BEYOND S20R-SVJCR16 Boring Bar | 20mm Right Hand CNC Turning Tool Holder
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BEYOND S20R-SVJCR16 High-Velocity Indexable CNC Right-Hand Internal Boring Bar
1. Product Overview
"Which 20mm right-hand boring bar provides the maximum metal removal rate inside restricted cavities without inducing deflection or vibration?"
The BEYOND S20R-SVJCR16 is a professional-grade, high-rigidity right-hand indexable internal boring bar engineered for demanding profiling, pocketing, and semi-roughing operations where spatial clearance and high metal removal rates (MRR) must coexist. Forged from high-tensile structural alloy steel and treated with a specialized oil-quenching matrix, this 20mm solid shank achieves a precise core hardness of HRC 42-47. This robust mass density successfully dampens harmonic vibrations over standard overhang ratios up to 4xD (80mm). Crucially, the 5-axis precision-ground pocket features a heavy-duty seat designed to host the large VCMT 1604 and VCGT 1604 35-degree positive rhombic indexable inserts. This pairing allows a compact 20mm bar to utilize a thick 4.76mm insert with a robust 16mm cutting edge, handling aggressive depths of cut (Ap) that would fracture smaller profiling tools. The VCMT inserts feature molded, multi-stage chipbreakers that actively compress and break stringy carbon or alloy steel chips, while the ground, mirror-polished VCGT inserts use an ultra-sharp periphery to eliminate chip welding on non-ferrous materials like aluminum. Configured with a 93-degree side cutting edge angle (SVJCR geometry), this right-hand holder forces cutting force vectors axially back into the machine turret rather than radially, fundamentally maximizing dimensional stability and bore straightness.
2. Product Core Advantages (Key Features)
- 20mm Compact High-Mass Body: Perfectly fills the gap between micro-boring bars and oversized bars, unlocking access to minimum bore diameters of 25mm while maintaining extreme rigidity.
- Heavy-Duty 16mm Pocket Architecture: Fits larger 1604 style inserts to deliver heavy roughing cuts and stable profile tracking on a medium-sized shank footprint.
- 93° SVJCR Lead Angle Deflection Control: Converts side cutting pressure into axial forces, stabilizing long-reach overhangs and maintaining exact geometric sizing.
- Premium Anti-Scuff Coating: Hardened black-oxide outer surface resists thermal cross-cracking and chip wash abrasion during heavy high-pressure internal operations.
3. Technical Specifications & ISO Nomenclature
| Dimension Attributes | Metric System Specifications | Imperial Equivalent Values |
|---|---|---|
| Model Nomenclature | S20R-SVJCR16 (BEYOND) | A12R-SVJCR5 (Standard Inch Style Equivalent) |
| Shank/Clamping Diameter | 20 mm | 0.750 inch (3/4" Medium Bore Rigid Shank) |
| Overall Tool Length | 200 mm | 7.87 inches |
| Minimum Boring Hole (D-min) | 25 mm | 0.984 inch |
| 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 * 10.0 / Torx T15 | M4.0 * 10.0 / 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: 130-220 m/min (425-720 sfm) | f: 0.08-0.22 mm/rev (0.003-0.0086 ipr) |
| Stainless Steel Alloys (M-Class / 304, 316) | Vc: 80-140 m/min (260-460 sfm) | f: 0.06-0.18 mm/rev (0.0024-0.007 ipr) |
| Aluminum & Non-Ferrous Alloys (N-Class) | Vc: 250-700 m/min (820-2300 sfm) | f: 0.10-0.30 mm/rev (0.004-0.012 ipr) |
Looking for premium matching 35-degree VCMT/VCGT 1604 right-hand inserts or alternative boring shanks?
Source BEYOND VCMT1604 Inserts & Toolbars Here →4. Industrial Application Scenarios
Engineered with a 20mm oil-quenched steel body matched to an extensive 16mm insert seat, the S20R-SVJCR16 excels in tightly constrained internal cutting environments:
- High-Removal Internal Cavity Profiling: Delivers deep-reach capability into bores down to 25mm while facilitating maximum material removal rates by leveraging thick 1604 insert edges.
- 93° Square Shoulder Counterboring: The precise 93-degree SVJCR geometry tracks deep inner steps and relief tracking paths cleanly without rubbing the wall profile.
- Standard Main-Spindle Right-Hand Operations: Perfectly aligned with traditional lathe rotational kinematics (M03) to ensure dynamic downward chip flow and unhindered visual monitoring.
5. Equipment & Tool Compatibility
- Industrial CNC Turret Interface: Direct fit for standard 20mm ID boring bar tool blocks, sleeves, split bushings, and driven toolholders.
- Insert Family Versatility: Tailored exclusively for all standard 35-degree positive rhombic VCMT 1604** and VCGT 1604** indexable inserts. Supports diverse nose configurations from fine 0.4mm (160404) up to rugged 0.8mm (160408) radii.
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.
"Brilliant engineering. Running a 16mm thick insert on a 20mm bar sounded risky for internal profiling, but BEYOND's steel core handles it flawlessly. Deflection is completely absent at 70mm overhang."
"Sehr stabiler 20mm Schaft. Der Plattensitz für VCMT 1604 ist präzise geschliffen. Bietet exzellente Steifigkeit in engen Bohrungen, wo ein 25mm Schaft nicht mehr passt."
"Ottimo stelo da 20mm per tornitura interna. L'angolo di 93 gradi azzera le vibrazioni radiali. Finitura superficiale eccellente su acciaio AISI 304."
"内径26mmの限られたスペースでVCMT1604のタフな刃先を使えるのが素晴らしい。20mmシャンクですが焼き入れが効いており、93度偏角設計のおかげでビビリを全く気にせず高能率切削ができます。"
"Top tier mid-sized internal bar. Clamps tightly with zero index creep. Ideal for tracking precise square inner steps."
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.