The MITSUBISHI CCMT09T304 US735 is an original Japanese coated cemented carbide positive rake turning insert, belonging to Mitsubishi’s US series dedicated grade for stainless steel and heat-resistant superalloy machining. This 80° rhombus (C-type) single-sided insert features standard MCS general-purpose chipbreaker geometry, 0.4mm nose radius, 7° positive back relief angle, and multi-layer high-temperature resistant CVD coating US735. It delivers excellent anti-work-hardening, anti-adhesion and thermal wear resistance during medium & low-speed stable turning, suitable for external turning, internal boring and finish semi-finishing on 304/316 stainless steel, nickel-based superalloy and titanium alloy. It perfectly matches SCLCR/SCLCN series C-type lathe tool holders for CNC lathe mass precision production.

• Brand: MITSUBISHI MATERIALS (Japan top cutting tool carbide manufacturer)
• Full ISO Model Code: CCMT09T304 US735
• ANSI Equivalent Model: CCMT32.51 US735
• Insert Shape: 80° Rhombus C-type, single-sided 2 usable cutting edges
• Inscribed Circle IC: 9.525 mm (3/8")
• Insert Thickness S: 3.97 mm (T3 specification)
• Corner Radius RE: 0.4 mm
• Back Relief Angle AN: 7° Positive rake
• Chipbreaker Type: MCS standard universal chip control groove
• Coating Grade: US735 exclusive CVD multi-layer composite coating (golden surface finish)
• Substrate Grade: Tough hard alloy substrate for interrupted & unstable cutting
• Core Application Target: Stainless steel, nickel-based superalloy, titanium alloy
• Compatible Tool Holder: SCLCR, SCLCN external turning & boring tool holders
• Standard Packing Quantity: 10 pieces per original yellow Mitsubishi plastic compartment box
• Origin: Made in Japan

• Austenitic stainless steel: SUS304, SUS316, duplex stainless steel
• Heat-resistant superalloy: Inconel, Hastelloy nickel-based alloy
• Titanium alloy, high-strength alloy steel
• Mild carbon steel, gray cast iron (secondary universal processing)

• External diameter semi-finish & finish turning of stainless steel auto fittings, hydraulic pipe joints
• Small precision internal hole boring on medical stainless steel components
• Nickel alloy & titanium alloy aviation miniature part stable low-speed turning
• Mold auxiliary stainless steel insert, fixture batch CNC lathe production
• Unstable clamping interrupted cutting scenarios with strict anti-chipping requirements
• Mass production demanding long tool life and consistent surface finish on sticky hard-to-cut materials

• Exclusive US735 CVD multi-layer coating: Optimized for stainless steel & superalloy, effectively suppress built-up edge and workpiece work-hardening, reduce tool wear rate significantly compared with general PVD coated inserts
• 7° positive rake angle design: Low cutting resistance, lower spindle load and cutting chatter, greatly improves surface roughness of sticky stainless steel parts
• MCS balanced chipbreaker geometry: Curled short chips avoid chip winding around workpiece or tool holder, stable chip evacuation for both external turning and internal boring
• Tough shock-resistant carbide substrate: Excellent edge toughness to resist chipping during interrupted unstable cutting, extends service life in discontinuous machining
• Single-sided 2-edge structure: Cost-effective compared to double-sided inserts, easy to replace after edge wear for small batch flexible production
• Standard universal 09 size dimension: Fully interchangeable with global standard SCLCR09 tool holders, convenient global spare part stocking for foreign trade customers