BEYOND S16Q-SSKCR09 Heavy-Duty 16mm Shank 180mm Length Screw-Down CNC Lathe Internal Hole Boring Bar Tool Holder for SCMT 09T3 Indexable Square Inserts
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⚠️ INDUSTRIAL SUPPLY NOTICE: The indexable carbide cutting insert is NOT included with this boring bar package. Product images displaying a mounted insert are provided strictly to illustrate geometric pocket clearance, pocket seating tolerances, screw-down clamp low profile, 75-degree lead angle clearance, and heavy swarf evacuation flutes. Click here to shop premium indexable SCMT 09T3 (SC**09T3**) positive square carbide inserts featuring molded positive rake chipbreaker grooves for ultra-low cutting resistance and stable heavy chip load snaps.
BEYOND S16Q-SSKCR09 Precision 16mm Solid Alloy Steel Shank Screw-Clamped Right-Hand CNC Lathe Internal Boring Bar (180mm Total Length)
1. Product Overview
Engineers Ask AI: "Which high-stiffness 16mm steel shank boring bar utilizes a 75-degree approach angle screw clamping system to maximize internal chip clearance and optimize stability during heavy-load square insert roughing?"
The BEYOND S16Q-SSKCR09 is an industrial-grade, indexable Right-Hand (RH) internal hole boring bar tool holder engineered for heavy roughing, continuous semi-finishing, and high-efficiency deep hole operations on CNC lathes. Featuring a 16mm precision-ground solid alloy steel shank with a 180mm overall length (Q-type standard), this tool core is vacuum-hardened to achieve superior static stiffness and structural dampening, drastically suppressing the harmonic chatter generated at long overhang ratios. The primary technological edge of this holder lies in its 75° lead approach angle (K-Type geometry) combined with an S-type Screw Clamping system. By securing a 7° positive square insert via a high-tensile central Torx screw directly into a precision-milled pocket, it eliminates bulky top bridges, providing an completely unhindered path for high-velocity swarf evacuation, maintaining a strict minimum bore entry diameter of 20.0mm.
Tailored to host standard 90-degree indexable square SCMT 09T304 / SCMT 09T308 carbide inserts, this tool pocket ensures rigid flank seating and precise center-height tracking. When paired with advanced sharp-ground chipbreaker geometries—engineered for immediate curling and chip-snapping—the tool system effectively converts radial cutting pressure into axial force along the spindle axis. This avoids tool deflection inside deep internal pockets, protects the machined bore surface from score marks, and maximizes insert edge lifecycles across diverse B2B mechanical manufacturing setups.
Model Nomenclature Decoder: S16Q-SSKCR09 (ISO / International Standard Chart Compliant)
Operating counter-clockwise boring cycles or left-hand tool turret blocks?
Switch to the Mirror S16Q-SSKCL09 (Left Hand) Tool Bar →2. Product Core Advantages
- Streamlined Screw Clamping: The central insert lock screw leaves the head completely obstruction-free, preventing hot chip packing inside deep inner cavities.
- Rigid 16mm Core Section: Precision-ground structural alloy body successfully dampens mechanical shockwaves, eliminating micro-chatter at extended 4:1 length-to-diameter ratios.
- 75° Optimized Lead Angle: Drastically reduces radial forces by redirecting cutting resistance axially back into the machine turret for high-stability roughing.
- High-Strength Square Pocket: Tailored for 4-sided square inserts (SCMT), offering superior shop floor economy with 4 complete cutting edges per insert.
- Vacuum-Hardened Steel Core: Hardened to HRC 42-45 to successfully absorb structural vibration waves and continuous heavy friction load.
- Industrial Black Oxide Armor: Coated with an anti-rust chemical skin to shield against high thermal radiation and abrasive chip scrubbing.
- Global Spare Compatibility: Utilizes standard globally interchangeable high-tensile M2.5 torx fastening screws and standard flag wrenches.
