BEYOND D20R-SVXBR16 Spring Steel Internal Boring Bar – CNC Lathe Turning Tool Holder for VBMT160404 Inserts (20mm Shank Diameter, 200mm Overall Length, Insert Not Included)
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BEYOND D20R-SVXBR16 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 26mm?"
The BEYOND D20R-SVXBR16 is a professional-grade internal boring bar engineered for high-precision CNC lathe operations. Based on technical engineering drawing specifications, this tool features a metric shank diameter (phi d = 20 mm), an overall length (L = 200 mm), a functional head length (L1 = 50 mm), offset height (f = 13.5 mm), and a minimum bore diameter clearance (phi Dmin = 26 mm). Fabricated from premium spring steel with a rigid screw-down clamping system (utilizing an M4 x 10 screw and T15 Torx wrench), it firmly seats VBMT160404 indexable inserts, ensuring exceptional surface finish, correct lead angle alignment, and superior chip control.
ISO / ANSI Standard Nomenclature Breakdown: D20R-SVXBR16
2. Product Core Advantages
- High-Rigidity Spring Steel Shank: Provides superior structural damping compared to standard carbon steel bars, minimizing deflection across the 200mm overall length.
- Precision VBMT Clamping Geometry: Optimized 35-degree rhombic pocket securely locks VBMT160404 inserts using an M4 x 10 screw to eliminate micro-movement.
- Optimized Clearance & Dimensions: Features a minimum bore clearance (phi Dmin) of 26mm, functional head length (L1) of 50mm, and offset height (f) of 13.5mm.
3. Technical Specifications & Cutting Parameters
| Drawing Dimension Parameter | Metric Value & Inch Equivalent Class |
|---|---|
| Min. Bore Diameter (phi Dmin) | 26 mm (~1.02 inch) |
| Shank Diameter (phi d) | 20 mm (~3/4 inch Shank Class) |
| Functional Offset (f) | 13.5 mm (~0.53 inch) |
| Overall Length (L) | 200 mm (~7.87 inch) |
| Head Length (L1) | 50 mm (~1.97 inch) |
| Hardware & Accessories | Screw: M4 x 10 | Wrench: T15 |
| Specification Metric Class | Recommended Cutting Parameters |
|---|---|
| Metric Model: D20R-SVXBR16 Compatible Insert: VBMT160404 Series |
Cutting Speed (Vc): 120 - 220 m/min |
| Tool Cutting Edge Angle: 96 deg Insert Clearance Angle: B (5 deg) |
Feed Rate (fn): 0.10 - 0.25 mm/rev |
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[View Boring Bar Collection] →4. Product Application Scenarios
Engineered for CNC lathe internal profiling, finishing, and medium roughing operations in bores with a minimum diameter of 26mm. Ideal for machining deep internal cavities, complex internal contours, and precision toleranced cylindrical features across carbon steels, alloy steels, and stainless steel workpieces.
5. Compatibility & System Requirements
Fits standard 20mm lathe boring bar holders and split bushing adapters. Fully compatible with ISO standard VBMT160404 indexable turning inserts featuring 35-degree positive relief geometry and 5-degree insert clearance (alpha = 5 deg).
6. Workpiece Material Matrix & Grade Comparison
| ISO Material Group | Workpiece Type | Turning Performance |
|---|---|---|
| P (Steel) | Carbon & Alloy Steel | Exceptional surface finish and stable chip breaking |
| M (Stainless) | Austenitic Stainless Steel | Controlled heat generation and smooth evacuation |
| K (Cast Iron) | Gray & Ductile Iron | High wear resistance under continuous profiling |
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, inserts are sold separately to let you match the precise grade and chipbreaker required for your material.
Q: Why choose a spring steel boring bar over standard steel?
A: Spring steel offers enhanced elasticity modulus and damping capacity, significantly reducing chatter in deep internal boring operations.
Q: What is the minimum bore diameter recommended for the D20R-SVXBR16 bar?
A: Per technical drawings and specifications, the minimum bore diameter (phi Dmin) is 26mm, featuring a 20mm shank diameter (phi d) and 50mm head length (L1).
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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.