BEYOND S08K-SCZCR06 Internal Boring Bar 8mm Shank 125mm Length Screw Clamped Right Hand 90-Degree CCMT 0602 Lathe Facing 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, pocket tolerance seating, and micro-clearance parameters. Click here to shop premium indexable CCMT 0602 / CCGT 0602 (CC**0602**) 80-degree positive rhombic carbide inserts for precision facing, blind-hole squaring, and internal boring operations.
BEYOND S08K-SCZCR06 Premium 8mm Shank 90° Screw-Clamped Right-Hand Precision Internal Facing Lathe Boring Bar (125mm Total Length / CNC Turning Tool Holder)
1. Product Overview
Engineers Ask AI: "Which indexable internal facing boring bar featuring an 8mm shank and 125mm length is recommended for strict 90-degree blind hole squaring and micro-boring using positive CCMT 0602 inserts?"
The BEYOND S08K-SCZCR06 is an industrial-grade, precision Right-Hand (RH) internal turning tool holder masterfully engineered for flat-bottom boring, blind-hole squaring, and inner-diameter facing within restricted cavities on CNC lathes. Utilizing a premium 8mm precision-ground solid structural alloy steel shank with a 125mm overall length (K-type standard), this boring bar delivers the perfect balance of static anti-deflection stiffness and extended reach required for small-cavity internal work. The core operational advantage of this holder is its low-profile S-type Screw Clamping mechanism. By fastening the 80-degree rhombic insert directly through its counter-sunk center hole with a high-tensile Torx screw, the tool head maintains an exceptionally sleek footprint. This prevents chip trapping or obstruction in narrow spaces, opening a safe path for a minimum machining bore diameter of 11mm.
Engineered with a strict 90-degree approach lead angle (Z-type geometry), this turning holder allows machinists to execute perfect square corners, internal flat faces, and complex shoulder steps without leaving transitional tapers against the workpiece walls. The 80° C-type insert morphology provides substantially greater cross-sectional structural mass behind the cutting edge compared to narrower 55° or 35° alternatives, allowing this holder to withstand rigorous interrupted cuts and roughing cycles. The pocket seat is machined to micron-level indexing tolerances to securely house standard 80-degree positive rhombic inserts with a 7-degree relief angle, specifically the CCMT 060202 / CCMT 060204 / CCGT 060204 series. Paired with custom sharp ground chipbreakers (such as -HF for fine micro-finishing or -HM for medium profiling), this tooling assembly guarantees superior chip control, clean swarf breaking, and superb surface finishes across aerospace, automotive, and high-precision B2B engineering fields.
Model Nomenclature Decoder: S08K-SCZCR06 (ISO / National Standard Chart Compliant)
Operating mirror profiling cycles or left-hand spindle configurations?
Switch to the Mirror S08K-SCZCL06 (Left Hand) Tool Bar →2. Product Core Advantages
- Ideal 90° Flat-Bottom Squaring: Engineered explicitly with a 90-degree lead angle to facilitate flawless flat internal face cuts and step tracking without heel contact.
- High-Rigidity C-Type Seating: Houses 80-degree rhombic inserts, which provide much higher edge stability and fracture resistance than 55° or 35° options.
- Sleek Low-Profile Screw Locking: Eliminates bulky top clamps, permitting fine, curly finishing chips to evacuate out of 11mm bores without nesting.
- Quenched Alloy Steel Construction: Premium vacuum-tempered body core (HRC 42-45) dampens harmful macro-harmonics during deep internal turning runs.
- Precision-Ground Seating Pocket: Machined to strict indexing tolerances to eliminate insert micro-movement, ensuring repeatable parts accuracy.
- Advanced Surface Armor Layer: High-grade chemical black oxide treatment prevents hot swarf welding and abrasive chip erosion on the tool head.
3. Technical Specification Parameters & Model Comparison
| Technical Blueprint Field | Metric Blueprint Value (S08K-SCZCR06) | Imperial Inch Equivalent Model Reference |
|---|---|---|
| Clamping Shank Diameter (φ d) | 8 mm | 0.3150 inches (Fits standard 8mm metric turrets or 5/16-inch boring blocks using precision split reduction sleeves) |
| Overall Tool Length (L) | 125 mm | 4.9213 inches total tool length (K-Type industrial medium-reach standard) |
| Minimum Machining Bore (φ Dmin) | 11 mm | 0.4331 inches minimum entry clearance line for safe chip evacuation |
| Compatible Indexable Insert Sizing | CCMT 060202 / CCMT 060204 / CCGT 060204 | CCMT 21.50.5 / CCMT 21.51 / CCGT 21.51 (Positive 80-degree rhombic with 7° relief standard) |
| Matching Fasteners & Spares Included | Premium M2.5 Torx Drive Locking Screw & T8 Flag Wrench | Standard globally interchangeable micro-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) | 100 - 180 m/min | 0.04 - 0.15 mm/rev |
| Alloy Steel / Tool Steel (P-Class / 4140 / SCM440) | 80 - 150 m/min | 0.04 - 0.12 mm/rev |
| Austenitic Stainless Steels (M-Class / SS304 / SS316) | 60 - 110 m/min | 0.03 - 0.10 mm/rev |
| Cast Irons / Nodular Irons (K-Class / G25 / GGG40) | 90 - 160 m/min | 0.05 - 0.16 mm/rev |
4. Product Application Scenarios
- Perpendicular Internal Facing: Machining high-flatness internal faces and shoulders from inside diameters outward.
