.0 144.0 174.0

100 125 160

Not recommended Not recommended

H156

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