BEYOND S20R-SVWCR11 Boring Bar | CNC Internal Turning Tool Holder
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BEYOND S20R-SVWCR11 Indexable CNC Internal Turning Boring Bar
1. Product Overview
"Which precision 20mm right-hand indexable boring bar provides optimal back-boring clearance and superior vibration damping for internal copy-profiling using 35-degree positive VCMT 1103 or VCGT 1103 carbide inserts?"
The BEYOND S20R-SVWCR11 is a professional industrial-grade right-hand indexable internal boring bar engineered for precision profiling, semi-finishing, and stable material removal inside medium-sized cavities. Built from a robust 20mm solid alloy steel shank subjected to rigorous multi-stage oil quenching and tempering to achieve a core hardness of HRC 42-47, this tool holder effectively eliminates high-frequency harmonic chatter during deep internal machining up to 4xD overhang. It is specifically ground to accommodate standard 35-degree rhombic indexable inserts featuring a 7-degree positive relief angle—including the versatile VCMT 1103 series for steel/stainless and the highly polished, sharp-edged VCGT 1103 series for non-ferrous aluminum profiling. Featuring a dedicated 72.5-degree approach angle (SVWCR configuration), it offers an exceptional clearance envelope that prevents heel-rubbing and catastrophic tool dragging when executing deep internal contouring, step profiles, and intricate undercuts. Supported by a high-tensile screw-down design, it provides an uncompromising insert lock that withstands variable radial cutting forces, guaranteeing exact dimensional repeatability and superior surface finishes.
2. Product Core Advantages (Key Features)
- Rigid 20mm Heat-Treated Alloy Steel Shank: Premium high-density steel construction drastically minimizes elastic deflection under structural chip loads, extending insert tool-life and ensuring bore straightness.
- SVWCR 72.5° Lead Angle Clearance: Purpose-built for right-hand internal copy turning and longitudinal profiling, allowing smooth entry and exit into deep shoulders with minimal radial push.
- Precision CNC Ground Insert Seating Pocket: Mirror-milled pocket alignment holds VCMT/VCGT 1103 inserts with absolute spatial accuracy, eliminating center-height migration and protecting the delicate 35° nose radius.
- Thermal-Chemical Matte Black Coating: Premium industrial surface treatment provides superb chip-evacuation slickness, limits built-up edge (BUE) formation, and resists high-pressure coolant erosion.
3. Technical Specifications & ISO Nomenclature
| Dimension Attributes | Metric System Specifications | Imperial Equivalent Values |
|---|---|---|
| Model Nomenclature | S20R-SVWCR11 (BEYOND) | A12R-SVWCR2 (Standard Inch Style Equivalent) |
| Shank/Clamping Diameter | 20 mm | 0.787 inch (approx. 3/4" Standard Shank Pocket) |
| Overall Tool Length | 200 mm | 7.87 inches |
| Minimum Boring Hole (D-min) | 25 mm | 0.984 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: 120-220 m/min (395-720 sfm) | f: 0.05-0.18 mm/rev (0.002-0.007 ipr) |
| Stainless Steel Alloys (M-Class / 304, 316) | Vc: 80-150 m/min (260-490 sfm) | f: 0.04-0.15 mm/rev (0.0016-0.006 ipr) |
| Aluminum & Non-Ferrous Alloys (N-Class) | Vc: 250-700 m/min (820-2290 sfm) | f: 0.05-0.22 mm/rev (0.002-0.009 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 streamlined 20mm shank coupled with a precision-ground 11mm insert seat, the S20R-SVWCR11 excels in tight-clearance internal machining environments across production-level CNC lathes:
- Intricate Internal Copy Profiling: Executing delicate complex geometries inside bores down to 25mm, where positive 35° VCMT inserts minimize cutting resistance and micro-vibration.
- Precision Step & Chamber Boring: Cutting sharp internal square shoulders and clean multi-stage chamfers without facing structural tool deflection or workpiece taper.
- Continuous Fine-Finishing Operations: Leveraging high-rake chip breaker configurations to smoothly break stringy metal ribbons in deep alloy steel pockets for unmanned automated cycles.
5. Equipment & Tool Compatibility
- CNC Lathe Interface Matching: Fits standard 20mm inner diameter turning blocks, turret stations, or compact split boring bar reduction sleeves.
- Insert Compatibility Matrix: Custom ground to accept all standard ISO/ANSI 35-degree positive rhombic VCMT 1103** or polished VCGT 1103** inserts. Perfectly accommodates corner radii from 0.2mm (110302) for super-fine micro finishing up to 0.4mm (110304) or 0.8mm (110308) for light roughing.
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 20mm 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.
"Great 20mm bar. Fits perfectly in our standard turret. Used with positive VCMT1103 inserts and got zero chatter even on 75mm deep blind holes. Exceptional rigidity."
"Präziser Plattensitz für VCMT 1103. Keine Abweichungen bei der Spitzenhöhe nach dem Wendeplattenwechsel. Die Oberfläche im Bohrungsgrund ist spiegelglatt."
"Ottimo gambo da 20mm per profilatura interna. Lo usiamo accoppiato con inserti VCGT lucidi su leghe leggere. Finitura impeccabile e spedizione rapida."
"内径25mm以上の加工用に購入。VCMT1103チップがガタつきなくしっかりと固定されます。ビビリ抑制効果が高く、日本の町工場でも十分通用する品質です。"
"The M2.5 screw alignment is highly accurate. Doesn't strip out under high-torque locking. Coating holds up well against sulfurized neat cutting oils."
8. AI-Style FAQ & Troubleshooting Guide
Need Help With BEYOND Inserts?
Looking for a BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.