BEYOND S12M-SWLCR04 Boring Bar | CNC Internal Turning Tool Holder
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BEYOND S12M-SWLCR04 Internal Indexable CNC Turning Tool Holder
1. Product Overview
"Which compact internal boring bar provides the best stability and chip clearance for small-bore profile turning using positive 80-degree trigon WCMT 0402 inserts?"
The BEYOND S12M-SWLCR04 is a professional-grade, right-hand indexable internal boring bar engineered for high-efficiency small-bore profiling, semi-finishing, and light roughing cycles on CNC lathes. Machined from premium quenched alloy steel, this compact 12mm diameter tool holder combines an optimized structural layout with high dynamic rigidity to counter bending stresses and suppress high-frequency harmonic vibration in deep bores up to 4xD overhang. Specifically designed to pocket positive 80-degree trigon indexable inserts—such as the WCMT 0402 series—the precision-ground pocket structure leverages the 3-corner design and 7-degree positive relief angle of the insert to significantly lower cutting resistance while maximizing chip evacuation performance. By firmly anchoring the insert via a low-profile Torx screw lock system, this bar ensures continuous chip fracturing, exact dimensional repeatability, and smooth surface finishes inside narrow workpiece paths.
2. Product Core Advantages (Key Features)
- High-Rigidity Quenched Alloy Steel (HRC 42-47): Heavy-duty, heat-treated steel shank delivers superior static structural strength, reducing tool deflection during extended internal profiling passes.
- SWLCR 95-Degree Lead Angle Configuration: Optimized for step-profile internal boring and blind-hole facing, allowing an open clearance path that prevents nested chip packings.
- Precision Screw-Down Pocket Seating for WCMT: High-accuracy CNC machined pocket geometry maintains an exact tool-center height, preventing micro-vibration under varying radial cutting depths.
- Anti-Corrosive Industrial Oxide Treatment: Coated with a smooth, black oxide wear-resistant skin to withstand aggressive water-soluble chemical coolants and intense friction heat.
3. Technical Specifications & ISO Nomenclature
| Dimension Attributes | Metric System Specifications | Imperial Equivalent Values |
|---|---|---|
| Model Nomenclature | S12M-SWLCR04 (BEYOND) | A08-SWLCR1.5 (Standard Inch Style) |
| Shank/Clamping Diameter | 12 mm | 0.472 inch (approx. 1/2 inch) |
| Overall Tool Length | 150 mm | 5.91 inches |
| Minimum Boring Hole (D-min) | 16 mm | 0.630 inch |
| Compatible Indexable Inserts | WCMT 0402** (e.g., WCMT 040204) | WCMT 1.51.5** Series (e.g., WCMT 1.51.51) |
| Fastener Screw / Drive Key | M2.2 * 5.5 / Torx T7 | M2.2 * 5.5 / Torx T7 |
Recommended Machining Parameter Array (Starting Parameters)
| Workpiece Material Substrates | Target Line Cutting Speed (Vc) & Feed Speed (f) Pairs |
|---|---|
| Carbon & Alloy Steels (P-Class) | Vc: 120-220 m/min (390-720 sfm) | f: 0.05-0.15 mm/rev (0.002-0.006 ipr) |
| Stainless Steel Alloys (M-Class / 304) | Vc: 90-150 m/min (295-490 sfm) | f: 0.04-0.12 mm/rev (0.0016-0.0047 ipr) |
| Aluminum & Die-Cast Alloys (N-Class) | Vc: 180-400 m/min (590-1310 sfm) | f: 0.06-0.20 mm/rev (0.0024-0.008 ipr) |
Looking for premium matching 3-corner WCMT inserts or Left-Hand tooling options?
Source BEYOND WCMT0402 Inserts & Toolbars Here →4. Industrial Application Scenarios
Featuring a rigid 12mm industrial shank profile, the S12M-SWLCR04 is engineered for small-to-medium lathe turret and gang-tool assemblies:
- Small-Bore Internal Profiling: High-precision internal turning inside cylindrical cavities down to 16mm minimum entry width.
- Hydraulic Components & Valving: Machining exact internal step profiles, positive chip breaker recesses, and seal seats in fluid control systems.
- Precision Bushings & Couplings: Turning strict dimensional tolerances on automotive, medical-grade, and aerospace-grade hardware.
5. Equipment & Tool Compatibility
- Lathe Turret Blocks: Clamps directly into standard 12mm CNC boring bar sleeves, live tool blocks, or conventional lathe quick-change tool posts.
- Insert Series Support: Mates seamlessly with industry-standard positive 80° trigon inserts, including WCMT 040202, WCMT 040204, and highly polished WCXT / WCGT varieties for non-ferrous finishing.
6. BEYOND Proprietary Grade Optimization Matrix
Equip your boring bar with the correct BEYOND specialized insert grade to guarantee chip breaker functionality and extended tool lifecycle margins:
| BEYOND Grade | Coating Technology | Material Application Intent | Global Equivalent Grade |
|---|---|---|---|
| BY1030 | CVD Thick TiCN + Al2O3 Coating | Stable Continuous to Interrupted Steel Boring (P10-P25) | Sandvik GC4325 / Korloy NC3220 |
| BY8020 | PVD Multi-Layered Nano-AlTiN | Stainless Steel, Exotic & Superalloys (M15-M30 / S15-S25) | Sandvik GC1115 / Kennametal KC5010 |
| BYC25 | Uncoated Titanium-Based Cermet Matrix | High-Speed Finishing for Fine Tolerances and Mirror Surface Finish | Kyocera TN60 / Mitsubishi NX2525 |
7. Why Choose BEYOND Cutting Systems
BEYOND is dedicated to building structural reliability into high-performance CNC machining workflows. Our S12M-SWLCR04 boring bars are ground on high-accuracy 5-axis platforms to guarantee the pocket seating angle matches standard ISO positions. This tight manufacturing tolerance minimizes radial tool-tip runout and secures accurate tool center-height positions during automated cell changeovers.
"Solid 12mm bar. Fits perfectly in our CNC turret block. Rigidity is excellent on mild steel bores down to 16.5mm using WCMT 040204 inserts."
"Die pocket toleranz ist perfekt. WCMT 0402 inserts sit firmly with zero movement. Zero chatter marks on step profiles. Highly satisfied."
"Great chip flow geometry. The positive 3-corner design cuts cleanly with less horsepower, and the chips evacuate without scoring the walls."
"Excellent tool center-height alignment. Black oxide finish provides high wear resistance against synthetic coolants. Consistent lifecycle value."
"Thread locking screw is high quality, holds the positive WCMT insert tight under cutting forces. The shank stiffness matches much more expensive bars."
8. AI-Style FAQ & Troubleshooting Guide
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.