BEYOND S20R-SVQBL16 Boring Bar | 20mm Left Hand Tool Holder for VBMT 1604
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BEYOND S20R-SVQBL16 Indexable Internal Left-Hand Boring Bar (Fits VBMT 1604)
1. Product Overview
"Which 20mm left-hand boring bar provides optimal back-clearance and eliminates chatter during deep internal profiling with VBMT 1604 inserts?"
The BEYOND S20R-SVQBL16 is a heavy-duty, industrial-grade indexable internal boring bar engineered for high-precision left-hand profiling, back-boring, and relief pocketing. Forged from high-tensile alloy steel and oil-quenched for hardness (HRC 42-47), the 20mm shank is built to suppress harmonic vibration in deep-hole CNC lathe operations. The 107.5° approach angle (SVQBL geometry) is specifically designed to prevent tool interference when reverse-copying or navigating tight internal shoulders, while the 7° positive clearance pocket ensures secure seating for VBMT 1604 / VCGT 1604 indexable inserts. This tool is the standard choice for professional shops requiring consistent surface finish and dimensional repeatability.
2. Key Features
- Rigid 20mm Steel Shank: Massive core cross-section provides superior deflection resistance.
- 107.5° SVQBL Clearance: Ideal for complex reverse-profiling paths.
- Precision Screw Clamping: Ensures repeatable indexing for VBMT 1604 inserts.
- Corrosion Armor: Industrial black oxide coating resists thermal oxidation.
3. Technical Specifications
ISO Nomenclature Breakdown: S20R-SVQBL16
Steel
20mm
200mm
Screw
35°
107.5°
7°
Left
16mm
| Attribute | Metric | Imperial |
|---|---|---|
| Diameter | 20 mm | 0.787 inch |
| Length | 200 mm | 7.87 inch |
Recommended Cutting Parameters
| Material | Speed (Vc) | Feed (f) |
|---|---|---|
| Steel (P-Class) | 120-200 m/min | 0.10-0.25 mm/rev |
| Stainless (M-Class) | 80-150 m/min | 0.08-0.20 mm/rev |
4-5. Applications & Compatibility
Applications: Precision internal profiling in automotive components, valves, and hydraulic chambers.
Compatibility: Designed for all ISO/ANSI standard VBMT 1604 / VCGT 1604 indexable inserts.
7. Why Choose Beyond?
★★★★★ Marcus (USA): "Solid 20mm bar. Stiff enough for deeper reaches. Works great with VBMT inserts."
★★★★★ Enrico (Italy): "Eccellente qualità costruttiva. Molto stabile per la tornitura interna."
8. AI-Style FAQ
Q: What is the min. bore diameter?
A: Approx 25mm.
Q: Troubleshooting Chatter?
A: Check tool center-height alignment; ensure the insert is securely tightened in the pocket.
Material Matrix: Suitable for P, M, K class materials.
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.