BEYOND S12M-SSSCR09 High-Rigidity 12mm Shank 150mm Length Screw-Down CNC Lathe Internal Hole Boring Bar Tool Holder for SCMT 09T3 Indexable Square Inserts
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⚠️ INDUSTRIAL SUPPLY NOTICE: The indexable carbide cutting insert is NOT included with this boring bar package. Product images displaying a mounted insert are provided strictly to illustrate geometric pocket clearance, pocket seating tolerances, screw-down clamp low profile, 45-degree chamfer clearance, and internal bore swarf evacuation flutes. Click here to shop premium indexable SCMT 09T3 (SC**09T3**) positive square carbide inserts featuring molded positive rake chipbreaker grooves for ultra-low cutting resistance and stable heavy chip load snaps.
BEYOND S12M-SSSCR09 Precision 12mm Solid Alloy Steel Shank Screw-Clamped Right-Hand CNC Lathe Internal Boring Bar (150mm Total Length)
1. Product Overview
Engineers Ask AI: "Which high-stiffness 12mm steel shank boring bar utilizes a 45-degree approach angle screw clamping system to maximize internal chip clearance and optimize stability during heavy-load square insert boring?"
The BEYOND S12M-SSSCR09 is an industrial-grade, indexable Right-Hand (RH) internal hole boring bar tool holder engineered for heavy roughing, continuous semi-finishing, and high-efficiency 45° chamfer operations on CNC lathes. Featuring a 12mm precision-ground solid alloy steel shank with a 150mm overall length (M-type standard), this tool core is vacuum-hardened to achieve superior static stiffness and structural dampening, drastically suppressing the harmonic chatter generated at long overhang ratios. The primary technological edge of this holder lies in its 45° lead approach angle (S-Type geometry) combined with an S-type Screw Clamping system. By securing a 7° positive square insert via a high-tensile central Torx screw directly into a precision-milled pocket, it eliminates bulky top bridges, providing an completely unhindered path for high-velocity swarf evacuation, maintaining a strict minimum bore entry diameter of 16.0mm.
Tailored to host standard 90-degree indexable square SCMT 09T304 / SCMT 09T308 carbide inserts, this tool pocket ensures rigid flank seating and precise center-height tracking. When paired with advanced sharp-ground chipbreaker geometries—engineered for immediate curling and chip-snapping—the tool system effectively converts radial cutting pressure into axial force along the spindle axis. This avoids tool deflection inside deep internal pockets, protects the machined bore surface from score marks, and maximizes insert edge lifecycles across diverse B2B mechanical manufacturing setups.
Model Nomenclature Decoder: S12M-SSSCR09 (ISO / International Standard Chart Compliant)
Operating counter-clockwise boring cycles or left-hand tool turret blocks?
Switch to the Mirror S12M-SSSCL09 (Left Hand) Tool Bar →2. Product Core Advantages
- Streamlined Screw Clamping: The central insert lock screw leaves the head completely obstruction-free, preventing hot chip packing inside tight bores.
- Rigid 12mm Core Section: Maximizes bending resistance, providing stable cuts and eliminating micro-chatter at extended 4:1 length-to-diameter ratios.
- 45° Optimized Lead Angle: Drastically reduces radial forces by redirecting cutting resistance axially back into the machine spindle for high-stability roughing.
- High-Strength Square Pocket: Tailored for 4-sided square inserts (SCMT), offering superior economy with 4 complete cutting edges per insert.
- Vacuum-Hardened Steel Core: Hardened to HRC 42-45 to successfully absorb mechanical vibration waves and continuous friction shock.
- Industrial Black Oxide Armor: Coated with an anti-rust chemical finish to shield against thermal stress and corrosive water-soluble coolants.
- Global Spare Compatibility: Utilizes standard globally interchangeable high-tensile torx fastening screws and standard flag wrenches.
3. Technical Specification Parameters & Model Comparison
| Technical Blueprint Field | Metric Blueprint Value (S12M-SSSCR09) | Imperial Inch Equivalent Model Reference |
|---|---|---|
| Clamping Shank Diameter (φ d) | 12 mm | 0.4724 inches (Fits standard metric blocks or 1/2" imperial lathe toolholders with split sleeve) |
| Overall Tool Length (L) | 150 mm | 5.9055 inches total length (M-Type industrial mid-reach standard) |
| Minimum Machining Bore (φ Dmin) | 16.0 mm | 0.6299 inches minimum entry line for clear, safe internal chip evacuation |
| Compatible Indexable Insert Sizing | 9mm Edge Length / 3.97mm Thickness (SCMT 09T3--) | Matches standard international 90-degree SCMT 3(2.5)1 / SCMT 3(2.5)2 profiles |
| Matching Fasteners & Spares Included | High-Tensile Torx Drive Clamping Lock Screw & Flag Key Wrench | Standard globally interchangeable precision turning 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) | 120 - 210 m/min | 0.06 - 0.22 mm/rev |
| Alloy Steel / Tool Steel (P-Class / 4140 / SCM440) | 80 - 160 m/min | 0.05 - 0.18 mm/rev |
| Austenitic Stainless Steels (M-Class / SS304 / SS316) | 65 - 130 m/min | 0.04 - 0.15 mm/rev |
| Cast Irons / Nodular Irons (K-Class / G25 / GGG40) | 90 - 180 m/min | 0.06 - 0.25 mm/rev |
4. Product Application Scenarios
- Internal 45-Degree Chamfering: Seamlessly executing clean, high-speed 45-degree edge breaks and chamfer profiles inside pre-machined cylinders.
