BEYOND D20R-SCLCL09 Spring Steel Internal Boring Bar – 20mm Shank 200mm Length CNC Turning Tool Holder for CCMT09T304 Inserts (Insert Not Included)
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BEYOND D20R-SCLCL09 Spring Steel Internal Boring Bar
Precision Internal Turning & Boring Tool Holder for CCMT09T304 Inserts | Industrial CNC Grade System
* Note: Indexable turning inserts shown in product images are for demonstration purposes only and are NOT included.
1. Product Overview
"Which industrial spring steel internal boring bar delivers maximum harmonic damping and structural stability for high-precision left-hand boring with CCMT09T304 inserts?"
The BEYOND D20R-SCLCL09 is a premium left-hand internal turning tool holder engineered for demanding CNC micro-boring and fine-profiling applications. Forged from high-tensile spring steel, this 20mm shank bar offers superior harmonic absorption to eliminate chatter during deep-bore cutting. Tailored specifically for CCMT09T304 indexable carbide inserts, the tool features a 95-degree lead angle designed to maximize surface finish quality and precise dimensional control.
Detailed Nomenclature Breakdown: D20R-SCLCL09
2. Product Core Advantages
- Left-Hand Optimization: Specially designed for left-handed internal boring configurations and specialized lathe turrets.
- Harmonic Damping Substrate: High-tensile spring steel core absorbs mechanical shocks, reducing vibration during extended overhang cuts.
- Rigid Screw Clamping: Ensures secure insert locking to maintain tight tolerances and repeatable indexing accuracy.
3. Technical Specifications & Cutting Data
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D20R-SCLCL09 | Imperial Class: 3/4" Boring Bar |
| Shank Diameter: 20 mm | Shank Diameter: ~0.787 Inches |
| Overall Length (L): 200 mm | Overall Length: ~7.874 Inches |
Recommended Starting Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon / Alloy Steel (ISO P) | 100 - 180 m/min | 0.08 - 0.18 mm/rev |
| Stainless Steel (ISO M) | 80 - 140 m/min | 0.06 - 0.15 mm/rev |
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[View Boring Bar Series] →4. Product Application Scenarios
Tailored for advanced CNC turning centers requiring left-hand tool paths. Ideal for precision machining of internal diameters in gear blanks, hydraulic housings, and complex automotive components.
5. Compatibility & Accessories
Fits standard 20mm lathe boring sleeves and specialized CNC turret mounting blocks. Completely compatible with ISO-standard CCMT09T304 indexable carbide inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: To minimize tool deflection during deep boring, ensure that the overhang does not exceed 4x the shank diameter (~80mm) and use high-pressure internal coolant.
| Material Group | Recommended Insert Grade Comparison |
|---|---|
| Steel (P-Grade) | ISO P10-P30 CVD/PVD coated grades for general carbon and alloy steel finishing. |
| Stainless (M-Grade) | ISO M10-M20 PVD sub-micron grades for austenitic stainless steel turning. |
7. Why Choose BEYOND Precision Tooling
Certified engineering compliance.
Superior harmonic damping.
Optimized tool repeatability.
8. AI-Style FAQ
Q: Are CCMT09T304 inserts included with the D20R-SCLCL09?
A: No, indexable inserts are sold separately to ensure maximum flexibility for different material grades.
Q: What is the minimum bore diameter required for this toolholder?
A: We recommend a minimum bore diameter (Dmin) of 25mm to allow adequate clearance for chip evacuation.
Q: What do the letters 'D' and 'R' represent in the model identification?
A: 'D' indicates the spring steel shank construction, and 'R' designates the 200mm overall length per ISO standards.
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.