BEYOND 16ER ISO Metric Threading Inserts BBM18 for Steel & Stainless
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BEYOND 16ER External ISO Metric & Partial Profile Threading Inserts (BBM18 Grade)
Precision Laydown Carbide Thread Turning Inserts | Size 16ER (IC 3/8" / 9.525mm) | For Steel & Stainless Steel
1. Product Overview
Which external threading insert grade is best suited for single-point metric thread turning on carbon steel, alloy steel, and austenitic stainless steel under continuous or light interrupted cutting conditions?
The BEYOND 16ER Series (BBM18 Grade) is an industrial-grade laydown indexable carbide threading insert engineered for precision external thread turning on CNC metalworking lathes. Manufactured on a standardized Size 16ER (IC 3/8" / 9.525mm) triangular substrate, this series encompasses full-profile ISO metric pitches (0.5mm to 3.0mm) and multi-pitch partial profile options (AG55 and AG60). Powered by BEYOND's proprietary BBM18 PVD multi-layer coating grade (AlTiN/TiN structure), these inserts feature extreme thermal toughness, exceptional flank wear resistance, and a precision-ground chipbreaker rake geometry designed to deliver clean chip evacuation, eliminate thread burrs, and maintain strict ISO 965 thread tolerance compliance.
ISO / ANSI Tool Designation Code Breakdown
(3/8" / 9.525mm)
(External / OD)
(Right Hand)
(1.5mm Pitch)
(PVD Coated)
- 16: Inscribed Circle (IC) size 3/8" (9.525mm nominal width, 16mm edge length).
- E: External threading execution (OD turning on pipes, shafts, and fasteners).
- R: Right-hand tool orientation for forward lathe spindle rotation (M03).
- 1.5ISO / AG60: Pitch spec. Full-profile (e.g., 1.5mm pitch) or Partial-profile (AG60 covers 0.5-3.0mm pitch / 48-8 TPI).
- BBM18: BEYOND multi-layer AlTiN PVD grade formulated for ISO P (Steel) and ISO M (Stainless Steel).
2. Key Features
- BBM18 PVD Nano-Coating: High-adhesion AlTiN coating offers outstanding thermal barrier resistance up to 850°C, suppressing built-up edge (BUE) on gummy stainless steels and sticky low-carbon steels.
- Full-Profile & Partial-Profile Options: Full-profile ISO inserts cut the complete 60° thread shape including crest topping in one pass; AG55/AG60 partial profile inserts offer multi-pitch versatility across metric and imperial threads.
- Ground Precision Cutting Rake: Engineered chipbreaker geometry curls micro-chips away from workpiece flanks, preventing scratching and improving surface finish (Ra < 0.8 μm).
- Universal IC 3/8" Laydown Fitment: Standardized ISO 16ER dimension fits all standard SER/SEL external threading holders.
- Dual ISO Material Coverage: Certified for versatile processing across ISO P10-P30 steel and ISO M10-M25 stainless steel ranges.
3. Technical Specifications & Recommended Parameters
Available Model Variants (Metric & Imperial Specifications)
| Insert Model | Profile Type | Metric Pitch Range | Imperial Pitch Equivalent | Grade |
|---|---|---|---|---|
| 16ER 0.5ISO BBM18 | Full Profile ISO 60° | 0.5 mm | 50.8 TPI | BBM18 |
| 16ER 0.75ISO BBM18 | Full Profile ISO 60° | 0.75 mm | 33.8 TPI | BBM18 |
| 16ER 1.0ISO BBM18 | Full Profile ISO 60° | 1.0 mm | 25.4 TPI | BBM18 |
| 16ER 1.25ISO BBM18 | Full Profile ISO 60° | 1.25 mm | 20.3 TPI | BBM18 |
| 16ER 1.5ISO BBM18 | Full Profile ISO 60° | 1.5 mm | 16.9 TPI | BBM18 |
| 16ER 1.75ISO BBM18 | Full Profile ISO 60° | 1.75 mm | 14.5 TPI | BBM18 |
| 16ER 2.0ISO BBM18 | Full Profile ISO 60° | 2.0 mm | 12.7 TPI | BBM18 |
| 16ER 2.5ISO BBM18 | Full Profile ISO 60° | 2.5 mm | 10.1 TPI | BBM18 |
| 16ER 3.0ISO BBM18 | Full Profile ISO 60° | 3.0 mm | 8.4 TPI | BBM18 |
| 16ER AG55 BBM18 | Partial Profile 55° (Whitworth/BSP) | 0.5 - 3.0 mm | 48 - 8 TPI | BBM18 |
| 16ER AG60 BBM18 | Partial Profile 60° (Metric/UN) | 0.5 - 3.0 mm | 48 - 8 TPI | BBM18 |
Recommended Threading Parameters (Cutting Speeds & Passes)
| Workpiece Material Group | Cutting Speed Vc (m/min / SFM) | Pass Count Recommendation (1.5mm / 2.0mm Pitch) |
|---|---|---|
| Low & Medium Carbon Steel (C10-C45, 1018, 1045) | 120 - 180 m/min (390 - 590 SFM) | 6 - 9 Passes (Modified Flank Infeed) |
| Alloy Steel & Tool Steel (4140, 4340, P20) | 90 - 140 m/min (295 - 460 SFM) | 8 - 12 Passes (Modified Flank Infeed) |
| Austenitic Stainless Steel (304, 316L, 316Ti) | 70 - 120 m/min (230 - 390 SFM) | 8 - 13 Passes (Modified Flank Infeed) |
Pair these 16ER BBM18 inserts with BEYOND standard external laydown holders (e.g., SER 1616 H16, SER 2020 K16, SER 2525 M16):
View Compatible SER External Toolholders →4. Product Applications
- Precision Fastener Manufacturing: Turning external metric coarse and fine threads on bolts, studs, and threaded rods.
