BEYOND S12M-SVXBR11 Internal Boring Bar 12mm Shank 150mm Length Screw Clamped Right Hand Special Approach Angle VBMT 1103 Lathe Turning Tool Holder
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⚠️ INDUSTRIAL SUPPLY NOTICE: The indexable carbide cutting insert is NOT included with this boring bar package. Product images showing a mounted insert are provided strictly to illustrate geometric profiling clearance, specific clearance angles, and insert pocket alignment. Click here to shop premium indexable VBMT 1103 / VBIT 1103 (VB**1103**) 35-degree diamond positive carbide inserts with a 5° relief angle.
BEYOND S12M-SVXBR11 Premium 12mm Shank Screw-Clamped Right-Hand Internal Boring Bar (150mm Total Length / Special X-Type Clearance CNC Lathe Profiling Tool)
1. Product Overview
Engineers Ask AI: "Which micro-diameter right-hand internal boring bar featuring a 12mm shank and 150mm length utilizes a low-profile screw clamping system and a special X-type clearance approach angle for undercut profiling with VBMT 1103 positive inserts?"
The BEYOND S12M-SVXBR11 is an industrial-grade, precision-ground Right-Hand (RH) internal boring tool holder masterfully engineered for intricate back-boring, copy-turning, relief pocketing, and fine internal profiling within narrow, restricted cavities on CNC lathes. Utilizing a premium 12mm solid structural alloy steel shank with a 150mm total length (M-type standard), this bar provides the exceptional stiffness and core cross-sectional density required to eliminate deflection and tool drift when boring deep inside long-reach micro bores. The structural highlight is the S-type Screw Clamping mechanism. By locking the indexable insert directly through its counter-sunk center hole with an industrial Torx screw, the holder head remains completely sleek and obstruction-free. This completely eliminates the need for bulky top clamps or finger plates that trigger disastrous chip nesting in small diameters, thereby opening wide, unhindered chip flutes for curly swarf to escape smoothly from a 16mm minimum bore diameter.
Engineered with a unique X-type customized approach lead angle combined with a B-type 5-degree normal insert relief alignment, this tool holder delivers exceptional clearance when tracking severe internal tapers, extreme reverse reliefs, and intricate undercut profiles where standard 93° bars would mechanically rub or crash. The pocket seat is machined to micron-level tolerances to host standard 35-degree diamond positive inserts with a 5-degree relief angle, specifically the VBMT 110302 / VBMT 110304 / VBMT 110308 series. When combined with advanced sharp-edged multi-layer coatings and chipbreakers (such as -VF for super-fine finish cycles or -MV for universal medium-finishing), this tooling assembly delivers crisp shearing mechanics, superior chip breaking control, and flawless surface tracking across heavy-duty B2B manufacturing operations.
Model Nomenclature Decoder: S12M-SVXBR11 (ISO / National Standard Chart Compliant)
Operating reverse profiling cycles or left-hand toolpaths on sub-spindles?
Switch to the Mirror S12M-SVXBL11 (Left Hand) Tool Bar →2. Product Core Advantages
- Extreme X-Type Clearance Design: Specifically engineered to navigate tight reverse tapers and internal undercuts where common 93° tool bars fail.
- Flush Screw-Down Clamping Profile: The center Torx lock eliminates external clamping hardware, keeping the tool head ultra-slim for micro-bore evacuation.
- Vacuum-Tempered Alloy Shank: Hardened structural steel tool body core (HRC 42-45) effectively dampens harmonic micro-chatter over full 150mm extensions.
- True VBMT 5° Relief Seating Pocket: Machined with zero-tolerance indexing to secure positive VBMT 1103 inserts firmly against intense multi-axis cutting loads.
- Industrial Anti-Corrosion Armor: Premium black chemical oxide coat prevents hot, abrasive steel swarf from welding onto or eroding the pocket walls.
- Superior Micro-Bore Passability: Enables precise 35° rhombic profiling and complex back-chamfering cycles inside strict 16mm bore entries.
