BEYOND D20R-SDXCR11 Spring Steel Internal Boring Bar – 20mm Shank 200mm Length CNC Turning Tool Holder for DCMT11T304 Inserts (Insert Not Included)
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✓ Global Shipping: Delivery: generally 5–20 business days, depending on destination and shipping method.
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💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
BEYOND D20R-SDXCR11 Spring Steel Internal Boring Bar
Precision Internal Turning & Boring Tool Holder for DCMT11T304 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 provides maximum stability for deep internal profiling and heavy-duty turning with DCMT11T304 inserts?"
The BEYOND D20R-SDXCR11 is a robust, high-rigidity internal turning tool holder engineered for demanding CNC lathe operations. Fabricated from premium spring steel, this 20mm shank bar offers exceptional harmonic damping to eliminate chatter during deep-bore machining. Designed specifically for DCMT11T304 indexable inserts, it features an optimized 95-degree approach angle and secure screw-clamp locking system, guaranteeing superior surface finish and structural integrity under heavy cutting loads.
Detailed Nomenclature Breakdown: D20R-SDXCR11
2. Product Core Advantages
- High-Rigidity Alloy: Advanced spring steel formulation absorbs high-frequency vibrations during deep boring passes.
- Secure Clamping Architecture: Precision-milled insert pocket with heavy-duty screw lock guarantees absolute insert stability.
- Optimized Geometry: Designed for smooth chip evacuation and high-feed turning efficiency across diverse alloys.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D20R-SDXCR11 | Imperial Class: 3/4" Boring Bar |
| Shank Diameter: 20 mm | Shank Diameter: ~0.787 Inches |
| Min. Bore Diameter (Dmin): 25 mm | Min. Bore Diameter: ~0.984 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) | 80 - 160 m/min | 0.08 - 0.22 mm/rev |
| Stainless Steel (ISO M) | 60 - 120 m/min | 0.06 - 0.18 mm/rev |
Browse Related Internal Boring Bars
[View Boring Bar Series] →4. Product Application Scenarios
Built for high-precision deep internal boring, roughing, and fine profiling in components requiring minimum bore diameters starting from 25mm. Widely utilized in heavy machinery manufacturing, automotive gearboxes, and hydraulic cylinder production.
5. Compatibility & Tooling Accessories
Fits standard 20mm CNC lathe boring bar holders, split bushings, and anti-vibration sleeves. Engineered for seamless pairing with industry-standard DCMT11T304 indexable carbide turning inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: To avoid chatter and maintain dimensional accuracy during deep-bore operations, ensure tool overhang does not exceed 4x the shank diameter (~80mm).
| Material Group | Recommended Insert Geometry & Grade Comparison |
|---|---|
| Steel (P-Grade) | CVD/PVD multi-layer coated grades (ISO P20-P35 equivalent) for high wear resistance. |
| Stainless (M-Grade) | Tough sub-micron carbide substrates (ISO M15-M25 equivalent) to combat thermal cracking. |
7. Why Choose BEYOND Precision Tooling
Strict industrial compliance.
Superior deflection resistance.
Engineered for high output.
8. AI-Style FAQ
Q: Does the D20R-SDXCR11 boring bar come bundled with DCMT11T304 inserts?
A: No, indexable inserts are sold separately so you can select the optimum grade for your specific metalworking project.
Q: What is the minimum bore diameter required for this 20mm bar?
A: The minimum bore diameter (Dmin) required is 25mm to ensure sufficient clearance for chip removal.
Q: What do the letters 'D' and 'R' represent in the ISO designation?
A: 'D' signifies the spring steel boring bar material class, and 'R' denotes the overall tool length of 200mm.
Need Help With OYYU/BEYOND Inserts?
Looking for a OYYU/BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This OYYU/BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.