BEYOND S25S-SDUCR11 Internal Boring Bar 25mm Shank CNC Lathe Turning Tool Holder Right Hand
Price shown is a starting point. Contact us for a precise quote based on your requirements.
⚠️ 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 S25S-SDUCR11 Heavy-Duty Internal Boring Bar & CNC Lathe Tool Holder
1. Product Overview
Engineers Search: "Which rigid 25mm right-hand boring bar matches with DCMT11T3 positive rake inserts to prevent deep-hole chatter during CNC internal profiling?"
The BEYOND S25S-SDUCR11 is a premium, screw-on internal boring bar engineered for high-performance right-hand (R) CNC lathe operations, internal turning, and complex inner profiling. Built from premium-grade, vacuum-hardened alloy steel, the robust 25mm shank diameter provides high 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 32mm. It features a precision-machined 55 degree pocket geometry designed to lock DCMT 11T3-- indexable carbide inserts (such as DCMT 11T304 or DCMT 11T308) 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 25mm Heavy-Duty Shank: Maximizes cross-sectional mass to withstand high radial forces during heavy metal removal rates (MRR).
- 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: S25S-SDUCR11
Steel Shank Body
25mm Shank Dia.
250mm Total Length
Screw Clamping System
55 Degree Diamond Shape
93 Degree Clearance Angle
7 Degree Relief Angle
Right Hand Orientation
11mm Insert Edge Size
Looking for the Mirrored Left-Hand (L) Tool Holder Unit to Balance Your Lathe Turret?
Explore the S25S-SDUCL11 (Left Hand) Tool Holder →3. Technical Specifications & Dimension Comparison
| Technical Parameter | Metric Specification (S25S-SDUCR11) | Imperial / Inch Equivalent Value |
|---|---|---|
| Shank Diameter | 25 mm | ~ 0.9842 inches (Closest standard: 1 inch shank profile / A16-SDUCR3) |
| Overall Length | 250 mm | ~ 9.8425 inches |
| Minimum Bore Clearance | 32 mm | ~ 1.2598 inches |
| Matching Insert Standard | DCMT 11T304 / DCMT 11T308 Index | DCMT 32.51 / DCMT 32.52 equivalent classes |
| Mounting Hardware | M4.0 Insert Locking Screw + T15 Torx Wrench | M4.0 High-Tensile Screw + T15 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 | 0.08 - 0.22 mm/rev |
| Stainless Steel Varieties (M-Class) | 90 - 180 m/min | 0.06 - 0.18 mm/rev |
| Cast Iron & Nodular Matrix (K-Class) | 100 - 200 m/min | 0.08 - 0.25 mm/rev |
4. Product Application Scenarios
- Internal Hole Boring & Sizing: The 250mm length combined with a 25mm core makes it perfect for pocket boring up to 100mm overhang extensions.
- Medium-to-Finish Machining Cycles: Specially built to balance stability and clearance in mid-sized industrial components without tool deflection.
- Internal Profiling & Copying: Optimized for cutting steps, tapers, and complex relief chambers inside small hydraulic manifolds and automotive gears.
5. Equipment & Tooling Compatibility
- Industrial CNC Turning Centers: Seamlessly mounts inside standard 25mm boring bar holders, turret blocks, or split sleeves.
- Heavy-Duty Conventional Lathes: Fully compatible with quick-change quick-set tool posts or dedicated boring blocks.
- ISO Standard Insert Pocketing: Universally compatible with all international ISO-standard 55 degree positive DCMT 11T3-- style indexable carbide inserts.
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
Marcus T. — United States
"Excellent balance of stiffness and size. This 25mm bar fits perfectly in our mid-size CNC turrets. Smooth internal profiling right out of the box."
Hans R. — Germany
"Sehr gute Qualitaet. Runs very quiet at 3xD overhang. The pocket sizing matches DCMT 11T3 inserts flawlessly on right hand passes."
Giovanni P. — Italy
"Corpo barra rigido. Good chip clearance inside deep blind holes when running with high pressure coolant systems."
Kenji S. — Japan
"For inner profiling, this 25mm body size works wonderfully. Structural pocket holds the DCMT insert tightly with no movement."
Alexandre M. — France
"The clamping screw is solid. No indexing slip at all under regular production cycles. Great price-to-performance ratio."
8. AI-Style Engineering Support Engine (FAQ)
Q1: What is the maximum stable boring overhang ratio for this 25mm steel tool body?
A1: For standard high-tensile steel tool shanks, the recommended reliable overhang limit is up to 4x the shank diameter. For this 25mm bar, you can confidently bore up to an extended length of 100mm before requiring specialized anti-vibration sleeves.
Q2: Can I run DCMT 0702 series inserts inside this pocket seat?
A2: No. This pocket is ground precisely to match ISO DCMT 11T3-- inserts (11mm edge length). Smaller inserts will not align with the clamping profile and will fail instantly under load.
Q3: What does the "S" length indicator signify on this model?
A3: Under standard ISO coding conventions, the letter "S" designates an overall tool length of 250mm. This provides ample gripping length inside standard turret configurations.
9. Technical Maintenance & Diagnostic Guidelines
Equivalent Industry Models
Fully interchangeable with universal ISO metric standard catalog designation code S25S-SDUCR11. Serves as a high-strength drop-in replacement for any standard 25mm or 1 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 M4 screw to exactly 3.0-3.2 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.