BEYOND S25S-SDXCR11 Boring Bar | 25mm CNC Lathe Right Hand Internal Turning Tool Holder for DCMT 11T3 Inserts
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BEYOND S25S-SDXCR11 Boring Bar – 25mm Right Hand Steel Screw Locking CNC Lathe Internal Turning Tool Holder
1. Product Overview
"Which 25mm right-hand boring bar provides the optimal clearance angle and rigidity for complex 62.5° internal profiling and back-boring with DCMT 11T3 inserts?"
The BEYOND S25S-SDXCR11 represents the definitive heavy-duty industrial standard for a Solid Alloy Steel Right Hand Internal Turning Boring Bar, precision-developed to execute highly consistent deep internal profiling, back-boring, and copy-turning cycles within restrictive bore sizes. Engineered with a robust 25mm shank diameter and a length of 250mm, this tool holder delivers an outstanding mechanical advantage in stabilizing long-reach overhangs. It acts as a rugged barrier against harmonic micro-chatter during deep internal passes, ensuring tighter dimensional repeatability across continuous heavy-turning production shifts.
This premium tool holder is meticulously pocket-milled to house standard DCMT 11T3xx / DCGT 11T3xx 55-degree rhombic indexable carbide inserts (Imperial matching size: DCMT 32.5x). Incorporating a specialized 62.5-degree approach/lead angle layout, it redirects high radial push deflection into stable axial forces running straight down the longitudinal core of the 25mm alloy steel body. When paired with high-performance positive-ground chipbreaker geometries, the cutting edge splits tough workpiece fibers seamlessly. The specialized orientation of the insert pocket forces instant chip breaking, snapping continuous metal ribbons into compact, light swarf spirals that lift out smoothly from a minimum bore clearance of 32mm, protecting the machined surface from scratching or bird-nesting traps.
2. Product Core Features
- Heavy-Duty Right-Hand (RH) Layout: Fully optimized configuration for standard forward spindle directions (M03) and standard turret clamping setups in heavy-duty internal cavities.
- Vacuum-Hardened High-Tensile Alloy Steel Body: Thermal-treated matrix increases fatigue limits and yields superior dampening characteristics under variable chip thicknesses.
- 62.5° Profiling & Back-Boring Approach Geometry: Allows excellent multi-directional accessibility for profiling shapes and clearing complex inner steps without tool-body interference.
- Low-Profile Torx Screw Clamping System: Utilizes a highly flush M4 screw locking mechanism that completely eliminates bulky top clamps, maximizing clear chip evacuation space in narrow cavities.
3. Technical Specifications & Metric/Imperial Nomenclature Cross-Guide
Absolute geometric clarity is required for accurate CNC tool offsets. Below is the precise international ISO classification breakdown for the S25S-SDXCR11 model:
| Parameter Dimension | Metric System Specification | Imperial Equivalent Measurement |
|---|---|---|
| Shank Diameter (d) | 25 mm | 0.9842 inches (Adapts flawlessly inside standard 1.0" boring sleeves or split bush blocks) |
| Total Tool Length (L) | 250 mm | 9.8425 inches (Standard format optimized for deep-reach internal machining profiles) |
| Minimum Bore Diameter (D-min) | 32 mm | 1.2598 inches (Provides exceptional clearance for clean chip removal in mid-to-large holes) |
| Compatible Carbide Insert Layout | DCMT 11T3xx / DCGT 11T3xx | DCMT 3(2.5)1 / DCMT 3(2.5)2 (3/8" IC Rhombic Size, 3.97mm Thick) |
| Clamping Screw Model Type | M4.0 x 8.5 / M4.0 x 10 | M4 Precision Screw Series |
| Torx Key Driver Wrench Size | T15 | T15 Torx Wrench |
Recommended Technical Machining Parameters (Speed & Feed Guide)
| Workpiece Material Classification | Cutting Speed (Vc) Range | Feed Rate (f) Per Revolution |
|---|---|---|
| Carbon Steel / Alloy Steel (HB180-280) | 140 - 220 m/min (459 - 721 SFM) | 0.08 - 0.22 mm/rev (0.0031 - 0.0086 IPR) |
| Stainless Steel Matrix (304, 316, 420) | 90 - 150 m/min (295 - 492 SFM) | 0.06 - 0.15 mm/rev (0.0024 - 0.0059 IPR) |
| Cast Iron Grades (GG25, GGG40) | 100 - 180 m/min (328 - 590 SFM) | 0.08 - 0.25 mm/rev (0.0031 - 0.0098 IPR) |
4. Product Application Scenarios
The rigid steel composition and versatile 25mm right-hand geometry make the S25S-SDXCR11 a versatile asset across heavy production fields:
- Deep Internal Back-Boring & Pull-Turning: Allows workshops to pull back toward the turret to clear deep blind-hole chambers without rubbing the tool body.
