BEYOND S10K-STWCL09 Left Hand Internal Turning Tool Holder | 10mm CNC Boring Bar
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BEYOND S10K-STWCL09 Left-Hand Internal Turning Tool Holder – High-Rigidity 10mm CNC Boring Bar
1. Product Overview
"Which 10mm left-hand boring bar provides optimal chip clearance and rigidity for internal turning or sub-spindle profiling inside narrow blind holes down to a 13mm minimum bore?"
The BEYOND S10K-STWCL09 is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for small-diameter, high-accuracy lathe boring operations on sub-spindles or reverse tool configurations. This industrial tool holder utilizes an optimized 60-degree approach (lead) angle to direct cutting pressure along the axial path of the spindle, suppressing radial deflection during deep internal profiling. Specifically engineered for TCMT 0902 / TCGT 0902 indexable carbide inserts, it allows machinists to harness the full potential of positive rake chipbreaker geometries (such as HM for general medium machining or HQ for high-feed finish turning). This setup delivers superb chip fragmentation control, preventing long stringy nesting when processing sticky alloy steels, carbon steels, and stainless steel matrices inside narrow, confined chambers.
2. Product Core Features
- Hardened Structural Alloy Steel: Fabricated from a heavy-duty, 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 and ensuring smooth evacuation.
- Precision Engineered 60° Lead Angle: Optimized for clearing inner profiles and executing longitudinal back-facing adjustments without dragging the tool flank body against the bore.
- 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 structural parsing of the S10K-STWCL09 standard international nomenclature rules:
| Parameter Dimension | Metric System Specification | Imperial Equivalent Measurement |
|---|---|---|
| Shank Diameter (d) | 10 mm | 0.3937 inches (Approx. 3/8") |
| Total Tool Length (L) | 125 mm | 4.9212 inches |
| Minimum Bore Diameter (D-min) | 13 mm | 0.5118 inches |
| Compatible Carbide Insert Layout | TCMT 0902xx / TCGT 0902xx | TCMT 1.8(1.5)1 / TCMT 1.8(1.5)2 |
| Clamping Screw Model Type | M2.2 x 5 | M2.2 x 0.19 inches |
| Torx Key Driver Wrench Size | T6 / T7 | T6 / T7 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 - 210 m/min (360 - 688 SFM) | 0.02 - 0.10 mm/rev (0.0008 - 0.0039 IPR) |
| Stainless Steel Matrix (304, 316, 410) | 70 - 135 m/min (230 - 443 SFM) | 0.02 - 0.08 mm/rev (0.0008 - 0.0031 IPR) |
| Cast Iron Grades (GG20, GG25, GGG40) | 85 - 160 m/min (278 - 525 SFM) | 0.03 - 0.12 mm/rev (0.0012 - 0.0047 IPR) |
4. Product Application Scenarios
The specialized 10mm left-handed geometry of the S10K-STWCL09 tool holder makes it highly effective for rigid internal processing across diverse turning operations:
- Sub-Spindle Back Boring: Designed for seamless integration into multi-tasking CNC centers, Swiss-type automatic lathes, or dual-spindle setups requiring left-hand feed directions.
- Micro-Bore Profiling & Pocketing: Perfect for machining narrow valve components, custom medical connectors, and small bearing bushings where clearance is critical.
- Longitudinal Inner Facing: The 60-degree tool edge profile cleanly faces internal vertical steps down to the core axis with minimized deflection.
5. Compatibility & Equipment Interface
This 10mm round-shank boring bar fits directly into standard CNC lathe turret blocks, micro boring bar sleeves, split bushings, or Swiss-turn gang plates. It interfaces seamlessly with precision CNC lathe systems and automated turning setups from leading global brands (including Haas, Mazak, Citizen, Star, Tsugami, Doosan/DN Solutions, Mori Seiki, Okuma, and Fanuc). Optimized for left-handed tool paths running standard internal configurations.
6. BEYOND Premium Substrate & Grade Selection Matrix
To maximize chip control and wear life, pair your S10K-STWCL09 boring bar with the corresponding BEYOND proprietary insert grade tailored to your target material:
- BYM11 Grade (PVD Nano-Coated): Exceptional thermal shock resistance. Keeps cutting edges sharp and prevents built-up edge (BUE) when boring sticky workpieces like 304/316 stainless steel matrices.
- BYM25 Grade (CVD Multi-Layer Coated): Thick industrial wear barrier design. Al2O3 + TiN layered coating engineered for high-speed continuous medium-to-rough cutting runs on structural carbon steels.
- BYK15 Grade (Hardened Micro-Grain Substrate): Highly abrasion-resistant micro-grain layout, 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 S10K-STWCL09 holder passes strict Coordinate Measuring Machine (CMM) checking procedures to guarantee insert pocket dimensional accuracy within ±0.01mm, ensuring exact center-height repeatability across production runs.
Global Machinist Field Reports:
We run this left-hand bar on our dual-spindle lathe for secondary operations. Rigidity is excellent for a 10mm steel shank, and the pocket matches our TCMT09 inserts flawlessly.
Der Halter läuft bei uns täglich in der Kleinserienfertigung. Extrem präzise gearbeiteter Plattensitz, die Schraube klemmt absolut bündig. Späne fließen perfekt ab.
Perfect structural alignment inside our tight bores. Using the 9mm insert size gives extra clearance inside holes under 15mm. Very happy with the build quality.
複合加工機の背面主軸用に購入。10mmシャンクでも剛性がしっかりしており、内径ボーリング時のビビリがほぼ出ません。TCMT09チップのホールド感も非常に安定しています。
We swapped out expensive OEM holders for these BEYOND bars. Tolerances are exactly the same. Center-height is perfectly predictable after every index.
8. Frequently Asked Questions (AI & Search Engine Optimized)
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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.