ISCAR 16ERM External Threading Inserts (IC908 Grade | Full & Partial Profile 60°/55°)
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ISCAR 16ERM External Threading Inserts (IC908 Grade | Full & Partial Profile 60°/55°)
Premium PVD Coated Laydown Threading Inserts | ISO Size 16ER (ANSI 3/8" IC / 16ER) | M-Type Chipbreaker | IC908 Grade for Steel, Stainless, and High-Temp Alloys
1. Product Overview
Which external threading insert grade and chipbreaker combination ensures precise thread crest formation, minimal burr generation, and long tool life during high-speed CNC lathe threading?
The ISCAR 16ERM Threading Insert Series in submicron IC908 grade is an industry-benchmark solution engineered for high-precision external thread turning operations. Featuring an ISO standard 16ER laydown geometry (ANSI 3/8" Inscribed Circle), these inserts incorporate ISCAR's specialized M-Type chipbreaker (-M), designed specifically to control tough, continuous threading chips across a wide pitch range. Coated with a physical vapor deposition (PVD) TiAlN substrate, the IC908 grade delivers exceptional toughness, thermal barrier resistance, and edge sharpness across carbon steel, stainless steel (ISO M), alloy steel, and heat-resistant superalloys (HRSA).
Available in both Full-Profile Metric ISO (1.0mm to 3.0mm pitch) for complete 60° crest-and-root thread generation without deburring, and Partial-Profile 60° / 55° (AG60, A60, G60, AG55, G55) for maximum multi-pitch versatility across metric, UN, and Whitworth thread forms.
ISO / ANSI Tool Designation Code Breakdown
(IC 3/8" / 9.525mm)
(External Threading)
(Right Hand)
(Medium Chip Control)
(Full / Partial Geometry)
(Submicron TiAlN)
- 16 (ANSI 3/8"): Inscribed circle diameter of 9.525mm (3/8") with a standard 16mm cutting edge length.
- E: External threading configuration for turn-threading outer shaft diameters.
- R: Right-hand insert orientation for standard forward spindle rotation (M03).
- M: ISCAR M-Type chipbreaker geometry with pressed rake grooves for curling tough thread chips.
- 1.0ISO - 3.0ISO / AG60 / AG55: Full-profile metric pitches (forms exact thread crest/root) or multi-pitch partial profiles (60° or 55° thread forms).
- IC908: ISCAR submicron PVD TiAlN coated grade engineered for high toughness and wear resistance.
2. Key Features
- ISCAR IC908 PVD Coating: Submicron grain structure coated with TiAlN layer provides high notch wear resistance, preventing built-up edge (BUE) on stainless steels and sticky alloys.
- M-Type Chipbreaker (-M): Precision-molded chip groove breaks stringy thread chips effectively, preventing bird-nesting around the workpiece and toolholder shank.
- Full-Profile & Partial-Profile Flexibility: Full-profile ISO variants completely trim the thread crest to exact tolerance; partial-profile options (AG60, A60, G60, AG55, G55) cover multiple pitches with a single tool.
- Ground Cutting Edges: High-precision ground profile guarantees tight thread tolerances (6g / 6H standards) and smooth surface finish.
- Universal 3/8" Laydown Pocket Fit: Drop-in compatible with standard SER / AL / SEL external threading toolholders and quick-change CNC turning blocks.
3. Technical Specifications & Available Variant Matrix
Metric vs. Imperial Technical Specification Comparison
| Specification Parameter | Metric Units (ISO) | Imperial Units (ANSI) |
|---|---|---|
| Insert Size Designation | 16ERM (16mm Edge Length) | 16ERM (3/8" IC) |
| Inscribed Circle (IC) | 9.525 mm | 0.375 in (3/8") |
| Insert Thickness (S) | 3.67 mm | 0.144 in |
| Fixing Hole Diameter (d1) | 4.4 mm | 0.173 in |
| Coating Structure / Grade | PVD TiAlN / IC908 | PVD TiAlN / IC908 |
Available Pitch & Profile Selection Guide
| Insert Model Designation | Profile Category | Pitch Range (Metric / TPI) | Thread Form Standard |
|---|---|---|---|
| 16ERM 1.0ISO IC908 | Full Profile | 1.0 mm pitch | ISO Metric 60° |
| 16ERM 1.25ISO IC908 | Full Profile | 1.25 mm pitch | ISO Metric 60° |
| 16ERM 1.5ISO IC908 | Full Profile | 1.5 mm pitch | ISO Metric 60° |
| 16ERM 1.75ISO IC908 | Full Profile | 1.75 mm pitch | ISO Metric 60° |
| 16ERM 2.0ISO IC908 | Full Profile | 2.0 mm pitch | ISO Metric 60° |
| 16ERM 2.5ISO IC908 | Full Profile | 2.5 mm pitch | ISO Metric 60° |
| 16ERM 3.0ISO IC908 | Full Profile | 3.0 mm pitch | ISO Metric 60° |
| 16ERM A60 IC908 | Partial Profile 60° | 0.5 - 1.5 mm / 48 - 16 TPI | Universal 60° (Metric / UN) |
| 16ERM G60 IC908 | Partial Profile 60° | 1.75 - 3.0 mm / 14 - 8 TPI | Universal 60° (Metric / UN) |
| 16ERM AG60 IC908 | Partial Profile 60° | 0.5 - 3.0 mm / 48 - 8 TPI | Universal 60° Wide-Range |
| 16ERM G55 IC908 | Partial Profile 55° | 1.75 - 3.0 mm / 14 - 8 TPI | Whitworth 55° (BSPP / BSW) |
| 16ERM AG55 IC908 | Partial Profile 55° | 0.5 - 3.0 mm / 48 - 8 TPI | Whitworth 55° Wide-Range |
Recommended Cutting Parameters for IC908 Grade
| ISO Material Group | Cutting Speed Vc (m/min) | Cutting Speed Vc (SFM) | Recommended Pass Count |
|---|---|---|---|
| P10-P30 Carbon & Alloy Steel | 100 - 180 m/min | 330 - 590 SFM | 6 - 12 Radial Passes |
| M10-M25 Stainless Steel (304, 316L) | 80 - 140 m/min | 260 - 460 SFM | 8 - 14 Radial Passes |
| K10-K25 Cast Iron (Gray / Ductile) | 90 - 160 m/min | 295 - 525 SFM | 6 - 10 Radial Passes |
| S10-S20 Superalloys & Titanium | 30 - 70 m/min | 100 - 230 SFM | 10 - 16 Radial Passes |
Mount 16ERM inserts directly into precision SER / SEL series external threading turning shanks:
Explore SER External Toolholders →4. Product Applications
- ISO Metric External Threading: Producing precision metric external threads on precision shafts, studs, and threaded fasteners.