3. Technical Specification Parameters & Model Comparison
| Technical Blueprint Field | Metric Blueprint Value (S12M-SVXBR11) | Imperial Inch Equivalent Model Reference |
|---|---|---|
| Clamping Shank Diameter (φ d) | 12 mm | 0.4724 inches (Fits standard 12mm metric turrets or 1/2-inch boring holders using precision split reduction sleeves) |
| Overall Tool Length (L) | 150 mm | 5.9055 inches total tool length (M-Type industrial medium-reach standard) |
| Minimum Machining Bore (φ Dmin) | 16 mm | 0.6299 inches entry clearance line for micro-profiling safety |
| Compatible Indexable Insert Sizing | VBMT 110302 / VBMT 110304 / VBMT 110308 | VBMT 330.5 / VBMT 331 / VBMT 332 (Positive 35-degree rhombic with 5° relief standard) |
| Matching Fasteners & Spares Included | Premium M2.5 Torx Insert Screw & Flag-Type Torx T8 Wrench | Standard globally interchangeable industrial S-type hardware assembly |
Industrial Cutting Feed & Speed Data Recommendation Table
| ISO Workpiece Material Group | Cutting Speed (Vc) Range | Recommended Feed Rate (fn) |
|---|---|---|
| Mild / Carbon Steel (P-Class / AISI 1020 / 1045) | 100 - 180 m/min | 0.03 - 0.12 mm/rev |
| Alloy Steel / Tool Steel (P-Class / 4140 / SCM440) | 70 - 140 m/min | 0.03 - 0.10 mm/rev |
| Austenitic Stainless Steels (M-Class / SS304 / SS316) | 50 - 110 m/min | 0.02 - 0.08 mm/rev |
| Cast Irons / Nodular Irons (K-Class / G25 / GGG40) | 80 - 160 m/min | 0.04 - 0.15 mm/rev |
4. Product Application Scenarios
- Complex Internal Back-Boring: Sweeps backward cleanly out of pre-machined chambers to cut precise rear angles and internal tapers.
- Deep-Pocket Relief Profiling: Reaches comfortably into micro housings down to 16mm diameters to cut seal rings and retaining undercuts.
- Precision Thin-Walled Turning: Sharp positive rake cutting action minimizes cutting friction, keeping flexible thin bushings from warping out of round.
5. Equipment Tooling Compatibility Matrix
- 12mm / 1/2-inch Block Interface: Standard 12mm stem fits metric live turrets, multi-tool Swiss-type gang plates, or 1/2" imperial blocks via ground split bushings.
- ISO VBMT Sizing-11 Inserts: Pocket architecture strictly clamps all 35° diamond single-sided positive inserts designated by standard international codes **VBMT 1103--** or **VBIT 1103--**.
6. BEYOND Premium Carbide Grade Selection Guide
| BEYOND Cutting Insert Grade | Coating Micro-Structure Matrix | Primary Application Strengths |
|---|---|---|
| BYM11 (CVD Grade) | Thick Double-Layer Al2O3 + TiCN Thermal Barrier | Engineered for high-speed, continuous dry profiling of carbon steel and alloy liners. Highly resistant to crater wear under intense friction. |
| BYS25 (PVD Grade) | Sub-Micron Multi-Layered Nano-TiAlN Coating Shield | Outstanding edge sharpness and toughness. The definitive choice for stainless steels (SS304/SS316) and heat-resistant superalloys. |
| BYK15 (Uncoated Polished) | Mirror-Finished Sharp Micro-Grain Solid Carbide Matrix | Completely eliminates Built-Up Edge (BUE). Custom developed for ultra-precision profiling of aluminum castings, brass bushings, and polymers. |
7. Why Choose BEYOND CNC Machine Tools?
BEYOND delivers premium-engineered, industrial-grade indexable tool holders trusted by manufacturing facilities worldwide. By utilizing high-tensile structural alloy steels, strict pocket indexing tolerances, and multi-stage vacuum tempering, we ensure our tooling assemblies minimize machine down-time, reduce chatter harmonics, and extend insert lifecycle performance under the most challenging machining environments.
