BEYOND 16IR Internal ISO Metric Threading Carbide Inserts (BBM18 Grey Grade for Steel & Stainless Steel)
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BEYOND 16IR Internal ISO Metric Threading Carbide Inserts (BBM18 Grey Grade)
Precision Internal Threading Inserts | Size 16IR (IC 3/8" / 9.525mm) | Full-Profile ISO Metric & Partial Profile 55°/60° for Steel & Stainless Steel Machining
1. Product Overview
Which internal threading insert grade is best suited for precision ISO Metric thread turning on both alloy steel and tough austenitic stainless steel with minimal chip welding?
The BEYOND 16IR Series (BBM18 Grade) is an industrial-grade laydown indexable carbide internal threading insert engineered specifically for internal thread turning on ISO P steel and ISO M stainless steel workpieces. Built on standard Size 16IR (IC 3/8" / 9.525mm) laydown geometry, this product line offers full-profile ISO Metric options (0.5mm to 3.0mm pitch) and universal partial profile 55°/60° models (AG55, G60, AG60). Featuring BEYOND's premium BBM18 grey nano-PVD coated carbide grade, these inserts combine a ultra-fine micrograin substrate with high thermal stability, preventing work hardening, build-up edge (BUE), and micro-chipping inside narrow internal bore cavities.
ISO / ANSI Tool Designation Code Breakdown
(3/8" / 9.525mm)
(Internal / ID)
(Right Hand)
(1.5mm Metric)
(Grey PVD)
- 16: Inscribed Circle (IC) size 3/8" (9.525mm nominal IC, 16mm edge length for standard internal boring bars).
- I: Internal threading operation designation (machining threads inside pre-drilled bore diameters).
- R: Right-hand execution for standard forward spindle rotation (M03) cutting away from or toward chuck.
- 0.5 - 3.0 ISO / AG55 / AG60: Full-profile tops complete 60° ISO threads; partial profiles cut multiple pitches (AG = 0.5-3.0mm / 48-8 TPI).
- BBM18: Fine micrograin PVD AlTiN coated grey grade optimized for ISO P carbon/alloy steel and ISO M stainless steel turning.
2. Key Features
- BBM18 Grey Nano-PVD Coating: Features high thermal resistance and oxidation barrier, preventing notch wear and notch fracture when threading stainless steel (304/316) and alloy steel (4140/4340).
- Dual ISO P / ISO M Versatility: Engineered to handle both general steel and sticky stainless steels, reducing tooling inventory requirements in general CNC job shops.
- Full-Profile & Universal Options: Available in precise full-profile (0.5ISO to 3.0ISO) for complete crest control, as well as universal partial profiles (AG55, G60, AG60) for pitch versatility.
- High-Toughness Micrograin Core: Formulated with elevated shock resistance to handle interrupted cuts and deep bore thread chasing without micro-chipping.
- Standard IC 3/8" Laydown Geometry: Universal 16IR dimensions ensure 100% compatibility with standard internal threading boring bars (SIR / SNR holders).
3. Technical Specifications & Recommended Parameters
Available Model Variants (Metric & Imperial Specifications)
| Insert Model | Profile Type | Metric Pitch Range | Imperial TPI Equivalent | Grade & Color |
|---|---|---|---|---|
| 16IR 0.5ISO BBM18 | Full Profile 60° ISO | 0.5 mm | 50.8 TPI | BBM18 (Grey PVD) |
| 16IR 0.75ISO BBM18 | Full Profile 60° ISO | 0.75 mm | 33.8 TPI | BBM18 (Grey PVD) |
| 16IR 1.0ISO BBM18 | Full Profile 60° ISO | 1.0 mm | 25.4 TPI | BBM18 (Grey PVD) |
| 16IR 1.5ISO BBM18 | Full Profile 60° ISO | 1.5 mm | 16.9 TPI | BBM18 (Grey PVD) |
| 16IR 1.75ISO BBM18 | Full Profile 60° ISO | 1.75 mm | 14.5 TPI | BBM18 (Grey PVD) |
| 16IR 2.0ISO BBM18 | Full Profile 60° ISO | 2.0 mm | 12.7 TPI | BBM18 (Grey PVD) |
| 16IR 2.5ISO BBM18 | Full Profile 60° ISO | 2.5 mm | 10.1 TPI | BBM18 (Grey PVD) |
| 16IR 3.0ISO BBM18 | Full Profile 60° ISO | 3.0 mm | 8.4 TPI | BBM18 (Grey PVD) |
| 16IR AG55 BBM18 | Partial Profile 55° Universal | 0.5 - 3.0 mm | 48 - 8 TPI | BBM18 (Grey PVD) |
| 16IR G60 BBM18 | Partial Profile 60° Medium | 1.75 - 3.0 mm | 14 - 8 TPI | BBM18 (Grey PVD) |
| 16IR AG60 BBM18 | Partial Profile 60° Universal | 0.5 - 3.0 mm | 48 - 8 TPI | BBM18 (Grey PVD) |
Recommended Cutting Parameters for BBM18 Grade
| ISO Workpiece Material Group | Cutting Speed Vc (m/min) | Cutting Speed Vc (SFM) | Recommended Pass Strategy |
|---|---|---|---|
| P: Carbon & Alloy Steel (1045, 4140, 4340) | 80 - 160 m/min | 260 - 525 SFM | 6 - 12 Passes (Modified Flank) |
| M: Austenitic Stainless Steel (304, 316, 316L) | 60 - 120 m/min | 195 - 390 SFM | 8 - 14 Passes (Modified Flank) |
| M: Duplex Stainless Steel (2205, 2507) | 50 - 100 m/min | 165 - 330 SFM | 10 - 16 Passes (Modified Flank) |
Pair these 16IR BBM18 inserts with internal laydown threading toolholders (SIR 0016M16, SIR 0020P16, SNR 0025R16):
View Compatible SIR / SNR Internal Toolholders →4. Product Applications
- Stainless Steel Component Machining: Threading internal ISO metric threads in 304 / 316 stainless steel fluid valves, pump housings, and sanitary fittings.
