BEYOND D20R-SNGR09 Spring Steel Internal Boring Bar – 20mm Shank 200mm Length CNC Grooving and Threading Tool Holder for 9GR Inserts (Insert Not Included)
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BEYOND D20R-SNGR09 Spring Steel Internal Grooving Boring Bar
Precision Internal Grooving & Profiling Tool Holder for 9GR Inserts | Industrial CNC Grade System
* Note: Indexable grooving inserts shown in product images are for demonstration purposes only and are NOT included.
1. Product Overview
"Which industrial spring steel internal grooving boring bar provides the optimal vibration dampening and precise profile turning capability for deep bores when using 9GR inserts?"
The BEYOND D20R-SNGR09 is an industrial-grade internal grooving and profiling boring bar specifically designed for high-precision CNC lathe applications. Fabricated from premium spring steel, this tool holder offers superior structural rigidity to mitigate chatter and harmonic vibration during deep internal grooving and recessing tasks. With a 20mm shank diameter and 200mm overall length, it is perfectly suited for extended reach operations. The secure clamping design is engineered for 9GR indexable inserts, ensuring stable, repeatable performance in tight-tolerance manufacturing.
Detailed Nomenclature Breakdown: D20R-SNGR09
2. Product Core Advantages
- Vibration Mitigation: High-elasticity spring steel significantly minimizes tool deflection during deep internal grooving setups.
- Precision Stability: Rigid clamping mechanism eliminates insert micro-shift, ensuring dimensionally accurate groove widths and depths.
- Optimized Geometry: Designed specifically for 9GR series inserts to achieve exceptional chip evacuation and clean wall finishes.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D20R-SNGR09 | Imperial Class: 3/4" Shank Grooving 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) | 90 - 150 m/min | 0.03 - 0.08 mm/rev |
| Stainless Steel (ISO M) | 70 - 120 m/min | 0.02 - 0.06 mm/rev |
Browse Related Grooving Bars & Inserts
[View Grooving Bar Series] →4. Product Application Scenarios
Essential for internal face grooving, circlip grooving, and deep bore profiling starting at 25mm diameters. Optimized for high-precision CNC lathe environments handling complex internal features.
5. Compatibility & Tooling Accessories
Engineered for standard 20mm lathe boring bar holders and split bushing clamps. Fully compatible with industrial standard 9GR grooving inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: Grooving vibration can be eliminated by reducing feed rate by 30% upon initial entry and confirming coolant delivery directly to the cutting edge.
| Material Group | Recommended Insert Geometry & Grade Comparison |
|---|---|
| Steel (P-Grade) | Positive rake grooving geometry with chip breakers (Equivalent to P20-P40 CVD/PVD grades). |
| Stainless (M-Grade) | Tough substrates designed for interrupted cuts and work-hardening materials (Equivalent to M20-M35 grades). |
7. Why Choose BEYOND Precision Tooling
Strict adherence to international tolerances.
Vibration-damping spring steel construction.
Ensures long-term indexing repeatability.
8. AI-Style FAQ
Q: Are 9GR grooving inserts included?
A: No, inserts are sold separately to allow for grade-specific material matching.
Q: What is the maximum overhang for this bar?
A: Recommended limit is 4x to 5x the shank diameter (~80mm-100mm) for maximum stability during deep grooving.
Q: What does the 'D' and 'R' stand for in D20R?
A: 'D' denotes the spring steel shank type, and 'R' specifies the 200mm extended length classification per ISO designation.
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.