DoForce-Tri

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Highly productive and cost-effective shoulder milling cutter

Economical shoulder mill with an innovative 6-edged geometry for maximum performance in various applications

Applications & Features

Applications

Shoulder millingShoulder milling RSlottingSlotting RSide milling

Features

1. Innovative insert design for improved productivity

Inserts are available in 2 sizes for maximum density and cutting depths over conventional double-sided 6-edged inserts.

2. High machining flexibility

The cutting edge is configured with a large curve with an optimal inclination.

Inserts & Grades

Inserts

TN*U

  • Maximum depth of cut
    – TN*U07: 6.5 mm
    – TN*U12: 11 mm
Main Grades

AH3135

P30 – P40 / M30 – M40

  • High fracture resistance
  • Suitable for machining steel and stainless steel under general cutting conditions

AH120

P15 – P25 / M15 – M25 / K15 – K30 / S10 – S25

  • Good balance between wear and fracture resistance
  • Suitable for machining steel, stainless steel, and cast iron under general cutting conditions

AH3225

  • Good balance between wear and fracture resistance
  • Suitable for steel and stainless steel

Cutter bodies

Shank Type

EPTN07/12 (ø18 – ø40 mm)

Cylindrical type holder for shoulder milling

Bore Type

TPTN12 (ø50 – ø160mm)

Bore type for shoulder milling

Practical examples

Example #1

Automotive Industry

Part: Crankshaft
Material: S55C / C55
Cutter: TPTN12M160B40.0R10N (ø160, z = 10)
Insert: TNMU120708PER-MJ
Grade: AH3135
Cutting conditions: Vc = 135 (m/min)
fz = 0.157 (mm/t)
Vf = 420 (mm/min)
ap = 3 (mm)
ae = 125 (mm)
Application: Shoulder milling
Coolant: Air blow
Machine: Horizontal boring M/C, BT50
Example #2

General Engineering

Part: Machine part
Material: SUS304 / X5CrNi18-9
Cutter: EPTN07M025C25.0R04 (ø25, z = 4)
Insert: TNMU070308PER-MJ
Grade: AH3135
Cutting conditions: Vc = 196 m/min
fz = 0.13 mm/t
Vf = 1298 mm/min
ap = 2 mm
ae = 25 mm
Application: Grooving
Coolant: Air
Machine: Horizontal M/C, BT40
Example #3

Automotive Industry

Part: Bearing housing
Material: FC250 / GG25 / 250
Cutter: EPTN07M032C32.0R05 (ø32, z = 5)
Insert: TNMU070308PER-MJ
Grade: AH3135
Cutting conditions: Vc = 320 m/min
fz = 0.06 mm/t
Vf = 960 mm/min
ap = 2 mm
ae = 24 mm
Application: Grooving
Coolant: Air
Machine: Horizontal M/C, BT40