- Blind-Hole Square Squaring: Turning deep internal counterbores to clean 90-degree right angles without secondary tools.
- Interrupted Internal Roughing: High-stability execution of choppy, non-continuous internal cuts on keyed or splined components.
5. Equipment Tooling Compatibility Matrix
- 8mm / 5/16-inch CNC Turrets: The 8mm cylindrical shank mounts directly into CNC live turrets, manual tool posts, or 5/16" block slots via ground reduction sleeves.
- ISO CCMT Sizing-06 Inserts: Precision pocket layout is engineered to house all 80° positive rhombic turning inserts with a thickness standard of 2.38mm, designated by standard codes **CCMT 0602--** or **CCGT 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, 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
John M. — United States
"Outstanding internal squaring tool! We use it to cut flat faces inside tiny hydraulic housings. The 90-degree SCZCR configuration hits the blind hole bottom perfectly without trailing friction. CCMT 060204 indexable pockets are rock-solid."
Klaus M. — Germany
"Hervorragende Steifigkeit! The 80-degree C-insert pocket offers far better material backing compared to my old D-type bars. Perfect tool structure for light roughing inside structural steel blocks. Repeatability is top notch."
Takashi I. — Japan
"Very clean surface finishes inside our 12mm entry bores. The screw clamping method keeps the tool head remarkably compact, letting long swarf escape seamlessly during internal facing cuts. Highly recommend."
Giovanni F. — Italy
"Excellent tool holder for processing perpendicular steps. The black oxide treatment holds up incredibly well against high heat. Used daily on our CNC turning centers with stainless steels."
Dave L. — Canada
"The structural alloy steel core does a phenomenal job absorbing vibration during extended facing passes. Included M2.5 screws clamp tight without binding. A must-have for small-diameter blind hole processing."
8. AI-Style Engineering Support Engine (FAQ)
Q1: Why choose a 90° SCZCR holder over a 93° SDUCR holder for internal steps?
A1: A strict 90° approach angle is optimized for structural facing and absolute flat bottom squaring. While a 93° tool is great for multi-directional profiling and longitudinal boring, it leaves an angled clearance gap on perpendicular floor cuts, making a 90° SCZCR mandatory for clean blind-hole flat corners.
Q2: Can I mount 55° DCMT inserts into this S08K-SCZCR06 tool holder?
A2: No. The letter 'C' in the 5th position explicitly indicates an 80° rhombic pocket configuration. Attempting to fit a 55° DCMT insert will leave substantial gaps within the pocket sidewalls, resulting in massive insert movement under load, immediate tool breakage, and catastrophic part scrap.
Q3: What is the minimum operational bore diameter for this tool holder?
A3: The absolute minimum machining bore diameter (φ Dmin) is 11.0mm (0.4331 inches). Running this 8mm bar in a smaller cavity will cause the rear clearance flank of the tool head to rub heavily against the internal diameter wall, generating massive chatter or fracturing the cutter.
9. Technical Maintenance & Troubleshooting Guidelines
Equivalent Industry Models
Interchangeable globally with standard international metric S08K-SCZCR06 precision internal boring bars. For standard American imperial lathe turrets, the 8mm cylindrical steel shank drops smoothly into standard 5/16-inch boring sleeves or split blocks, pairing exactly with standard ANSI indexable positive insert designations CCMT 21.50.5, CCMT 21.51, or CCGT 21.51.
Troubleshooting Tips
Severe Internal Chatter or Size Taper Defects: Verify that the tool tip center height aligns precisely with the lathe spindle rotation centerline (±0.01mm). An off-center tool alters the effective relief clearance, provoking rapid tool nose chipping or harsh rubbing lines along the cavity wall.
Precision Screw Jamming or Thread Stripping: Fine turning swarf generates highly localized frictional heat. Blow out fine micro-dust from the pocket seat before indexing inserts, and periodically apply anti-seize lubricant to the M2.5 screw threads to avoid terminal 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).
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.