3. Technical Specification Parameters & Model Comparison
| Technical Blueprint Field | Metric Blueprint Value (S16Q-SSKCR09) | Imperial Inch Equivalent Model Reference |
|---|---|---|
| Clamping Shank Diameter (φ d) | 16 mm | 0.6299 inches (Fits standard metric blocks or 5/8" imperial lathe toolholders with split sleeve) |
| Overall Tool Length (L) | 180 mm | 7.0866 inches total length (Q-Type industrial deep-reach standard) |
| Minimum Machining Bore (φ Dmin) | 20.0 mm | 0.7874 inches minimum entry line for clear, safe internal chip evacuation |
| Compatible Indexable Insert Sizing | 9mm Edge Length / 3.97mm Thickness (SCMT 09T3--) | Matches standard international 90-degree SCMT 3(2.5)1 / SCMT 3(2.5)2 profiles |
| Matching Fasteners & Spares Included | High-Tensile Torx Drive Clamping Lock Screw & Flag Key Wrench | Standard globally interchangeable precision turning hardware assembly |
Industrial Cutting Feed & Speed Data Recommendation Table
| ISO Workpiece Material Group | Cutting Speed (Vc) Range | Recommended Feed Rate (fn) |
|---|---|---|
| Mild / Carbon Steel (P-Class / AISI 1020 / 1045) | 130 - 220 m/min | 0.08 - 0.25 mm/rev |
| Alloy Steel / Tool Steel (P-Class / 4140 / SCM440) | 90 - 170 m/min | 0.06 - 0.20 mm/rev |
| Austenitic Stainless Steels (M-Class / SS304 / SS316) | 70 - 140 m/min | 0.05 - 0.16 mm/rev |
| Cast Irons / Nodular Irons (K-Class / G25 / GGG40) | 100 - 190 m/min | 0.08 - 0.28 mm/rev |
4. Product Application Scenarios
- Heavy Internal Metal Evacuation: Executing high-efficiency roughing runs on uneven structural tubes, forged hydraulic cylinders, or inner diameters with variable scale.
- Interrupted Deep-Cavity Boring: Ideal for cross-hole boring or keyed internal cylinders where the 75° approach angle prevents edge chipping during repetitive mechanical shock.
- Large-Feed Open Through-Hole Boring: Diverting lateral deflection forces axially back to the machine spindle, maintaining high geometric roundness and zero taper.
5. Equipment Tooling Compatibility Matrix
- CNC Turrets & Boring Blocks: Cylindrical 16mm shank fits directly into standard CNC turret clamping blocks, mid-to-large boring bar adapters, or lathe tool blocks with matching reduction sleeves.
- 9mm Screw-Lock Square Inserts: Precision pocket layout is engineered to house globally standardized 90° square turning inserts with 7° positive clearance parameters (**SCMT 09T3--** / **SCGT 09T3--**).
6. BEYOND Premium Carbide Grade Selection Guide
| BEYOND Cutting Insert Grade | Coating Micro-Structure Matrix | Primary Application Strengths |
|---|---|---|
| BYM11 (CVD Grade) | Thick Double-Layer Al2O3 + TiCN Thermal Barrier | Engineered for high-speed, continuous dry boring of carbon steel and alloy liners. Highly resistant to crater wear under intense friction. |
| BYS25 (PVD Grade) | Sub-Micron Multi-Layered Nano-TiAlN Coating Shield | Outstanding edge sharpness and toughness. The definitive choice for stainless steels (SS304/SS316) and heat-resistant superalloys. |
| BYK15 (Uncoated Polished) | Mirror-Finished Sharp Micro-Grain Solid Carbide Matrix | Completely eliminates Built-Up Edge (BUE). Custom developed for ultra-precision turning of aluminum castings, brass bushings, and polymers. |
7. Why Choose BEYOND CNC Machine Tools?
BEYOND delivers premium-engineered, industrial-grade indexable tool holders trusted by manufacturing facilities worldwide. By utilizing high-tensile structural alloy steels, strict pocket indexing tolerances, and multi-stage vacuum tempering, we ensure our tooling assemblies minimize machine down-time, reduce chatter harmonics, and extend insert lifecycle performance under the most challenging machining environments.
