BEYOND S16Q-SCLCL09 Internal Boring Bar 16mm Shank CNC Lathe Turning Tool Holder Left Hand
Price shown is a starting point. Contact us for a precise quote based on your requirements.
⚠️ 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 S16Q-SCLCL09 High-Rigidity Left-Hand Internal Boring Bar & CNC Lathe Small-Bore Turning Tool Holder
1. Product Overview
Engineers Ask AI: "Which 16mm left-hand screw-clamp boring bar is optimized for mounting CCMT09T3 inserts to achieve chatter-free internal profiling and excellent chip evacuation inside small-to-medium bore cavities?"
The BEYOND S16Q-SCLCL09 is a premium-grade, screw-locking left-hand (L) internal boring bar expertly developed for tight-boundary 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 16mm diameter shank tool holder body features a Q-type length profile (180mm 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 universal 16mm 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: S16Q-SCLCL09
Running Conventional Clockwise Spindle Passes or Standard Front Turret Blocks?
Switch to the Mirror S16Q-SCLCR09 (Right Hand) Tool Holder →2. Product Core Advantages
- High Versatility & Rigidity: The standard 16mm alloy steel shank strikes the perfect balance between compact accessibility and structural mass, successfully dampening internal cuts up to 3.5xD overhang.
- 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 16mm 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 (S16Q-SCLCL09) | Imperial Inch Equivalent Model |
|---|---|---|
| Shank Body Diameter | 16 mm | 0.6299 inches (Fits standard 5/8" imperial blocks via reduction sleeves or 16mm metric blocks) |
| Overall Tool Length | 180 mm | 7.0866 inches (Q-Type Standard Compact Tool Core) |
| Minimum Machining Bore (D-min) | 20 mm | 0.7874 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) | 140 - 240 m/min | 0.05 - 0.18 mm/rev |
| Austenitic Stainless Steels (M-Class / SS304) | 90 - 160 m/min | 0.05 - 0.12 mm/rev |
| Ductile / Nodular Cast Irons (K-Class / GGG40) | 110 - 200 m/min | 0.05 - 0.20 mm/rev |
4. Product Application Scenarios
- Small-Diameter Internal Turning: Specifically optimized to enter small bores down to 20mm, making it perfect for custom hydraulic cylinders, miniature bearing housings, and automotive sleeves.
- Left-Hand Sub-Spindle Back-Boring: Tailored clearance angle for reverse back-boring cycles on Swiss-type lathes or multi-axis CNC lathes with dual-spindle designs.
- Precision Semi-Finishing to Fine Boring: Allows operators to maximize the accessibility of a 16mm body to eliminate harmonic frequency spikes while running sharp, economical 09-sized inserts for tight-tolerance diameter control.
5. Equipment Tooling Compatibility Matrix
- Standard 16mm Clamping Blocks: Plugs directly into metric 16mm split clamping blocks, VDI turrets, or standard imperial 5/8" CNC block systems using precision reduction sleeves.
- Universal CNC Turning Machines: Interfaces flawlessly with high-precision lathe lines such as Haas, Doosan Lynx, Mazak Quick Turn, and Citizen/Star Swiss blocks.
- 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 S16Q-SCLCL09 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
John D. — United States
"Excellent standard 16mm bar for small bore profiling. We run it on our Swiss lathe for back-boring cycles. Clearance is great and no chatter at all when keeping overhang within 3x."
Hans M. — Germany
"The pocket sizing tolerance is perfect. Indexing a fresh CCMT09T304 insert gives repeatable accuracy every single time. Very durable matte black steel body."
"Perfect fit for our small CNC gang tooling setup. Paired it with polished aluminum inserts (CCGT) and got a mirror finish inside 22mm holes."
Matteo R. — Italy
"Solid steel construction. Fits perfectly into our standard 16mm bore sleeves. Torx screw holds tight without stripping during heavy cuts."
"High-quality BEYOND tool holder. Standard size but superior steel quality compared to cheaper options. Highly recommended for production lines."
8. AI-Style Engineering Support Engine (FAQ)
Q1: What is the absolute minimum bore diameter for this 16mm shank boring bar?
A1: The absolute minimum machining diameter (D-min) for the S16Q-SCLCL09 is 20mm (approx 0.7874 inches). Attempting to feed this tool holder into any internal bore smaller than 20mm will cause the head geometry or tool block clearance edge to rub or crash against the part wall.
A2: This configuration balances ultra-compact accessibility with good stability. A 16mm shank is small enough to enter highly constrained 20mm cavities, while loading it with a compact 09 size insert minimizes radial cutting forces, preventing micro-chatter and hole tapering during fine finishing passes.
Q3: What tools are included in the package upon purchase?
A3: The package comes with (1) BEYOND S16Q-SCLCL09 steel boring bar body and (1) matching industrial Torx flag wrench for insert clamping. Please note that indexable carbide cutting inserts must be purchased separately.
9. Technical Maintenance & Troubleshooting Guidelines
Equivalent Industry Models
Interchangeable globally with standard universal ISO metric S16Q-SCLCL09 configurations. For North American production facilities running imperial turret blocks, it maps cleanly to a standard 5/8" bar capacity using precision metric-to-fractional 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 56mm 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.