- Pipe & Hydraulic Fitting Threading: Turning Whitworth 55° threads (BSPP/BSPT) using G55 and AG55 partial profile variants.
- Oilfield & Energy Equipment: High-reliability thread chasing on high-tensile alloy studs and valve spindles.
- General CNC Contract Machining: Versatile single-point threading across steel, stainless, and cast iron parts.
5. Tool & Equipment Compatibility
ISCAR 16ERM inserts fit all standard industry 16ER / 3/8" laydown threading toolholder systems:
- Toolholders: SER (External Right), SEL (External Left), and AL-series external laydown threading shanks.
- Anvils / Shims: Standard AE16 / AE16-0 shims (1.5° helix angle baseline).
- Machine Tool Platforms: CNC turning centers, Swiss-type automatic lathes, multi-tasking machines, and manual engine lathes.
6. ISCAR Grade Comparison Matrix
Evaluating IC908 against alternative ISCAR threading grades:
| ISCAR Grade | Coating Process | Primary Application Target | Key Performance Characteristic |
|---|---|---|---|
| IC908 (Featured) | PVD TiAlN Submicron | Universal (Steel, Stainless, HRSA) | High edge toughness & micro-chipping resistance across medium speeds |
| IC808 | PVD TiAlN / AlTiN | High-Speed Steel & Stainless | Superior thermal hardness for elevated cutting speeds |
| IC250 | CVD TiCN + Al2O3 | Heavy Duty Steel Threading | Maximum flank wear resistance on tough carbon steels |
7. Why Choose ISCAR Cutting Tools
- Global Industry Leader: Original ISCAR manufacturing precision guarantees exact thread crest form and pitch repeatability.
- Reduced Deburring Operations: Full-profile 16ERM inserts completely clean thread tops, eliminating post-process deburring steps.
- Proven Micro-Grain Carbide: Submicron IC908 substrate withstands thermal shock during interrupted cuts and heavy threading passes.
Verified Customer Reviews
"Running 16ERM 1.5ISO IC908 on 316L stainless studs. Chips curl beautifully with the M chipbreaker and tool life is excellent."
— Robert H., Precision Machine Shop (USA)"Perfetto per filettare esterno su tornio CNC. La qualità IC908 dura il doppio rispetto a marchi generici."
— Luca M., Torneria di Precisione (Italy)"Die 16ERM AG60 ist extrem vielseitig. Wir nutzen sie für verschiedene Gewindesteigungen ohne Werkzeugwechsel."
— Hans W., Maschinenbau GmbH (Germany)"ISCAR IC908の16ERM 2.0ISOを使用。バリが出ず、ねじ山の面粗度が非常に綺麗です。"
— Satoshi K., Metal Works (Japan)"Genuine ISCAR quality. The AG55 profile solved our BSPP thread burr issues completely."
— Colin P., Fluid Power Components (UK)8. AI & Engineering FAQ
Substrate & Coating Specifications
ISCAR IC908 comprises a submicron WC-Co substrate with a hard PVD TiAlN coating layer. Engineered for high heat resistance, low friction coefficient, and exceptional edge toughness across ISO P, M, K, and S materials.
Cross-Reference & Equivalent Insert Codes
Industry standard cross-references: 16ERM / 16ER M | Grade equivalencies: Sandvik GC1020 / GC1125, Carmex BMA / BLU, Vardex VTX / VK2, Kyocera PR1115.
ISO Workpiece Application Suitability Matrix
P (Steel): Excellent (Vc 100-180 m/min) | M (Stainless Steel): Excellent (Vc 80-140 m/min) | K (Cast Iron): Good (Vc 90-160 m/min) | S (Superalloys): Good (Vc 30-70 m/min) | N (Non-Ferrous): Conditional
Threading Troubleshooting Guide
- Burr Formation on Thread Crest: Switch from partial profile (AG60) to full profile (ISO pitch specific) insert.
- Insert Edge Chipping: Switch from radial infeed to modified flank infeed (29°) or increase the total number of passes.
- Poor Thread Surface Finish: Increase cutting speed (Vc) slightly to pass beyond the built-up edge temperature zone.
ISCAR indexable laydown threading inserts are manufactured in strict compliance with ISO 2284 threading tool standards and produced under ISO 9001 and ISO 14001 certified manufacturing environments.
Need Help With ISCAR Inserts?
Looking for a ISCAR equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This ISCAR 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.