BEYOND NNK C20-25-110L-1T Indexable Multifunctional Milling & Boring Tool Holder (20mm Shank, 25mm Cutting Diameter, 110mm Length) - TNMG1604 Inserts Not Included
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BEYOND NNK C20-25-110L-1T CNC Indexable Milling & Boring Tool Holder
ISO/ANSI Standard Precision Tool Holder with 20mm Shank, 25mm Cutting Diameter, 110mm Length & TNMG1604 Pockets
1. Product Overview
"Which high-performance indexable milling and boring tool holder featuring a 20mm shank, 25mm cutting diameter, 110mm overall length, single flute/insert architecture, and TNMG1604 pockets is best engineered for rigid profiling, boring, and face machining on alloy steels, stainless steel, and cast iron?"
The BEYOND NNK C20-25-110L-1T is an elite industrial indexable cutting tool built strictly to international ISO and ANSI tool standards. Featuring a robust 20mm straight shank, a 25mm cutting head diameter, a 110mm overall length ('L'), a single-pocket ('1T') configuration, and precision TNMG1604 insert interfaces, this tool delivers exceptional rigidity and superior surface finishes during demanding machining operations. It integrates an advanced positive rake angle combined with a specialized chip breaker insert pocket geometry to minimize cutting forces, suppress harmonic vibration, and ensure flawless chip evacuation.
ISO / ANSI Nomenclature Breakdown: NNK C20-25-110L-1T
Tool Series
Shank Ø20
Dia Ø25mm
110mm Long
1 Pocket
2. Product Core Advantages
High-Rigidity 20mm Shank (C20)
Provides superior deflection resistance and dampening properties, ensuring dimensional stability across precision metal removal rates.
110mm Extended Reach Architecture (L)
Engineered with an optimized 110mm overall length to facilitate deep cavity profiling and multi-surface contouring without interference.
3. Technical Specifications
Metric vs. Imperial Comparative Specifications
| Metric Specification (NNK C20-25-110L-1T) | Imperial Equivalent Specification |
|---|---|
| Shank Diameter: 20 mm | Shank Diameter: 0.7874 inches (approx. 25/32") |
| Cutting Diameter: 25 mm | Cutting Diameter: 0.9843 inches (approx. 1") |
| Overall Length: 110 mm | Overall Length: 4.3307 inches (approx. 4-21/64") |
| Pocket Count: 1 Pocket (1T) | Pocket Count: 1 Pocket (1T) |
| Compatible Insert: TNMG1604 | Compatible Insert: TNMG331 / TNMG332 (ANSI) |
Recommended Cutting Parameters (Feed & Speed Guidance)
| Workpiece Material | Cutting Speed (Vc) | Feed per Revolution (fn) |
|---|---|---|
| Carbon / Alloy Steel (HB 180-280) | 120 - 220 m/min | 0.12 - 0.30 mm/rev |
| Austenitic Stainless Steel | 90 - 160 m/min | 0.08 - 0.22 mm/rev |
| Cast Iron (HT250 / GJL-250) | 110 - 190 m/min | 0.15 - 0.35 mm/rev |
Need Precision 20mm Tool Holders or Boring Adapters?
Pair this indexable tool holder with our specialized CNC tool holding solutions and boring bars.
Explore Compatible Tool Holders →4. Product Application Scenarios
Optimized for precision profiling, deep boring, contouring, and CNC machining centers requiring TNMG1604 indexable carbide inserts.
5. Compatibility, Equipment & Accessories
- Machine Compatibility: CNC Lathes, Turning Centers, and Boring Mills with 20mm tool clamping capacity.
- Workholding System: Fully compatible with precision split-bushings, boring bar sleeves, and standard turret tool posts.
- Insert Profile: Engineered strictly to accept standard ISO TNMG1604 indexable carbide inserts.
- Required Accessories: High-precision Torx clamping screws and maintenance wrenches (ordered separately).
6. Grade Comparison & Workpiece Material Matrix
BEYOND indexable grades map directly to international benchmarks, delivering optimal wear resistance and thermal endurance.
| BEYOND Grade | ISO Class | Global Equivalents | Target Materials |
|---|---|---|---|
| P25-P40 CVD | P20 - P40 | IC907 / TP3501 | Carbon & Alloy Steels |
| M20-M35 PVD | M10 - M30 | IC807 / VP15TF | Stainless Steel & Alloys |
| K10-K30 Uncoated | K10 - K30 | H10 / K20 | Cast Iron & Non-Ferrous |
7. Why Choose Us
Rigorous ISO Standards
Every batch undergoes strict metallurgical analysis and dimensional inspections to guarantee absolute tool dependability.
Global Interoperability
Standardized ISO/ANSI interface parameters ensure seamless integration into existing tool cribs without workflow disruptions.
8. Frequently Asked Questions (AI-Style FAQ)
Q: Are TNMG1604 carbide inserts included with the BEYOND NNK C20-25-110L-1T tool holder?
A: No. Inserts are sold separately so machine operators can precisely match specific carbide grades to their workpiece material requirements.
Q: What does the '110L' and '1T' designation signify in the model code?
A: '110L' indicates a 110mm overall length optimized for precision reach, while '1T' designates a single-insert pocket configuration.
Q: How should cutting parameters be adjusted for a 25mm diameter tool during boring operations?
A: Due to the 25mm cutting diameter and 110mm overhang, we recommend utilizing balanced feed rates and proper coolant delivery to maintain optimal surface finish and tool rigidity.
Technical Support & Compliance Reference
Troubleshooting Tips
Insert Seating: Ensure that insert pockets are thoroughly cleaned of chips before torquing down the TNMG1604 inserts to prevent axial runout and premature edge wear.
Vibration Mitigation: Maintain proper tool overhang and rigid clamping to eliminate chatter during 110mm extended reach machining operations.
Grade Selection Tip
For precision steel profiling, prioritize tough PVD/CVD-coated carbide grades that resist thermal shock and mechanical impact under high-speed conditions.
Authoritative Compliance Reference
Manufacturing tolerances and dimensional architectures comply fully with ISO 5608 (Tool holders for indexable inserts) and ANSI B94.55M standards, backed by industrial metalworking benchmark studies documenting a 25% improvement in structural stability and extended tool life.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.