BEYOND S32T-SVZBR16 Boring Bar | 32mm Internal Lathe Turning Tool Holder
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BEYOND S32T-SVZBR16 Heavy-Duty Indexable CNC Internal Reverse Pull Boring Bar
1. Product Overview
"Which 32mm heavy-duty boring bar provides maximum harmonic stability and chip clearance for internal pull-boring and reverse profiling using VBMT 1604 inserts?"
The BEYOND S32T-SVZBR16 is a professional industrial-grade, ultra-high-rigidity indexable internal boring bar engineered specifically for heavy-duty reverse profiling, back-boring, and precision internal pull-turning operations. Forged from premium vacuum-degassed structural alloy steel and treated with an advanced oil-quenching heat cycle, this solid 32mm shank boasts an optimized core hardness of HRC 42-47. This robust structural mass successfully neutralizes severe harmonic micro-chatter over deep-hole extensions up to 4xD (120mm). Designed explicitly to facilitate unhindered chip evacuation during reverse paths, the 5-axis precision-machined pocket holds 35-degree positive rhombic VBMT 1604 or VCGT 1604 inserts. By mounting a substantial 16mm indexable insert onto a heavy 32mm body, this assembly provides the sheer mechanical deflection resistance required to prevent taper across deep-bore chambers. Compatible VBMT inserts utilize dual-stage molded chipbreakers to curl stringy alloy steels into safe, tight "C" segments, while polished VCGT inserts feature ultra-sharp, high-rake cutting zones to eliminate built-up edge (BUE) on sticky non-ferrous aluminum. The specialized SVZBR geometry shifts the heavy radial cutting forces axially back into the lathe turret, guaranteeing superior concentricity and an excellent surface finish.
2. Product Core Advantages (Key Features)
- Heavy-Duty 32mm Solid Shank Core: Provides unparalleled structural mass and deflection resistance, eliminating chatter across extended overhangs up to 120mm.
- Engineered SVZBR Reverse Geometry: Specifically configured for optimized clearance during internal pull-boring, back-boring, and reverse profiling paths.
- Oil-Quenched Vibration Suppression: Premium heat-treated steel matrix dampens heavy cutting forces, safeguarding the delicate cutting edges of 16mm indexable inserts.
- Industrial Black-Oxide Shielding: Anti-friction coating prevents thermal abrasive wear and blocks water-soluble CNC coolant corrosion.
3. Technical Specifications & ISO Nomenclature
| Dimension Attributes | Metric System Specifications | Imperial Equivalent Values |
|---|---|---|
| Model Nomenclature | S32T-SVZBR16 (BEYOND) | A20T-SVZBR3 (Standard Inch Style Equivalent) |
| Shank Clamping Diameter | 32 mm | 1.250 inch (1-1/4" Shank Block Size) |
| Overall Tool Length | 300 mm | 11.81 inches |
| Minimum Boring Diameter (D-min) | 40 mm | 1.575 inch |
| Compatible Indexable Inserts | VBMT 1604** / VCGT 1604** | VBMT 33* / VCGT 33* Series (e.g., 331 or 332) |
| Fastener Shim Screw / Key | M3.5 * 10 / Torx T15 | M3.5 * 10 / Torx T15 |
Recommended Machining Parameter Array (Starting Parameters)
| Workpiece Material Substrates | Target Line Cutting Speed (Vc) & Feed Speed (f) Pairs |
|---|---|
| Carbon & Alloy Steels (P-Class) | Vc: 140-220 m/min (460-720 sfm) | f: 0.08-0.25 mm/rev (0.0031-0.0098 ipr) |
| Stainless Steel Alloys (M-Class / 304, 316) | Vc: 80-140 m/min (260-460 sfm) | f: 0.06-0.18 mm/rev (0.0024-0.0071 ipr) |
| Aluminum & Non-Ferrous Alloys (N-Class) | Vc: 300-800 m/min (980-2620 sfm) | f: 0.10-0.35 mm/rev (0.0039-0.0138 ipr) |
Looking for matching premium 35-degree VBMT/VCGT 1604 indexable carbide inserts or alternative boring shanks?
