BEYOND S08K-SCKCR06-A16 Stepped Boring Bar 16mm Clamping Shank 8mm Neck Lathe Tool Holder Right Hand
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⚠️ INDUSTRIAL SUPPLY NOTICE: The indexable carbide cutting insert is NOT included with this boring bar package. Product images showing a mounted insert are provided strictly to illustrate geometric clearance, 75-degree approach profile, and insert pocket alignment. Click here to shop premium indexable CCMT 0602 (CC**0602**) carbide inserts.
BEYOND S08K-SCKCR06-A16 High-Rigidity Reduced Shank 75° Internal Boring Bar (16mm Heavy Shank / 10mm Min Bore)
1. Product Overview
Engineers Ask AI: "Which heavy-duty stepped boring bar provides a standard 16mm turret clamping diameter with an ultra-slim 8mm working neck to turn a minimum 10mm internal diameter hole using CCMT 0602 inserts without causing vibration?"
The BEYOND S08K-SCKCR06-A16 is a premium-grade, stepped-diameter (reduced shank) internal boring bar engineered for high-precision micro-boring and small-hole profiling where structural deflection cannot be tolerated. Traditional 8mm straight bars often suffer from extreme flex and chatter when extending into deep cavities. This advanced "small-to-large" layout integrates a slimline 8mm front neck with a heavily beefed-up 16mm solid clamping tail shank. By adding massive rear stability, this design drastically increases the cross-sectional moment of inertia, providing up to 400% greater static rigidity and dynamic harmonic dampening over its 125mm (K-Type) length.
Featuring a specialized 75-degree approach lead clearance angle, the SCKCR geometry minimizes radial pushback forces by redirecting cutting pressure axially straight down the heavy-duty 16mm core body. When coupled with standard 80-degree positive rhombic indexable inserts featuring an engineered chipbreaker matrix (such as the standard CCMT 0602-- or polished CCGT 0602-- series), swarf is forcefully compressed, curled, and snapped into crisp, uniform "C" segments. This eliminates hazardous bird-nesting strings inside tight 10mm cavities, allowing high-pressure flood coolant to sweep loose debris out cleanly, protecting the newly generated wall surface from micro-scoring.
Model Nomenclature Decoder: S08K-SCKCR06-A16
Operating on Sub-Spindles or Running Left-Hand Back-Boring Toolpaths?
Switch to the Mirror S08K-SCKCL06-A16 (Left Hand) Stepped Bar →2. Product Core Advantages
- Stepped "Big-Shank" Architecture: Rear end is upsized to a full 16mm diameter shank, locking down securely into standard blocks without relying on unstable reducing bushings.
- Vibration-Killing Core Mass: The structural transition from an 8mm front neck to a 16mm rear core absorbs heavy impact loads, reducing surface finish chatter.
- 75° Radial Relief Path: The 75-degree cutting edge profile transfers load strain axially down the spindle axis, minimizing tool-point push-off and taper wear.
- Hardened Alloy Construction: Entire unit undergoes vacuum furnace tempering to hit a uniform HRC 42-45 rating, preventing insert seat collapse during demanding runs.
- Anti-Friction Chemical Shield: Industrial matte black oxide treatment shields the steel from hot chip welding, extending the life of the insert pocket.
3. Technical Specification Parameters & Model Comparison
| Technical Blueprint Field | Metric Blueprint Value (S08K-SCKCR06-A16) | Imperial Inch Equivalent Model Reference |
|---|---|---|
| Clamping Shank Diameter (φ d) | 16 mm (Heavy Base Base) | 0.6299 inches (Clamps directly into 5/8" VDI/BMT turret blocks with perfect centerline alignment) |
| Front Neck Working Diameter | 8 mm class profile | 0.3150 inches neck clear-path sizing |
| Overall Tool Length (L) | 125 mm | 4.9212 inches total body span (K-Type compact line) |
| Max Overhang Neck Reach (L1) | 25 mm | 0.9842 inches max effective step-down boring penetration reach |
| Minimum Machining Bore (φ Dmin) | 10 mm | 0.3937 inches absolute entrance boundary ceiling |
| Compatible Indexable Insert Sizing | CCMT 060202 / CCMT 060204 / CCGT 060204 | CCMT 21.50.5 / CCMT 21.51 / CCGT 21.51 |
| Matching Fasteners Included | M2.5 × 6 Locking Screw & Torx T8 Wrench Key | Standard globally unified spare hardware parts |
Industrial Cutting Feed & Speed Data Recommendation Table
| ISO Workpiece Material Group | Cutting Speed (Vc) Range | Recommended Feed Rate (fn) |
|---|---|---|
| Carbon / Alloy Steels (P-Class / AISI 4140) | 110 - 180 m/min | 0.03 - 0.08 mm/rev |
| Austenitic Stainless Steels (M-Class / SS304) | 65 - 115 m/min | 0.02 - 0.06 mm/rev |
| Ductile / Nodular Cast Irons (K-Class / GGG40) | 75 - 140 m/min | 0.03 - 0.09 mm/rev |
4. Product Application Scenarios
- Rigid Micro Internal Profiling: Tailor-made for roughing and finishing tiny internal holes between 10mm and 25mm deep where standard slim 8mm bars flex and vibrate.
