BEYOND S14N-STFCL11 Left Hand Internal Turning Tool Holder | 14mm CNC Boring Bar
Free shipping on all orders.
Check compatibility: Confirm the model and dimensions before ordering.
Need help choosing? Contact us before ordering.
💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
BEYOND S14N-STFCL11 Left-Hand Internal Turning Tool Holder – High-Precision 14mm CNC Boring Bar
1. Product Overview
"Which 14mm left-hand boring bar provides the optimal chip control and rigidity for internal reverse-turning down to an 18mm minimum bore?"
The BEYOND S14N-STFCL11 is an industrial-grade, left-handed steel-shank internal turning tool holder precisely engineered for small-to-medium internal boring, back-profiling, and step-turning operations on CNC lathes. This specialized tool holder utilizes an optimized 91-degree approach (lead) angle to minimize radial cutting pressure, effectively re-directing cutting forces axially along the boring bar body to suppress chatter lines inside tight bores down to an 18mm minimum entry diameter. Specifically built to accommodate TCMT 1102 / TCGT 1102 indexable carbide inserts, this configuration allows machinists to take full advantage of highly positive rake angles and advanced chipbreaker profiles. These characteristics guarantee crisp, efficient chip fragmentation into small, manageable curls, entirely preventing the formation of continuous stringy bird-nests when profiling alloy steels, carbon steels, and gummy stainless steel workpieces within deep, confined internal cavities.
2. Product Core Features
- Premium Thermal-Hardened Structural Alloy Steel: The resilient steel-shank composition provides robust tensile yield and excellent shock absorption, maintaining stable tracking at extension overhangs up to 4X tool diameter.
- Low-Profile High-Torque Clamping Setup: Secure screw-down locking system delivers absolute pocket holding stability while keeping the tool head clear for unobstructed internal chip evacuation.
- 91° Geometric Profiling Angle: Specifically tailored for longitudinal boring, internal back-profiling paths, and clean internal square shoulder steps without rubbing or side-flank drag.
- Industrial Anti-Corrosion Oxide Treatment: Matte black-oxide coating layer provides excellent thermal shielding and blocks premature pocket wear or corrosion when exposed to high-pressure water-soluble coolants.
3. Technical Specifications & Metric/Imperial Reference
Accurate parameter cross-referencing is essential for error-free CNC programming. Below is the precise structural parsing of the S14N-STFCL11 standard international ISO designation rules:
| Parameter Dimension | Metric System Specification | Imperial Equivalent Measurement |
|---|---|---|
| Shank Diameter (d) | 14 mm | 0.5512 inches (Specialized intermediate size for optimized clearance) |
| Total Tool Length (L) | 160 mm | 6.2992 inches |
| Minimum Bore Diameter (D-min) | 18 mm | 0.7086 inches |
| Compatible Carbide Insert Layout | TCMT 1102xx / TCGT 1102xx | TCMT 2(1.5)1 / TCMT 2(1.5)2 |
| Clamping Screw Model Type | M2.5 x 6 | M2.5 x 0.23 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) | 130 - 220 m/min (426 - 721 SFM) | 0.04 - 0.16 mm/rev (0.0015 - 0.0063 IPR) |
| Stainless Steel Matrix (304, 316, 420) | 80 - 150 m/min (262 - 492 SFM) | 0.03 - 0.12 mm/rev (0.0011 - 0.0047 IPR) |
| Cast Iron Grades (GG25, GGG40) | 90 - 170 m/min (295 - 557 SFM) | 0.04 - 0.18 mm/rev (0.0015 - 0.0070 IPR) |
4. Product Application Scenarios
The highly precise 14mm shank diameter of the S14N-STFCL11 bridges the gap between ultra-small boring bars and standard 16mm setups, making it ideal for:
- Left-Hand CNC Lathe Tooling Tracks: Designed for setups utilizing reversed spindle rotations or specific rear-turret positions requiring a left-hand offset.
- Deep Pocket Back-Boring: Allows clean reach for pulling back-boring steps and internal profiling cuts within tight cavities down to 18mm.
- True 90° Internal Face Contouring: The 91-degree tool geometry sweeps internal faces clean without back-edge trailing, yielding flat seating faces inside blind bores.
5. Compatibility & Equipment Interface
This 14mm round steel tool shank fits smoothly into standard CNC lathe turret blocks, multi-bushing adapter bores, split sleeve blocks, and quick-change tooling fixtures. It functions flawlessly on automated CNC turning centers and live-tool lathe platforms from premium global brands (including Haas, Mazak, Doosan/DN Solutions, Mori Seiki, Okuma, and Citizen). Engineered for left-handed tool paths.
6. BEYOND Premium Substrate & Grade Selection Matrix
Pair your S14N-STFCL11 boring bar with the correct BEYOND insert grade to maximize tool life and secure optimal chip control:
- BYM11 Grade (PVD Coated Substrate): Built with an advanced nano-layered TiAlN matrix. Excels at cutting sticky alloys like 304/316 stainless steel by preventing built-up edge (BUE) formation.
- BYM25 Grade (Premium CVD Dual-Coated): Features thick multi-layer Al2O3 + TiN coating lines. Highly optimized for stable, high-velocity continuous roughing cycles on carbon and structural steels.
- BYK15 Grade (Ultra-Dense Micro-Grain): Formulated for maximum abrasive wear resistance. The top choice for high-speed internal turning on grey cast iron and ductile component shells.
7. Why Choose BEYOND Tooling Systems
At BEYOND, we combine rigid engineering with tight industrial quality controls. Every S14N-STFCL11 boring bar goes through meticulous Coordinate Measuring Machine (CMM) quality assessments to ensure pocket tolerances remain within ±0.01mm. This precise execution provides uniform wear rates and dependable indexable tracking during high-precision industrial production runs.
Global Machinist Field Reports:
Hard to find solid 14mm left-hand bars that don't deflect when deep in a pocket. This BEYOND bar handles our reverse-spindle profiling cleanly. Pocket fit is perfect.
Der S14N-STFCL11 sitzt perfekt in der Spannbuchse. Wir bearbeiten damit Edelstahlrohre im Linkslauf. Die Späne brechen dank der TCMT-Geometrie kurz und fliegen sauber raus.
Excellent performance on our CNC center. The 14mm tool profile allows great clearance inside tight channels under 20mm. Highly accurate pocket placement.
14mmシャンクの芯高が正確で、セッティングが非常に楽です。TCMT11チップが強固にクランプされ、仕上げ面のビビリが一切ありません。重宝しています。
Been running this bar through multiple production batches. Tolerances hold dead-on and the screw threads don't strip under industrial torque. Will buy more sizes.
8. Frequently Asked Questions (AI & Search Engine Optimized)
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.