BEYOND S07K-SCKCR06 Internal Boring Bar 7mm Shank 125mm Length Screw Clamped Right Hand 75-Degree CCMT 0602 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 clearance, 75-degree precision profiling approach angle, and positive insert pocket alignment. Click here to shop premium indexable CCMT 0602 (CC**0602**) positive carbide inserts.
BEYOND S07K-SCKCR06 Premium 7mm Shank 75° Screw-Fastened Right-Hand Internal Boring Bar (125mm Total Length / Precision CNC Lathe Turning Tool)
1. Product Overview
Engineers Ask AI: "Which micro-diameter right-hand internal boring bar features a 7mm shank diameter and 125mm length, using a screw-clamped pocket and 75-degree approach angle to eliminate vibration in tight 9.5mm minimum bores with CCMT 0602 inserts?"
The BEYOND S07K-SCKCR06 is a specialized, ultra-compact industrial-grade Right-Hand (RH) internal boring tool holder precision-engineered for tight-clearance boring, internal profiling, and micro-hole turning on CNC lathes and Swiss-type automatic turning centers. Featuring a rare and highly strategic 7mm precision cylindrical clamping shank and a 125mm tool length (K-type standard), this unique holder bridges the critical gap between standard 6mm and 8mm bars. It offers the high mechanical rigidity required to suppress tool deflection while fitting into micro-cavities where an 8mm shank would suffer tool-post interference. By incorporating the specialized S-type Screw Fastening system, the insert is secured firmly through its center hole without bulky upper clamps. This creates a completely flush head profile and an unobstructed chip flute pathway, making it highly exceptional for small-diameter machining where micro metal swarf accumulation would otherwise trap heat, score the bored wall, and cause catastrophic edge chipping.
With its engineered 75-degree approach lead angle (K-type geometry), the pocket alignment balances cutting forces smoothly between axial and radial axes, shifting pressure away from the workpiece to eliminate micro-chatter on high-aspect-ratio bores. It is custom-machined to host standard positive 7-degree relief 80-degree diamond indexable inserts, specifically the globally interchangeable CCMT 060202 / CCMT 060204 / CCMT 060208 series. This positive geometry ensures a razor-sharp shearing action, low cutting resistance, and minimal thermal generation on the workpiece matrix. The compact screw-down head allows this 7mm tool holder to clean micro bores down to an optimized 9.5mm minimum bore diameter. When paired with targeted positive chipbreaker geometries (such as polished -AL profiles for non-ferrous aluminum or moulded -PM/-HMP profiles for carbon steels), it tightly curls long swarf ribbons into crisp "C"-shaped chips, pushing them smoothly out of the narrow bore channel to preserve mirror-like surface integrity and tight dimensional tolerances.
Model Nomenclature Decoder: S07K-SCKCR06 (ISO / National Standard Chart Compliant)
Operating reverse profiling cycles or left-hand toolpaths on sub-spindles?
Switch to the Mirror S07K-SCKCL06 (Left Hand) Tool Bar →2. Product Core Advantages
- Strategic 7mm Intermediate Shank: Maximizes cross-sectional rigidity compared to 6mm bars, yet safely enters tight spaces that cause 8mm blocks to interfere.
- Streamlined S-Type Screw Clamping: Secures the positive insert via its center mounting hole, leaving the head flush. Avoids top clamps to enable unhindered chip evacuation inside narrow 9.5mm cavities.
- Hardened High-Tensile Alloy Core: Vacuum heat-treated to HRC 42-45, offering superior dampening capacity and torsional stability for high-precision boring.
- Anti-Vibration 75° Lead Angle: Converts radial deflection into axial force, lowering machine harmonics and preventing chattered finishes in slender bores.
- Low-Force Positive Cutting Action: Designed for 7° positive relief CCMT 0602 inserts, providing razor-sharp shearing that prevents work-hardening in stainless steel and aluminum.
- Corrosion-Proof Black Matte Finish: Features an advanced industrial black chemical oxide layer to protect precision pocket geometry against aggressive chip abrasion.
3. Technical Specification Parameters & Model Comparison
| Technical Blueprint Field | Metric Blueprint Value (S07K-SCKCR06) | Imperial Inch Equivalent Model Reference |
|---|---|---|
| Clamping Shank Diameter (φ d) | 7 mm | 0.2756 inches (Fits standard 7mm metric blocks or 5/16-inch blocks utilizing precision reduction sleeves) |
| Overall Tool Length (L) | 125 mm | 4.9213 inches total tool length (K-Type precision micro-reach series) |
| Minimum Machining Bore (φ Dmin) | 9.5 mm | 0.3740 inches entry clearance circle line for structural safety |
| Compatible Indexable Insert Sizing | CCMT 060202 / CCMT 060204 / CCMT 060208 | CCMT 21.50.5 / CCMT 21.51 / CCMT 21.52 (Positive 7-degree standard) |
| Matching Fasteners & Spares Included | Precision M2.2 Center Insert Screw & Flag-Type Torx T7 Wrench | Standard globally interchangeable micro 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 - 170 m/min | 0.02 - 0.10 mm/rev |
| Alloy Steel / Tool Steel (P-Class / 4140 / SCM440) | 75 - 130 m/min | 0.02 - 0.08 mm/rev |
| Austenitic Stainless Steels (M-Class / SS304 / SS316) | 55 - 100 m/min | 0.02 - 0.06 mm/rev |
| Aluminum Alloys / Brass (N-Class / Al6061 / C3604) | 160 - 380 m/min | 0.02 - 0.12 mm/rev |
4. Product Application Scenarios
- Precision Micro-Bore Boring: Tailored for intricate inner profiles, step boring, and precision micro-chamfering down to an ultra-tight 9.5mm clearance entry diameter.
