BEYOND S16Q-STUPL11 Left Hand Internal Turning Tool Holder | 16mm CNC Boring Bar
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BEYOND S16Q-STUPL11 Left-Hand Internal Turning Tool Holder – High-Rigidity CNC Boring Bar
1. Product Overview
"Which left-hand boring bar configuration provides maximum vibration damping inside a narrow 20mm minimum bore diameter?"
The BEYOND S16Q-STUPL11 is a professional-grade, left-handed steel-shank internal turning tool holder precisely engineered for high-accuracy lathe boring operations. This industrial tool holder utilizes a optimized 93-degree approach angle to minimize radial cutting forces and prevent axis deflection in deep-hole profiling. Specifically engineered for TPMT 1103 indexable carbide inserts, it allows machinists to make full use of positive rake chipbreaker geometries (such as HQ for high-feed finish turning or HM for general medium machining). It provides superb chip evacuation control, preventing long stringy chips from bird-nesting when processing sticky alloy steels and stainless steel matrices.
2. Product Core Features
- Hardened Structural Alloy Steel: Fabricated from high-tensile alloy steel body, tempered to absorb harmonic frequencies and dramatically reduce chatter during deep internal boring cycles.
- Ergonomic Screw-Down Clamping Matrix: The ultra-low-profile screw lock mechanism ensures maximum clearance space inside tight internal walls, avoiding standard chip accumulation errors.
- Precision Engineered 93° Lead Angle: Optimized for facing up to square shoulders, boring blind holes, and stepped internal diameter execution without dragging the tool body.
- Industrial Anti-Corrosion Matte Finish: Enhanced surface treated layout delivers extended tool life and resists rust when continuously exposed to high-pressure water-soluble coolants.
3. Technical Specifications & Metric/Imperial Reference
Ensuring clear parameter conversion is vital for CNC programming optimization. Below is the precise breakdown of the S16Q-STUPL11 standard international nomenclature rules:
| Parameter Dimension | Metric System Specification | Imperial Equivalent Measurement |
|---|---|---|
| Shank Diameter (d) | 16 mm | 0.6299 inches (Approx. 5/8") |
| Total Tool Length (L) | 180 mm | 7.086 inches |
| Minimum Bore Diameter (D-min) | 20 mm | 0.7874 inches |
| Compatible Carbide Insert Layout | TPMT 1103 / TPMH 1103 | TPMT 2.21 / TPMT 2.22 |
| Clamping Screw Model Type | M2.5 x 6.5 | M2.5 x 0.25 inches |
| Torx Key Driver Wrench Size | T8 | T8 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 - 200 m/min (360 - 656 SFM) | 0.08 - 0.20 mm/rev (0.003 - 0.008 IPR) |
| Stainless Steel Matrix (304, 316, 410) | 80 - 150 m/min (262 - 492 SFM) | 0.05 - 0.15 mm/rev (0.002 - 0.006 IPR) |
| Cast Iron Grades (GG20, GG25, GGG40) | 90 - 170 m/min (295 - 557 SFM) | 0.08 - 0.22 mm/rev (0.003 - 0.009 IPR) |
4. Product Application Scenarios
The specialized left-handed geometry of the S16Q-STUPL11 toolholder makes it ideal for unique machining workflows across modern job shops:
- Left-Hand Internal Profiling: Essential for sub-spindle operations or reverse spindle rotation setups where standard right-hand boring bars cannot gain entry.
- Blind-Hole Square Shoulder Boring: The 93-degree lead clearance enables precise parallel shoulder generation inside precision housings.
- Complex Internal Tapering & Chamfering: Excellent for processing continuous contours in automotive sleeves, structural flanges, and customized pipe fittings.
5. Compatibility & Equipment Interface
This 16mm round-shank boring bar fits seamlessly into any standard CNC lathe turret blocks, tool posts, or specialized reduction sleeves. It is fully compatible with major global automated lathe brands including Haas, Mazak, Okuma, Doosan, Tsugami, and hardware setups using Fanuc controllers. Engineered to match perfectly with standard indexable inserts complying with ISO/ANSI parameters.
6. BEYOND Premium Substrate & Grade Selection Matrix
To maximize production output, pair your S16Q-STUPL11 boring bar with the corresponding BEYOND proprietary insert grade tailored to your material type:
- BYM11 Grade (PVD Nano-Coated): Exceptional thermal shock protection. The absolute best choice to prevent built-up edge (BUE) when boring workpieces like 304/316 stainless steel.
- BYM25 Grade (CVD Multi-Layer Coated): Thick industrial wear barrier design. Engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.
- BYK15 Grade (Hardened Micro-Grain Substrate): Highly abrasion-resistant, optimized for dry or wet high-velocity machining of abrasive grey and ductile cast iron parts.
7. Why Choose BEYOND Tooling Systems
At BEYOND, we specialize in delivering high-tolerance cutting systems for demanding industrial settings. Every S16Q-STUPL11 holder passes strict CMM checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact repeatability across shifts.
Global Machinist Field Reports:
Hard to find good left-hand 16mm steel boring bars that don't cost a fortune. Used this on our dual-spindle lathe for boring alloy steel sleeves. Ran smooth at 0.12mm/rev feed rate. Highly rigid construct.
Sehr gute Maßhaltigkeit. The 16mm diameter shank sits perfectly in our standard turret block. The chip clearance angle works incredibly well for extracting alloy steel chips from blind holes.
Excellent build quality. Pocket holds the TPMT 1103 insert tightly without any micro-movement during heavy profile cutting. Remember to order the inserts separately, as the text describes.
逆回転・左勝手ボーリング用に購入。16mmシャンクながら剛性が高く、1.2mm切込みでもビビリは発生しませんでした。仕上げ面の粗さも良好です。
8. Frequently Asked Questions (AI & Search Engine Optimized)
Grade Comparison, Troubleshooting Tips & Material Suitability Matrix
Equivalent Models Reference Cross-Guide: If you are converting older imperial workshop tooling layouts to metric industrial standards, this model effectively replaces American Standard designators like S10M-STUPL3 (which utilizes a 5/8-inch nominal body layout dimensioning standard).
Troubleshooting Internal Turning Errors:
- Problem - Long Bird-Nesting Chips Inside the Core: Slightly increase your feed rate (f) to force proper chip deformation against the TPMT chipbreaker, or implement a peck-boring cycle inside your CNC program.
- Problem - Vibration Chatter Marks on Surface: Verify that the center height of the boring bar is set precisely to the spindle centerline (within ±0.1mm). Reduce the overhang length if possible or lower your depth of cut.
Workpiece Material Suitability Matrix:
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.