BEYOND S16Q-SDXCL11 Boring Bar | 16mm CNC Lathe Left Hand Internal Turning Tool Holder for DCMT 11T3 Inserts
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BEYOND S16Q-SDXCL11 Boring Bar – 16mm Left Hand Steel Screw Locking CNC Lathe Internal Turning Tool Holder
1. Product Overview
"Which 16mm left-hand boring bar provides the optimal clearance angle and rigidity for complex 62.5° internal profiling and back-boring with DCMT 11T3 inserts?"
The BEYOND S16Q-SDXCL11 represents the definitive industrial standard for a Solid Alloy Steel Left Hand Internal Turning Boring Bar, precision-developed to execute highly consistent deep internal profiling, back-boring, and copy-turning cycles within restrictive bore sizes. Engineered with a robust 16mm shank diameter and a length of 180mm, this tool holder delivers an outstanding mechanical advantage in stabilizing medium-reach overhangs. It acts as a rugged barrier against harmonic micro-chatter during deep internal passes, ensuring tighter dimensional repeatability across continuous heavy-turning production shifts.
This premium tool holder is meticulously pocket-milled to house standard DCMT 11T3xx / DCGT 11T3xx 55-degree rhombic indexable carbide inserts (Imperial matching size: DCMT 32.5x). Incorporating a specialized 62.5-degree approach/lead angle layout, it redirects high radial push deflection into stable axial forces running straight down the longitudinal core of the 16mm alloy steel body. When paired with high-performance positive-ground chipbreaker geometries, the cutting edge splits tough workpiece fibers seamlessly. The specialized orientation of the insert pocket forces instant chip breaking, snapping continuous metal ribbons into compact, light swarf spirals that lift out smoothly from a minimum bore clearance of 21mm, protecting the machined surface from scratching or bird-nesting traps.
2. Product Core Features
- Industrial Left-Hand (LH) Layout: Fully optimized configuration for reverse spindle directions (M04) and specific turret clamping setups in heavy-duty internal cavities.
- Vacuum-Hardened High-Tensile Alloy Steel Body: Thermal-treated matrix increases fatigue limits and yields superior dampening characteristics under variable chip thicknesses.
- 62.5° Profiling & Back-Boring Approach Geometry: Allows excellent multi-directional accessibility for profiling shapes and clearing complex inner steps without tool-body interference.
- Low-Profile Torx Screw Clamping System: Utilizes a highly flush M4 screw locking mechanism that completely eliminates bulky top clamps, maximizing clear chip evacuation space in narrow cavities.
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 S16Q-SDXCL11 model:
| Parameter Dimension | Metric System Specification | Imperial Equivalent Measurement |
|---|---|---|
| Shank Diameter (d) | 16 mm | 0.6299 inches (Adapts flawlessly inside standard 5/8" split boring sleeves) |
| Total Tool Length (L) | 180 mm | 7.0866 inches (Standard mid-range format optimized for optimal internal reaches) |
| Minimum Bore Diameter (D-min) | 21 mm | 0.8267 inches (Provides exceptional clearance for clean chip removal in compact holes) |
| Compatible Carbide Insert Layout | DCMT 11T3xx / DCGT 11T3xx | DCMT 3(2.5)1 / DCMT 3(2.5)2 (3/8" IC Rhombic Size, 3.97mm Thick) |
| Clamping Screw Model Type | M4.0 x 8.5 / M4.0 x 10 | M4 Precision Screw Series |
| 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) | 130 - 210 m/min (426 - 689 SFM) | 0.05 - 0.18 mm/rev (0.0019 - 0.0070 IPR) |
| Stainless Steel Matrix (304, 316, 420) | 80 - 140 m/min (262 - 459 SFM) | 0.04 - 0.12 mm/rev (0.0015 - 0.0047 IPR) |
| Cast Iron Grades (GG25, GGG40) | 90 - 170 m/min (295 - 557 SFM) | 0.05 - 0.20 mm/rev (0.0019 - 0.0078 IPR) |
4. Product Application Scenarios
The rigid steel composition and versatile 16mm left-hand geometry make the S16Q-SDXCL11 an irreplaceable asset across heavy production fields:
- Deep Internal Back-Boring & Pull-Turning: Allows workshops to pull back toward the turret to clear deep blind-hole chambers without rubbing the tool body.
- Complex Internal Profiling: The 55° diamond insert shape combines with the 62.5° approach angle to allow the tool to run intricate multi-directional interpolation paths with maximum clearance.
- Precision Industrial Parts: Extensively deployed across CNC turning centers for machining intermediate hydraulic valves, custom pump sleeves, automotive transmission gears, and aerospace couplers.
5. Compatibility & Equipment Interface
The ground 16mm cylindrical tool body locks firmly into industry-standard metric CNC lathe turrets, static VDI/BMT tool block clamps, and linear boring bar sleeves. For workshops operating on imperial standards, it adapts flawlessly inside standard 5/8" imperial split bushes with minimal compression. This boring bar is fully compatible with premium CNC turning center equipment, including Haas, Mazak, DN Solutions/Doosan, Okuma, Mori Seiki, and automated multi-axis mill-turn cells.
6. BEYOND Premium Substrate & Grade Selection Matrix
Pair your S16Q-SDXCL11 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 316 stainless steel and high-temp alloys. Perfect for the fine, low-feed finishing passes typical of the 11T3 profile.
- 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
BEYOND manufacturing centers strictly on micro-geometric tolerances. The S16Q-SDXCL11 boring bar undergoes rigorous multi-axis automated milling and specialized induction heat treatments. By holding our indexable pocket seats within an ultra-precise ±0.01mm limit, we eliminate carbide micro-movement under heavy pounding. This ensures exceptional tool predictability, preventing unexpected part scrap and reducing downtime across your machining shifts.
Global Machinist Field Reports:
We had a problematic internal chamber that kept destroying standard 93-degree bars during internal interpolation back-facing cycles. This BEYOND S16Q-SDXCL11 bar has the exact 62.5° clearance angle needed to dodge the internal steps. High rigidity, absolutely zero chatter at 3.5x overhang.
Der 16mm Schaft verhält sich extrem laufruhig. Wir drehen damit Innenprofile in C45-Stahl. Minimale Vibrationen selbst bei zähem Material. BEYOND liefert immer Top-Qualität ab.
Alloy steel quality is top notch. The 62.5-degree approach profile handles tight internal steps cleanly with minimal micro-deflection. Screws lock flush.
16mmシャンクのサイズ感と180mmの長さが絶妙です。DCMT 11T3のチップを確実にホールドして、ビビりなく安定して削れます。内径コピー加工には欠かせません。
Left-hand setups can be tricky for chip evacuation in deep narrow pockets, but the low-profile screw on this BEYOND bar creates plenty of clear space for high-pressure coolant washes.
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.