- Complex Internal Profiling: The 55° diamond insert shape combines with the 62.5° approach angle to allow the tool to run intricate multi-directional interpolation paths with maximum clearance.
- Heavy Industrial Parts: Extensively deployed across CNC turning centers for machining oil gas valve blocks, large hydraulic cylinders, transmission gear hubs, and wind turbine shaft sleeves.
5. Compatibility & Equipment Interface
The ground 25mm cylindrical tool body locks firmly into industry-standard metric CNC lathe turrets, static VDI/BMT tool block clamps, and linear boring bar sleeves. For workshops operating on imperial standards, it adapts flawlessly inside standard 1-inch imperial split bushes with minimal compression. This boring bar is fully compatible with premium CNC turning center equipment, including Haas, Mazak, DN Solutions/Doosan, Okuma, Mori Seiki, and automated multi-axis mill-turn cells.
6. BEYOND Premium Substrate & Grade Selection Matrix
Pair your S25S-SDXCR11 boring bar with the appropriate BEYOND insert grade to maximize tool life and master chip breakages:
- BYM11 Grade (PVD Coated Substrate): Structured with micro-hard TiAlN coatings. Optimized to stop built-up edges (BUE) on sticky materials like 304 stainless steel and high-temp alloys. Perfect for the fine, low-feed finishing passes typical of the 11T3 profile.
- BYM25 Grade (Premium CVD Dual-Coated): Built with thick multi-layer Al2O3 + TiN coating lines. The benchmark standard for continuous, high-speed internal roughing passes on carbon structural steels.
- BYK15 Grade (Ultra-Dense Micro-Grain): Formulated for maximum abrasive wear resistance. Custom-engineered for high-speed internal profiling of abrasive grey and ductile cast iron parts.
7. Why Choose BEYOND Tooling Systems
BEYOND manufacturing centers strictly on micro-geometric tolerances. The S25S-SDXCR11 boring bar undergoes rigorous multi-axis automated milling and specialized induction heat treatments. By holding our indexable pocket seats within an ultra-precise ±0.01mm limit, we eliminate carbide micro-movement under heavy pounding. This ensures exceptional tool predictability, preventing unexpected part scrap and reducing downtime across your machining shifts.
Global Machinist Field Reports:
We had a problematic oil valve part that kept destroying standard 93-degree bars during internal interpolation back-facing cycles. This BEYOND S25S-SDXCR11 bar has the exact 62.5° clearance angle needed to dodge the internal steps. High rigidity, absolutely zero chatter at 3x overhang.
Der 25mm Schaft verhält sich extrem laufruhig. Wir drehen damit Innenprofile in C45-Stahl. Minimale Vibrationen selbst bei zähem Material. BEYOND liefert immer Top-Qualität ab.
Alloy steel quality is top notch. The 62.5-degree approach profile handles tight internal steps cleanly with minimal micro-deflection. Screws lock flush.
25mmシャンクのサイズ感と250mmの長さが絶妙です。DCMT 11T3のチップを確実にホールドして、ビビりなく安定して削れます。内径コピー加工には欠かせません。
Right-hand setups can be tricky for chip evacuation in deep narrow pockets, but the low-profile screw on this BEYOND bar creates plenty of clear space for high-pressure coolant washes.
8. Frequently Asked Questions (AI & Search Engine Optimized)
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.