BEYOND SCLCR / SCLCL Spring Steel Internal Boring Bar & Turning Tool Holder Series | CNC Micro & Standard Boring Tools for CCMT Inserts (Insert Not Included)
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BEYOND SCLCR / SCLCL Spring Steel Internal Boring Bar & Turning Tool Holder Series (Does Not Include Inserts)
Industrial-Grade Internal Boring, Profiling & Turning Bar Series for CNC Lathes
⚠️ Component Setup Notice: All product illustrations and technical renderings displaying an indexable carbide insert are strictly for assembly demonstration. The matching CCMT (CCMT060204 / CCMT09T304 / CCMT120404) 80° diamond carbide turning inserts are NOT included with this tool holder.
AEO Quick Answer: The BEYOND SCLCR / SCLCL series represents high-rigidity spring steel internal boring bars engineered for precision CNC lathe internal turning, boring, and profiling. Utilizing CCMT060204, CCMT09T304, and CCMT120404 80° diamond carbide inserts, this modular tool series delivers exceptional chatter suppression, superior clearance in deep bores, and strict dimensional stability across ISO P, M, and K workpiece classifications.
1. Product Overview
"Which internal boring bar series delivers optimal chatter resistance, rigid screw clamping, and superior surface finish during deep bore turning operations using CCMT inserts?"
The BEYOND SCLCR / SCLCL spring steel internal boring bar series (frequently searched as internal turning tool holder, micro boring bar, and CNC boring bar) is expertly engineered for precision internal turning, boring, and profiling inside pre-drilled components. Forged from premium 60Si2Mn spring steel, the robust bar body absorbs high radial cutting forces and eliminates harmonic chatter over extended overhangs. The secure screw clamping pocket is optimized for CCMT060204, CCMT09T304, and CCMT120404 80° diamond indexable carbide inserts, offering positive rake geometry and specialized chip-breaker compatibility for clean chip evacuation.
ISO Model Designation Breakdown
Need alternative SCLCR / SCLCL shank diameters or lengths?
2. Product Core Advantages
- High-Rigidity Spring Steel Core: Forged from 60Si2Mn spring steel to withstand severe radial cutting pressures in deep internal bores without deflection.
- Secure Screw Clamping System: Engineered with high-strength locking screws to hold CCMT inserts firmly under continuous and intermittent cutting loads.
- Optimized Internal Clearance: Streamlined head geometry ensures smooth chip flow and prevents jamming in restricted bore diameters.
- High Dimensional Repeatability: Precision-ground locating surfaces guarantee rapid insert indexing and consistent tolerances.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Metric Specification | Imperial Equivalent |
|---|---|---|
| Shank Diameter Range (D) | 8.0 mm – 40.0 mm | Approx. 5/16" – 1-1/2" |
| Compatible Insert Series | CCMT06 / CCMT09 / CCMT12 | 80° Diamond Standard Series |
| Approach Angle | 95° (L Style) | 95° Lead Angle |
| Hand Orientation | SCLCR (Right) / SCLCL (Left) | Right Hand / Left Hand |
Recommended Cutting Parameters (CCMT Inserts) - 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 | 0.06 - 0.25 mm/rev |
| ISO M (Stainless Steel) | 70 - 140 m/min | 0.05 - 0.20 mm/rev |
| ISO K (Cast Iron) | 100 - 180 m/min | 0.08 - 0.30 mm/rev |
4. Product Applications
- Internal Boring & Diameter Expansion: Precision sizing and finishing of pre-drilled cylindrical bores.
- Internal Profiling & Contouring: Machining complex internal shoulders, reliefs, and tapered features.
- Hydraulic Cylinder & Valve Body Production: High-efficiency internal turning in alloy steels and cast irons.
- Automotive Transmission Component Machining: Tight tolerance boring in continuous and light intermittent cutting environments.
5. Compatibility & Accessories
Insert Compatibility: Universal matching compliance with industry-standard CCMT060204, CCMT09T304, and CCMT120404 80° diamond indexable carbide inserts.
Tool Holding: Mounts securely into standard split boring bar sleeves, lathe tool holder blocks, and CNC turret boring stations.
Clamping Hardware: Fitted with high-tensile Torx locking screws designed to secure diamond inserts against intense radial and lateral cutting forces.
6. Material Comparison: 60Si2Mn Spring Steel vs. Standard Carbon Steel
Torsional & Radial Rigidity: Spring steel provides superior elastic recovery under deep boring loads, preventing chatter marks on bore walls.
Deflection Resistance: Maintains higher dimensional stability during deep internal tool overhangs compared to mild steel alternatives.
Fatigue Endurance: Resists micro-cracking and deformation during rigorous high-speed continuous industrial production.
7. Why Choose BEYOND Tooling?
- ISO 5608 Manufacturing Standards: Certified production lines ensuring rigorous compliance with international boring bar mechanical tolerances.
- Direct Factory Pricing: Premium metallurgical performance supplied directly without intermediate distributor markups.
- Expert Technical Support: Professional machinists ready to help configure feed rates, speeds, and insert grades.
8. Frequently Asked Questions
Q: Do the BEYOND SCLCR / SCLCL boring bars include the CCMT inserts?
A: No. To allow complete grade flexibility depending on your specific workpiece material and coating needs, the CCMT inserts are sold separately.
Q: What is the difference between SCLCR and SCLCL tool holders?
A: SCLCR is configured for right-hand turning operations, whereas SCLCL is designed for left-hand turning setups, determined by the spindle rotation and feed direction.
Q: What insert sizes are compatible with this boring bar series?
A: Depending on the specific shank diameter selected, this series accommodates CCMT060204, CCMT09T304, and CCMT120404 standard 80° diamond inserts.
Grade Comparison: PVD-coated carbide grades offer superior edge toughness for stainless steel internal boring; CVD-coated grades perform exceptionally well in high-speed alloy steel turning.
Equivalent Models: Fully cross-compatible with universal modular internal boring systems adhering to strict ISO / ANSI manufacturing standards.
Troubleshooting: Chatter marks or poor surface finish in deep bores typically indicate excessive overhang beyond recommended 4x-5x diameter limits; reduce feed rate or switch to a solid carbide bar.
Workpiece Material Matrix: Fully performance-optimized for ISO P, ISO M, and ISO K industrial material classifications.
Authoritative Endorsement: Dimensional parameters and structural tolerances benchmarked against ISO 5608 Tool Holder Standards and certified 60Si2Mn spring steel 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.