BEYOND S16Q-SVUCL11 Boring Bar | CNC Internal Turning Tool Holder
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BEYOND S16Q-SVUCL11 Indexable CNC Internal Turning Boring Bar
1. Product Overview
"Which compact 16mm left-hand indexable boring bar balances slim clearance with high-rigidity chatter suppression for internal back-boring using positive VCMT 1103 or VCGT 1103 inserts?"
The BEYOND S16Q-SVUCL11 is an engineered industrial-grade left-hand indexable internal boring bar designed for small-clearance copy turning, precision deep-hole semi-finishing, and stable internal profiling. Manufactured from premium solid alloy steel that undergoes multi-stage thermal hardening to reach a core toughness of HRC 42-47, this 16mm diameter bar offers superior resistance against cutting deflection and harmonic chatter at overhang ratios up to 4xD. It is meticulously machined to clamp standard 35-degree rhombic indexable inserts featuring a 7-degree positive relief angle. This makes it an ideal match for the standard VCMT 1103 series (optimized with strong M-class chipbreakers for general steel chip control) and the ultra-sharp, mirror-polished VCGT 1103 series (featuring high-rake ground chipbreaker geometries to prevent chip nesting in non-ferrous aluminum alloys). Utilizing a 93-degree lead approach angle (SVUCL design), it guarantees an efficient backward chip evacuation path during left-hand operations, preventing catastrophic chip re-cutting on delicate internal bore surfaces. Backed by a secure high-tensile screw-lock system, it ensures exceptional insert indexing repeatability across intense CNC lathe production cycles.
2. Product Core Advantages (Key Features)
- Optimized 16mm Heat-Treated Shank: Quenched alloy construction delivers high toughness, minimizing structural deflection inside tight 20mm holes.
- 93° SVUCL Lead Angle Configuration: Tailored for left-hand internal back-boring, taper turning, and profiling without tool heel rubbing.
- Precision-Milled Insert Seating Pocket: Processed on 5-axis CNC machining centers to ensure a perfect insert fit, protecting the 11mm cutting edge from micro-movements.
- Industrial Black Oxide Finish: Enhances chip flow slickness, provides excellent corrosion resistance, and extends the operational life of the holder.
3. Technical Specifications & ISO Nomenclature
| Dimension Attributes | Metric System Specifications | Imperial Equivalent Values |
|---|---|---|
| Model Nomenclature | S16Q-SVUCL11 (BEYOND) | A10Q-SVUCL3.5 (Standard Inch Style Equivalent) |
| Shank/Clamping Diameter | 16 mm | 0.625 inch (5/8" Precision Boring Shank) |
| Overall Tool Length | 180 mm | 7.09 inches |
| Minimum Boring Hole (D-min) | 20 mm | 0.787 inches |
| Compatible Indexable Inserts | VCMT 1103** / VCGT 1103** | VCMT 2.2* / VCGT 2.2* Series (e.g., 2.21 or 2.22) |
| 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: 120-220 m/min (390-720 sfm) | f: 0.05-0.15 mm/rev (0.002-0.006 ipr) |
| Stainless Steel Alloys (M-Class / 304, 316) | Vc: 80-140 m/min (260-460 sfm) | f: 0.04-0.10 mm/rev (0.0016-0.004 ipr) |
| Aluminum & Non-Ferrous Alloys (N-Class) | Vc: 250-600 m/min (820-1960 sfm) | f: 0.05-0.18 mm/rev (0.002-0.007 ipr) |
Need premium matching 35-degree VCMT/VCGT inserts or alternative boring sizes?
Source BEYOND VCMT1103 Inserts & Toolbars Here →4. Industrial Application Scenarios
Engineered with a balanced 16mm steel body and a highly detailed 11mm insert seat pocket, the S16Q-SVUCL11 excels in precision internal processing cycles on automated CNC equipment:
- Internal Shoulder Back-Boring: Allows efficient reversal toolpaths to clear back-faces and internal geometries where a left-hand orientation is required.
- Precision Profiling & Contouring: Replicates intricate internal curves and complex profiles with high accuracy, minimizing deflection under axial loads.
- Semi-Finish Boring: Ideal for machining clean internal cylinders out of cast iron, steel housings, or alloyed blocks prior to final honing.
5. Equipment & Tool Compatibility
- CNC Lathe Interface Matching: Fits standard 16mm internal diameter boring bar holders, split bushings, or standard turret clamping systems.
- Insert Compatibility Matrix: Accommodates standard ISO/ANSI 35-degree positive rhombic VCMT 1103** or VCGT 1103** inserts. Handles corner radii from 0.2mm (110302) for super fine finishing up to 0.4mm (110304) for general purpose cutting loops.
6. BEYOND Proprietary Grade Optimization Matrix
Select the correct specialized BEYOND insert substrate grade to maximize chipbreaker 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 16mm 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 16mm shank for internal back-boring. We swapped a competitor bar out for this S16Q-SVUCL11 and our surface roughness dropped drastically. Zero vibration inside our tight 21mm bores."
"Sehr präziser Plattensitz für VCMT 1103. Keine Mikrobewegungen der Wendeplatte bei unterbrochenem Schnitt. Perfekt für kleine Bohrungen."
"Ottimo barenatore sinistro da 16mm. Lo usiamo su torni CNC per profilatura interna. Buona evacuazione dei trucioli nonostante lo spazio ristretto."
"16mmの鋼シャンクですが剛性が非常に高く、VCMT1103チップとの組み合わせで内径切削が安定します。ネジの精度も高く、チップ交換時のセンター高さのズレがありません。"
"The compact 16mm diameter fits perfectly for our small custom component line. Highly repeatable indexing."
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.