Standard cutting conditions

Size 07 inserts
ISO Workpiece material Hardness Priority Grade Cutting speed
Vc (m/min)		 Feed per tooth
fz (mm/t)
Carbon steel
SS400, S15C, etc.
E275A, C15E4, etc.		 – 200 HB First choice AH3225 100 – 250 0.07 – 0.2
– 200 HB For fracture resistance AH3135 100 – 250 0.07 – 0.2
High Carbon steel, Alloy steel
S45C, SCM440, etc.
C45, 42CrMo4, etc.		 – 300 HB First choice AH3225 100 – 230 0.07 – 0.15
– 300 HB For fracture resistance AH3135 100 – 230 0.07 – 0.15
Prehardened steel
NAK80, PX5, etc.		 30 – 40 HRC First choice AH3225 100 – 180 0.07 – 0.15
30 – 40 HRC For fracture resistance AH3135 100 – 180 0.07 – 0.15
Stainless steel
SUS304, etc.
X5CrNi18-9, etc.		 – First choice AH3135 90 – 200 0.07 – 0.15
– For wear resistance AH3225 90 – 200 0.07 – 0.15
Grey cast iron
FC250, etc.
GG25, etc., 250, etc.		 150 – 250 HB First choice AH120 140 – 250 0.07 – 0.2
150 – 250 HB For fracture resistance AH3225 140 – 250 0.07 – 0.2
Ductile cast iron
FCD450, etc.
GGG45, etc., 450-10S, etc.		 150 – 250 HB First choice AH120 110 – 200 0.07 – 0.15
150 – 250 HB For fracture resistance AH3225 110 – 200 0.07 – 0.15
Titanium alloys
Ti-6Al-4V, etc.		 – First choice AH3135 20 – 60 0.07 – 0.15
Heat-resistant alloys
Inconel 718, etc.		 – First choice AH120 20 – 40 0.07 – 0.1
Size 12 inserts
ISO Workpiece material Hardness Priority Grade Chipbreaker Cutting speed
Vc (m/min)		 Feed per tooth
fz (mm/t)
Carbon steel
SS400, S15C, etc.
E275A, C15E4, etc.		 – 200 HB First choice AH3225 MJ 100 – 250 0.08 – 0.3
– 200 HB For fracture resistance AH3135 MJ 100 – 250 0.08 – 0.3
– 200 HB For wear resistance T3225 MJ 100 – 300 0.08 – 0.3
– 200 HB Low cutting force AH3225 NMJ 100 – 250 0.08 – 0.14
High Carbon steel, Alloy steel
S45C, SCM440, etc.
C45, 42CrMo4, etc.		 – 300 HB First choice AH3225 MJ 100 – 230 0.08 – 0.3
– 300 HB For fracture resistance AH3135 MJ 100 – 230 0.08 – 0.3
– 300 HB For wear resistance T3225 MJ 100 – 280 0.08 – 0.3
– 300 HB Low cutting force AH3225 NMJ 100 – 230 0.08 – 0.14
Prehardened steel
NAK80, PX5, etc.		 30 – 40 HRC First choice AH3225 MJ 100 – 180 0.08 – 0.25
30 – 40 HRC For fracture resistance AH3135 MJ 100 – 180 0.08 – 0.25
30 – 40 HRC For wear resistance T3225 MJ 100 – 200 0.08 – 0.25
30 – 40 HRC Low cutting force AH3225 NMJ 100 – 180 0.08 – 0.14
Stainless steel
SUS304, etc.
X5CrNi18-9, etc.		 – First choice AH3135 MJ 90 – 200 0.08 – 0.25
– For wear resistance T3225 MJ 90 – 250 0.08 – 0.25
– Low cutting force AH3135 NMJ 90 – 200 0.08 – 0.14
Grey cast iron
FC250, etc.
GG25, etc., 250, etc.		 150 – 250 HB First choice AH120 MJ 140 – 250 0.08 – 0.3
150 – 250 HB For fracture resistance AH3225 MJ 140 – 250 0.08 – 0.3
150 – 250 HB For wear resistance T1215 MJ 140 – 300 0.08 – 0.3
150 – 250 HB Low cutting force AH120 NMJ 140 – 250 0.08 – 0.14
Ductile cast iron
FCD450, etc.
GGG45, etc., 450-10S, etc.		 150 – 250 HB First choice AH120 MJ 110 – 200 0.08 – 0.25
150 – 250 HB For fracture resistance AH3225 MJ 110 – 200 0.08 – 0.25
150 – 250 HB For wear resistance T1215 MJ 110 – 250 0.08 – 0.25
150 – 250 HB Low cutting force AH120 NMJ 110 – 200 0.08 – 0.14
Titanium alloys
Ti-6Al-4V, etc.		 – First choice AH3135 MJ 20 – 60 0.08 – 0.2
– Low cutting force AH3135 NMJ 20 – 60 0.08 – 0.14
Heat-resistant alloys
Inconel 718, etc.		 – First choice AH120 MJ 20 – 40 0.07 – 0.18
– Low cutting force AH120 NMJ 20 – 40 0.07 – 0.14

Note: For NMJ chipbreaker, use a feed rate that satisfi es the following theoretical chip thickness:

Designation Chip thickness (mm)
TNMU120708PER-NMJ < 0.2

For more information about this product, visit our online e-catalog or download the product report:

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