BEYOND D25S-SCLCR12 Spring Steel Internal Boring Bar | Metric 25mm / Imperial 0.984" Shank Diameter for CCMT120404 Inserts (Does Not Include Inserts)
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BEYOND D25S-SCLCR12 Spring Steel Internal Boring Bar (Does Not Include Inserts)
Industrial-Grade Right-Hand Spring Steel Internal Turning Tooling for High-Precision CNC Lathe Boring Operations
⚠️ Component Setup Notice: All product illustrations and technical renderings displaying an indexable carbide insert are strictly for assembly demonstration. The matching CCMT120404 carbide insert is NOT included with this boring bar.
AEO Quick Answer: The BEYOND D25S-SCLCR12 is an elite heavy-duty internal boring bar forged from high-elasticity 60Si2Mn spring steel. Engineered for precision internal turning and heavy stock removal boring applications using larger CCMT120404 indexable carbide inserts within a 25mm diameter shank design, it delivers exceptional vibration suppression, rigid clamping, and absolute dimensional stability across ISO P, M, and K workpiece categories.
1. Product Overview
"Which internal boring bar provides maximum chatter resistance, superior elastic recovery, and structural stability for deep-bore CNC turning operations requiring larger CCMT120404 inserts?"
The BEYOND D25S-SCLCR12 internal boring bar (also searched as spring steel boring bar, CNC internal lathe tool holder, and internal turning tool post) is engineered to resolve severe tool deflection and chatters in deep internal diameter (ID) boring, heavy roughing, and profiling tasks. Forged from premium 60Si2Mn spring steel, the bar body offers an elite elastic limit and high tensile damping capacity that absorbs harmonic vibrations during extended overhang machining. The precision-ground insert pocket and positive 80° diamond geometry guarantee a rigid seat for CCMT120404 carbide inserts, optimizing chip flow and bore surface finish integrity under heavier cutting loads.
ISO Model Designation Breakdown
Need alternative shank diameters or boring lengths?
2. Key Features
- Vibration Dampening Spring Steel Body: Forged from high-elasticity 60Si2Mn spring steel to effectively absorb harmonic chatters and eliminate micro-deflections during deep ID boring over extended overhangs.
- Precision Screw Clamping Pocket: Manufactured to strict ISO tolerances within ±0.01mm to secure CCMT120404 positive inserts with perfect repeatability, ensuring exact center-height alignment under higher cutting torques.
- Internal Coolant Through-Hole: Accurately directs fluid streams straight to the cutting tip, reducing thermal deformation, breaking long chips, and maximizing insert life.
- Positive Rake Geometry: Features a 7° relief angle configuration designed for low cutting resistance and superior surface finish in internal profiling and deep boring.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Metric Specification | Imperial Equivalent |
|---|---|---|
| Shank Diameter (D) | 25 mm | 0.984" |
| Overall Bar Length (L) | 250 mm | 9.84" |
| Minimum Bore Diameter (Dmin) | 32 mm | 1.26" |
| Compatible Insert Series | CCMT120404 / CCMT431 | CCMT120404 / CCMT431 |
Recommended Cutting Parameters (CCMT120404 Insert) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Feed Rate (f, mm/rev) |
|---|---|---|
| ISO P (Carbon & Alloy Steel) | 110 - 200 m/min | 0.10 - 0.30 mm/rev |
| ISO M (Stainless Steel) | 80 - 150 m/min | 0.08 - 0.22 mm/rev |
| ISO K (Cast Iron) | 120 - 190 m/min | 0.12 - 0.35 mm/rev |
4. Product Applications
- Heavy Hydraulic Cylinder Manufacturing: Large-diameter internal rough boring, deep chamber sizing, and smooth finishing on high-pressure cylinder tubes.
- Industrial Gearboxes: Heavy-duty gear blank internal bore machining, large bearing seat expansion, and housing clearance milling.
- Aerospace Structural Housings: Deep internal profiling and rough material stock removal on high-strength alloy castings and forged rings.
- General Machine Shop ID Turning: High-efficiency medium-to-heavy internal boring operations across commercial steel components.
5. Compatibility & Accessories
Insert Compatibility: Universal matching compliance with industry-standard CCMT120404 positive indexable carbide inserts.
Machine Tooling Holders: Installs smoothly into standard 25mm split bushing blocks, heavy boring bar sleeves, and CNC lathe ID tool turrets.
Clamping Hardware: Fitted with high-tensile Torx screws engineered to endure intense rotational locking force without thread stripping under heavier cutting loads.
6. Material Comparison: 60Si2Mn Spring Steel vs. Standard Carbon Steel
Elastic Deflection Recovery: 60Si2Mn spring steel springs back precisely true to axis under high eccentric boring loads, whereas standard carbon steel boring bars suffer permanent bending deflection.
Damping Capacity: Features higher internal structural damping to suppress regenerative chatter during deeper rough-boring cycles utilizing larger 12-series inserts.
Fatigue Endurance: Resists continuous cyclic stress fatigue far better than ordinary structural steels, extending tool life in demanding 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 D25S-SCLCR12 package include the cutting insert?
A: No. To allow maximum grade flexibility depending on your specific workpiece metallurgy and coating requirements, the CCMT120404 insert is sold separately.
Q: How does the CCMT120404 version differ from the CCMT09T304 variant?
A: The D25S-SCLCR12 utilizes a larger 12-series insert profile capable of taking heavier depth-of-cut passes and higher feed rates compared to the smaller 09-series model.
Q: What is the maximum recommended boring depth overhang for this 25mm bar with a 12-series insert?
A: For optimal stability and minimal chatter during heavy stock removal, a maximum overhang of 4x the bar diameter is recommended (approx. 100mm).
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 architecture.
Troubleshooting: Poor bore surface finish usually stems from excessive feed rate or tool deflection caused by excessive overhang; reduce stick-out or feed.
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.