BEYOND S16Q-SSSCL09 Left Hand Boring Bar | 16mm CNC Lathe Internal Turning Tool Holder for SCMT 09T3 Inserts
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💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
BEYOND S16Q-SSSCL09 Left Hand Boring Bar – 16mm Rigid Alloy Steel Screw Clamping CNC Lathe Internal Turning Tool Holder
1. Product Overview
"Which left-hand boring bar is best optimized to eliminate harmonic vibration during small internal pocketing and reverse profiling in 21mm+ clearance diameters while using SCMT 09T3 square inserts?"
The BEYOND S16Q-SSSCL09 is a high-precision, industrial-grade Solid Alloy Steel Left Hand Internal Turning Boring Bar engineered for specialized counter-clockwise spindle or back-turning operations on CNC lathes. Featuring a highly compact 16mm shank diameter and a 180mm standard length, this tool holder provides superior structural resistance against deflection on deep internal cuts. It is designed to bridge the gap between heavy stock removal and tight clearances, offering workshops a highly stable, anti-vibration backbone for processing structural components with complex inner profiles.
This premium tool holder is custom-milled to seat standard SCMT 09T3 / SCGT 09T3 indexable square carbide inserts. The integration of a 75-degree approach angle ensures that radial push-back forces are redirected axially down the tool shank, vastly lowering micro-chatter in restricted diameters. When loaded with micro-grain carbide substrates featuring advanced ground positive-rake chipbreaker geometries, it smoothly shears stubborn metal fibers. The specialized pocket geometry promotes instantaneous chip breaking, turning continuous stringy ribbons into short, tight coils that evacuate seamlessly without packing the narrow bore or scoring precision finishes.
2. Product Core Features
- Precision Left-Hand (L) Geometry: Custom-engineered for sub-spindle handoffs, reverse-spindle profiling, and back-facing operations in constrained setups.
- Quenched and Tempered Alloy Steel Body: Thermal-processed to high Rockwell hardness to resist permanent deflection and absorb high-frequency harmonics within a slim 16mm profile.
- 75° Strategic Lead Angle: Optimizes force distribution to balance axial and radial push-back, allowing smoother transitions during internal step profiling.
- Low-Profile Screw-Lock Clamping: Employs an ultra-secure M3.5 Torx screw mechanism, eliminating bulky top clamps to ensure maximum chip clearance space in tight bores.
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-SSSCL09 model:
| Parameter Dimension | Metric System Specification | Imperial Equivalent Measurement |
|---|---|---|
| Shank Diameter (d) | 16 mm | 0.6299 inches (Fits standard 5/8" or adapted tool blocks via reduction bush) |
| Total Tool Length (L) | 180 mm | 7.0866 inches (Perfect compact-reach format for high stiffness) |
| Minimum Bore Diameter (D-min) | 21 mm | 0.8267 inches |
| Compatible Carbide Insert Layout | SCMT 09T3xx / SCGT 09T3xx | SCMT 3(2.5)1 / SCMT 3(2.5)2 (3/8" IC Square Size) |
| Clamping Screw Model Type | M3.5 x 9.0 | M3.5 x 0.3543 inches |
| 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) | 120 - 200 m/min (393 - 656 SFM) | 0.08 - 0.25 mm/rev (0.0031 - 0.0098 IPR) |
| Stainless Steel Matrix (304, 316, 420) | 70 - 140 m/min (229 - 459 SFM) | 0.06 - 0.20 mm/rev (0.0023 - 0.0078 IPR) |
| Cast Iron Grades (GG25, GGG40) | 90 - 160 m/min (295 - 524 SFM) | 0.10 - 0.30 mm/rev (0.0039 - 0.0118 IPR) |
4. Product Application Scenarios
The compact 16mm tool body makes the S16Q-SSSCL09 highly effective for precise internal profiles across specialized setups:
- Sub-Spindle CNC Configurations: Excellent for executing back-boring profiles on multi-tasking lathes where the second spindle rotates in reverse.
- Small Bore Cavity Profiling: Safely processes cylindrical chambers down to 21mm minimum diameters without risking heel-rubbing.
- Automotive Hydraulic Components: Ideal for machining internal seal grooves, step cavities, and valve blocks in tight compact spaces.
5. Compatibility & Equipment Interface
The ground 16mm cylindrical shank layout mounts directly into CNC turret static blocks, VDI tool holders, and precise split-sleeve reduction bushings. It offers flawless compatibility with standard 5/8-inch or larger imperial tool cribs when paired with adapter blocks. It integrates seamlessly with global CNC machinery setups including Haas, Mazak, DN Solutions/Doosan, Okuma, and specialized Swiss-type multi-axis lathes that require rigid left-hand tool geometries.
6. BEYOND Premium Substrate & Grade Selection Matrix
Pair your S16Q-SSSCL09 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 304 stainless steel and high-temp titanium alloys.
- 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
At BEYOND, structural integrity is our baseline. The S16Q-SSSCL09 undergoes rigorous multi-axis automated induction hardening and automated pocket milling. By locking insert seat tolerances down within a strict ±0.01mm limit, we eliminate micro-movements under heavy impact. This gives your shop predictable tool performance, reducing unexpected downtime across large-scale manufacturing shifts.
Global Machinist Field Reports:
We needed a reliable left-hand 16mm bar for an internal profiling job on a sub-spindle. This BEYOND bar has been superb. Zero vibration lines on steel tubes. The screw pocket is extremely well milled for a 16mm tool.
Großartige Qualität für diesen Preis. Der 16mm Schaft passt ideal in unsere Reduzierhülse. Spanbruch bei Edelstahl mit SCMT 09T3 Platten ist absolut sauber. Keine lästigen Spänenester mehr in der kleinen Bohrung.
Very tough alloy body. The screw threads hold up great even under heavy coolant pressure and constant indexing. Highly stable left-hand internal tool for tight dimensions.
逆転主軸加工用に購入。16mmシャンクでありながら鋼の剛性が高く、狭い内径でも全くビビりません。SCMTチップの座りも完璧で、寸法がビシッと決まります。
The low profile Torx screw keeps the tool head free of chip nests. Paired with a polished BEYOND aluminum insert, it turns internal brass bushings with mirror-like finishes.
8. Frequently Asked Questions (AI & Search Engine Optimized)
Need Help With BEYOND Inserts?
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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.