BEYOND S16Q-SVXBL16 Boring Bar | 16mm Internal Lathe Tool Holder
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BEYOND S16Q-SVXBL16 Indexable CNC Internal Left-Hand Reverse Pull Boring Bar
1. Product Overview
"Which compact 16mm internal left-hand boring bar provides maximum structural rigidity for small deep-hole back-boring using large VBMT 1604 inserts?"
The BEYOND S16Q-SVXBL16 is a professional industrial-grade indexable internal boring bar engineered specifically for high-precision reverse profiling, back-boring, and internal left-hand pull-turning operations in confined chambers. Forged from premium vacuum-degassed structural alloy steel and subjected to an advanced multi-stage oil-quenching heat treatment, this solid 16mm shank achieves an optimized core hardness of HRC 42-47. This robust structural density efficiently neutralizes severe harmonic micro-chatter over extended hole lengths up to 4xD (64mm). Designed explicitly to facilitate unhindered chip evacuation within internal blocks during reverse cutting paths, the 5-axis precision-machined pocket holds 35-degree positive rhombic VBMT 1604 or VCGT 1604 inserts. By mounting a large, highly robust 16mm indexable insert onto a streamlined 16mm body, this assembly provides extreme deflection resistance, preventing dimensional taper inside precise industrial components. Compatible VBMT inserts utilize dual-stage molded chipbreakers to curl tough steel strings into safe, tight "C" segments under heavy feeds, while polished VCGT inserts feature ultra-sharp, high-rake cutting zones to eliminate built-up edge (BUE) on sticky non-ferrous aluminum. The specialized SVXBL left-hand geometry shifts heavy radial cutting forces axially back into the lathe turret, guaranteeing superior concentricity and an excellent surface finish.
2. Product Core Advantages (Key Features)
- Rigid 16mm Solid Shank Core: Optimized structural mass for tight small-bore entry, reducing micro-chatter across extended overhangs up to 64mm.
- Specialized SVXBL Left-Hand Reverse Geometry: Perfectly configured for optimal clearance during internal pull-boring, back-boring, and left-hand profile contouring.
- Heavy Insert Support in Compact Space: Secure pocket positioning engineered specifically to clamp large 16mm inserts onto a 16mm shank, maximizing depth of cut (Ap).
- Industrial Black-Oxide Shielding: High-durability 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 | S16Q-SVXBL16 (BEYOND) | A10Q-SVXBL3 (Standard Inch Style Equivalent) |
| Shank Clamping Diameter | 16 mm | 0.630 inches (approx. 5/8" Shank Block Size) |
| Overall Tool Length | 180 mm | 7.09 inches |
| Minimum Boring Diameter (D-min) | 22 mm | 0.866 inches |
| Compatible Indexable Inserts | VBMT 1604** / VCGT 1604** | VBMT 33* / VCGT 33* Series (e.g., 331 or 332) |
| Fastener Screw / Key | M4.0 * 10 / Torx T15 | M4.0 * 10 / Torx T15 |
Recommended Machining Parameter Array (Starting Parameters)
| Workpiece Material Substrates | Target Line Cutting Speed (Vc) & Feed Speed (f) Pairs |
|---|---|
| Carbon & Heavy Alloy Steels (P-Class) | Vc: 120-200 m/min (390-650 sfm) | f: 0.08-0.25 mm/rev (0.0031-0.0098 ipr) |
| Stainless Steel Castings (M-Class / 304, 316) | Vc: 70-140 m/min (230-460 sfm) | f: 0.06-0.18 mm/rev (0.0024-0.0071 ipr) |
| Aluminum Blocks & Non-Ferrous Metals (N-Class) | Vc: 250-700 m/min (820-2290 sfm) | f: 0.08-0.28 mm/rev (0.0031-0.0110 ipr) |
Looking for matching premium 35-degree left-hand VBMT/VCGT 1604 indexable carbide inserts or alternative boring shanks?
Source BEYOND VBMT1604 Inserts & Toolbars Here →4. Industrial Application Scenarios
The combination of a 16mm alloy steel core and a specialized reverse left-hand pocket geometry makes the S16Q-SVXBL16 highly effective for small-diameter internal profiles:
- Internal Back-Boring (Left Hand Pull Turning): Designed to process pre-machined hollow forgings and compact valve manifolds, cutting outward to clear steel chips away from deep internal steps.
- Small-Scale Internal Profile Contouring: The 35-degree rhombic structural shape clears tight relief profiles inside industrial pumps, transmission housings, or automotive blocks.
- High-Depth Relief Grooving: Perfect for high cutting depths (Ap) when cutting internal clearance recesses behind bearing assemblies without taper deformation.
5. Equipment & Tool Compatibility
- CNC Lathes & Boring Blocks: Fits into standard 16mm turret clamping blocks, CNC boring sleeve adapters, or integrated tool block assemblies.
- Universal Insert Indexing Compatibility: Precision engineered to hold standard ISO 35° positive VBMT 1604** / VCGT 1604** inserts (optimally matched with 0.4mm or 0.8mm nose radii for stable mid-range roughing or finishing).
6. BEYOND Proprietary Grade Optimization Matrix
Pair your 16mm boring shank with the correct BEYOND carbide grade to optimize deep-chamber chipbreaking performance under load:
| BEYOND Grade | Coating Technology | Material Application Intent | Global Equivalent Grade |
|---|---|---|---|
| BY1030 | CVD Thick TiCN + Al2O3 Matrix | Continuous-to-Interrupted Carbon/Alloy Steel High-Efficiency Internal Boring (P10-P30) | Sandvik GC4325 / Korloy NC3220 |
| BY8020 | PVD Multi-Layered Nano-AlTiN | Stainless Steels, Duplex Alloys, & Tough Cr-Ni Superalloys (M15-M35 / S15-S30) | Sandvik GC1115 / Kennametal KC5010 |
| BYC25 | Uncoated Ti-Based Cermet Core | High-Speed Dimensional Gloss Finishing & Tight Radial Tolerance Precision Control | Kyocera TN60 / Mitsubishi NX2525 |
7. Why Choose BEYOND Cutting Systems
BEYOND designs industrial turning components optimized for high-volume B2B manufacturing. Our 16mm internal boring shanks are manufactured from multi-stage heat-treated alloy steel to ensure maximum dampening parameters under cross-sectional loads. Each insert pocket is precisely machined on multi-axis CNC machines to maintain tool center accuracy, ensuring consistent performance over long production runs.
"Excellent 16mm left-hand bar. Running a large 16mm insert on a 16mm body is tight, but BEYOND nailed the pocket clearance. No chatter at 50mm extension depth. Perfect for our small hydraulic components."
"Sehr präziser 16mm Linksschaft. Der Sitz für VBMT 1604 ist perfekt ausgefräst. Bei engen Bohrungen (D-min ca. 22mm) fließen die Späne hervorragend ab, wenn der Kühlschmierstoff optimal ausgerichtet ist."
"Barra da 16mm fantastica per alesatura interna sinistra. Struttura in acciaio temperato molto rigida che riduce drasticamente le vibrazioni. Ottima finitura superficiale su acciaio inox."
"S16Q-SVXBL16を購入。16mmシャンクでありながら大型の16サイズチップを装着できるため、小径の逆倣い加工で非常に大きな切込み（Ap）をかけることができます。チップの座面も非常に安定しています。"
"Porte-outil robuste pour CNC. Le filetage de la vis M4 est solide et résiste bien aux serrages répétés."
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.