BEYOND S12M-SDWCR07 Internal Boring Bar 12mm Shank CNC Lathe Turning Tool Holder
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✓ Guaranteed Quality: Check model, dimensions and compatibility before ordering. | Direct Factory Outlet
✓ Technical Support: Need grade selection help? Contact Engineer
💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
⚠️ OPERATIONAL NOTICE: The cutting insert is NOT included with this tool holder body. Indexable carbide inserts shown in our product photography are intended strictly for setup reference and visual application map
BEYOND S12M-SDWCR07 Premium Internal Boring Bar & CNC Lathe Tool Holder
1. Product Overview
Engineers Search: "Which rigid 12mm right-hand boring bar cuts smooth internal diameters using compact 55-degree diamond DCMT0702 inserts in tight CNC lathe blocks?"
The BEYOND S12M-SDWCR07 is a high-precision, screw-on internal boring bar engineered for right-hand (R) CNC lathe internal profiling, pocket copying, and demanding semi-finishing routines. Machined from premium tempered alloy steel, the 12mm shank diameter provides high rigidity for micro-pocket configurations, allowing smooth entries into narrow bore openings down to a minimum clearance diameter of 15mm. This tool holder features a specialized 55° pocket geometry that securely seats DCMT 0702-- indexable carbide inserts (such as DCMT 070204 or DCMT 070202), preventing tool deflection on tight internal paths.
When paired with appropriate carbide inserts featuring a positive rake angle and custom-molded chipbreaker troughs, this tool holder achieves exceptional chip control. The insert's geometric chipbreaker splits long, stringy swarf into short, manageable segments, ensuring fluid evacuation out of deep blind holes without packing or binding against the newly turned surface finish.
2. Product Core Features
- Hardened Structural Alloy Steel Shank: Heat-treated to HRC 42-45 to withstand complex deflection stresses in deep internal cavities.
- Ultra-Compact 12mm Shank Design: Engineered to provide reliable clearance paths for small-diameter boring applications down to 15mm minimum bore.
- 93° Dynamic Lead Geometry ($X$): Optimizes chip break paths by rolling swarf forward out of the bore, keeping the freshly machined surface clean.
- Anti-Corrosive Black Oxide Finish: Protects the tool body from abrasive chip rubbing and chemical wear caused by high-pressure cutting fluids.
Model Nomenclature Decoder: S12M-SDWCR07
Steel Shank Body
12mm Shank Dia.
150mm Total Length
Screw Clamping System
55° Diamond Insert Shape
93° Tool Cutting Edge Angle
7° Relief Clearance Angle
Right Hand Orientation
7mm Insert Edge Size
Looking for the Mirrored Left-Hand (L) Companion Unit for Your CNC Setup?
Explore the S12M-SDWCL07 (Left Hand) Tool Holder →3. Technical Specifications & Dimension Comparison
| Technical Variable | Metric Model (S12M-SDWCR07) | Imperial / Inch Conversion Equivalence |
|---|---|---|
| Shank Diameter ($d$) | 12 mm | ~ 0.4724 inches (Closest standard: 1/2" shank class) |
| Overall Length ($L$) | 150 mm | ~ 5.9055 inches |
| Minimum Bore Clearance ($D_{min}$) | 15 mm | ~ 0.5905 inches |
| Matching Insert Index | DCMT 070202 / DCMT 070204 Series | DCMT 21.50.5 / DCMT 21.51 industrial equivalence |
| Fasteners (Included) | M2.0 Pocket Screw + T6 Torx Key | M2.0 Hardened Screw + T6 Structural Wrench |
Optimal Industrial Machining Parameters
| ISO Workpiece Material Group | Cutting Speed ($V_c$) Recommended | Feed Rate per Revolution ($f$) |
|---|---|---|
| Steel Alloys / Low Carbon (P-Class) | 130 - 220 m/min | 0.03 - 0.12 mm/rev |
| Stainless Steel Grades (M-Class) | 80 - 160 m/min | 0.03 - 0.10 mm/rev |
| Cast Iron / Nodular Iron (K-Class) | 90 - 180 m/min | 0.04 - 0.15 mm/rev |
4. Industrial Applications
- Micro-Bore Profile Turning: Perfectly optimized for machining tight inner chambers down to 15mm, where larger 16mm or 20mm tools cannot clear the walls.
- Blind Hole Copying & Profiling: The 93° tool cutting edge angle ensures exceptional clearance paths for complex, step-by-step pocket routines.