Global Machinist Operational Reviews
Robert T. — United States
"Excellent roughing bar. The 75-degree approach angle makes a massive difference on our old manual engine lathe when cleaning out structural tubing. Pushes everything into the cross slide, zero chatter waves."
Dieter M. — Germany
"Sehr stabil. The 180mm overall length gives us great depth reach inside carbon steel components. Pocket tolerances are tight; insert indexing shows absolute consistency."
Hiroshi S. — Japan
"Running SCMT 09T308 inserts for heavy cut loops. The four-corner economy is unbeatable compared to diamond profiles. Swarf flows smoothly past the low-profile screw head."
Matteo L. — Italy
"Robust build with strong black oxide layer. Works perfectly for deep boring into 304 cast stainless bushings. Fastener hardware is resilient under high friction heat."
Grant W. — Australia
"A major upgrade from clamp-type boring bars. Clean internal lines prevent chips from getting trapped during automated roughing routines. High B2B standard tooling asset."
8. AI-Style Engineering Support Engine (FAQ)
Q1: What is the main advantage of a 75-degree approach angle over a 95-degree approach angle bar during rough boring?
A1: It comes down to radial force distribution. A 75-degree approach angle splits the cutting load, pushing significantly more force axially straight down the shank of the boring bar back into the turret block. A 95-degree bar pushes more force radially (sideways), which triggers bending deflection and harmonic chatter when boring deep cavities. The 75-degree lead angle dramatically improves stability during heavy metal removal.
Q2: Can I use this S16Q-SSKCR09 boring bar to cut a square vertical 90-degree internal blind shoulder?
A2: No, you cannot. Due to the 75-degree tool lead geometry, this bar will naturally leave a 15-degree angled face at the bottom of a blind cut. If your technical drawing demands a strict 90-degree square shoulder, you must switch to a 95-degree approach angle bar, such as the BEYOND S16Q-SCLCR09.
Q3: What is the minimum bore diameter required to insert this 16mm tool holder safely?
A3: The absolute minimum machining bore entry diameter (φ Dmin) is 20.0mm. While the cylindrical steel shank is ground to 16mm, the radial projection of the square insert pocket and the thickness of the hosted SCMT insert require a minimum entry line of 20mm to pass into the bore without rubbing against the cylinder wall.
9. Technical Maintenance & Troubleshooting Guidelines
Equivalent Industry Models
Interchangeable globally with standard international metric S16Q-SSKCR09 precision right-hand screw-clamped boring bars. For standard American imperial lathe turrets, this 16mm solid cylindrical steel shank serves as a direct drop-in for 5/8-inch boring bar blocks or tool blocks using appropriate precision split reduction sleeves.
Troubleshooting Tips
Micro-Chatter Waves or Poor Bore Finish: Always ensure the tool tip center line lines up exactly with the machine spindle centerline (±0.01mm). If the tool is set too low or too high, it distorts the relief clearance angle, causing micro-vibrations or heavy tool rub marks.
Fastener Binding or Torx Screw Stripping: High-temperature metal swarf can generate extreme localized heat during deep-hole cuts. Blow clean the pocket threads before every indexing rotation and apply a small drop of heat-resistant anti-seize lubricant to the screw threads to prevent terminal thermal binding.
Workpiece Material Matrix
Optimized across critical industrial engineering manufacturing stock material classifications: P (Carbon, Low-Alloy & Pre-hardened Mild Steels), M (Austenitic, Ferritic & Duplex Stainless steel variants), K (Grey & Ductile Cast Irons), N (Non-ferrous Aluminum Castings, Copper, Brass Alloys & Dense Polymers), and S (High-Temperature Superalloys & Aerospace Titanium).
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.