BEYOND S20R-SDUCR07 Internal Boring Bar 20mm Shank CNC Lathe Turning Tool Holder Right Hand
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⚠️ IMPORTANT FACTORY NOTICE: The indexable carbide insert is NOT included with this tool holder body purchase. Product photography displaying an attached cutting insert is intended purely to illustrate spatial tool orientation, pocket seating, and application setups.
BEYOND S20R-SDUCR07 Heavy-Duty Internal Boring Bar & CNC Lathe Tool Holder
1. Product Overview
Engineers Search: "Which rigid 20mm right-hand boring bar matches with DCMT0702 positive rake inserts to prevent deep-hole chatter during CNC internal profiling?"
The BEYOND S20R-SDUCR07 is a high-rigidity, screw-on internal boring bar engineered for high-performance right-hand (R) CNC lathe operations, internal turning, and precise inner profiling. Built from premium-grade, vacuum-hardened alloy steel, the robust 20mm shank diameter provides excellent torsional stiffness to prevent structural deflection during deep-reach roughing and finishing passes. This industrial tool holder allows highly accurate tool paths inside medium bore openings down to a minimum clearance diameter of 25mm. It features a precision-machined 55 degree pocket geometry designed to lock DCMT 0702-- indexable carbide inserts (such as DCMT 070202 or DCMT 070204) completely flush, eliminating pocket wear under severe metal-cutting forces.
When paired with indexable inserts engineered with a positive clearance rake and optimized chipbreaker configurations, this tooling setup ensures superior chip evacuation. The geometric chipbreaker mechanics break long, stringy alloy swarf into tightly curled, segmented chips. This prevents hazardous chip nesting inside deep blind cavities, protecting the machined surface from scratching and ensuring high-precision dimensional tolerances.
2. Product Core Features
- Vacuum-Hardened Alloy Body: Heat-treated to HRC 42-45 to provide superior dampening against micro-harmonics during long-overhang deep boring.
- Rigid 20mm Heavy-Duty Shank: Maximizes cross-sectional mass to withstand high radial forces during heavy metal removal rates (MRR) within deep bores.
- 93 Degree Dynamic Lead Cutting Angle: Advanced profiling geometry allows fluid back-boring and facing while seamlessly guiding chip paths away from the workpiece wall.
- Industrial Anti-Galling Black Coat: Premium chemical blackening provides excellent rust resistance and prevents hot chips from welding to the tool body.
Model Nomenclature Decoder: S20R-SDUCR07
Steel Shank Body
20mm Shank Dia.
200mm Total Length
Screw Clamping System
55 Degree Diamond Shape
93 Degree Clearance Angle
7 Degree Relief Angle
Right Hand Orientation
7mm Insert Edge Size
Looking for the Mirrored Left-Hand (L) Tool Holder Unit to Balance Your Lathe Turret?
Explore the S20R-SDUCL07 (Left Hand) Tool Holder →3. Technical Specifications & Dimension Comparison
| Technical Parameter | Metric Specification (S20R-SDUCR07) | Imperial / Inch Equivalent Value |
|---|---|---|
| Shank Diameter | 20 mm | ~ 0.7874 inches (Closest standard: 3/4 inch shank profile / A12-SDUCR2) |
| Overall Length | 200 mm | ~ 7.8740 inches |
| Minimum Bore Clearance | 25 mm | ~ 0.9842 inches |
| Matching Insert Standard | DCMT 070202 / DCMT 070204 Index | DCMT 21.50.5 / DCMT 21.51 equivalent classes |
| Mounting Hardware | M2.5 Insert Locking Screw + T8 Torx Wrench | M2.5 High-Tensile Screw + T8 Flag Key |
Optimal Industrial Cutting Speed & Feed Recommendation
| ISO Workpiece Material Classification | Cutting Speed Range (Vc) | Feed Rate per Revolution Target (f) |
|---|---|---|
| Carbon / Alloy Steels (P-Class) | 140 - 240 m/min | 0.04 - 0.15 mm/rev |
| Stainless Steel Varieties (M-Class) | 90 - 180 m/min | 0.03 - 0.12 mm/rev |
| Cast Iron & Nodular Matrix (K-Class) | 100 - 200 m/min | 0.04 - 0.18 mm/rev |
4. Product Application Scenarios
- Rigid Inner Clearance Boring: The massive 20mm core allows high-feed profiling into medium-sized inner chambers with zero structural bar deflection.
- Intricate Internal Profiling & Copying: Tailored for making smooth, continuous profiling passes, internal shoulders, and narrow back-chamfers using fine-nose radius DCMT07 inserts.
