BEYOND D12M-SCLCR06-A16 Stepped Spring Steel Internal Boring Bar ID Turning Tool Holder | Metric Shank / Imperial for CCMT060204 Inserts (Does Not Include Inserts)
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BEYOND D12M-SCLCR06-A16 Stepped Spring Steel Internal Boring Bar and Turning Tool Holder (Does Not Include Inserts)
Industrial-Grade Stepped Positive 95° Spring Steel Internal Boring Bar for 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 D12M-SCLCR06-A16 is an elite stepped precision internal boring bar and turning tool holder forged from high-elasticity 60Si2Mn spring steel. Featuring a specialized stepped body profile (A16 head configuration), it is engineered for deep-reach internal diameter (ID) boring, roughing, and fine finishing operations using CCMT060204 indexable carbide inserts, delivering exceptional vibration suppression, rigid clamping, and absolute dimensional stability across ISO P, M, and K workpiece categories.
1. Product Overview
"Which stepped internal boring bar provides maximum chatter resistance, superior clearance in restricted bores, and structural rigidity for deep hole internal turning and profiling operations using CCMT060204 inserts?"
The BEYOND D12M-SCLCR06-A16 stepped spring steel internal boring bar and turning tool holder (also searched as stepped ID turning tool post, CNC boring holder, and spring steel internal lathe bar) is engineered to resolve severe tool deflection and destructive chatters in demanding internal diameter (ID) boring, counterboring, and fine finishing tasks. Forged from premium 60Si2Mn spring steel with an optimized stepped cylindrical shank profile (A16 variant), the bar offers an elite elastic limit and high tensile damping capacity that absorbs harmonic vibrations during deep hole machining. The precision-ground positive 95° insert pocket and rigid screw clamping geometry guarantee a secure seat for CCMT060204 carbide inserts, optimizing chip flow and internal ID surface finish integrity.
ISO Model Designation Breakdown
Need alternative internal boring bar or turning tool holder sizes?
2. Key Features
- Stepped Spring Steel Body Profile: Forged from high-elasticity 60Si2Mn spring steel with a stepped head design (A16 specification), offering superior clearance in restricted bore diameters while maintaining high structural stiffness and natural harmonic damping.
- Rigid Screw Clamping System: Engineered robust pocket design ensures absolute seat stability for CCMT060204 turning inserts, preventing micro-movement under intense radial cutting loads.
- Optimized Positive Rake Architecture: 7° positive clearance angle geometry maximizes cutting efficiency and lowers cutting forces across internal profiling operations.
- High Fatigue Resistance: Resists continuous cyclic stress fatigue far better than ordinary structural steels, extending tool life in production CNC lathe environments.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Metric Specification | Imperial Equivalent |
|---|---|---|
| Shank Diameter (D) | 12 mm | 1/2" (Approx. 0.472") |
| Overall Length (L) | 150 mm | 5.91" |
| Compatible Insert Size | CCMT060204 | CCMT 21.51 |
| Minimum Bore Diameter (Dmin) | 16 mm (Stepped Head A16) | 0.630" |
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) | 120 - 220 m/min | 0.06 - 0.15 mm/rev |
| ISO M (Stainless Steel) | 90 - 150 m/min | 0.04 - 0.12 mm/rev |
| ISO K (Cast Iron) | 130 - 240 m/min | 0.08 - 0.18 mm/rev |
4. Product Applications
- Precision Internal Boring & Counterboring: Enlarging and finishing pre-drilled internal holes on CNC lathes with tight dimensional tolerances.
- Internal Profiling & Contouring: Machining complex internal contours and relief features in deep hollow workpieces.
- High-Precision CNC Lathe Turning: Engineered for internal operations requiring extended overhang stability and superior surface finish.
- Hollow Shaft & Bushing Manufacturing: Versatile ID tooling across carbon steel, alloy steel, and stainless steel workpieces.
5. Compatibility & Accessories
Insert Compatibility: Universal matching compliance with industry-standard CCMT060204 positive 80° rhombic carbide turning inserts.
Machine Tooling Holders: Installs securely into standard 12mm split bushings and boring bar holders on CNC lathe turrets.
Clamping Hardware: Equipped with precision high-tensile Torx clamping screws designed to securely lock the insert against severe cutting forces.
6. Material Comparison: 60Si2Mn Spring Steel vs. Standard Carbon Steel
Elastic Deflection Recovery: 60Si2Mn spring steel springs back precisely true to axis under radial boring loads, whereas standard carbon steel boring bars suffer permanent bending deflection and tool chatter in deep holes.
Damping Capacity: Features superior internal structural damping to suppress harmonic vibrations during deep-reach internal turning operations.
Fatigue Endurance: Resists continuous cyclic stress fatigue far better than ordinary structural steels, extending tool life in 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 D12M-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 minimum bore diameter required for this stepped A16 boring bar?
A: Due to the stepped head design (A16 spec), the minimum recommended hole diameter for safe clearance is 16mm.
Q: What is the recommended tool centerline setting for this internal boring bar?
A: Set the boring bar cutting edge exactly on the lathe center line to ensure proper clearance angles and dimensional accuracy.
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 and turning frameworks conforming to standard ISO / ANSI architecture.
Troubleshooting: Internal chatter or poor surface finish during deep hole boring usually stems from excessive overhang exceeding 4x to 5x bar diameter; reduce depth of cut or use a shorter projection.
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.