BEYOND S16Q-STUPL11 Left Hand Internal Turning Tool Holder | 16mm CNC Boring Bar
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💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
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:
Need Help With BEYOND Inserts?
Looking for a BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.