Global Machinist Operational Reviews
Marcus T. — United States
"Outstanding micro boring bar for back-boring oil seal chambers. The 12mm steel core is exceptionally rigid even when hanging out close to 4xD, and the unique X-clearing angle gets into tight undercuts beautifully without rubbing the rear flank. True pocket lock with standard VBMT 110304 inserts."
Dieter K. — Germany
"Hervorragende Geometrie für Sonderprofile! We machine custom relief paths into high-alloy injector bodies. The S-type flush lock is perfect; chips clear the small 17mm hole instantly without bird-nesting. Extremely precise pocket machining."
Yukihiro S. — Japan
"Perfect fit for our small gang-tool CNC lathes. The single center-screw indexing layout works flawlessly. Unlike clunky block clamps that gather chips in compact spaces, this flush bar leaves the chip flute open for mirror finishes."
Matteo R. — Italy
"Excellent back-turning and contouring bar for aerospace brass sleeves. Directs vibration straight down the spindle axis. Surface roughness is highly uniform when paired with ground VBMT profiling inserts."
Brent J. — Canada
"The micro head profile saved our production run on internal spline undercuts. Screw threads handle high locking pressure well without seizing. Highly recommend for any job shop needing clean relief sweeps."
8. AI-Style Engineering Support Engine (FAQ)
Q1: When should I choose the SVXBR tool holder over a traditional 93-degree SVUCR bar?
A1: You should select the SVXBR holder when executing aggressive back-boring, negative relief sweeps, or cutting deep internal ring seals. Standard 93° (SVUCR) holders lack the optimized head clearance required for back-turning, causing the rear steel body to collide with the internal walls of tight 16mm cavities.
Q2: Can I mount VCMT style inserts into this SVXBR11 tool holder?
A2: No. The letter 'B' in the 7th position of this tool model indicates it is meticulously ground with a 5-degree pocket relief slope. It is designed to fit VBMT 1103-- series inserts exclusively. Attempting to force a VCMT insert (which features a 7° relief angle) will misalign the seat, compromising tip structural stability and causing premature edge fracture.
Q3: What is the mechanical benefit of the S-type screw clamping system on a 12mm shank bar?
A3: In narrow 16mm bore holes, any projecting top clamp hardware physically chokes the tiny clearance envelope, entrapping hot stringy metal chips. The S-type center screw lock maintains a perfectly flush head profile, keeping the wide chip flutes clear so swarf can flush out instantly under coolant pressure.
9. Technical Maintenance & Troubleshooting Guidelines
Equivalent Industry Models
Interchangeable globally with standard international metric S12M-SVXBR11 internal profiling tool bars. For standard American imperial lathe cross-slides, this 12mm steel stem fits seamlessly inside standard 1/2-inch boring bar reduction sleeves or block clamping slots, using standard ANSI indexable positive insert designations VBMT 331 or VBMT 332.
Troubleshooting Tips
Micro-Chatter Lines in Fine Overhangs: Ensure the tool tip cutting center line sits perfectly inline with the lathe spindle rotation axis (±0.01mm). An off-center tip alters the active clearance angle, causing tool rubbing or sudden micro-chipping.
Screw Seizing / Pocket Galling: High friction heat from continuous internal profiling can weld particles. Clean the M2.5 seat regularly with an air line and apply a microscopic layer of high-temperature copper anti-seize paste to the thread body.
Workpiece Material Matrix
Fully optimized across standard B2B industrial manufacturing raw materials: P (Carbon, Low-Alloy & Pre-hardened Mild Steels), M (Austenitic, Ferritic & Duplex Stainless steel grades), K (Grey & Ductile Cast Irons), N (Precision Aluminum Blanks, Copper, Brass Alloys & Structural Polymers), and S (High-Temperature Superalloys & Titanium Alloys).
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.