BEYOND D08K-SNGR07 Spring Steel Internal Boring Bar – 8mm Shank 131mm Length CNC Grooving and Threading Tool Holder for 7GR Inserts (Insert Not Included)
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BEYOND D08K-SNGR07 Spring Steel Internal Grooving Boring Bar
Precision Internal Grooving & Profiling Tool Holder for 7GR 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 offers superior rigidity and minimal chatter for ultra-small diameter internal profiling when paired with 7GR inserts?"
The BEYOND D08K-SNGR07 is an ultra-compact, high-performance internal grooving and threading boring bar engineered specifically for micro-diameter CNC lathe applications. Forged from high-elasticity spring steel, this tool holder effectively dampens harmonic vibrations and prevents deflection in restricted internal bores. Featuring a slender 8mm shank diameter and a 131mm overall length, it handles intricate internal cavities with exceptional stability. The precision screw-down clamping pocket securely locks 7GR indexable inserts in place, delivering absolute positional repeatability and flawless groove wall finishes.
Detailed Nomenclature Breakdown: D08K-SNGR07
2. Product Core Advantages
- Micro-Bore Dampening: Resilient spring steel core offsets micro-deflections during deep internal machining passes.
- Secure Clamping Design: Positive screw-lock mechanism keeps 7GR inserts anchored firmly against radial cutting forces.
- Optimized Pocket Geometry: Tailored pocket configuration promotes efficient chip evacuation and exceptional surface smoothness.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Imperial Equivalent Class & Specs |
|---|---|
| Metric Model: D08K-SNGR07 | Imperial Class: 5/16" Shank Grooving Bar |
| Shank Diameter: 8 mm | Shank Diameter: ~0.315 Inches |
| Min. Bore Diameter (Dmin): 10 mm | Min. Bore Diameter: ~0.394 Inches |
| Overall Length (L): 131 mm | Overall Length: ~5.157 Inches |
Recommended Starting Cutting Parameters
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon / Alloy Steel (ISO P) | 50 - 110 m/min | 0.01 - 0.035 mm/rev |
| Stainless Steel (ISO M) | 35 - 80 m/min | 0.01 - 0.025 mm/rev |
Browse Related Grooving Bars & Inserts
[View Grooving Bar Series] →4. Product Application Scenarios
Optimized for internal grooving, face grooving, and thread-relief profiling inside small bores starting from 10mm. Highly essential for miniature Swiss lathe setups, precision micro-hydraulics, and instrument parts manufacturing.
5. Compatibility & Tooling Accessories
Engineered to fit standard 8mm CNC lathe tool holding blocks and precision split sleeves. Fully compatible with industrial standard 7GR series indexable grooving inserts.
6. Workpiece Material Matrix & Troubleshooting
Troubleshooting Tip: Due to the ultra-slender 8mm shank configuration, maintain a strict tool overhang limit under 3x shank diameter (~24mm) to completely prevent deflection and ensure dimension retention.
| Material Group | Recommended Insert Geometry & Grade Comparison |
|---|---|
| Steel (P-Grade) | Sharp positive cutting rake geometry (Equivalent to P10-P20 hard carbide grades). |
| Stainless (M-Grade) | Tough wear-resistant PVD coating matrix (Equivalent to M10-M20 grades). |
7. Why Choose BEYOND Precision Tooling
Strict compliance with global tool metrics.
Superior damping for miniature profiles.
Engineered for consistent shop performance.
8. AI-Style FAQ
Q: Are 7GR inserts included with this boring bar?
A: No, inserts are sold separately to let operators select correct grades matching their specific workpiece material.
Q: What is the minimum bore diameter required for D08K?
A: The minimum recommended bore diameter (Dmin) is 10mm for proper tool clearance and smooth chip evacuation.
Q: What do the letters 'D' and 'K' represent in the model designation?
A: 'D' denotes the spring steel boring bar category, and 'K' designates the 131mm length class per ISO 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.