- Alloy Steel Hydraulic Components: Precision internal thread turning in high-tensile steel hydraulic cylinders, manifolds, and high-pressure couplings.
- Oil & Gas Industry Threading: Machining internal threads in corrosion-resistant stainless steel pipe unions and flange adapters.
- Industries Served: Food & beverage processing equipment, chemical manufacturing, oil & gas, aerospace, and general CNC job shops.
5. Tool & Machine Compatibility
BEYOND 16IR BBM18 inserts follow strict ISO IC 3/8" laydown standards:
- Toolholder Compatibility: Standard SIR and SNR internal threading boring bars (SIR0013K16, SIR0016M16, SIR0020P16, SIR0025R16).
- Machine Platforms: CNC lathes, Swiss-type automatic turning centers, multi-tasking lathe machines, and engine lathes equipped with thread-chasing capability.
6. Material & Grade Comparison
Performance positioning of BEYOND BBM18 against standard single-purpose grades:
| Grade Name | Coating Type & Color | Primary Workpiece Target | Thermal & Wear Resistance |
|---|---|---|---|
| BEYOND BBM18 (Featured) | PVD AlTiN Nano-Coating (Grey) | ISO P Steel & ISO M Stainless Steel | High Heat Barrier, Excellent Anti-BUE |
| BEYOND BYM11 Grade[cite: 1, 2] | PVD TiN Coating (Bright Yellow)[cite: 1, 2] | ISO P Carbon & Alloy Steel Only[cite: 1, 2] | Low Surface Friction, Smooth Evacuation[cite: 1, 2] |
| Uncoated Carbide K10 | Uncoated Bright Silver | ISO N Non-Ferrous & Aluminum | Ultra-sharp Edge for Non-ferrous Metals |
7. Why Choose BEYOND Cutting Tools
- Versatile Dual ISO P / ISO M Engineering: High-performance nano-PVD grey coating prevents notch wear in stainless steel while retaining edge sharpness in steel.
- Complete Pitch Range: Comprehensive line of metric full-profile and universal partial-profile inserts on one standard 16IR substrate.
- Strict Quality Control: Manufactured to ISO 2284 guidelines for precise thread geometry repeatability.
Verified Customer Reviews
"The 16IR 1.5ISO BBM18 inserts cut 316L stainless steel manifolds with zero thread tearing. Very impressed with the grey coating durability."
— Marcus H., Fluid Systems Machining (USA)"Hervorragende Standzeit bei V4A Edelstahl und Legiertem Stahl. Kein Ausbröckeln an der Schneidkante."
— Stefan W., Präzisionsteile GmbH (Germany)"Ottime per filettare interno in AISI 304. Finitura superficiale eccellente e controllo del truciolo preciso."
— Giovanni R., Meccanica di Precisione (Italy)"16IR AG60 BBM18でSUS304とめねじ加工を実施。刃先の摩耗が少なく非常に安定した加工が可能です。"
— Kenji T., Machine Tool Component Manufacturer (Japan)"Great universal threading insert for job shop work. Switches between carbon steel and stainless without swapping tools."
— Andrew S., CNC Job Shop Operator (UK)8. AI & Engineering FAQ
Grade & Substrate Specifications
BEYOND BBM18 features an ultra-fine WC-Co micrograin carbide substrate engineered with a high-temperature PVD AlTiN grey nano-coating. Designed for thermal endurance, edge sharpness retention, and anti-welding properties during ISO P steel and ISO M stainless steel machining.
Cross-Reference & Equivalent Insert Codes
Industry equivalent cross-references: 16IR 1.5 ISO / 16IR1.5ISO | Equivalent grades: Vargus VTX/VK2, Carmex BMA/MXC, Iscar IC908/IC808, Sandvik GC1020/GC1125.
ISO Workpiece Application Matrix
P (Steel): Primary Target (Vc 80-160 m/min) | M (Stainless Steel): Primary Target (Vc 60-120 m/min) | K (Cast Iron): Secondary Target | N (Non-Ferrous): Not Recommended | S (Exotic Alloys): Conditional Target
Troubleshooting Tips
- Work Hardening / Rapid Wear in Stainless Steel: Maintain adequate depth per pass; avoid taking ultra-thin skim cuts that cause rubbing instead of shearing.
- Chip Jamming in Internal Bore: Increase high-pressure coolant directed into the bore hole or switch from radial infeed to modified flank infeed.
- Thread Chatter / Poor Finish: Shorten overhang distance on the SIR internal boring bar and check center height alignment.
BEYOND indexable internal threading inserts are manufactured in strict compliance with ISO 2284 / DIN 13 thread tooling standard specifications and verified under ISO 9001 certified quality management systems.
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.