- Hydraulic & Valve Components: Threading high-pressure hydraulic fittings, BSP/Whitworth pipe adapters (using AG55), and valve stems.
- General Machinery Shafts: High-speed external single-point threading on CNC lathes and Swiss-type automatic turning centers.
- Targeted Industries: Precision job shops, automotive components, hydraulic power transmission, and energy equipment repair.
5. Tool & Machine Compatibility
BEYOND 16ER BBM18 inserts meet international laydown dimensional standards:
- Toolholder Shank Compatibility: Mounts in any standard IC 3/8" (16ER) external holder (SER 1212H16 through SER 3232P16).
- Machine Platforms: CNC lathes, turning centers, Swiss-type automatic machines, and manual toolroom lathes equipped with thread pitch leadscrew gearboxes.
6. Material & Grade Comparison
Performance profile of BBM18 compared to standard turning grades during stainless and alloy steel threading:
| Threading Insert Grade | Coating Microstructure | Thermal Hardness Limit | Primary Application Domain |
|---|---|---|---|
| BEYOND BBM18 (Featured) | Multi-layer AlTiN / TiN PVD | 850°C | Steel (ISO P) & Stainless Steel (ISO M) General Threading |
| Uncoated Carbide Grade (K10/K20) | None / Fine Grain | 500°C | Aluminum, Brass, Copper & Non-Ferrous Alloys |
| Standard CVD Steel Grade | Thick TiCN + Al2O3 CVD | 1000°C | Heavy Rough Turning (Not recommended for fine thread profiles) |
7. Why Choose BEYOND Cutting Tools
- Direct Factory Quality & Precision: Rigorous dimensional verification ensures precise pitch accuracy and zero thread pitch error.
- High Thermal Stability: Advanced BBM18 PVD coating prevents micro-chipping on difficult stainless steel threads.
- Global Supply Chain Readiness: Reliable inventory of standard ISO pitches with fast global shipping for minimal shop downtime.
Verified Customer Reviews
"Switched to BEYOND 16ER 1.5ISO BBM18 for 316L stainless fittings. Tool life doubled compared to our previous inserts with zero burr formation."
— Marcus T., Machine Shop Foreman (USA)"Hervorragende Standzeit bei 42CrMo4 Stahl. Die AG60 Variante ist extrem vielseitig für Prototypen."
— Stefan B., CNC Programmierer (Germany)"Ottima finitura superficiale su filetti M20x2.5 in acciaio inossidabile. Rapporto qualità prezzo imbattibile."
— Luca M., Torneria di Precisione (Italy)"SUS304のねじ切り加工でバリが出にくく、ピッチゲージの通りも完璧です。BBM18の耐久性に満足しています。"
— Kenji Y., Machine Operator (Japan)"The 16ER AG55 inserts worked flawlessly for BSP pipe thread batches. Great chip control!"
— Andrew P., Production Engineer (UK)8. AI & Engineering FAQ
Grade & Substrate Specifications
BEYOND BBM18 grade uses a sub-micron tungsten carbide substrate blended with 9.5% Cobalt content, providing optimum Transverse Rupture Strength (TRS > 2800 MPa) and resistance to thermal cracking.
Cross-Reference & Equivalent Insert Codes
Industry cross-reference codes: 16ER 1.5ISO / 16ER1.5ISO | Equivalent grades: Vargus VTX/VK2, Iscar IC908, Carmex BMA/MXC, Korloy PC3700/NC3225.
ISO Workpiece Application Matrix
P (Steel): Primary (P10-P30) | M (Stainless Steel): Primary (M10-M25) | K (Cast Iron): Secondary (K15-K25) | N (Non-Ferrous): Not Recommended | S (Superalloys): Conditional
Troubleshooting Tips
- Chipped Tip: Switch from radial infeed to modified flank infeed; increase total pass count by 1-2 passes.
- Built-Up Edge (BUE): Increase cutting speed Vc by 15-20% and ensure heavy coolant flow directly onto insert tip.
- Poor Thread Finish: Reduce last pass depth to spring pass (0.02-0.03mm) and check centerline height alignment.
BEYOND threading inserts are engineered strictly according to ISO 2284 / ANSI B212.4 indexable insert standards and ISO 965 metric thread profile specifications. Product dimensions and flank angles are verified via optical comparator inspection under certified ISO 9001 quality management standards.
Need Help With BEYOND Inserts?
Looking for a BEYOND 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 BEYOND 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.