Mitsubishi TPGX160304 HTI10 Uncoated Carbide Turning Inserts (Imperial: TPGX321)
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Mitsubishi TPGX160304 HTI10 Uncoated Carbide Turning Insert (ANSI: TPGX321)
1. Product Overview
Which positive triangular turning insert provides ultra-sharp cutting edges, mirror-like surface finishes, and excellent chip flow when machining aluminum and non-ferrous alloys on CNC lathes?
The Mitsubishi TPGX160304 HTI10 (Imperial ANSI designation: TPGX 321 HTI10) is a high-precision, positive 60° triangular turning insert engineered for profiling, facing, and fine-finishing operations. Manufactured in accordance with ISO 1832 and ANSI B212.4 standards, this insert features an 11° relief angle and an uncoated sharp cutting edge designed to prevent built-up edge (BUE) in gummy non-ferrous metals.
The proprietary HTI10 grade is Mitsubishi's benchmark uncoated carbide grade combining high hardness with exceptional transverse rupture strength. Its polished rake face and razor-sharp cutting edge minimize cutting resistance, delivering superior surface roughness (Ra < 0.4 μm) when turning aluminum, copper, brass, plastics, and gray cast irons.
2. Key Features
- HTI10 Uncoated Micro-Grain Carbide: Highly wear-resistant uncoated grade designed specifically to prevent built-up edge (BUE) and adhesion when machining aluminum and non-ferrous metals.
- Positive 60° Triangular Geometry (11° Relief): Provides low cutting forces and excellent clearance for internal boring and external contour turning.
- Razor-Sharp Ground Cutting Edges: Mirror-polished rake and flank surfaces ensure clean shearing action and exceptional workpiece surface finishes.
- Precision Dimensional Tolerances: Manufactured to strict ISO G-tolerance standards for high clamping repeatability and indexability.
- Universal Toolholder Compatibility: Standardized size fits standard STGCR, STOCR, and STTCL positive turning toolholders.
3. Technical Specifications & Metric/Imperial Model Comparison
ISO / ANSI Designation Code Breakdown
| Specification Parameter | Metric Unit (ISO Standard) | Imperial Unit (ANSI Standard) |
|---|---|---|
| Full Insert Model Designation | TPGX160304 HTI10 | TPGX321 HTI10 |
| Inscribed Circle (IC) | 9.525 mm | 0.375 in (3/8") |
| Thickness (S) | 3.18 mm | 0.125 in (1/8") |
| Corner Nose Radius (RE) | 0.40 mm | 0.0156 in (1/64") |
| Fixing Hole Diameter (d1) | 3.80 mm | 0.150 in |
| Relief Angle | 11° (Positive) | 11° (Positive) |
| Usable Cutting Edges | 3 Edges (Single-Sided) | 3 Edges (Single-Sided) |
Recommended Cutting Parameters for HTI10 Grade
| ISO Material Group | Cutting Speed Vc (m/min / SFM) | Feed Rate fn (mm/rev / IPR) | Depth of Cut ap (mm / in) |
|---|---|---|---|
| ISO N Aluminum Alloys & Non-Ferrous (6061, 7075) | 300 - 800 m/min (980 - 2620 SFM) | 0.08 - 0.30 mm/rev (.003 - .012 IPR) | 0.2 - 3.0 mm (.008 - .118 in) |
| ISO N Copper, Brass & Bronze | 200 - 500 m/min (655 - 1640 SFM) | 0.06 - 0.25 mm/rev (.002 - .010 IPR) | 0.1 - 2.5 mm (.004 - .098 in) |
| ISO K Gray Cast Iron & Plastics | 150 - 350 m/min (490 - 1150 SFM) | 0.10 - 0.30 mm/rev (.004 - .012 IPR) | 0.5 - 3.0 mm (.020 - .118 in) |
Need Precise Feeds and Speeds Calculations for Your CNC Lathe?
Optimize tool life, prevent built-up edge, and calculate precise spindle speeds (RPM) and feed rates (IPM/MMPM) tailored to your exact workpiece diameter and material hardness.
Open Interactive Speeds and Feeds Calculator →Matching External & Internal Positive Turning Toolholders
Mount TPGX 160304 / TPGX321 inserts directly into standard positive pin-lock or screw-on turning shanks:
Browse Compatible STGCR / STOCR Turning Toolholders →4. Product Application Scenarios
Mitsubishi TPGX160304 HTI10 inserts excel in high-speed non-ferrous and precision machining applications:
- Automotive Aluminum Components: High-speed finishing of aluminum cylinder heads, transmission housings, and pistons.
- Aerospace Non-Ferrous Machining: Precision profiling and facing of aerospace aluminum structural frames and brackets.
- Brass & Copper Fitting Production: High-volume turning of plumbing fixtures, electrical connectors, and decorative brass hardware.
- General Precision Engineering: Mirror-finish turning of engineering plastics, acrylics, and gray cast iron components.
5. Tooling & Equipment Compatibility
Conforms strictly to ISO 1832 and ANSI B212.4 indexable insert standards. Fully compatible with standard TPGX 1603 toolholder pockets across major global brands:
Mitsubishi MaterialsSandvik CoromantIscarKennametalKyoceraTungaloySeco ToolsWalter
6. Uncoated Grade Comparison & Equivalent Models
| Manufacturer | Uncoated Grade Equivalent | Primary Application Target |
|---|---|---|
| Mitsubishi (Original) | HTI10 | ISO N Aluminum & Non-Ferrous High-Speed Finishing |
| Sandvik Coromant | H10 / H13A | Non-ferrous materials & cast iron |
| Kyocera | KW10 | Uncoated micro-grain carbide for aluminum |
| Iscar | IC20 / IC07 | General machining of non-ferrous metals |
7. Why Choose Mitsubishi Cutting Tools & Verified Reviews
We are an authorized distributor of 100% genuine Mitsubishi cutting tools. Every pack is factory-sealed with full heat lot traceability.
"HTI10 is unmatched for mirror finishes on 6061 aluminum!"
We run these TPGX160304 inserts on our Haas TL-1 lathe turning aluminum aerospace parts. The sharp uncoated edge prevents any aluminum smearing or BUE. Exceptional surface quality.
— Michael R., CNC Job Shop Owner (USA) 🇺🇸
"Hervorragende Schärfe für die Aluminiumbearbeitung."
Die HTI10 Qualität liefert exzellente Standzeiten und sehr saubere Oberflächen bei der Drehbearbeitung von AlMgSi1.
— Stefan W., Präzisionstechnik (Germany) 🇩🇪
"Ottimi inserti per tornitura di leghe leggere e ottone."
Tagliente affilatissimo e zero tagliente di riporto su ottone e alluminio. Altamente consigliati.
— Marco B., Meccanica Generale (Italy) 🇮🇹
"アルミ合金の高速仕上げ加工で素晴らしい面粗度が得られます。"
HTI10のシャープな切れ刃により、バリの発生を抑えた高精度な加工が可能です。
— Kenji T., Tooling Specialist (Japan) 🇯🇵
8. Frequently Asked Questions (AI & Machinist Knowledge Base)
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This Mitsubishi Materials insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.