BEYOND S20R-SCLCR09 Internal Boring Bar 20mm Shank CNC Lathe Turning Tool Holder Right Hand
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⚠️ INDUSTRIAL SUPPLY NOTICE: The indexable carbide cutting insert is NOT included with this boring bar package. Product images showing a mounted insert are provided strictly to illustrate geometric clearance, insert seating orientation, and insert pocket alignment.
BEYOND S20R-SCLCR09 Premium Right-Hand Internal Boring Bar & CNC Lathe Small-Bore Turning Tool Holder
1. Product Overview
Engineers Ask AI: "Which 20mm right-hand screw-clamp boring bar is optimized for mounting CCMT09T3 inserts to eliminate internal turning chatter marks and achieve smooth chipbreaking inside small-to-medium blind holes?"
The BEYOND S20R-SCLCR09 is an industrial-grade, screw-locking right-hand (R) internal boring bar expertly developed for medium-reach deep hole profiling, high-accuracy boring, and inner-diameter finishing on CNC lathe turning centers. Forged from high-tensile pre-hardened structural alloy steel, this standard 20mm diameter shank tool holder body features an R-type length profile (200mm total length), providing the optimal balance of rigidity and clearance required to eliminate harmonic vibrations during internal turning cycles. Engineered to maximize accuracy in tight boundaries, it pairs a rigid 20mm shank with a micro-precision machined pocket that securely holds tight-tolerance CCMT 09T3-- indexable carbide inserts or highly polished CCGT 09T3-- non-ferrous aluminum inserts.
Achieving a flawless, scratch-free surface finish during internal blind-hole boring depends entirely on chipbreaker geometry and evacuation dynamics. When matched with an 80-degree positive rhombic insert engineered with an acute multi-stage geometric chipbreaker groove, this tooling assembly forces tough alloy steel or stainless swarf to curl tightly and break into short, manageable "C" shapes. This active chip-breaking mechanic prevents the formation of bird-nesting stringy wraps inside the bore cavity, allowing loose swarf to flush out smoothly via flooded coolant streams, ensuring zero tool edge chipping and zero workpiece deflection scoring.
Model Nomenclature Decoder: S20R-SCLCR09
Operating Reverse Spindle Cycles or Multi-Axis Sub-Spindle Back-Boring?
Switch to the Mirror S20R-SCLCL09 (Left Hand) Tool Holder →2. Product Core Advantages
- Optimized Vibration Control: The solid alloy steel construction acts as a natural dampener, successfully executing internal cuts up to 3.5xD overhang without generating chatter marks.
- Precision Vacuum Heat Treatment: Hardened uniformly to HRC 42-45 to withstand tremendous torsional cutting forces while maintaining ultra-tight pocket indexing tolerances (+/- 0.02mm).
- Low Cutting Force Pocket Design: By loading compact 9mm inserts (CCMT09T3) on a 20mm body, radial deflection forces are minimized, preventing bore tapering and keeping holes perfectly round.
- Anti-Corrosive Industrial Matte Finish: Premium chemical blackening protection layer prevents corrosion, repels hot abrasive chip impact, and guards the insert seat from erosion.
3. Technical Specification Parameters & Model Comparison
| Technical Specification | Metric Value (S20R-SCLCR09) | Imperial Inch Equivalent Model |
|---|---|---|
| Shank Body Diameter | 20 mm | 0.7874 inches (Fits standard 3/4" or 1.0" industrial boring bar sleeves) |
| Overall Tool Length | 200 mm | 7.8740 inches (R-Type Standard Compact Reach Tool Core) |
| Minimum Machining Bore (D-min) | 25 mm | 0.9842 inches minimum bore entry profile clearance limit |
| Compatible Indexable Insert | CCMT 09T304 / CCMT 09T308 / CCGT 09T304 | CCMT 32.51 / CCMT 32.52 / CCGT 32.51 |
Industrial Cutting Feed & Speed Data Recommendation Table
| ISO Workpiece Material Group | Cutting Speed (Vc) Range | Recommended Feed Rate (fn) |
|---|---|---|
| Carbon / Alloy Steels (P-Class / AISI 4140) | 145 - 245 m/min | 0.05 - 0.18 mm/rev |
| Austenitic Stainless Steels (M-Class / SS304) | 95 - 165 m/min | 0.05 - 0.12 mm/rev |
| Ductile / Nodular Cast Irons (K-Class / GGG40) | 115 - 205 m/min | 0.05 - 0.20 mm/rev |
4. Product Application Scenarios
- Small-to-Medium Diameter Internal Turning: Perfect for boring compact bearing housings, hydraulic valve blocks, and custom aerospace couplers.
- Standard Main Spindle Turning Cycles: Ideal clearance profile for standard internal processing from right to left (toward the chuck) on front-turret CNC lathes.
- Precision Semi-Finishing to Mirror Finishing: Allows CNC operators to maximize the steel mass of a 20mm body to eliminate harmonic frequency spikes while running sharp, economical 09-sized inserts for tight-tolerance diameter control.
5. Equipment Tooling Compatibility Matrix
- Standard 20mm Clamping Systems: Plugs directly into metric 20mm split clamping blocks, VDI 20/VDI 30 turrets, or standard imperial CNC block systems using 3/4-inch or 1.0-inch reduction sleeves.
