SUMITOMO TPMT110304N-SU AC630M Stainless Steel Turning Insert (TPMT 110304 / TPMT 221 Equivalent)
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SUMITOMO TPMT110304N-SU AC630M Absotech Carbide Stainless Steel Turning Insert
1. Product Overview
"Which indexable positive turning insert provides the absolute best combination of edge sharpness, low-force chip control, and adhesion resistance when fine-profiling gummy austenitic stainless steels or slender internal bores?"
The SUMITOMO TPMT110304N-SU AC630M is a premium, 11-degree positive clearance triangular carbide turning insert engineered precisely to eliminate deflection, chatter, and built-up edge (BUE) in high-precision internal boring and light external profiling. Highly optimized for the ISO M10 to M30 spectrum (including AISI 304, 316, duplex 2205, and precipitation-hardening superalloys), this insert features Sumitomo's breakthrough AC630M Absotech Coating Technology. By deploying an ultra-smooth, high-adhesion nano-thin PVD layer over a tough submicron carbide core, it maximizes resistance to peeling, micro-chipping, and boundary notch wear. The high-performance -SU Type Chipbreaker features an exceptionally sharp, positive rake wall engineered explicitly for light machining and finish profiling to curl and snap stringy stainless chips cleanly at very low feed rates and shallow depths of cut.
2. Product Key Features
- Absotech Advanced PVD Matrix: Ultra-dense coating layer provides exceptional boundary wear resistance and superior thermal barriers during internal boring cycles where heat accumulates rapidly.
- High-Toughness Submicron Core: Advanced carbide substrate protects the vulnerable nose tip against sudden micro-fractures during interrupted cuts or multi-pass transitions.
- Optimized -SU Sharp Finishing Geometry: High-rake positive configuration reduces cutting forces drastically, completely suppressing chatter on long-overhang boring bars or thin-walled components.
- Universal ISO Indexing Standard: Engineered to strict structural specifications to ensure highly repeatable dimensional accuracy and absolute concentricity upon insert swap.
3. Technical Specifications & Dimension Matrix
🔍 ISO / ANSI Industrial Nomenclature Decoding Matrix
| Dimension Parameter | Metric Specification (ISO) | Imperial Equivalent Benchmark (ANSI) |
|---|---|---|
| Product Designation Model | TPMT110304N-SU | TPMT 221-SU (TPMT221) |
| Inscribed Circle (IC) Diameter | 6.35 mm | 0.250 in (1/4") |
| Insert Thickness (s) | 3.18 mm | 0.125 in (3/32") |
| Nose Corner Radius (r) | 0.4 mm | 0.0157 in (1/64") |
📊 Recommended Technical Cutting Parameters
| Workpiece Material Category | Cutting Speed (Vc) | Feed Rate (f) / Depth of Cut (ap) |
|---|---|---|
| Austenitic Stainless Steel (AISI 304 / 316) | 130 - 230 m/min (425 - 755 SFM) | 0.05 - 0.20 mm/rev (0.002 - 0.008 ipr) ap: 0.2 - 1.5 mm (0.008 - 0.059 in) |
| Duplex & Super Duplex Stainless (Alloy 2205 / 2507) | 75 - 150 m/min (245 - 490 SFM) | 0.04 - 0.15 mm/rev (0.0015 - 0.006 ipr) ap: 0.15 - 1.2 mm (0.006 - 0.047 in) |
This TPMT 1103 / TPMT 22 positive configuration requires precise screw clamping block seats to prevent micro-movement under load.
Browse Matching STFPR / STGPR / STUPR Internal Boring Bars & Toolholders →4. Product Application Scenarios
The AC630M high-toughness core delivers high predictability across highly abrasive production workflows:
5. Toolholder & Equipment Compatibility
Machined to universal standardization tolerances, this insert retrofits seamlessly onto global tooling systems:
- Boring Bars & Toolholders: Fully compatible with standard indexable positive shanks (CTFPR/L, STFPR/L, STGPR/L) and solid carbide boring bar assemblies built for TPMT1103 / TPMT221 pockets.
- CNC Equipment: Engineered for precision CNC lathes, Swiss-type automatic lathes, and multi-axis turn-mill machinery (Citizen, Star, Tsugami, Haas, Mazak) operating high-accuracy finishing cycles.
