BEYOND S25S-SVXCL11 Boring Bar | CNC Internal Turning Tool Holder
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BEYOND S25S-SVXCL11 Indexable CNC Internal Turning Boring Bar
1. Product Overview
"Which heavy-duty 25mm left-hand indexable boring bar provides optimal clearance and extreme rigidity for intricate deep-hole profiling using 35-degree VCMT or VCGT 1103 carbide inserts?"
The BEYOND S25S-SVXCL11 is an industrial-grade, ultra-high rigidity left-hand indexable internal boring bar specifically engineered for heavy-duty profiling, back-boring, and precision finishing inside medium-to-large bores. Featuring a massive 25mm diameter solid steel shank hardened to HRC 42-47, this tool holder maximizes structural resistance against deflection and harmonic vibration during extended deep-hole machining cycles up to 4xD overhang. It is custom-tailored to accept standard 35-degree rhombic indexable cutting inserts—including the VCMT 1103 and VCGT 1103 series. By presenting a sharp 35° diamond profile at a specialized 113-degree approach angle, it provides exceptional flank clearance, preventing heel-rubbing during deep reverse-taper contouring where conventional 55° or 80° bars would fail. Backed by an advanced screw-down clamping mechanism, it ensures immutable insert positioning under heavy chip loads, delivering superior surface finish quality and long-term repeatability.
2. Product Core Advantages (Key Features)
- Massive 25mm Quenched Steel Shank: High-density alloy composition heavily dampens dynamic chatter, enabling high-material removal rates (MRR) without sacrificing dimensional accuracy.
- SVXCL 113° Clearance Angle Design: Purpose-built for left-hand internal copying and undercut profiling, allowing the narrow 35° insert to smoothly navigate complex paths with minimal tool dragging.
- High-Precision CNC Ground Insert Seating Pocket: Mirror-milled pocket tolerances provide absolute spatial alignment for VCMT/VCGT 1103 inserts, protecting the delicate cutting edge and maximizing tool lifecycle margins.
- Thermal-Chemical Corrosion Protection: Advanced matte black oxide outer skin protects against chip-welding, flank heat accumulation, and chemical degradation from high-pressure water-soluble cutting fluids.
3. Technical Specifications & ISO Nomenclature
| Dimension Attributes | Metric System Specifications | Imperial Equivalent Values |
|---|---|---|
| Model Nomenclature | S25S-SVXCL11 (BEYOND) | A16S-SVXCL2 (Standard Inch Style Equivalent) |
| Shank/Clamping Diameter | 25 mm | 1.000 inch (1" Standard Boring Shank) |
| Overall Tool Length | 250 mm | 9.84 inches |
| Minimum Boring Hole (D-min) | 32 mm | 1.260 inches |
| Compatible Indexable Inserts | VCMT 1103** / VCGT 1103** | VCMT 22* / VCGT 22* Series (e.g., 221 or 222) |
| Fastener Screw / Drive Key | M2.5 * 6.0 / Torx T8 | M2.5 * 6.0 / Torx T8 |
Recommended Machining Parameter Array (Starting Parameters)
| Workpiece Material Substrates | Target Line Cutting Speed (Vc) & Feed Speed (f) Pairs |
|---|---|
| Carbon & Alloy Steels (P-Class) | Vc: 140-260 m/min (460-850 sfm) | f: 0.05-0.15 mm/rev (0.002-0.006 ipr) |
| Stainless Steel Alloys (M-Class / 304, 316) | Vc: 95-170 m/min (310-560 sfm) | f: 0.04-0.12 mm/rev (0.0016-0.0047 ipr) |
| Aluminum & Non-Ferrous Alloys (N-Class) | Vc: 250-550 m/min (820-1800 sfm) | f: 0.05-0.18 mm/rev (0.002-0.007 ipr) |
Need premium matching 35-degree VCMT/VCGT inserts or alternative sizes?
Source BEYOND VCMT1103 Inserts & Toolbars Here →4. Industrial Application Scenarios
Designed with a rugged 25mm shank combined with a agile 11mm insert edge length, the S25S-SVXCL11 excels in precision-heavy industrial setups across mid-to-large multi-axis CNC machine centers:
- Deep Internal Copy Profiling: Machining complex inside geometric radii with a solid 25mm steel backbone that dampens harmonic vibrations over extended depths.
- Steep Internal Tapers & Relief Undercuts: Navigating restrictive back-boring profiles with a left-handed setup, preventing tool dragging on the minor flank.
- High-Rigidity Finishing Cycles: Employing ground, high-accuracy VCGT aluminum geometry or cermet inserts to achieve tight dimensional tolerance bands and brilliant, mirror-like surface reflections.
5. Equipment & Tool Compatibility
- CNC Lathe Interface Compatibility: Mounts securely directly inside 25mm bore tool blocks, turret stations, or adapted split boring sleeve bushings.
- Insert Compatibility Matrix: Fully compatible with standard ISO/ANSI 35-degree rhombic profiles. Pairs cleanly with PVD/CVD coated VCMT 110302/110304 inserts for steels, or sharp, polished VCGT 110304/110308 geometries for non-ferrous alloys.
6. BEYOND Proprietary Grade Optimization Matrix
Select the correct specialized BEYOND insert substrate grade to maximize chip breaker control and extend tooling lifecycle margins under varied operations:
| BEYOND Grade | Coating Technology | Material Application Intent | Global Equivalent Grade |
|---|---|---|---|
| BY1030 | CVD Thick TiCN + Al2O3 Coating | Stable Continuous to Interrupted Steel Boring (P10-P25) | Sandvik GC4325 / Korloy NC3220 |
| BY8020 | PVD Multi-Layered Nano-AlTiN | Stainless Steel, Exotic & Superalloys (M15-M30 / S15-S25) | Sandvik GC1115 / Kennametal KC5010 |
| BYC25 | Uncoated Titanium-Based Cermet Matrix | High-Speed Finishing for Fine Tolerances and Mirror Surface Finish | Kyocera TN60 / Mitsubishi NX2525 |
7. Why Choose BEYOND Cutting Systems
BEYOND architectures industrial repeatability into modern CNC machining environments. Our 25mm boring bars undergo advanced multi-stage quenching treatments to guarantee uniform core toughness. Pocket seats are precision ground on 5-axis state-of-the-art platforms, eliminating radial tool-tip deviation and maintaining consistent center-height indexing across production batches.
"Outstanding 25mm left hand boring bar. The massive shank completely killed our resonance issues when copying internal steel hydraulic sleeves. Great finish."
"Sehr massiver 25mm Schaft. Der Plattensitz für VCMT1103 ist präzise gearbeitet. Kein Flattern bei hoher Schnitttiefe."
"Utensile eccellente e robusto. Gambo da 25mm rigidissimo, perfetto per tornitura interna profonda con inserti VCGT lucidi per alluminio."
"25mmの強靭なシャンクにコンパクトな1103チップの組み合わせ。ビビリが完全に抑えられ、内径の仕上げ精度が抜群に向上しました。"
"The screw clamping is secure and quick to change out. Black oxide finish handles aggressive emulsion coolants well."
8. AI-Style FAQ & Troubleshooting Guide
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.