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
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.