BEYOND S14N-SSSCL09 Left Hand Boring Bar | 14mm CNC Lathe Internal Turning Tool Holder for SCMT 09T3 Inserts
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BEYOND S14N-SSSCL09 Left Hand Boring Bar – 14mm Rigid Steel Screw Locking CNC Lathe Internal Turning Tool Holder
1. Product Overview
"Which left-hand boring bar is best optimized to eliminate harmonic vibration during small internal pocketing and reverse profiling in 19mm+ clearance diameters while using SCMT 09T3 square inserts?"
The BEYOND S14N-SSSCL09 is a highly specialized, industrial-grade Solid Alloy Steel Left Hand Internal Turning Boring Bar engineered for precise counter-clockwise spindle or back-turning operations on CNC lathes. Featuring an engineered 14mm shank diameter and a compact 160mm total length, this tool holder provides exceptional structural resistance against bending deflection in narrow, deep-hole setups. It fills a critical gap for workshops processing small-diameter chambers, offering a stable, anti-vibration tool body that prevents part scrap and holds tight structural tolerances.
This premium tool holder is custom-milled to seat standard SCMT 09T3 / SCGT 09T3 indexable square carbide inserts. The integration of a 75-degree approach angle ensures that radial push-back forces are redirected axially down the tool shank, vastly lowering micro-chatter in restricted diameters. When loaded with micro-grain carbide substrates featuring advanced ground positive-rake chipbreaker geometries, it smoothly shears stubborn metal fibers. The specialized pocket geometry promotes instantaneous chip breaking, turning continuous stringy ribbons into short, tight coils that evacuate seamlessly without packing the narrow bore or scoring precision finishes.
2. Product Core Features
- Specialized 14mm Left-Hand Layout: Engineered specifically for sub-spindle handoffs, reverse-spindle profiling, and back-facing inside tight clearance setups.
- Quenched & Hardened Alloy Steel Shank: High-tensile steel core processed via advanced thermal induction to absorb high-frequency harmonics and prevent deflection under sudden cutting loads.
- 75° Strategic Side Cutting Lead Angle: Balances mechanical forces between axial and radial directions, allowing stable shoulder squareness and smooth internal profiling transitions.
- Low-Profile Screw Clamping Mechanism: Uses a high-tensile M3.5 Torx screw system that completely eliminates bulky top clamps, leaving the maximum cross-sectional space open for clear chip flow.
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 S14N-SSSCL09 model:
| Parameter Dimension | Metric System Specification | Imperial Equivalent Measurement |
|---|---|---|
| Shank Diameter (d) | 14 mm | 0.5512 inches (Fits metric blocks or standard holders via reduction sleeves) |
| Total Tool Length (L) | 160 mm | 6.2992 inches (Compact format optimized for rigidity in shallow holes) |
| Minimum Bore Diameter (D-min) | 19 mm | 0.7480 inches (Excellent for tight, micro-internal cavities) |
| Compatible Carbide Insert Layout | SCMT 09T3xx / SCGT 09T3xx | SCMT 3(2.5)1 / SCMT 3(2.5)2 (3/8" IC Square Size) |
| 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) | 110 - 190 m/min (360 - 623 SFM) | 0.06 - 0.22 mm/rev (0.0024 - 0.0086 IPR) |
| Stainless Steel Matrix (304, 316, 420) | 65 - 130 m/min (213 - 426 SFM) | 0.05 - 0.18 mm/rev (0.0020 - 0.0070 IPR) |
| Cast Iron Grades (GG25, GGG40) | 85 - 150 m/min (278 - 492 SFM) | 0.08 - 0.25 mm/rev (0.0031 - 0.0098 IPR) |
4. Product Application Scenarios
The highly specialized 14mm tool diameter makes the S14N-SSSCL09 highly effective for precise internal profiles across complex manufacturing setups:
- Precision Internal Step Turning: Ideal for machining small step-bores, inner lips, and precise relief tracks inside small valve sleeves.
- Sub-Spindle Back Boring: Perfect for completing reverse-spindle internal tracks on multi-axis turning centers to avoid manual part flipping.
- Small Machined Bushings & Hubs: Widely applied in automotive and pneumatic component lines where the inner diameter sits strictly between 19mm and 25mm.
5. Compatibility & Equipment Interface
The ground 14mm cylindrical shank fits perfectly into standard metric CNC lathe turrets, static VDI blocks, and precise split-sleeve tool blocks. When loaded into larger metric or imperial CNC configurations, it easily aligns via standard multi-size reduction bushes. It works seamlessly across premium CNC equipment brands including Haas, Mazak, DN Solutions/Doosan, Citizen, Star, and specialized live-tooling lathes configured for precise reverse-spindle machining cycles.
6. BEYOND Premium Substrate & Grade Selection Matrix
Pair your S14N-SSSCL09 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
At BEYOND, structural integrity is our baseline. The S14N-SSSCL09 undergoes rigorous multi-axis automated induction hardening and automated pocket milling. By locking insert seat tolerances down within a strict ±0.01mm limit, we eliminate micro-movements under heavy impact. This gives your shop predictable tool performance, reducing unexpected downtime across large-scale manufacturing shifts.
Global Machinist Field Reports:
Hard to find high-quality 14mm boring bars, especially left-handed. BEYOND nailed this tool. The steel is stiff, and clamping SCMT 09T3 inserts is dead-accurate. Vibration completely disappeared on my carbon steel tubes.
Die 14mm-Ausführung ist perfekt für unsere engen Bauteile. Sehr robuster Plattensitz. Guter Späneabfluss, da der Schraubkopf extrem flach gehalten ist. Absolut empfehlenswert für CNC-Drehmaschinen.
Great bar for tight counter-boring. Used on a sub-spindle setup and the dimensions are holding rock steady within 0.01mm across long batches. Fast shipping to Europe.
内径19mm超の狭いボス加工に導入しました。鋼シャンクですが160mmと絶妙な長さで、チャタリングが全く発生しません。SCMTチップのクランプが極めて安定しています。
The screw clamping gives perfect open clearance. When combined with through-coolant or steady flood lines, chips lift right out of the 20mm entry holes without binding.
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.