Cutter insert RPHT

Product features and specifications

Basic specifications and features of the product

CVD coated grade MC7020 for stainless steel milling

In addition to excellent wear resistance, it suppresses thermal cracks and chipping that tend to occur when machining stainless steel, achieving stable machining over the long term.

• Improved abrasion resistance
  The fine-grained highly wear_- resistant Al₂ O layer and the fine fibrous TiCN layer provide excellent wear resistance in high-speed stainless steel milling.
• Improved wear resistance
  Sudden chipping of the cutting edge is suppressed by adopting a special cemented carbide base material with excellent toughness and thermal crack resistance.
• Suppression of abnormal damage
  Extremely smooth surface "All Black Super Even Coat" suppresses abnormal damage such as welding chipping.

MC7020 coating structure

Al-Ti-Cr-N Multilayer Coating MP71/MP91 Series Tough-Sigma Technology

TOUGH is achieved through the fusion (Σ) of each excellent coating and technology.

Base layer High Al- (Al, Ti) N/Al content is increased to improve film hardness and stabilize the high-hardness phase, improving wear resistance, crack resistance, and adhesion resistance during cutting. did.

Optimal coating for each work material

The laminated structure prevents crack progress and improves wear resistance.

Performance/test information

Cutting performance

Comparison of wear resistance of stainless steel SUS420J1

Achieved a life extension of 40% or more compared to conventional products.

"Cutting Conditions"
Work material: SUS420J1
Cutter diameter: DCX=⌀50
Insert: RPHT1040M0E4-R
Material Type: MC7020
Cutting speed: vc=350m/min
feed rate: fz=0.35mm/t.
Depth of cut: ap=2.5mm
Cut width: ae = 25 mm
Machining form: Dry cutting, single blade cutting

Taken at 8.4 m cutting length

ARP5 (VB=0.141)

Conventional product (VB=0.172)

Comparison of precipitation hardening stainless steel SUS630 chipping resistance

Achieves stable machining compared to conventional products.

Taken at 0.4 m cutting length

ARP5/VB=0.140 Micro chipping

Conventional product A/VB=0.358 Large chipping

Conventional product B/VB=0.172 Chipping

"Cutting Conditions"
Work material: SUS630
Cutter diameter: DCX=⌀50
Insert: RPHT1040M0E4-L
Material Type: MP7130
Cutting speed: vc=350m/min
feed rate: fz=0.25mm/t.
Depth of cut: ap=2.5mm
Cut width: ae=14mm
Machining form: Dry cutting, single blade cutting

Stainless steel SUS304 Wear resistance comparison

Achieved 30% longer life compared to conventional products.

"Cutting Conditions"
Work Material: SUS304
Cutter diameter: DCX=⌀50
Insert: RPHT1040M04E4-L
Material Type: MP7130
Cutting speed: vc = 220 m/min
feed rate: fz=0.35mm/t.
Depth of cut: ap=2.5mm
Cut width: ae = 25 mm
Machining form: Dry cutting, single blade cutting

Taken at 0.8 m cutting length

ARP5 (VB=0.112)

Conventional product A (VB=1.608)

Conventional product B (VB=0.171)

Titanium alloy Ti-6Al-4V wear resistance comparison

Achieved a life extension of 25% or more compared to conventional products.

"Cutting Conditions"
Work material: Ti-6Al-4 V
Cutter diameter: DCX=⌀50
Insert: RPHT1040M04E4-L
Material Type: MP9130
Cutting speed: vc=60m/min
feed rate: fz=0.1mm/t.
Depth of cut: ap=2.5mm
Cut width: ae = 20 mm
Machining form: Wet cutting (low pressure), single edge cutting

Taken at 2.0 m cutting length

ARP5 (VB=0.110)

Conventional product (VB=0.231)

Drawing

Usage method and usage examples

Usage examples

Even if the products are used under the recommended conditions, obtained performance may differ depending on usage by customers.

Recommended cutting conditions

Recommended cutting condition table

Dry cutting conditions

Wet cutting conditions

Correction value F for feed amount per tooth due to variation in axial depth of cut ap

* If the recommended axial depth of cut is exceeded, the durability of the tool body may be reduced.

Precautions for cutting conditions

• These cutting conditions are a guideline for preventing chatter vibration in situations where machine rigidity and workpiece rigidity are high.
  If chattering or insert chipping occurs during machining, adjust accordingly.
  If the overhang is large or if pocketing is to be performed, lower the conditions.
• The set value for the feed per tooth is the value when the axial depth of cut is ap=2.5 mm for ARP5 and ap=3 mm for ARP6.
  Please multiply by the correction value F in the separate table according to the fluctuation of ap.
  Example Recommended feed per tooth for ARP5, SUS304, MP7130, ap=1: 0.2 mm/t. × 1.5 (correction value F) =0.3 mm/t.
• For grooving, use feed at about 70% of the recommended rate, and for ramping, drilling, and plunging at about 50%.
• Internal coolant is recommended for cutting titanium alloys and heat-resistant alloys.
  It is even more effective if you use the separately sold coolant nozzle.

Applicable work material

Selection support information

Chip breaker system

Chipbreaker system that can handle various cutting conditions.

Cautions/prohibitions

Note 1) When drilling, continuous long chips may fly out, so please be careful about safety.
Note 2) When drilling helical holes, be careful not to exceed the maximum APMX for the depth of cut per lap.
Note 3) Use the following formula to calculate the tool center locus ⌀dc when drilling a helical hole. (Tool center locus ⌀dc = desired hole diameter ⌀DH - tool diameter ⌀DCX)
Note 4) In order to prevent troubles caused by chip biting, be sure to remove chips with an air blow, etc., especially during grooving, ramping, helical, and drilling.
Note 5) Small diameter cutters with a large number of teeth produce small chips. Please pay attention to the depth of cut and feed rate, as chip clogging may occur.
Note 6) When machining with a large diameter cutter with a large ae, the chips become long and may cause chip clogging. Please adjust the depth of cut ap and feed before use.