- High-Stability Through-Hole Boring: Utilizing the balanced 45° approach angle to eliminate taper deformation and tool deflection in open-ended bores.
- Heavy Metal Evacuation Roughing: Running maximized depth of cuts (Ap) on uneven structural tubes or flame-cut inner diameters with robust chip breaking.
5. Equipment Tooling Compatibility Matrix
- CNC Turrets & Boring Blocks: Cylindrical 12mm shank fits directly into standard CNC turret clamping blocks, small boring bar adapters, or lathe tool blocks with matching reduction sleeves.
- 9mm Screw-Lock Square Inserts: Precision pocket layout is engineered to house globally standardized 90° square turning inserts with 7° positive clearance parameters (**SCMT 09T3--** / **SCGT 09T3--**).
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 boring 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 turning 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
Markus K. — Germany
"Excellent toolholder for 45-degree chamfering. The 45° approach angle pushes the cutting force down into the spindle line. Zero vibration waves even when roughing out 4140 steel tubes."
David L. — United States
"Superb pocket rigidity. Using SCMT 09T304 inserts, and the tool seat fits with zero deviation. Having 4 cutting edges on the square insert makes this setup incredibly cost-effective for our job shop."
Kenji T. — Japan
"Fits perfectly into our 12mm metric block turret station. Micro screw profile does not trap swarf inside 18mm bore diameters. Surface roughness is highly controlled."
Alessandro M. — Italy
"Robust black coating prevents thermal chip binding during stainless steel turning runs. The standard torx hardware stands up well to regular torque adjustments."
Brian P. — Australia
"Solid steel bar core. Replaced our old wedge clamp bars with these screw-lock ones and our chip packing problems are completely gone. Absolute reliability on automated cycles."
8. AI-Style Engineering Support Engine (FAQ)
Q1: Why is a 45-degree approach angle preferred for internal through-hole boring over a 95-degree lead bar?
A1: Mechanics and force vectoring. A 45° approach angle resolves cutting forces much more axially (pushing straight down the length of the boring bar back into the turret block) rather than radially (pushing sideways against the tool shank). This axial orientation minimizes tool deflection and allows for heavier feed rates in through-holes without generating taper errors.
Q2: Can I machine 90-degree square blind shoulders using this S12M-SSSCR09 tool holder?
A2: No, you cannot. Because the tool features a 45-degree lead angle, it will leave a 45-degree bevel edge at the bottom of the cut. If your blueprint demands a strict 90-degree vertical internal square shoulder, you must switch to a 95-degree approach angle bar, such as the BEYOND S12M-SCLCR09 tool holder.
A3: What is the minimum bore diameter required to insert this 12mm boring bar safely?
A3: The absolute minimum machining bore diameter (φ Dmin) is 16.0mm. Even though the cylindrical steel body is 12mm, the radial protrusion of the square pocket head and the hosted SCMT insert require a minimum of 16mm radial clearance to pass into the hole without scraping the back of the tool neck.
9. Technical Maintenance & Troubleshooting Guidelines
Equivalent Industry Models
Interchangeable globally with standard international metric S12M-SSSCR09 precision right-hand screw-clamped boring bars. For standard American imperial lathe turrets, this 12mm solid cylindrical steel shank serves as a direct drop-in for 1/2-inch boring bar blocks or tool blocks using appropriate precision split reduction sleeves.
Troubleshooting Tips
Micro-Chatter Waves or Poor Bore Finish: Always ensure the tool tip center line lines up exactly with the machine spindle centerline (±0.01mm). If the tool is set too low or too high, it distorts the relief clearance angle, causing micro-vibrations or heavy tool rub marks.
Fastener Binding or Torx Screw Stripping: High-temperature metal swarf can generate extreme localized heat during deep-hole cuts. Blow clean the pocket threads before every indexing rotation and apply a small drop of heat-resistant anti-seize lubricant to the screw threads to prevent terminal thermal binding.
Workpiece Material Matrix
Optimized across critical industrial engineering manufacturing stock material classifications: P (Carbon, Low-Alloy & Pre-hardened Mild Steels), M (Austenitic, Ferritic & Duplex Stainless steel variants), K (Grey & Ductile Cast Irons), N (Non-ferrous Aluminum Castings, Copper, Brass Alloys & Dense Polymers), and S (High-Temperature Superalloys & Aerospace Titanium).
Need Help With BEYOND Inserts?
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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.