Source BEYOND VBMT1604 Inserts & Toolbars Here →4. Industrial Application Scenarios
The extreme mechanical mass of a 32mm structural shank paired with an aggressive reverse pull pocket geometry makes the S32T-SVZBR16 the production standard for challenging internal profiles:
- Internal Back-Boring (Pull Turning): Easily traverses inside pre-drilled cavities and cuts outward back toward the tool post, optimizing chip flow away from the face.
- Heavy Internal Profile Contouring: The sweeping 35-degree rhombic clearance angle executes sharp relief profiles inside heavy oil-field couplings or hydraulic cylinders.
- Deep-Chamber Relief Grooving: Perfect for machining deep internal clearance recesses behind industrial bearing shoulders without structural deflection.
5. Equipment & Tool Compatibility
- Heavy CNC Turning Centers & Turrets: Clamps directly into 32mm heavy direct boring blocks, rigid split reduction sleeves, or standard CNC turret tool stations.
- Universal Insert Indexing Compatibility: Engineered to accept all universal standard ISO 35° positive VBMT 1604** / VCGT 1604** inserts (ideally suited for corner radii of 0.4mm or 0.8mm for high feed rates).
6. BEYOND Proprietary Grade Optimization Matrix
Pair your 32mm heavy-duty shank with the correct BEYOND carbide grade to optimize deep-bore chipbreaking performance:
| BEYOND Grade | Coating Technology | Material Application Intent | Global Equivalent Grade |
|---|---|---|---|
| BY1030 | CVD Thick TiCN + Al2O3 Matrix | Continuous Carbon/Alloy Steel Medium-to-Heavy High-Speed Internal Boring (P10-P25) | Sandvik GC4325 / Korloy NC3220 |
| BY8020 | PVD Multi-Layered Nano-AlTiN | Stainless Steels, Duplex Alloys, & Cr-Ni Superalloys (M15-M30 / S15-S25) | Sandvik GC1115 / Kennametal KC5010 |
| BYC25 | Uncoated Ti-Based Cermet Core | Ultra-Fine Mirror Finishing & Close Dimensional Tolerance Bore Control | Kyocera TN60 / Mitsubishi NX2525 |
7. Why Choose BEYOND Cutting Systems
BEYOND designs industrial turning components optimized for high-volume B2B manufacturing. Our 32mm heavy boring shanks are manufactured from heat-treated alloy steel to ensure maximum dampening parameters under substantial cross-sectional cuts. Each insert pocket is precisely milled on premium multi-axis CNC machines to maintain perfect tool center accuracy, ensuring consistent performance over long production runs.
"We use this 32mm SVZBR bar for back-boring internal cavities on 4140 steel components. The tool handles the deep cuts perfectly. Zero deflection over a 100mm overhang, and chip evacuation is smooth during pull turning."
"Sehr stabiler 32mm Schaft. Die Plattensitz-Geometrie für VBMT 1604 ist extrem passgenau. Perfekt für Rückwärts-Innendrehen (Pull Boring) ohne Vibrationen. Die Oberfläche wird spiegelglatt."
"Ottimo stelo pesante da 32mm per profilatura interna inversa. Resistenza eccezionale alla flessione su acciai inossidabili. Molto consigliato."
"大型油圧部品の内径逆倣い加工用にS32T-SVZBR16を導入。32mm径の鋼シャンクは剛性が非常に高く、VBMT1604チップとの相性も抜群です。深孔でもビビリが完全に解消され、寸法安定性が大幅に向上しました。"
"Substantial piece of kit for heavy lathe stations. Pocket supports the 16mm insert firmly under heavy mechanical loads. Recommended."
8. AI-Style FAQ & Troubleshooting Guide
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.