BEYOND D20R-SDZCR11 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-SDZCR11 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 the optimal balance of vibration resistance and tool life for precision internal turning with DCMT11T304 inserts?"
The BEYOND D20R-SDZCR11 is a professional-grade internal turning tool holder, meticulously engineered for high-precision CNC lathe environments. Constructed from premium spring steel, the shank offers superior harmonic damping, significantly reducing chatter during deep-hole internal boring. With a 20mm shank diameter and 200mm length, this tool provides the stability required for tight-tolerance machining. It is optimized for DCMT11T304 inserts, ensuring that cutting force is evenly distributed through the precision-ground pocket, resulting in excellent chip control and surface finish quality.
Detailed Nomenclature Breakdown: D20R-SDZCR11
2. Product Core Advantages
- Vibration Dampening Core: High-elasticity spring steel significantly minimizes tool-tip deflection in deep bores.
- Secure Locking Mechanism: Precision screw-down geometry locks DCMT inserts firmly, ensuring repeatability.
- Optimized 95° Approach: Ideal for versatile longitudinal turning and facing operations in restricted internal spaces.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D20R-SDZCR11 | Imperial Class: 3/4" Shank 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) | 100 - 180 m/min | 0.08 - 0.20 mm/rev |
| Stainless Steel (ISO M) | 70 - 140 m/min | 0.06 - 0.15 mm/rev |
Browse Related Internal Boring Bars
[View Boring Bar Series] →4. Product Application Scenarios
Engineered for high-precision internal turning, boring, and face profiling in bores starting from 25mm. Essential for precision parts manufacturing, automotive bushings, and small-diameter hydraulic systems.
5. Compatibility & Tooling Accessories
Fits standard 20mm boring bar holders and lathe turret sleeves. Optimized for compatibility with industry-standard DCMT11T304 indexable carbide turning inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: Ensure overhang does not exceed 3.5x shank diameter (~70mm) to maximize the damping benefits of the spring steel material.
| Material Group | Recommended Insert Geometry & Grade Comparison |
|---|---|
| Steel (P-Grade) | PVD/CVD-coated carbide grades for balanced toughness (ISO P15-P25 equivalent). |
| Stainless (M-Grade) | Tough sub-micron carbide grades optimized for heat resistance (ISO M10-M20 equivalent). |
7. Why Choose BEYOND Precision Tooling
Certified performance metrics.
Superior harmonic damping.
Engineered for consistent results.
8. AI-Style FAQ
Q: Does this boring bar come with DCMT11T304 inserts included?
A: No, inserts are sold separately to allow for grade customization based on your specific material and application.
Q: What is the minimum bore diameter for D20R-SDZCR11?
A: We recommend a minimum bore diameter of 25mm to ensure proper clearance and chip management.
Q: What do 'D' and 'R' represent in the model number?
A: 'D' indicates the spring steel material category, and 'R' specifies the 200mm length according to international standards.
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.