6. Industrial Grade Comparison Matrix
| Brand | Equivalent Grade Reference | Application Range | Coating Technology |
|---|---|---|---|
| SUMITOMO | AC630M (Target) | ISO M10 - M30 / Premium Stainless Steel Internal Finishing Matrix | Absotech Superior Toughness Anti-Peeling PVD Coating |
| Sandvik Coromant | GC1115 / GC2015 | ISO M10 - M25 / Light Internal Stainless Boring Sequences | High-wear PVD matrix optimized for positive edge geometries |
| Kennametal | KCU10 / KC5010 | ISO M05 - M20 / High-Speed Superalloy and Stainless Finishing | Advanced TiAlN PVD multilayer featuring high hot-hardness properties |
| Iscar | IC907 / IC807 | ISO M10 - M30 Precision Profiling and Boring Workflows | PVD coating treated with special post-coat smoothing algorithms |
7. Why Choose Us & Verified Global Performance Evaluations
Real-world feedback from global job shops focusing on precision alloy material removal:
"We run these TPMT 221-SU inserts on our Swiss lathes for internal boring of 316 medical tubes. The edge sharpness is absolutely key—zero squealing, zero chatter, and the surface finish easily passes our engineering requirements."
"Hervorragende Leistung bei kleinen Innendurchmessern in Edelstahl 1.4404. Der positive 11-Grad-Freiwinkel reduziert die Reibung dramatisch. Die Absotech PVD-Beschichtung hält das Aufbauschneiden komplett fern."
"Perfetto per finitura di precisione su valvole inossidabili. Truciolo sempre ben spezzato anche con avanzamenti minimi grazie alla forma del rompitruciolo -SU."
"SUS304の小径内径ボーリング加工でテスト。他社PVDチップだとワークが逃げて寸法がバラついていましたが、このTPMTは切れ味が鋭いため狙い通りの寸法でピタッと決まります。耐摩耗性も文句なしです。"
8. Technical Machining FAQ
Q: Why should I choose the -SU chipbreaker over the -GU chipbreaker for internal boring?
A: The -SU chipbreaker features a significantly sharper edge design and a steeper positive rake curve than the general-purpose -GU profile. Internal boring operations naturally suffer from tight clearances and a higher tendency to chatter; the -SU layout drastically cuts down radial forces to stop vibration before it starts, while rolling chips tighter so they clear out easily via the boring bar flute.
Q: Chips are bird-nesting inside my blind bore when using this insert. What is the cause?
A: Bird-nesting occurs if the depth of cut (ap) drops below the chipbreaker's operational activation floor (less than 0.15mm), causing the material to smear rather than fracture. Slightly increase your depth of cut or feed rate to force the stringy stainless chip against the positive step wall of the -SU profile, or adjust your coolant nozzle to flush directly into the bore.
Q: Can the AC630M grade handle continuous cutting in hardened stainless or duplex materials?
A: Absolutely. Sumitomo's Absotech coating layer possesses high chemical and thermal stability, specifically blocking notch wear and boundary chipping typical of duplex 2205 or precipitation-hardened alloys during high-speed finishing cycles.
💡 Technical Grade Comparison & Troubleshooting Guide
Workpiece Material Matrix (ISO Classifications): Optimized explicitly for the ISO M10 to M30 alloy spectrum. Demonstrates reliable performance trends across common premium austenitic families (AISI 304, 316), heavy martensitic configurations, and challenging duplex setups (Alloy 2205) susceptible to high structural deflection.
Machining Troubleshooting Guide: If high built-up edge (BUE) or chemical chip welding occurs, increase your cutting velocity (Vc) to step past the alloy's adhesion threshold. If high thermal deformation or plastic collapse is observed at the nose tip, lower your surface speed or switch to a harder CVD matrix grade like AC6030M.
Authorized Reference Documentation & Endorsements: Dimensional configurations, tolerance boundaries, and geometric nomenclature conform entirely with established global ISO/ANSI standards. Structural capabilities and operating limitations are cross-verified with official industrial processing guides published by Sumitomo Electric Hardmetal Corporation.
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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.