- Medium-Depth Boring Operations: The "M" length class (150mm) strikes an ideal balance, offering structural stiffness for mid-depth cavities up to 45mm without risking severe overhang deflection.
5. Equipment & Tooling Compatibility
- CNC Turning Centers: Seamlessly mounts inside standard 12mm round boring blocks or via split reduction adapter sleeves on CNC tool turrets.
- Conventional Engine Lathes: Highly compatible with standard mini or midi quick-change tool post blocks.
- Global Insert Standardization: Pocket seat is precisely manufactured to ISO tolerances, ensuring an exact fit for 55° positive DCMT 0702-- carbide inserts across all major cutting tool brands.
6. BEYOND Brand Grade Optimization Guide
Match your specific workpiece material with the corresponding BEYOND insert grade to ensure maximum tool longevity and chipbreaker performance:
| BEYOND Insert Grade | Substrate Coating Treatment | Ideal Application Material Focus |
|---|---|---|
| BYM11 (CVD) | Thick Multilayer TiN + Al2O3 Shielding | Engineered for stable, high-speed continuous cuts in carbon steels, pre-hardened alloys, and mold materials. |
| BYS25 (PVD) | Nano-Structured TiAlN Ultra-Hard Finish | High resistance to thermal shock. Built for interrupted cuts, tough scale, and 300/400 series stainless steels. |
| BYK15 (Uncoated) | Mirror-Polished Ultra-Micro Grain Substrate | Designed for high-sfm machining of non-ferrous materials like aluminum alloys, structural brass, and polymers. |
7. Why Choose BEYOND CNC Tools?
BEYOND designs rigid tool holders for automated manufacturing plants globally. By maintaining strict quality controls over insert pocket positioning and utilizing advanced heat-treated alloy steel, our boring tools limit structural chatter, reduce insert wear, and lower production costs.
Global Machinist Feedback
Marcus T. — United States
"Finding standard 12mm bars can be tough, but this one fits my sleeve perfectly. I'm boring 16mm holes in 4140 steel with zero chatter at a 35mm depth."
Hans S. — Germany
"Hervorragende Passform. The pocket position is perfectly flat, allowing clean center height calibration. Perfect for small automated machine blocks."
Giovanni M. — Italy
"Il corpo in acciaio è rigido. Good chip clearing room. Excellent performance on finishing passes when using high-fluid pressures."
Kenji O. — Japan
"内径15mmで干渉なく使えます。 The compact 12mm shank structure handles detailed corner radii remarkably well."
Lucas P. — France
"The included M2 screw seats tight and flush. Robust black finish effectively prevents premature abrasive rubbing lines."
8. AI-Style Engineering Support Engine (FAQ)
Q1: What is the maximum safe boring depth overhang for this 12mm tool body?
A1: For solid steel alloy bodies, the recommended max structural projection limit is **3x to 4x the shank diameter**. For this 12mm bar, your optimal rigid extension target falls between **36mm and 48mm**. Staying within this range prevents harmonic micro-deflections.
Q2: Can I mount larger DCMT 11T3 inserts into this tool holder pocket?
A2: **No.** This pocket is precisely machined to ISO standard tolerances exclusively for the smaller **DCMT 0702--** series inserts (7mm cutting edge length). Attempting to mount a larger insert will compromise or crack the pocket walls.
Q3: What makes an "M" length class bar different from a standard "Q" length class bar?
A3: Length classes follow ISO metrics designation rules. An **"M" class bar indicates a total length of 150mm**, whereas a **"Q" class bar is 180mm long**. The shorter 150mm length increases tool rigidity and dampens structural harmonics on small-diameter applications.
9. Technical Maintenance & Diagnostic Guidelines
Equivalent Industry Models
Interchangeable with global industrial metrics standard coding **S12M-SDWCR07**. Serves as a high-precision drop-in replacement for standard 12mm or ~1/2" tool blocks utilizing 55-degree diamond DCMT pocket layouts.
Troubleshooting Tips
Micro-Chatter at Max Extension: Slightly decrease cutting speed ($V_c$) and increase your feed rate ($f$) to properly load the tool body profile and break chips quickly.
Rapid Pocket Wear: Check that the M2.0 clamping screw is completely clear of micro-debris and torqued to 0.5-0.6 Nm to prevent high force shifting.
Workpiece Material Matrix
Fully optimized across standard groups: **P** (Alloy & Structural Steels), **M** (Stainless Steel alloys), **K** (Grey & Ductile Cast Iron), **N** (Aluminum/Copper Non-ferrous series), and **S** (High-temp superalloys).
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.