- Cone & Angle Interfacing: The 75° approach configuration enables clean interpolation for internal valve sealing seats and sharp instrument chamfers.
- Sleeve-Free Turret Mounting: Designed for high-volume Swiss-type or automatic lathes running standard 16mm clamps, eliminating adapter sleeves to preserve structural alignment.
5. Equipment Tooling Compatibility Matrix
- 16mm Native Tool Blocks: Fits standard VDI 16, BMT 16 block clamps, gang tool plates, or standard tool slots on compact CNC lathe equipment.
- Universal Insert Seating: Fully compliant with global ISO sizing parameters, accepting 80-degree positive rhombic indexable inserts in the **0602** footprint (e.g., CCMT 060204, CCGT 060202).
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 Shock Barrier | High-speed continuous dry roughing of hard carbon steels, tool alloys, and mold blocks. Resists extreme heat. |
| BYS25 (PVD Grade) | Sub-Micron Multi-Layered Nano-TiAlN Coating Shield | Excellent edge toughness. Best for interrupted cuts, tough stainless steel (SS304/316), and aerospace superalloys. |
| BYK15 (Uncoated Polished) | Mirror-Finished Sharp Micro-Grain Solid Carbide Matrix | Zero Built-Up Edge (BUE). Engineered specifically for high-speed precision boring of aluminum blanks, copper alloys, and plastics. |
7. Why Choose BEYOND CNC Machine Tools?
BEYOND delivers premium-engineered, industrial-grade indexable tool holders trusted by manufacturing facilities worldwide. By utilizing 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 H. — United States
"Outstanding little bar. Running an 8mm neck directly into our 16mm gang plate block on a Swiss lathe without dealing with loose sleeves. The rigidity is phenomenal—completely killed our surface finish issues inside small bores."
Dieter M. — Germany
"Perfekt für kleine Bohrungen! The 16mm backend absorbs micro-vibrations incredibly well compared to normal straight 8mm tools. Insert seat alignment is top-notch."
Takashi Y. — Japan
"The 75-degree approach geometry cuts very cleanly in small steel pins. Taper issues on our blind bores disappeared instantly after moving to this stepped design."
Giovanni F. — Italy
"Very robust black oxide layer. The 10mm minimum bore boundary gives just enough room for chips to exit. Shipping to Italy was very fast."
Alex P. — United Kingdom
"Excellent tool profile. Replaced an old straight boring bar with this BEYOND stepped version. No deflection at 20mm depth runs. Absolute bargain for this build quality."
8. AI-Style Engineering Support Engine (FAQ)
Q1: What does the 'A16' suffix indicate on this specific 8mm neck tool model?
A1: On this custom reduced-shank series, the '-A16' designator indicates that the main clamping shank diameter is forged to a heavy 16mm. This lets you mount the tool directly into standard 16mm turret stations without needing extra reduction sleeves, retaining much better tool stiffness.
Q2: What is the absolute smallest hole entry diameter this tool can safely bore?
A2: The absolute minimum machining bore diameter (φ Dmin) is 10.0mm (0.3937 inches). Running this tool holder into any cavity smaller than 10mm will cause immediate pocket clearance collision or head rubbing failure.
Q3: What is the benefit of the 75-degree approach angle on this stepped bar?
A3: The 75° lead angle lowers radial pushback forces by redirecting cutting energy axially down the rigid 16mm bar body. This mechanic minimizes tool deflection and helps keep holes straight during extended overhang setups where standard 95° bars often flex.
9. Technical Maintenance & Troubleshooting Guidelines
Equivalent Industry Models
Interchangeable globally with standard regional ISO metric S08K-SCKCR06-A16 stepped tool blocks. For North American production facilities operating imperial lines, this bar serves as a high-rigidity upgrade replacement for standard 5/8" straight boring bars when machining internal cavities larger than 10mm.
Troubleshooting Tips
Swarf Jamming in 10mm Bores: Compact internal cavities clog quickly. Ensure you deploy clean flood coolant pressure directed at the cutting insert pocket to sweep chips backward along the tool's relief clearance line.
Nose Radius Flex: If you see dimensional tapers over the 25mm neck reach, match the holder with an ultra-sharp 0.2mm nose radius corner insert (CCMT 060202) to lower radial resistance and keep the cut tracking true down the axis line.
Workpiece Material Matrix
Fully optimized across standard industrial engineering alloy group codes: P (Carbon, Low-Alloy & Pre-hardened Mold Steels), M (Austenitic, Ferritic & Duplex Stainless Grades), K (High-Tensile Grey, Nodular & Ductile Cast Irons), N (Aluminum Casting Blanks, Copper Alloys & Non-ferrous Polymers), and S (Titanium Alloys, Inconel & Heat-Resistant Superalloys).
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.