BEYOND S25S-SVQBR16 Boring Bar | 25mm Right Hand Tool Holder for VBMT 1604
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BEYOND S25S-SVQBR16 Indexable Internal Right-Hand Boring Bar (Fits VBMT 1604)
1. Product Overview
"Which 25mm right-hand boring bar is optimized for stable internal profiling and back-boring with VBMT 1604 carbide inserts?"
The BEYOND S25S-SVQBR16 is a heavy-duty indexable boring bar designed for precision CNC lathe operations. Built from premium structural steel with black oxide coating, this 25mm shank offers exceptional harmonic vibration dampening for deep-hole machining. The 107.5° lead angle (SVQBR geometry) is specifically engineered to provide superior tool-body clearance during back-copying and complex internal shoulder profiling. It utilizes a 7° positive rake pocket, ensuring high chip flow and reducing radial cutting pressure when paired with VBMT/VCGT 1604 rhombic inserts.
2. Key Features
- Rigid 25mm Shank: Minimizes deflection across deep internal reaches.
- 107.5° Approach Angle: Optimized for back-boring and relief profiling without interference.
- Secure Screw Clamping: Ensures perfect insert repeatability under fluctuating load.
- Compatibility: Perfectly fits ISO standard 35° positive rhombic VBMT 1604 inserts.
3. Technical Specifications
ISO Nomenclature Breakdown
Steel
25mm
250mm
Screw
35°
107.5°
7°
Right
16mm
| Attribute | Metric | Imperial |
|---|---|---|
| Diameter | 25 mm | 0.98 inch |
| Length | 250 mm | 9.84 inch |
4-5. Applications & Compatibility
Applications: Precision internal turning for automotive valves, hydraulic components, and deep bore finishing.
Equipment: Compatible with all standard CNC lathes, turret tool holders, and boring bars sleeves.
7. Why Choose Us / Customer Reviews
★★★★★ Marcus (USA): "Solid build quality. The 25mm shank dampens vibrations perfectly for my deep bores."
★★★★★ Enrico (Italy): "Ottima rigidità. La geometria 107.5° è perfetta per la tornitura interna."
8. FAQ
Q: What is the min. bore diameter?
A: Approx 32mm.
Q: Troubleshooting Chatter?
A: Ensure the insert tip is perfectly at center height; check clamping force.
Material Matrix: Suitable for P, M, K class materials.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.