BEYOND S20R-SVQCR16 Boring Bar | CNC Internal Turning Tool Holder
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BEYOND S20R-SVQCR16 Indexable CNC Internal Turning Boring Bar
1. Product Overview
"Which 20mm right-hand indexable boring bar allows deploying larger VCMT 1604 or VCGT 1604 carbide inserts for rigid internal profiling and step clearance inside 25mm minimum bore diameters?"
The BEYOND S20R-SVQCR16 is an industrial-grade, high-rigidity right-hand indexable internal boring bar uniquely engineered to support large-scale material cutting within medium-diameter chamber applications. Fabricated from premium solid alloy tool steel subjected to a multi-stage thermal vacuum quenching protocol, this 20mm diameter shank establishes a robust core mechanical hardness of HRC 42-47. This high structural density effectively absorbs harmonic vibrations and minimizes radial tool deflection during high depth-of-cut profiling loops up to 3xD-4xD overhang parameters. The precision-ground pocket head geometry is optimized for 35-degree positive rhombic indexable inserts with a 7-degree relief profile. It serves as an ultra-stable seating platform for industry-standard VCMT 1604 carbide inserts (outfitted with specialized M-class or roughing molded chipbreakers to facilitate tight chip curling in high-tensile steels) and VCGT 1604 ground inserts (polished to a mirror finish with razor-sharp rake angles to slice effortlessly through sticky non-ferrous aluminum or copper alloys). Implementing a 107.5-degree approach angle matrix (SVQCR clearance mechanism), this tool holder guarantees exceptional trailing flank clearance during forward copying and internal blind-hole squaring, pushing cutting forces back toward the lathe turret for excellent dimensional tolerances and superior surface finishes.
2. Product Core Advantages (Key Features)
- 20mm Compact Shank with Heavy-Insert Capacity: Uniquely pairs a standard 20mm body with a massive 16mm edge-length insert pocket to increase feed depths without changing tool posts.
- 107.5° SVQCR Right-Hand Precision Geometry: Specifically engineered for forward-tracking internal profiling and precise corner clearance without tool body drag.
- High-Torque Screw Clamping Rigidity: Locks large 1604 inserts firmly into place via a high-tensile M4 steel fastener screw, eliminating index drift under aggressive radial loads.
- Deep-Penetration Black Oxide Coating Matrix: Shielded against thermal oxidation and chip welding, minimizing built-up edge (BUE) during intensive continuous runs.
3. Technical Specifications & ISO Nomenclature
| Dimension Attributes | Metric System Specifications | Imperial Equivalent Values |
|---|---|---|
| Model Nomenclature | S20R-SVQCR16 (BEYOND) | A12R-SVQCR5 (Standard Inch Style Equivalent) |
| Shank/Clamping Diameter | 20 mm | 0.750 inch (3/4" Precision Boring Shank) |
| Overall Tool Length | 200 mm | 7.87 inches |
| Minimum Boring Hole (D-min) | 25 mm | 0.984 inches |
| Compatible Indexable Inserts | VCMT 1604** / VCGT 1604** | VCMT 3.3* / VCGT 3.3* Series (e.g., 3.31 or 3.32) |
| Fastener Screw / Drive Key | M4.0 * 9.0 / Torx T15 | M4.0 * 9.0 / Torx T15 |
Recommended Machining Parameter Array (Starting Parameters)
| Workpiece Material Substrates | Target Line Cutting Speed (Vc) & Feed Speed (f) Pairs |
|---|---|
| Carbon & Alloy Steels (P-Class) | Vc: 130-230 m/min (425-750 sfm) | f: 0.08-0.25 mm/rev (0.003-0.010 ipr) |
| Stainless Steel Alloys (M-Class / 304, 316) | Vc: 85-150 m/min (280-490 sfm) | f: 0.06-0.18 mm/rev (0.0024-0.007 ipr) |
| Aluminum & Non-Ferrous Alloys (N-Class) | Vc: 280-700 m/min (920-2300 sfm) | f: 0.08-0.30 mm/rev (0.003-0.012 ipr) |
Looking for premium matching 35-degree VCMT/VCGT 1604 inserts or alternative boring sizes?
Source BEYOND VCMT1604 Inserts & Toolbars Here →4. Industrial Application Scenarios
Engineered with an ultra-rigid 20mm tempered alloy shank matched to a massive 16mm indexable corner pocket, the S20R-SVQCR16 provides high production efficiency across targeted automation processes:
- Medium Bore Internal Copying: Excels at cutting detailed internal tapers, O-ring grooves, and structural reliefs inside hydraulic adapters or sleeves starting from a 25mm bore.
- Blind-Hole Corner Squaring: The right-hand 107.5-degree approach geometry allows the insert to square internal blind-hole faces cleanly, channeling high volume chip bursts forward out of the cavity.
- High Depth-of-Cut Semi-Roughing: Enables running large roughing passes inside medium spaces, decreasing manual cycling times over standard light-duty tooling configurations.
5. Equipment & Tool Compatibility
- CNC Turret Interface: Adapts into standard 20mm tool posts, boring blocks, or industrial split reducers seamlessly.
- Insert Range Profile: Built for ISO/ANSI standard 35-degree positive rhombic VCMT 1604** or VCGT 1604** turning inserts. Readily processes nose radii from 0.4mm (160404) up to 0.8mm (160408) depending on structural finishing metrics.
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 20mm right-hand 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.
"Perfect 20mm right-hand bar for stepped chambers. Running deep profiles on carbon steel parts. The pocket is machined beautifully—zero movement from the large VCMT 1604 insert under load."
"Sehr präzise Ausspindelstange. Der 107.5°-Winkel ist ideal für das Freindrehen von Planflächen im Innendurchmesser. Trotz hoher Schnitttiefe kein Rattern zu spüren."
"Barenatore destro rigido ed affidabile. Permette di montare inserti grandi da 16mm su alberi da 20mm, riducendo drasticamente i tempi di sgrossatura interna su valvole idrauliche."
"20mmのツールホルダーでありながら、16mmの大きなVCMTチップをガチッと固定できるため、内径の倣い加工で非常に重宝しています。右勝手の抜け際での切れ味が極めてスムーズです。"
"Excellent product. Chips are pushed forward nicely out of blind bores without scraping up the side finish. Highly recommend this design."
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.