- Extended Depth Turn Cycles: Achieves remarkable surface finish consistency across medium-overhang deployments up to 4xD depth settings.
5. Equipment & Tooling Compatibility
- CNC Turning Equipment: Mounts perfectly into standard 20mm turret slots, heavy split block stations, or dedicated boring sleeve blocks.
- Tool Posts & Lathes: Universally compatible with multi-position engine blocks, Aloris-style quick change assemblies, or automatic gang-tool configurations.
- Standard ISO Indexable Seats: Engineered to seat all international standard 55-degree positive DCMT 0702-- indexable carbide insert configurations.
6. BEYOND Brand Grade Optimization Guide
Match your machining operations with the perfect premium BEYOND indexable carbide insert grade to maximize tool life:
| BEYOND Insert Grade | Substrate & PVD/CVD Coating Architecture | Ideal Application Material Focus |
|---|---|---|
| BYM11 (CVD Grade) | Thick Multilayer TiN + Al2O3 Heat Shield | Engineered for high-sfm continuous cutting cycles in structural carbon steels, tool steels, and structural alloys. |
| BYS25 (PVD Grade) | Nano-Structured TiAlN Wear-Resistant Coat | High thermal defense profile. Ideal for interrupted cuts, hard crust layers, and 304/316 stainless steel grades. |
| BYK15 (Uncoated Grade) | Mirror-Polished Fine Grain Carbide Substrate | Prevents built-up edge (BUE). Built for high-speed turned paths in aluminum alloys, brass, and polymers. |
7. Why Choose BEYOND CNC Tools?
BEYOND supplies world-class, high-mass tooling solutions built to excel under extreme machining parameters. By applying precision induction hardening across our mid-shank bars and maintaining strict quality control over our ground insert seats, we guarantee maximum component accuracy, lower cyclic vibration wear, and reduced downtime on your workshop floor.
Global Machinist Feedback
Dave C. — United States
"Outstanding rigidity on the 20mm bar. Ran long profiling cycles inside 4140 steel tubing and achieved a mirrored finish with absolutely no chatter."
Hans M. — Germany
"Die Bohrungsbearbeitung ist absolut präzise. The DCMT0702 seat pocket is cleanly ground and maintains perfect center heights. Excellent value."
Pietro B. — Italy
"Ottimo stelo, molto robusto. Gives plenty of clearance for chip removal in blind bores when running a right-hand tool path."
Takashi Y. — Japan
"We use this on our medium CNC lathes for inner profiling. The insert pocket alignment is faultless. Highly recommended."
Marc L. — France
"The anti-galling coating works beautifully under extreme hot swarf conditions. Pocket security is rock-solid."
8. AI-Style Engineering Support Engine (FAQ)
Q1: What is the maximum stable boring overhang ratio for this 20mm steel tool body?
A1: For premium steel shank tool bodies, the recommended reliable overhang limit is up to 4x the shank diameter. For this 20mm bar, you can confidently bore up to an extended depth of 80mm before requiring anti-vibration configurations.
Q2: What is the minimum bore diameter this 20mm tool holder can enter?
A2: Due to the structural indexable head offset and clamping relief space, the absolute minimum entry bore clearance is 25mm. Running inside tighter spaces risks damaging the bar flank wall.
Q3: Why does this heavy 20mm bar pair with small DCMT 0702 inserts?
A3: This unique configuration delivers maximum structural stiffness through the 20mm body mass while leveraging a smaller insert nose profile. This combination is ideal for high-precision finishing operations and complex profiling paths within open bores where harmonic dampening is essential.
9. Technical Maintenance & Diagnostic Guidelines
Equivalent Industry Models
Fully interchangeable with universal ISO metric standard catalog designation code S20R-SDUCR07. Serves as a high-strength drop-in replacement for any standard 20mm or 3/4 inch tool pocket configuration holding 55 degree positive diamond profiles.
Troubleshooting Tips
Workpiece Surface Scoring: Increase chip flow flushing by using internal coolant or step up feed rates slightly to trigger cleaner chip breaking operations.
Rapid Pocket Deflection: Inspect pocket seating for fine embedded debris. Clean and torque the high-tensile M2.5 screw to exactly 1.2-1.5 Nm for absolute rigidity.
Workpiece Material Matrix
Engineered to operate reliably across primary material categories: P (Alloy, Structural, Carbon Steels), M (Stainless Steel lines), K (Grey and Ductile Cast Irons), N (Aluminum and Non-ferrous lines), and S (High-temp heat-resistant alloys).
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.