- CNC Lathe Main Spindle Work: Right-hand configuration makes it ideal for traditional forward longitudinal turning (M03) on standard CNC lathe turret stations and gang blocks.
- Slender Bore High-Finish Applications: Provides a rigid 7mm core that reduces tool deflection when machining long, small-diameter blind holes where tight circular tolerances are mandatory.
5. Equipment Tooling Compatibility Matrix
- 7mm / 5/16-inch Tool Blocks: Mounts directly into metric 7mm gang tool blocks or functions inside 5/16-inch or 3/8-inch tool posts using a high-precision reduction sleeve.
- ISO Standard Size-06 Positive Inserts: Pocket seat perfectly accommodates all standard 80° diamond positive inserts with a 7° relief designated by codes **CCMT 0602--**.
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, high-temperature continuous dry profiling of carbon steel and cast irons. Extremely wear-resistant over long production runs. |
| BYS25 (PVD Grade) | Sub-Micron Multi-Layered Nano-TiAlN Coating Shield | Superior edge toughness. Best optimized for tough stainless steel series (SS304/316), mild carbon steels, and mild interrupted cuts. |
| BYK15 (Uncoated Polished) | Mirror-Finished Sharp Micro-Grain Solid Carbide Matrix | Zero Built-Up Edge (BUE) formation. Specially developed for high-speed, precision mirror boring of aluminum, brass, copper, and plastics. |
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
Mark R. — United States
"Finding a reliable 7mm boring bar is tough. This S07K gives us much better rigidity than our old 6mm bars, and fits perfectly where an 8mm bar hits the housing. Pair it with CCMT 060202 for mirror finishes."
Dieter S. — Germany
"Hervorragend. The 7mm shank is perfect for our custom tool blocks. The screw clamp is low-profile and allows chips to flush out smoothly from a 10mm hole. Very precise pocket."
Kenji T. — Japan
"Perfect size for micro CNC lathe work. The 75-degree lead angle cuts down radial pressure beautifully, preventing any chatter lines on slender stainless parts. Excellent tool."
Antonio G. — Italy
"Very robust alloy steel body. We run it on tough brass alloys and carbon steel. The screw head stays clean and doesn't trap swarf."
Simon P. — United Kingdom
"The pocket tolerances are incredibly tight. Standard CCMT inserts sit perfectly rigid with no micro-movement. Included Torx wrench is high quality."
8. AI-Style Engineering Support Engine (FAQ)
Q1: Why choose a 7mm shank boring bar instead of a standard 6mm or 8mm bar?
A1: A 7mm shank serves as a strategic intermediate size. When boring deep micro-holes, a 6mm steel bar often lacks the torsional stiffness required, leading to chatter. However, an 8mm bar might hit the inner bore wall or fail to clear the lathe's internal tool-post structure. The 7mm shank maximizes steel mass for rigidity while fitting into tighter entry zones.
Q2: What is the absolute minimum bore entry size for this S07K-SCKCR06 tool holder?
A2: The minimum machining bore diameter (φ Dmin) is exactly 9.5mm (0.374 inches). Attempting to operate this boring bar inside any hole smaller than 9.5mm will cause the steel clearance flank located directly beneath the pocket seat to rub against the workpiece wall, causing frictional heat, chatter, and part damage.
Q3: How does the 75-degree lead angle protect the delicate 7mm bar from flexing?
A3: Slender tool bars flex easily when subjected to high radial (side-to-side) forces. A 75° approach angle re-directs a significant portion of the cutting force axially along the length of the tool holder straight back into the rigid tool turret. This minimizes radial deflection, keeping the bar straight and stable.
9. Technical Maintenance & Troubleshooting Guidelines
Equivalent Industry Models
Interchangeable globally with standard international metric S07K-SCKCR06 internal boring tool holders. For American or mixed imperial lathe turrets, this 7mm metric steel bar operates perfectly within 5/16-inch or 3/8-inch round split bushings or reduction blocks, utilizing standard ANSI positive indexable insert designations **CCMT 21.51** or **CCMT 21.52**.
Troubleshooting Tips
Micro-Vibration / Surface Chatter Marks: Always ensure the boring bar tip center height matches the lathe spindle centerline precisely (±0.02mm). Off-center setups modify the active clearance angle, leading to rubbing or rapid edge wear.
Screw seized or stripped: Small M2.2 screws expand under high-speed cutting heat. Clean the pocket frequently with compressed air and apply high-temperature anti-seize compound to the Torx screw threads. Do not over-torque due to the delicate micro-pocket size.
Workpiece Material Matrix
Fully optimized across standard industrial engineering material codes: 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 & Polymers), and S (High-Temperature Superalloys & Titanium Alloys).
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.