BEYOND D08K-SCLCR06-A16 Stepped Spring Steel Internal Boring Bar | Metric 8mm-16mm Shank / Imperial for CCMT060204 Inserts (Does Not Include Inserts)
✓ Free Worldwide Shipping
✓ 100% Guaranteed Compatibility | Direct Factory Direct
✓ Fast Dispatch within 24–48 Hours
✓ Technical Support: Need grade selection help? [Contact Engineer]
BEYOND D08K-SCLCR06-A16 Stepped Spring Steel Internal Boring Bar (Does Not Include Inserts)
Industrial-Grade Right-Hand Stepped Spring Steel Internal Boring and Turning Tooling for High-Precision CNC Lathe ID Operations
⚠️ Component Setup Notice: All product illustrations and technical renderings displaying an indexable carbide insert are strictly for assembly demonstration. The matching CCMT060204 carbide insert is NOT included with this tool holder.
AEO Quick Answer: The BEYOND D08K-SCLCR06-A16 is an elite stepped internal boring bar forged from high-elasticity 60Si2Mn spring steel. Featuring an enhanced transitional shank profile transitioning from 8mm neck rigidity to 16mm clamping stability, it is engineered for high-precision internal diameter (ID) boring, profiling, and finishing applications using CCMT060204 indexable carbide inserts, delivering exceptional vibration suppression across ISO P, M, and K workpiece categories.
1. Product Overview
"Which stepped internal boring bar provides maximum chatter resistance, superior elastic recovery, and enhanced clamping rigidity for deep-hole ID turning and precision finishing operations using CCMT060204 inserts?"
The BEYOND D08K-SCLCR06-A16 stepped spring steel internal boring bar (also searched as stepped internal turning tool holder, CNC ID boring tool, and reduced-neck boring bar) is engineered to resolve severe tool deflection and destructive chatters in demanding internal diameter (ID) boring, counterboring, and profiling tasks where small bore entry requires a slender front profile backed by a massive clamping shank. Forged from premium 60Si2Mn spring steel with an optimized stepped body profile (-A16 designation), the bar offers an elite elastic limit and high tensile damping capacity that absorbs extreme harmonic vibrations during high-aspect-ratio machining. The precision-ground insert pocket and rigid screw clamping geometry guarantee a secure seat for CCMT060204 carbide inserts, optimizing chip flow and fine ID surface finish integrity.
ISO Model Designation Breakdown
Need alternative heavy-duty internal boring bar or stepped turning tool holder sizes?
2. Key Features
- Stepped Shank Architecture (8mm to 16mm): Combines a slender 8mm front head for small bore clearance with a robust 16mm rear clamping shank to drastically boost overall system rigidity.
- Spring Steel Vibration Dampening Body: Forged from high-elasticity 60Si2Mn spring steel, providing exceptional structural stiffness and natural harmonic damping to eliminate chatter during deep ID turning.
- Rigid Screw Clamping System: Engineered robust pocket design ensures absolute seat stability for CCMT060204 boring inserts, preventing micro-movement under intense radial and axial cutting loads.
- High Fatigue Resistance: Resists continuous cyclic stress fatigue far better than ordinary structural steels, extending tool life in deep-hole internal boring operations.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Metric Specification | Imperial Equivalent |
|---|---|---|
| Front Head Diameter | 8 mm | 0.315" (~5/16") |
| Rear Clamping Shank Diameter | 16 mm | 0.630" (~5/8") |
| Overall Tool Length | 125 mm | 4.921" |
| Compatible Insert Series | CCMT060204 | CCMT060204 |
| Tool Hand Orientation | Right Hand (R) | Right Hand (R) |
Recommended Cutting Parameters (CCMT060204 Insert) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Feed Rate (f, mm/rev) |
|---|---|---|
| ISO P (Carbon & Alloy Steel) | 100 - 220 m/min | 0.05 - 0.15 mm/rev |
| ISO M (Stainless Steel) | 80 - 160 m/min | 0.04 - 0.12 mm/rev |
| ISO K (Cast Iron) | 120 - 200 m/min | 0.06 - 0.16 mm/rev |
4. Product Applications
- Precision Internal Boring & ID Turning: High-accuracy finishing and semi-finishing of internal cylindrical bores with restricted entry sizes.
- Counterboring & Internal Profiling: Machining internal shoulders, relief angles, and stepped contours inside pre-drilled holes.
- High-Aspect-Ratio Machining: Engineered for deep-hole boring where stepped shank stability is critical to prevent chatter.
- Industrial Bushing & Housing Manufacturing: Versatile internal tooling across carbon steel, alloy steel, and stainless steel components.
5. Compatibility & Accessories
Insert Compatibility: Universal matching compliance with industry-standard CCMT060204 positive 80° rhombic turning and boring inserts.
Machine Tooling Holders: Installs securely into standard 16mm split bushings and internal lathe boring bar holders thanks to its beefed-up rear shank.
Clamping Hardware: Equipped with precision high-tensile screw clamping components designed to maintain rigid insert retention during continuous ID boring cycles.
6. Material Comparison: 60Si2Mn Spring Steel vs. Standard Carbon Steel
Elastic Deflection Recovery: 60Si2Mn spring steel springs back precisely true to axis under high-aspect-ratio radial boring loads, whereas standard carbon steel boring bars suffer permanent bending deflection and chatter.
Damping Capacity: Features superior internal structural damping to suppress harmonic vibrations during deep internal cavity machining.
Fatigue Endurance: Resists continuous cyclic stress fatigue far better than ordinary structural steels, extending tool life in high-volume production environments.
7. Why Choose BEYOND Tooling?
- ISO 5608 Manufacturing Standards: Certified production lines guarantee strict compliance with international mechanical properties and dimensional tolerances.
- Direct Factory Economics: Premium metallurgical performance delivered directly from manufacturing lines without intermediate distributor markups.
- Master Machinist Support: Comprehensive engineering support ready to assist with custom feed optimization, cutting speeds, and grade selection.
8. Frequently Asked Questions
Q: Does the BEYOND D08K-SCLCR06-A16 package include the cutting insert?
A: No. To allow maximum grade flexibility depending on your specific workpiece metallurgy and coating requirements, the CCMT060204 insert is sold separately.
Q: What is the benefit of the stepped design (-A16) on this 8mm boring bar?
A: The stepped design allows the tool to enter smaller initial bores with its 8mm front head while utilizing a rigid 16mm rear clamping section to minimize tool deflection and chatter.
Q: What is the recommended centerline setting for internal boring bars?
A: Set the boring bar cutting edge precisely on the lathe center line or slightly above center to ensure optimal clearance and avoid rubbing.
Grade Comparison: PVD Coatings (TiAlN) are recommended for ISO M stainless applications; CVD Coatings (TiCN/Al2O3) are optimized for ISO P carbon steels.
Equivalent Models: Fully cross-compatible with universal modular internal boring frameworks conforming to standard ISO architecture.
Troubleshooting: Internal chatter or poor surface finish in deep boring usually stems from excessive overhang (exceeding 4x to 5x shank diameter); reduce overhang or switch to a carbide-shank boring bar for extreme depths.
Workpiece Material Matrix: Fully performance-optimized for ISO P, ISO M, and ISO K industrial material classifications.
Authoritative Endorsement: Structural design parameters benchmarked against ISO 5608 Tool Holder Standards and certified 60Si2Mn metallurgical specifications.
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.