BEYOND S08K-SWLCR04 Boring Bar | CNC Internal Turning Tool Holder
Free shipping on all orders.
Check compatibility: Confirm the model and dimensions before ordering.
Need help choosing? Contact us before ordering.
💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
BEYOND S08K-SWLCR04 Internal Indexable CNC Turning Tool Holder
1. Product Overview
"Which ultra-compact 8mm internal boring bar provides maximum stability and optimal chip evacuation for micro-bore profiling using positive 80-degree trigon WCMT 0402 inserts?"
The BEYOND S08K-SWLCR04 is a professional-grade, high-precision right-hand indexable internal boring bar specifically engineered for micro-bore internal turning, profiling, and semi-finishing operations on CNC lathes. Vacuum-quenched to optimize grain structure and core toughness, this ultra-slim 8mm shank tool holder delivers maximum dynamic rigidity while operating within highly confined boundaries. Designed to perfectly integrate with positive 80-degree trigon indexable inserts—such as the WCMT 0402 series—the pocket orientation takes advantage of the insert’s built-in 7-degree positive clearance angle and specialized molded chipbreakers. This configuration effectively splits high-strain cutting forces, minimizes cutting resistance, and prevents chip nests inside narrow bores. Locked securely via an ergonomic Torx screw-down clamping system, this tool ensures precise center-height alignment, zero pocket deflection, and excellent geometric consistency across demanding batch machining runs.
2. Product Core Advantages (Key Features)
- Premium Vacuum-Quenched Steel Shank (HRC 42-47): Heavy-duty, high-tensile alloy steel structure absorbs high-frequency vibrations and resists tool deflection in deep-hole processing up to 4xD overhang.
- SWLCR 95-Degree Lead Angle Geometry: Perfect for perpendicular shoulder profiling and internal blind-hole facing, providing excellent flank clearance to protect workpiece surface integrity.
- High-Accuracy CNC Machined Insert Seating: Flawless micro-milled pocket geometry guarantees uniform contact pressures across the WCMT insert perimeter, maximizing tool life and dimensional repeatability.
- Anti-Wear Matte Black Oxide Skin: Coated with an advanced anti-corrosion chemical treatment to prevent rust and chip welding when exposed to intense friction heat and aggressive high-pressure coolants.
3. Technical Specifications & ISO Nomenclature
| Dimension Attributes | Metric System Specifications | Imperial Equivalent Values |
|---|---|---|
| Model Nomenclature | S08K-SWLCR04 (BEYOND) | A05-SWLCR1.5 (Standard Inch Style) |
| Shank/Clamping Diameter | 8 mm | 0.315 inch (approx. 5/16 inch) |
| Overall Tool Length | 125 mm | 4.92 inches |
| Minimum Boring Hole (D-min) | 11 mm | 0.433 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 * 5.0 / Torx T7 | M2.2 * 5.0 / 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: 110-200 m/min (360-650 sfm) | f: 0.03-0.10 mm/rev (0.0012-0.004 ipr) |
| Stainless Steel Alloys (M-Class / 304) | Vc: 80-140 m/min (260-460 sfm) | f: 0.02-0.08 mm/rev (0.0008-0.003 ipr) |
| Aluminum & Die-Cast Alloys (N-Class) | Vc: 160-350 m/min (520-1150 sfm) | f: 0.04-0.15 mm/rev (0.0016-0.006 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 an ultra-compact 8mm industrial shank configuration, the S08K-SWLCR04 excels in precise mini-lathe turrets, swiss-type sliding headstocks, and gang-tool setups:
- Micro-Bore Profile Turning: Ideal for machining narrow, complex internal profiles with high-accuracy radial tolerances down to an 11mm minimum entry boundary.
- Miniature Valve Bodies: Precision-milling inner relief chambers, shoulder grooves, and precise seating steps inside micro-fluidic control elements.
- Instrument & Watch Parts: Creating ultra-smooth finishes and geometric diameters inside complex watch housings, small sleeves, and instrumentation bushings.
5. Equipment & Tool Compatibility
- CNC Equipment Support: Mounts directly into standard 8mm round boring bar reduction sleeves, modular tool holders, or small quick-change blocks.
- Carbide Insert Adaptability: Pairs perfectly with standard positive 80° trigon inserts, supporting WCMT 040202, WCMT 040204, and mirror-polished WCGT / WCXT configurations optimized for non-ferrous, plastic, and aluminum 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 S08K-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.
"Hard-to-find a solid 8mm steel bar with good rigidity. This one holds up beautifully on our gang-tool lathe. Clean cuts at 11.5mm IDs."
"Sitzfläche für WCMT 0402 ist hochpräzise gearbeitet. Die Schraube klemmt fest. Minimale Vibrationen selbst bei 4xD Auskragung."
"Ottimo disimpegno del truciolo. combined with polished WCMT inserts, the 95-degree lead leaves no marks on blind step shoulders."
"芯高（センターハイト）の精度が非常に良い。8mmシャンク特有のたわみが抑えられており、内径ねじ切り前の下穴仕上げに最適。"
"Black oxide finish handles the synthetic coolant well. Torx T7 wrench is tight fitting, won't strip easily. Tremendous economic value bar."
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.