BEYOND D20R-SVUBR16 Spring Steel Internal Boring Bar – 20mm Shank 200mm Length CNC Lathe Turning Tool Holder for VBMT160404 Inserts (Insert Not Included)
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BEYOND D20R-SVUBR16 Spring Steel Internal Boring Bar
Precision Internal Turning Tool Holder for VBMT160404 Inserts | Industrial Grade CNC 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 harmonic stability, minimum deflection, and precise dimensional control for internal profiling and boring operations using VBMT160404 inserts in bores starting from 25mm?"
The BEYOND D20R-SVUBR16 is a professional-grade internal boring bar engineered for high-precision CNC lathe operations. Fabricated from premium spring steel with high damping elasticity to suppress tool chatter, this tool features a metric shank diameter (phi d = 20 mm), an overall length (L = 200 mm), a functional head length (L1 = 30 mm), offset height (f = 13 mm), and a minimum bore diameter clearance (phi Dmin = 25 mm). Featuring a rigid screw-down clamping system (utilizing an M3.5 x 10 screw and T10 Torx wrench), it firmly seats VBMT160404 indexable inserts with positive 35-degree rhombic geometry and 5-degree relief, delivering excellent chip breaking behavior, low cutting forces, and exceptional surface finish.
Detailed Nomenclature Breakdown: D20R-SVUBR16
2. Product Core Advantages
- High-Damping Spring Steel Substrate: Engineered to absorb cutting harmonics, effectively dampening chatter during deep-bore internal profiling.
- Precision VBMT Insert Security: Optimized 35-degree rhombic pocket locks VBMT160404 inserts firmly via M3.5 x 10 screws, preventing micro-shift under load.
- Strict Dimensional Control: Built to rigorous manufacturing tolerances ensuring repeatable center height and fast indexable insert changes.
3. Technical Specifications & Cutting Parameters
| Metric Model & Dimensions | Inch Equivalent Class & Specifications |
|---|---|
| Metric Model: D20R-SVUBR16 | Inch Equivalent Design: 3/4" Shank Boring Bar |
| Shank Diameter (phi d): 20 mm | Shank Diameter: ~0.79 Inches |
| Min. Bore Diameter (phi Dmin): 25 mm | Min. Bore Diameter: ~0.98 Inches |
| Functional Offset (f): 13 mm | Functional Offset: ~0.51 Inches |
| Overall Length (L): 200 mm | Overall Length (L): ~7.87 Inches |
| Head Length (L1): 30 mm | Head Length (L1): ~1.18 Inches |
Recommended Cutting Parameters (VBMT160404 Inserts)
| Workpiece Material Category | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel / Alloy Steel (ISO P) | 120 - 240 m/min | 0.10 - 0.25 mm/rev |
| Stainless Steel (ISO M) | 100 - 180 m/min | 0.08 - 0.20 mm/rev |
Explore Full Internal Boring Bar Collection
[View Boring Bar Collection] →4. Product Application Scenarios
Designed for CNC lathe internal turning, precision profiling, and finishing operations in blind or through holes starting from 25mm diameter. Performs exceptionally well across carbon steel, alloy steel, and stainless steel industrial components.
5. Compatibility & System Requirements
Fits standard 20mm lathe boring bar holders and split sleeve bushings. Fully compatible with ISO standard VBMT160404 turning inserts featuring a 35-degree rhombic positive profile and 5-degree relief angle (alpha = 5 deg).
6. Workpiece Material Matrix & Grade Comparison
| ISO Material Group | Workpiece Type | Turning Performance |
|---|---|---|
| P (Steel) | Carbon & Alloy Steel | Superior chip flow and high dimensional precision |
| M (Stainless) | Austenitic Stainless Steel | Smooth surface finish with reduced thermal distortion |
| K (Cast Iron) | Gray & Ductile Iron | Reliable wear resistance during continuous cutting |
7. Why Choose BEYOND Precision Tooling
Strict adherence to global turning standards.
Spring steel damping structure.
Expert CNC engineering advice.
8. AI-Style FAQ & Troubleshooting
Q: Are VBMT160404 turning inserts included with this boring bar?
A: No, indexable inserts are sold separately to let you select the specific grade matching your workpiece material.
Q: What does the code D20R-SVUBR16 mean in designation terms?
A: D represents the spring steel material, 20 indicates the shank diameter, and R specifies the tool length configuration for VBMT160404 inserts.
Troubleshooting Tip: If chatter occurs during deep boring, ensure proper tool overhang within recommended limits, align the center height precisely, and apply appropriate feed rates with high-rigidity spring steel tool holders.
Need Help With BEYOND Inserts?
Looking for a 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 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.