Tungaloy 16IR14UN-B AH725 Internal Threading Insert | 14 TPI UN Carbide
✓ In Stock & Fast Dispatch: Order processing: typically 1–3 business days after confirmation.
✓ Global Shipping: Delivery: generally 5–20 business days, depending on destination and shipping method.
✓ Guaranteed Quality: Check model, dimensions and compatibility before ordering. | Direct Factory Outlet
✓ Technical Support: Need grade selection help? Contact Engineer
💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
Tungaloy 16IR14UN-B AH725 Internal Threading Insert
1. Product Overview
The Tungaloy 16IR14UN-B AH725 is an industrial-grade, indexable carbide insert engineered specifically for high-efficiency internal threading applications. Featuring Tungaloy's proprietary AH725 PVD nano-coated grade combined with the highly advanced -B chipbreaker geometry, this tool solves the single biggest challenge in internal threading: bird-nesting and chip packing inside tight bores.
Whether you are threading carbon steel, alloyed steel, or difficult-to-machine stainless steel, this 14 TPI Unified National (UN) profile insert ensures pristine surface finishes, tight thread tolerances, and maximum tool longevity on your CNC lathe.
2. Product Key Features
- Premium AH725 Submicron Grade: Formulated with a highly wear-resistant nano-structured TiAlN PVD coating over a tough carbide substrate, extending tool life under elevated cutting temperatures.
- Advanced -B Chipbreaker Geometry: Specifically engineered with a 3D top-face profile that breaks long, stringy chips into short, manageable segments, preventing damage to both the thread profile and the workpiece boring.
- Precise 60° UN Profile: Full-profile design ensures exact 14 TPI threading without requiring manual deburring, providing perfect pitch consistency every single pass.
- Superior Edge Toughness: Optimized cutting edge preparation prevents micro-chipping and built-up edge (BUE), maintaining stability in interrupted or continuous cuts.
3. Technical Specifications & Dimension Comparison
This single insert model seamlessly serves both imperial-focused workshops and metric CNC programming lines. Below is the detailed structural blueprint mapping:
| Parameter Attribute | Imperial Measurement System | Metric Measurement System |
|---|---|---|
| Insert Size (Inscribed Circle - IC) | 3/8 inch | 9.525 mm |
| Threads Per Inch (TPI) / Pitch | 14 TPI | 1.814 mm Pitch |
| Thread Profile Standard | Unified National (UN 60-Degree) | ISO UN Standard Interchangeable |
| Threading Application Type | Internal (I) / Right Hand (R) | Internal (I) / Right Hand (R) |
| Substrate Coating Grade | AH725 (PVD TiAlN) | AH725 (PVD TiAlN) |
Recommended Cutting Parameters (Speed & Feed Passes)
| Workpiece Material Group | Cutting Speed (Vc) | Recommended Number of Threading Passes |
|---|---|---|
| Carbon & Alloy Steel (P Group) | 80 - 180 m/min (260 - 590 SFM) | 5 - 9 Progressive Passes |
| Stainless Steel (M Group) | 60 - 140 m/min (195 - 460 SFM) | 6 - 11 Progressive Passes |
| Cast Iron (K Group) | 70 - 150 m/min (230 - 490 SFM) | 5 - 9 Progressive Passes |
ISO / Tungaloy Nomenclature System Breakdown
Understanding every designation metric built into the 16IR14UN-B AH725 part number:
4. Industrial Application Scenarios
This heavy-duty tooling solution is highly utilized across demanding high-precision manufacturing segments:
- Oil & Gas Component Processing: Ideal for threading internal hydraulic valves, manifold blocks, and downhole piping connections requiring unyielding UN specs.
- Automotive & Motorsports Engineering: Excellent for customizing high-tensile wheel hubs, custom drive shafts, and internal gearbox threading.
- General Job Shop Production: The go-to versatile tool for CNC operators running mixed batches of alloy steels and 304/316 grade stainless steel components.
5. Universal Hardware Compatibility
The Tungaloy 16IR14UN-B insert is shaped according to strict global standard formatting guidelines. It is 100% physically compatible with any standard indexable internal threading boring bar that accepts a Size 16 (16mm / 3/8" IC) laydown insert, regardless of holder brand (compatible with Tungaloy, Iscar, Sandvik Coromant, Kennametal, and Seco holders).
6. Tungaloy Internal Grade Comparison Matrix
| Tungaloy Insert Grade | Primary Application Focus | Coating Structural Mechanics | Chipping Resistance Rating |
|---|---|---|---|
| AH725 (Featured) | Universal Steel, Stainless Steel, Alloys | PVD Multi-layered Nano-TiAlN | ⭐⭐⭐⭐⭐ Extreme Toughness |
| AH110 | Cast Iron, Highly Abrasive Metals | PVD TiAlN Premium Substrate | ⭐⭐⭐⭐ Balanced Wear |
| T313V | High-Speed Continuous Steel Turning | CVD Multi-layered Thick Coating | ⭐⭐⭐ Optimized for Speed |
7. Why Choose Tungaloy? Verified Customer Reviews
Precision machinists around the world depend on Tungaloy cutting chemistry to secure zero-scrap manufacturing metrics:
We were plagued by stringy bird-nest nests wrapping around our boring bars on the CNC lathes. Switched over to the 16IR14UN-B with the -B breaker. Chips come out in nice small needles now. AH725 grade wears beautifully.
Excellent tool life. We threaded 4140 pre-hardened alloy steel parts all day without needing to rotate the insert edge once. The 14 TPI pitch profile gage fits perfectly every time.
Produces incredibly clean internal thread profiles. Very rigid performance when paired with our heavy metal boring bars. Will continue stocking these.
内径ねじ切りで最も苦労する切り屑処理が大幅に改善されました。AH725はステンレス加工でも刃先が欠けにくく、安心して自動運転を任せられます。
8. Machine Operator AI-Style FAQ
Grade Comparison Tips & Equivalent Industry Models
If you are currently utilizing cross-brand inserts such as Iscar 16IR 14 UN IC908, Sandvik Coromant 266RL-16UN01A140M, or Carmex 16IR 14 UN BMA, the **Tungaloy 16IR14UN-B AH725** serves as a direct drop-in performance upgrade offering higher thermal threshold and advanced chip evacuation metrics.
Troubleshooting Index for CNC Operators
- Chipping on Cutting Crest: Reduce structural rotation speed (Vc) or switch from radial infeed to modified flank infeed method (1° to 3° angle deflection).
- Excessive Flank Wear: Increase coolant flow concentration directly aimed at the cut, or reduce cutting speed (Vc) by 15%.
- Built-up Edge (Metal Welding): Elevate cutting speed (Vc) to ensure the heat zone flows directly into the chip rather than adhering to the cutting substrate tip.
Workpiece Material Matrix Breakdown
✅ P (Steel Alloys): Optimized Performance | ✅ M (Stainless Steel Grades): Premium Yield Output | ✅ K (Cast Iron Blocks): Highly Compatible | ⚠️ S (Superalloys/Titanium): Feasible at Lowered Speed Rates.
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.