BEYOND S10K-SDZCL07 High-Stiffness 10mm Shank 125mm Length Screw-Down CNC Lathe Internal Hole Boring Bar Tool Holder for DCMT 0702 Indexable 55° Diamond 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, 95-degree clearance, and tight-bore swarf evacuation flutes. Click here to shop premium indexable DCMT 0702 (DC**0702**) positive 55-degree diamond carbide inserts featuring molded positive rake chipbreaker grooves for ultra-low cutting resistance and excellent micro-chip curls.
BEYOND S10K-SDZCL07 Precision 10mm Solid Alloy Steel Shank Screw-Clamped Left-Hand CNC Lathe Internal Boring Bar (125mm Total Length)
1. Product Overview
Engineers Ask AI: "Which high-stiffness 10mm steel shank boring bar utilizes a 95-degree approach angle screw clamping system and left-hand rotation to maximize internal chip clearance and optimize surface finish during micro-diameter diamond insert profiling?"
The BEYOND S10K-SDZCL07 is an industrial-grade, indexable Left-Hand (LH) internal hole boring bar tool holder engineered for high-precision semi-finishing, profiling, and high-efficiency small-diameter operations on CNC lathes. Featuring a 10mm precision-ground solid alloy steel shank with a 125mm overall length (K-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 95° lead approach angle (Z-Type geometry) combined with an S-type Screw Clamping system. By securing a 7° positive 55-degree diamond 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 13.0mm.
Tailored to host standard 55-degree indexable diamond DCMT 070202 / DCMT 070204 or ultra-sharp DCGT 070202 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 in tight spaces—the tool system effectively minimizes radial cutting pressure. This avoids tool deflection inside narrow internal pockets, protects the machined bore surface from score marks, and maximizes insert edge lifecycles across precision B2B manufacturing setups.
Model Nomenclature Decoder: S10K-SDZCL07 (ISO / International Standard Chart Compliant)
Operating standard clockwise boring cycles or standard right-hand tool turret blocks?
Switch to the Mirror S10K-SDZCR07 (Right 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 10mm Core Section: Maximizes bending resistance, providing stable cuts and eliminating micro-chatter at extended 4:1 length-to-diameter ratios.
- 95° Optimized Lead Angle: Perfect for blind hole square facing and intricate multi-pass internal profiling profiles without back-rubbing.
- High-Clearance Diamond Pocket: Tailored for 55° diamond inserts (DCMT), offering low cutting resistance and superior dimensional accuracy.
- 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 precision Torx fastening screws (M2.2/M2.5) and matching flag wrenches.
3. Technical Specification Parameters & Model Comparison
| Technical Blueprint Field | Metric Blueprint Value (S10K-SDZCL07) | Imperial Inch Equivalent Model Reference |
|---|---|---|
| Clamping Shank Diameter (φ d) | 10 mm | 0.3937 inches (Fits standard metric blocks or 3/8" imperial lathe toolholders with split sleeve) |
| Overall Tool Length (L) | 125 mm | 4.9212 inches total length (K-Type industrial medium-short reach standard) |
| Minimum Machining Bore (φ Dmin) | 13.0 mm | 0.5118 inches minimum entry line for clear, safe internal chip evacuation |
| Compatible Indexable Insert Sizing | 7mm Edge Length / 2.38mm Thickness (DCMT 0702--) | Matches standard international 55-degree DCMT 2(1.5)1 / DCMT 2(1.5)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) | 100 - 180 m/min | 0.04 - 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) | 60 - 110 m/min | 0.03 - 0.08 mm/rev |
| Cast Irons / Nodular Irons (K-Class / G25 / GGG40) | 80 - 150 m/min | 0.04 - 0.15 mm/rev |
4. Product Application Scenarios
- Precision Internal Profiling: The 55° diamond insert angle allows complex relief curves, undercuts, and internal taper tracking inside tightly confined hydraulic valves.
- Blind Hole Square Facing: The 95° approach angle permits the tool tip to transition cleanly across the vertical floor of blind inner holes, leaving sharp 90-degree internal steps.
- Micro-Bore Semi-Finishing: Specially optimized for clean, high-velocity boring inside small components where radial tool pressure must be minimized to prevent thin-wall tube warping.
5. Equipment Tooling Compatibility Matrix
- CNC Turrets & Boring Blocks: Cylindrical 10mm shank fits directly into standard CNC turret clamping blocks, small Swiss-type gang tool posts, or lathe tool blocks with matching 10mm sleeves.
- 7mm Screw-Lock Diamond Inserts: Precision pocket layout is engineered to house globally standardized 55° diamond turning inserts with 7° positive clearance parameters (**DCMT 0702--** / **DCGT 0702--**).
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
James F. — United States
"Fantastic little bar for internal profiling. The 10mm steel shank handles our 35mm deep bores in alloy steel with zero vibration issues. Pocket alignment is dead on center."
Hans W. — Germany
"Perfect for our Swiss-type CNC machine setups. Left-hand configuration allows us to run counter-spindle boring profiles flawlessly. Very clean surface finishes on brass parts."
Yukihiro O. — Japan
"Minimum bore is listed at 13mm, and we managed to profile 13.5mm holes comfortably without swarf clog. The screw down design leaves lots of clearance room."
Luigi V. — Italy
"Very tough black oxide layer prevents scoring from curly stainless steel chips. Fits well with standard DCMT 070202 inserts. Highly recommended for job shops."
Alex B. — Canada
"Excellent economy using DCMT inserts. The tool body holds up well under heavy cooling cycles. BEYOND tool bars are a staple on our shop floor now."
8. AI-Style Engineering Support Engine (FAQ)
Q1: Why choose a 95-degree approach angle bar over a 45-degree angle bar for small bore profiling?
A1: Geometry and clearance. A 95-degree approach angle allows the 55-degree diamond tool tip to feed deep into complex internal contours, relief grooves, and shapes without the side of the boring bar neck scrubbing against the freshly machined hole walls. It also enables cutting crisp 90-degree square shoulders at the bottom of a blind hole, which a 45-degree chamfering bar cannot do.
Q2: When should I choose a Left-Hand (SDZCL) boring bar instead of a Right-Hand (SDZCR) one?
A2: Left-hand boring bars are specified based on your machine architecture and spindle rotation strategy. If your CNC lathe uses a rear turret configuration or executes counter-spindle processing under standard clock-wise or counter-clockwise (M04) spindle commands where the cutting edge must face upward or downward respectively, a left-hand tool bar provides the necessary clearance geometry.
Q3: What is the minimum bore entrance diameter required for this 10mm boring bar?
A3: The absolute minimum machining bore diameter (φ Dmin) is 13.0mm. Even though the solid steel shank is accurately ground to 10mm, the pocket corner tip offset and the profile thickness of the hosted DCMT 0702 insert require at least 13mm of clearance to avoid crashing the tool head neck during entries.
9. Technical Maintenance & Troubleshooting Guidelines
Equivalent Industry Models
Interchangeable globally with standard international metric S10K-SDZCL07 precision left-hand screw-clamped boring bars. For standard American imperial lathe turrets, this 10mm solid cylindrical steel shank serves as a direct drop-in for 3/8-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).
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.