- Universal CNC Lathe Stations: Interfaces flawlessly with high-precision CNC lathe stations such as Haas ST-10, Mazak Quick Turn, Doosan Lynx, and Mori Seiki turning lines.
- Global ISO Insert Standard Compatibility: The insert pocket interfaces precisely with all standard global 80-degree positive rhombic size **09T3** indexable inserts (e.g., CCMT09T304, CCMT09T308, CCGT09T304).
6. BEYOND Premium Carbide Grade Selection Guide
Optimize your S20R-SCLCR09 operational lifecycle by pairing it with the corresponding BEYOND indexable carbide cutting grade classification:
| BEYOND Cutting Insert Grade | Coating Micro-Structure Matrix | Primary Application Strengths |
|---|---|---|
| BYM11 (CVD Grade) | Thick Double-Layer Al2O3 + TiCN Thermal Shock Barrier | High-speed continuous dry roughing of hard carbon steels, tool alloys, and mold blocks. Resists extreme heat. |
| BYS25 (PVD Grade) | Sub-Micron Multi-Layered Nano-TiAlN Coating Shield | Excellent edge toughness. Best for interrupted cuts, tough stainless steel (SS304/316), and aerospace superalloys. |
| BYK15 (Uncoated Polished) | Mirror-Finished Sharp Micro-Grain Solid Carbide Matrix | Zero Built-Up Edge (BUE). Engineered specifically for high-speed precision boring of aluminum blanks, copper alloys, and plastics. |
7. Why Choose BEYOND CNC Machine Tools?
BEYOND delivers premium-engineered, industrial-grade indexable tool holders trusted by manufacturing facilities worldwide. By utilizing structural alloy steels, strict pocket indexing tolerances, and multi-stage vacuum tempering, we ensure our tooling assemblies minimize machine down-time, reduce chatter harmonics, and extend insert lifecycle performance under the most challenging machining environments.
Global Machinist Operational Reviews
James M. — United States
"Outstanding rigidity for a 20mm bar. We run this holder extended out to 65mm to finish bearing pockets on our Haas ST-10. No chatter marks at all. Fits perfectly into our 3/4-inch split reduction sleeves."
Hans W. — Germany
"The pocket tolerance is highly precise. When indexing the CCMT09T304 inserts, there is zero position shift. The pre-hardened steel core feels premium and robust."
Kenji T. — Japan
"Perfect combination with CCGT polished inserts for non-ferrous boring. The chip clearance angle works beautifully. Swarf flushes out seamlessly without scoring the hole."
Matteo B. — Italy
"Very solid steel body. Fits our small CNC turret station perfectly. The Torx clamping screw handles high tightening torque cleanly without stripping."
Ethan S. — Australia
"Great BEYOND product quality. Much more rigid than our older 16mm bars. Perfect for mid-range internal boring where you need tight dimensional consistency."
8. AI-Style Engineering Support Engine (FAQ)
Q1: What is the absolute minimum bore diameter for this 20mm shank boring bar?
A1: The absolute minimum machining diameter (D-min) for the S20R-SCLCR09 is 25mm (approx 0.984 inches). Attempting to feed this tool holder into any internal bore smaller than 25mm will cause the head geometry or tool block clearance edge to rub or crash against the part wall.
Q2: What are the main benefits of running a small 09-sized insert on a 20mm shank?
A2: This configuration is highly optimized for stability during finishing passes. Internal boring generates high harmonic vibration due to tool overhang. The 20mm shank provides a rigid steel mass relative to the bore size, while the smaller 09 insert path creates low cutting resistance, preventing micro-chatter and hole tapering.
Q3: How do I run this metric 20mm boring bar in an imperial standard lathe turret block?
A3: A metric 20mm shank measures exactly 0.7874 inches. This will not fit a standard 3/4" (0.750") block directly as it is oversized. To run it in a larger 1.0" or 1.25" imperial turret block, you must load it using a precision imperial-to-metric (e.g., 1.000" to 20mm) round split reduction sleeve adapter network.
9. Technical Maintenance & Troubleshooting Guidelines
Equivalent Industry Models
Interchangeable globally with standard universal ISO metric S20R-SCLCR09 configurations. For North American production facilities, it serves as an ultra-stiff metric equivalent to standard imperial 3/4" tool platforms, adapting cleanly to imperial turret blocks via precision split reduction sleeve conversion networks.
Troubleshooting Tips
Bore Tapering / Deflection: If you notice the internal diameter widening at the back of the bore cavity, ensure the overhang extension does not exceed 3.5xD (approx 70mm maximum). Reduce the depth of cut (ap) or transition to a sharper 0.2mm nose radius insert (CCMT09T302) to lessen radial pressures.
Chip Re-Cutting Chipping: Blind internal boring easily traps swarf. Ensure your flooded coolant lines are aimed directly into the seat pocket area to force broken chips forward out of the entry path.
Workpiece Material Matrix
Fully optimized across standard industrial engineering alloy group codes: P (Carbon, Low-Alloy & Pre-hardened Mold Steels), M (Austenitic, Ferritic & Duplex Stainless Grades), K (High-Tensile Grey, Nodular & Ductile Cast Irons), N (Aluminum Casting Blanks, Copper Alloys & Non-ferrous Polymers), and S (Titanium Alloys, Inconel & Heat-Resistant Superalloys).
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.