BEYOND S16Q-SSKCL09 Left Hand Boring Bar | 16mm CNC Lathe Internal Turning Tool Holder for SCMT 09T3 Inserts
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BEYOND S16Q-SSKCL09 Boring Bar – 16mm Left Hand Steel Screw Locking CNC Lathe Internal Turning Tool Holder
1. Product Overview
"Which left-hand 16mm boring bar ensures optimum chip evacuation and rigid structural stability for reverse spindle internal turning with SCMT 09T3 inserts?"
The BEYOND S16Q-SSKCL09 represents the definitive industrial standard for a Solid Alloy Steel Left Hand Internal Turning Boring Bar, precision-developed to execute highly consistent internal profiling, boring, and face cycles on modern CNC lathes. Engineered with a compact 16mm shank diameter and a versatile 180mm overall length, this tool holder delivers an outstanding balance of structural mass and small-bore accessibility. It acts as a rugged barrier against harmonic micro-chatter during medium-depth internal passes, ensuring tighter dimensional repeatability across continuous production shifts.
This premium tool holder is meticulously pocket-milled to house standard SCMT 09T3 / SCGT 09T3 square indexable carbide inserts. Incorporating a 75-degree side cutting approach angle, it effectively redirects high radial push deflection into stable axial forces running straight down the longitudinal core of the 16mm 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 21mm, protecting the machined surface from scratching or bird-nesting traps.
2. Product Core Features
- Precision Left-Hand (LH) Layout: Fully optimized configuration for reverse spindle directions (M04) and specific turret clamping requirements.
- Vacuum-Hardened Alloy Steel Body: Thermal-treated matrix increases fatigue limits and yields superior dampening characteristics under variable chip thicknesses.
- 75° Taper-Preventing Approach Geometry: Converts radial push back into structural compression load, maintaining extreme boring straightness over medium-depth bores.
- Low-Profile Torx Screw Clamping System: Utilizes a highly flush M3.5 screw locking mechanism that completely eliminates bulky top clamps, maximizing clear chip evacuation space.
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 S16Q-SSKCL09 model:
| Parameter Dimension | Metric System Specification | Imperial Equivalent Measurement |
|---|---|---|
| Shank Diameter (d) | 16 mm | 0.6250 inches (Fits perfectly within standard 5/8" imperial split reduction sleeves) |
| Total Tool Length (L) | 180 mm | 7.0866 inches (Compact format optimized for versatile mid-depth internal turning) |
| Minimum Bore Diameter (D-min) | 21 mm | 0.8267 inches (Provides exceptional clearance for clean chip removal in tight bores) |
| Compatible Carbide Insert Layout | SCMT 09T3xx / SCGT 09T3xx | SCMT 3(2.5)1 / SCMT 3(2.5)2 (3/8" IC Square Size, 3.97mm Thick) |
| Clamping Screw Model Type | M3.5 x 9.0 | M3.5 x 0.3543 inches |
| 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) | 120 - 190 m/min (393 - 623 SFM) | 0.06 - 0.18 mm/rev (0.0023 - 0.0070 IPR) |
| Stainless Steel Matrix (304, 316, 420) | 70 - 130 m/min (229 - 426 SFM) | 0.05 - 0.14 mm/rev (0.0019 - 0.0055 IPR) |
| Cast Iron Grades (GG25, GGG40) | 80 - 160 m/min (262 - 524 SFM) | 0.08 - 0.22 mm/rev (0.0031 - 0.0086 IPR) |
4. Product Application Scenarios
The rigid steel composition and popular 16mm left-hand geometry make the S16Q-SSKCL09 a versatile asset across production fields:
- Left-Hand Boring and Back-Turning: Highly efficient for machining internal profiles from the inside out or executing specialized back-boring operations in tighter cavities.
- Multi-Step Internal Profiling: The 75° approach angle allows the tool to run continuous profiling paths, interpolating intricate internal steps with high accuracy.
- Small-Bore Component Machining: Extensively deployed across general workshops for machining hydraulic valve blocks, custom bushings, and aerospace components.
5. Compatibility & Equipment Interface
The ground 16mm cylindrical tool body locks firmly into industry-standard metric CNC lathe turrets, static VDI/BMT tool block clamps, and linear gang-tool slides. For workshops operating on imperial standards, it adapts flawlessly inside standard 5/8-inch imperial split bushes. 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 S16Q-SSKCL09 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 titanium alloys.
- 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 S16Q-SSKCL09 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 dropped this 16mm left-hand bar into a standard 5/8 split sleeve on our Haas lathe. Absolute game changer for our back-boring cycles. The SCMT 09T3 inserts hold up beautifully with zero chatter marks.
Der 16mm Stahlschaft dämpft Schwingungen erstaunlich gut für diese kompakte Größe. Wir fertigen damit Ventilhülsen aus Edelstahl. Da es sich um eine linksbündige Ausführung handelt, ideal für unsere spezifische Revolverbelegung.
Solid alloy steel layout. The 75-degree lead angle handles internal steps very accurately with minimal push-off deflection. Pocket tolerances are incredibly precise.
逆転主軸（M04）でのバックボーリング用に導入しました。16mmシャンクながら剛性が高く、切り屑の排出スペースも十分に確保できます。SCMTチップがガタつきなくロックされるので安心です。
Left-hand setups can sometimes be tricky with chip wrapping, but the low-profile screw design on this bar clears everything smoothly under high pressure coolant. Highly recommended.
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.