Kyocera TNMG160408L-ST CA115P TML00250 Tri Ins

Product Overview

The Kyocera TNMG160408L-ST CA115P TML00250 is a premium triangle insert engineered for Ext. Turning, Facing, Shoulder Cutting. Manufactured in Japan to ISO 1832 standards, this insert combines a fine-grained carbide substrate with an advanced PVD TiAlN multilayer coating to deliver exceptional wear resistance, thermal stability, and chip control. The Left-Hand Standard (L-ST) - Standard chipbreaker for left-hand toolholders ensures reliable chip breaking and superior surface finish across a wide range of cutting parameters. This left-hand variant is designed for use in left-hand toolholders, cutting on the left side of the workpiece. Whether you are performing general external turning, face machining, or shoulder cutting on alloy steel, this insert provides consistent dimensional accuracy and extended tool life that reduces cost per component.

ISO Designation Breakdown

The ISO designation TNMG160408L-ST is decoded as follows:

• T: Insert Shape: Triangle (60°)
• N: Clearance Angle: 0° (Neutral)
• M: Tolerance Class: M (±0.05mm thickness, ±0.08mm inscribed circle)
• G: Hole/Chipbreaker: Cylindrical hole with countersink and chipbreaker groove
• 16: Inscribed Circle (IC) = 16.0 mm
• 04: Insert Thickness (S) = 4.76 mm (3/16")
• 08: Nose Radius (R) = 0.8 mm
• L-ST: Chipbreaker / Precision Class = Left-Hand Standard (L-ST) - Standard chipbreaker for left-hand toolholders

Engineering Dimensions & Geometry

Precise dimensional data for tool selection, holder compatibility, and CAM programming:

Grade Details - Key Grade Characteristics

The CA115P grade is a PVD-coated carbide optimized for steel and stainless steel machining:

• Substrate: Fine-grained WC-Co carbide with high cobalt content for toughness and wear resistance
• Coating: Advanced PVD TiAlN multilayer coating (gold-bronze appearance) for high-temperature stability
• Hardness: HRA 92.5 ± 0.5, providing excellent crater and flank wear resistance
• Color Code: Bronze/Gold - easily identifiable in tool cribs and CNC setups
• ISO Application Range: P15-P30, M15-M25 - optimized for steel and stainless steel machining
• Cutting Speed Capability: 150-350 m/min (depending on workpiece material and operation)
• Chip Control: Excellent chip breaking across medium to high feed rates (0.1-0.5 mm/rev)
• Edge Preparation: Precision-honed T-land edge for reduced burr formation and extended edge life

Grade Comparison Matrix

Compare CA115P with related Kyocera grades to select the optimal insert for your application:

Chipbreaker Profile

The TNMG160408L-ST features the Left-Hand Standard (L-ST) - Standard chipbreaker for left-hand toolholders. This geometry is specifically designed for Left-hand standard machining. The optimized rake angle and groove depth promote smooth chip curling and controlled chip breakage, preventing bird-nesting and protecting both the workpiece surface and the machine tool. The precision-ground edge preparation minimizes burr formation and ensures a clean entry into the cut, making it ideal for CNC automated production where unattended operation is required.

Recommended Applications & Workpiece Materials

The CA115P grade with TNMG160408L-ST geometry is recommended for the following materials:

• Carbon Steel (C45, C60): Excellent surface finish at medium speeds; ideal for shaft and pin turning
• Alloy Steel (4140, 4340): Balanced wear resistance and toughness for automotive components
• Stainless Steel (304, 316): Reduced built-up edge thanks to PVD coating; superior chip evacuation
• Tool Steel (H13, D2): Pre-hardened material machining with consistent tool life
• Cast Iron (GG25, GGG40): Good performance in continuous and lightly interrupted cuts

Application Map by Operation

Performance rating by machining operation (★★★★★ = optimal):

Recommended Cutting Conditions

Starting parameters for stable machining. Adjust based on machine rigidity, coolant, and part geometry:

Operating Guidelines

Follow these best practices to maximize insert life and part quality:

• Run-in Procedure: Reduce cutting speed by 20% for the first 5 minutes to stabilize the cutting edge and coating
• Coolant Recommendation: Use water-soluble coolant at 6-8% concentration for steel; synthetic coolant for stainless steel to prevent built-up edge
• Tool Overhang: Minimize tool overhang to 1.5x tool diameter to reduce vibration and improve surface finish
• Insert Positioning: Ensure insert sits flush in pocket; torque clamp screw to 3.5-4.5 Nm (refer to holder specification)
• Chip Management: Verify chipbreaker orientation matches rotation direction; chips should curl and break into C- or 6-shape
• Edge Inspection: Check for flank wear (VB < 0.3 mm) and crater wear (KT < 0.2 mm); replace insert when limits reached
• Speed Adjustment: If vibration or chatter occurs, reduce speed by 10% and increase feed by 5% to maintain chip thickness
• Storage: Store inserts in original packaging away from moisture and direct sunlight; avoid contact between cutting edges

Toolholder Compatibility

Compatible Kyocera and standard ISO toolholders for this insert:

• External Turning: TTJNR / TTJNL 2020K16 (for TNMG 16-size, 93° tool approach)
• Face Turning: STFCR / STFCL 2020K16 (for 16-size, 75° lead angle)
• Shoulder Cutting: STGCR / STGCL 2020K16 (for 16-size, 90° approach)
• Internal Boring: S16Q-STFCR11 (screw-clamp, minimum bore Ø22 mm)
• General Purpose: PTJNR / PTJNL 2020K16 (for triangular inserts, 0° clearance)

Packaging & Ordering Information

Packaging details, pricing, and ordering terms:

• Packaging Type: Individual plastic insert pocket with desiccant; 10 inserts per sealed blister pack
• Label Information: Each pack includes Kyocera hologram, batch number, ISO designation, and grade color code
• Minimum Order Quantity: 10 inserts (1 pack); bulk pricing available for quantities of 50, 100, and 500+
• Unit Price: $6.1 per insert (10-pack pricing); contact sales for OEM and distributor volume discounts
• Stock Availability: Standard items typically ship within 24-48 hours; non-stock items have 2-4 week lead time
• Return Policy: Unused inserts in original packaging may be returned within 30 days; custom orders are non-returnable
• Warranty: Full manufacturer warranty against material and coating defects; technical support available via chat and email

Catalog Meta Data

Technical catalog and compliance information: