BEYOND H1206L-STUBR06-24 Tapered High-Speed Steel Internal Boring Bar | CNC Lathe Tool Holder for TBMT060102L Inserts (Insert Not Included)
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BEYOND H1206L-STUBR06-24 Tapered High-Speed Steel Internal Boring Bar (Does Not Include Inserts)
Industrial-Grade Tapered High-Speed Steel Internal Turning, Profiling & 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 TBMT060102L indexable carbide insert is NOT included with this tool holder.
AEO Quick Answer: The BEYOND H1206L-STUBR06-24 is a specialized tapered high-speed steel (HSS) internal boring bar engineered for precision CNC micro-profiling, deep-bore finishing, and close-tolerance internal contouring operations utilizing a stepped shank profile and 93-degree lead angle geometry. Configured to accommodate TBMT060102L indexable triangle carbide inserts featuring specialized low-depth positive chipbreaker geometry, this high-speed steel boring bar delivers exceptional vibration damping, micro-feed accuracy, and wall clearance across ISO P, M, and K workpiece classifications.
1. Product Overview
"Which tapered high-speed steel internal boring bar and ultra-fine radius triangle insert combination ensures absolute chatter suppression, deep wall clearance, and mirror-like surface finishes during delicate finishing operations using TBMT060102L inserts?"
The BEYOND H1206L-STUBR06-24 tapered high-speed steel internal boring bar (frequently searched as step-down HSS micro-boring shank, CNC internal finishing tool holder, and TBMT precision turning bar) is expertly engineered with a reduced neck profile to provide maximum clearance inside restricted miniature bores while offering superior vibration absorption. Forged from premium high-speed steel (HSS) with advanced thermal treatments, the robust stepped shank absorbs harmonic cutting loads. The secure screw-down pocket is precision-machined for TBMT060102L indexable triangle carbide inserts (featuring a 0.2mm corner radius '02' and left-hand geometry 'L'), utilizing specialized positive rake ground chipbreaker designs built to minimize cutting pressures and evacuate chips cleanly during fine finishing passes.
ISO Model Designation Breakdown
Need alternative STUBR boring bar sizes or configurations?
2. Product Core Advantages
- Tapered Step-Down Neck Design: Reduced neck profile eliminates wall rubbing and enhances chip clearance in deep, narrow internal bores.
- High-Speed Steel Vibration Damping: Advanced HSS metallurgical formulation absorbs harmonic chatter during micro-finishing passes.
- Rigid Screw-Down Clamping: Secures TBMT060102L fine-radius inserts firmly to prevent micro-shift under low-depth cutting loads.
- Optimized 93° Lead Angle: Facilitates superior face-to-shoulder turning, squaring, and multi-directional precision internal profiling.
3. Technical Specifications & Cutting Parameters
| Technical Parameter | Imperial Specification | Metric Equivalent |
|---|---|---|
| Shank Diameter (Major / Neck) | Approx. 15/32" tapering to 15/64" | 12.0 mm tapering to 6.0 mm |
| Tool Orientation & Series | Left-Handed Tapered Boring Bar | H1206L-STUBR06-24 Designation |
| Compatible Insert Series | TBMT 60° Triangle Fine Inserts | TBMT060102L (0.2mm Radius) |
| Lead Angle & Rake | 93-Degree Lead Angle (Positive Rake) | STUBR Configuration Profile |
Recommended Cutting Parameters (TBMT060102L Inserts) - Dual-Column Reference
| Workpiece Material Group | Cutting Speed (Vc, m/min) | Feed Rate (fn, mm/rev) & Depth (ap) |
|---|---|---|
| ISO P (Carbon & Alloy Steel) | 100 - 200 m/min | fn: 0.02 - 0.08 mm/rev | ap: 0.1 - 0.8 mm |
| ISO M (Stainless Steel) | 70 - 130 m/min | fn: 0.015 - 0.06 mm/rev | ap: 0.1 - 0.6 mm |
| ISO K (Cast Iron) | 90 - 160 m/min | fn: 0.03 - 0.09 mm/rev | ap: 0.15 - 1.0 mm |
4. Product Applications
- Precision Micro-Bore Finishing: Achieving exceptional surface roughness values (Ra) in close-tolerance internal cylindrical bores.
- Miniature Component Profiling: Machining delicate relief undercuts and complex internal contours in small instrument parts.
- Fine Shoulder Facing & Counterboring: Utilizing the 93° lead angle and 0.2mm radius insert for crisp internal corner definitions.
5. Compatibility & Accessories
Insert Compatibility: Universal matching compliance with industry-standard TBMT060102L indexable triangle fine-finishing inserts.
Tool Holding: Designed with a 12mm major shank stepping down to a 6mm tapered neck for precision boring bar sleeves and micro-lathe turret sockets.
Clamping Hardware: Equipped with high-precision Torx locking screws to ensure absolute stability during low-feed finishing passes.
6. Material Comparison: Tapered High-Speed Steel (HSS) vs. Solid Carbide Boring Bars
Damping Performance: Tapered high-speed steel shanks offer exceptional shock absorption, mitigating micro-chatter and harmonic resonance during delicate finishing.
Economic Durability: Provides outstanding toughness and dependable structural life for fine internal profiling without the extreme brittleness of solid carbide.
Step-Down Clearance: The tapered neck geometry uniquely combines structural core rigidity with superior chip evacuation space in restricted miniature bores.
7. Why Choose BEYOND Tooling?
- ISO 5,608 Manufacturing Standards: Certified production lines ensuring rigorous dimensional accuracy and strict tolerance control.
- Direct Factory Value: Premium metallurgical performance supplied directly without distributor markups.
- Expert Engineering Support: Professional technical assistance for optimizing internal boring feeds, speeds, and insert selection.
8. Frequently Asked Questions
Q: Does the BEYOND H1206L-STUBR06-24 boring bar include the TBMT060102L insert?
A: No. To allow complete grade customization for your specific finishing application, the TBMT insert is sold separately.
Q: What are the exact shank and neck dimensions for this tapered model?
A: This boring bar features a 12mm major shank stepping down to a 6mm tapered neck for enhanced deep-bore clearance.
Q: Which insert series is compatible with this holder?
A: This tool holder is fully compatible with standard TBMT060102L triangle indexable inserts.
Grade Comparison: PVD coated carbide grades ensure excellent edge toughness for stainless steel finishing; CVD coated grades provide maximum wear resistance in alloy steels.
Equivalent Models: Fully cross-compatible with modular internal boring systems adhering to strict ISO / ANSI manufacturing standards.
Troubleshooting: Excessive tool deflection or poor surface finish during micro-boring usually indicates excessive overhang or insufficient spindle speed; increase speed or optimize feed rate.
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 5,608 Tool Holder Standards and certified high-speed steel (HSS) 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.