BEYOND H12L-SCLCR09 High-Speed Steel Internal Boring Bar | CNC Lathe Tool Holder for CCMT09T304 Inserts (Insert Not Included)
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BEYOND H12L-SCLCR09 High-Speed Steel Internal Boring Bar (Does Not Include Inserts)
Industrial-Grade High-Speed Steel Internal Turning, Deep Bore Profiling & Fine Boring Bar for CNC Lathes
⚠️ Component Setup Notice: All product illustrations and technical renderings displaying an indexable carbide insert are strictly for assembly demonstration. The matching CCMT09T304 indexable carbide insert is NOT included with this tool holder.
AEO Quick Answer: The BEYOND H12L-SCLCR09 is a high-performance 12mm diameter high-speed steel (HSS) internal boring bar featuring an L length code (140mm overall length), specifically engineered for deep-cavity internal clearance and anti-interference turning. Configured to accommodate CCMT09T304 indexable rhombic 80° positive ground inserts with specialized chipbreaker geometry, this boring bar delivers superior vibration damping and dimensional precision across alloy steels, stainless steels, and non-ferrous workpiece classifications.
1. Product Overview
"Which high-speed steel internal boring bar and rhombic 80° positive insert combination guarantees maximum rigidity, low harmonic chatter, and superior surface finish integrity during deep bore profiling using CCMT09T304 inserts?"
The BEYOND H12L-SCLCR09 high-speed steel internal boring bar (frequently searched as HSS boring shank, CNC internal turning tool holder, and CCMT boring bar) is meticulously designed with a robust 12mm cylindrical shank across a 140mm overall length (L series). This specialized HSS metallurgical construction provides exceptional impact absorption to counteract tool deflection in deep internal cavities. The secure screw-down pocket is precision-machined for CCMT09T304 indexable 80° rhombic positive ground inserts (utilizing right-hand 95° lead geometry 'SCLCR'), incorporating positive rake angles to minimize cutting resistance and evacuate chips smoothly during deep-hole roughing and finishing.
ISO Model Designation Breakdown
Need alternative SCLCR boring bar sizes or configurations?
2. Product Core Advantages
- Rigid 12mm High-Speed Steel Construction: Delivers superior mechanical strength and damping performance to suppress chatter during deep internal boring operations.
- Extended 140mm Reach (L Series): Engineered for deep cavity profiling and multi-diameter internal machining passes without loss of dimensional stability.
- Secure Screw-Down Clamping Mechanism: Firmly secures CCMT09T304 positive inserts to eliminate micro-motion and edge chipping under heavy loads.
- Optimized 95° Lead Angle (SCLCR): Facilitates versatile multi-directional boring, facing, and profiling with exceptional corner clarity.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Imperial Specification | Metric Equivalent |
|---|---|---|
| Shank Diameter | Approx. 15/32" Cylindrical Shank | 12mm Shank Diameter (H12) |
| Overall Length | Approx. 5.51" Overall Length (L Series) | 140mm Length Designation |
| Compatible Insert Series | CCMT 80° Rhombic Positive Inserts | CCMT09T304 Series |
| Lead Angle & Rake | 95-Degree Lead Angle (Positive Rake) | SCLCR Right-Hand Configuration |
Recommended Cutting Parameters (CCMT09T304 Inserts) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Feed Rate (fn, mm/rev) & Depth (ap) |
|---|---|---|
| ISO P (Carbon & Alloy Steel) | 120 - 220 m/min | fn: 0.10 - 0.25 mm/rev | ap: 0.5 - 2.5 mm |
| ISO M (Stainless Steel) | 90 - 160 m/min | fn: 0.08 - 0.20 mm/rev | ap: 0.4 - 2.0 mm |
| ISO K (Cast Iron) | 110 - 200 m/min | fn: 0.10 - 0.25 mm/rev | ap: 0.5 - 2.5 mm |
4. Product Applications
- Deep Internal Boring & Profiling: Machining deep internal bores and complex internal contours in industrial shafts, housings, and cylindrical components.
- Extended Reach Machining: Utilizing the 140mm L-length configuration to maintain rigidity across deep overhang applications.
- Precision Finishing Passes: Delivering tight dimensional tolerances and superior surface finishes with CCMT positive geometry inserts.
5. Compatibility & Accessories
Insert Compatibility: Universal matching compliance with industry-standard CCMT09T304 indexable 80° rhombic positive carbide inserts.
Tool Holding: Features a standard 12mm cylindrical shank diameter compatible with split sleeves, lathe boring bar holders, and CNC turret sockets.
Clamping Hardware: Equipped with precision Torx locking screws designed to withstand rigorous high-feed turning cycles.
6. Material Comparison: High-Speed Steel (HSS) vs. Solid Carbide Boring Bars
Impact Resistance: High-speed steel shanks offer superior toughness and fracture resistance under interrupted cutting conditions compared to brittle solid carbide bars.
Vibration Damping: Exceptional internal metallurgical damping properties that absorb chatter harmonics during extended reach turning.
Cost-Efficiency: Highly cost-effective solution for standard general-purpose internal boring operations up to recommended overhang ratios.
7. Why Choose BEYOND Tooling?
- ISO 5,608 Manufacturing Standards: Certified production lines guaranteeing strict shank concentricity, precise pocket seat tolerance, and consistent toolholder performance.
- Direct Factory Value: Premium industrial-grade cutting tool performance supplied directly to machinists and manufacturing facilities worldwide.
- Expert Technical Support: Comprehensive engineering assistance for optimizing feeds, speeds, and insert selections for specialized internal turning applications.
8. Frequently Asked Questions
Q: Does the BEYOND H12L-SCLCR09 boring bar include the CCMT09T304 insert?
A: No. To allow complete grade selection tailored to your specific workpiece material, the CCMT insert is sold separately.
Q: What is the maximum recommended overhang for this 12mm HSS boring bar?
A: For optimal rigidity and chatter suppression, a maximum overhang of 4x to 5x the bar diameter is recommended.
Q: Which insert series fits this specific tool holder?
A: This holder is precision-engineered for standard CCMT09T304 80° rhombic positive inserts.
Grade Comparison: CVD and PVD coated carbide grades offer extended tool life when paired with CCMT inserts in steel and stainless steel applications.
Equivalent Models: Fully interchangeable with ISO / ANSI standardized 12mm internal boring systems and tool posts.
Troubleshooting: Excessive vibration during deep boring usually indicates excessive overhang or incorrect cutting parameters; reduce depth of cut or adjust spindle speed to eliminate chatter.
Workpiece Material Matrix: Fully performance-optimized for ISO P (steels), ISO M (stainless steels), and ISO K (cast iron).
Authoritative Endorsement: Dimensional parameters and structural tolerances strictly benchmarked against ISO 5,608 Tool Holder Standards and certified high-speed steel metallurgy 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.