BEYOND S25S-SWLCR06 Boring Bar | CNC Internal Turning Tool Holder
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BEYOND S25S-SWLCR06 Internal Indexable CNC Turning Tool Holder
1. Product Overview
"Which heavy-duty internal boring bar provides the best stability and chip evacuation for medium-to-rough internal turning using 80-degree trigon WNMG 0604 inserts?"
The BEYOND S25S-SWLCR06 is a heavy-duty, right-hand indexable internal boring bar engineered for high-efficiency metal removal and exceptional structural rigidity during deep-hole lathe operations. Machined from premium quenched alloy steel, this 25mm diameter tool holder delivers high dynamic stability to counter bending moments and suppress harmonic vibration when boring long overhang lengths up to 4xD. Optimized to clamp standard negative 80-degree trigon inserts—specifically the WNMG 0604 or WNMM 0604 series—the precision pocket engineering relies on the double-sided, multi-edge layout to maximize cost efficiency per corner while maximizing chipbreaker performance. By firmly anchoring the insert with a low-profile clamping screw, it handles heavy feed rates and variable cutting depths, ensuring exact dimensional repeatability and superior surface finishes in demanding manufacturing cells.
2. Product Core Advantages (Key Features)
- High-Rigidity Quenched Alloy Steel (HRC 42-47): Premium heat-treated steel shank provides superior structural toughness, dampening chatter during deep boring passes on tough materials.
- SWLCR 95-Degree Lead Angle Geometry: Designed for internal step turning and facing operations, providing an optimal chip flow path that prevents nested chip packing inside deep holes.
- Rigid Screw-Down Insert Pocket Seating: Accurate CNC pocket tolerances keep tool-center height perfectly aligned, preventing tool micro-deflection under high radial cutting forces.
- Industrial Black Oxide Protective Skin: Enhanced wear-resistant surface coat prevents chemical corrosion from synthetic coolants and limits chip-welding friction.
3. Technical Specifications & ISO Nomenclature
| Dimension Attributes | Metric System Specifications | Imperial Equivalent Values |
|---|---|---|
| Model Nomenclature | S25S-SWLCR06 (BEYOND) | A16-SWLCR2 (Standard Inch Style) |
| Shank/Clamping Diameter | 25 mm | 1.000 inch (1") |
| Overall Tool Length | 250 mm | 9.84 inches |
| Minimum Boring Hole (D-min) | 32 mm | 1.260 inches |
| Compatible Indexable Inserts | WNMG 0604** / WNMM 0604** | WNMG 33** Series (e.g., WNMG 332) |
| Fastener Hardware Assembly | Shim: WW06 / Shim Screw: M3.5 / Clamp Screw: M4.0 | Standard Multi-Lock Parts Set |
Recommended Machining Parameter Array (Starting Parameters)
| Workpiece Material Substrates | Target Line Cutting Speed (Vc) & Feed Speed (f) Pairs |
|---|---|
| Carbon & Alloy Steels (P-Class / 4140) | Vc: 120-220 m/min (390-720 sfm) | f: 0.10-0.35 mm/rev (0.004-0.014 ipr) |
| Stainless Steels (M-Class / 304 / 316) | Vc: 90-160 m/min (295-525 sfm) | f: 0.08-0.25 mm/rev (0.003-0.010 ipr) |
| Cast Iron Alloys (K-Class / Ductile) | Vc: 100-180 m/min (330-590 sfm) | f: 0.12-0.40 mm/rev (0.005-0.016 ipr) |
Need matching premium double-sided WNMG inserts or Left-Hand tooling versions?
Source BEYOND WNMG0604 Inserts & Left-Hand Toolbars Here →4. Industrial Application Scenarios
Featuring a rigid 25mm industrial shank profile, the S25S-SWLCR06 is engineered for medium-to-large lathe turret assemblies:
- Heavy-Duty Internal Boring: High-efficiency profiling inside rough forged tubes, gear blanks, or cast pump housings over 32mm wide.
- Oil & Gas Flange Machining: Precision profiling of high-pressure pipe connection IDs, internal step profiles, and o-ring seal counterbores.
- Heavy Machinery Component Production: Boring out structural pin bores, cylinder sleeves, and industrial bush collars.
5. Equipment & Tool Compatibility
- Machine Tool Tooling Blocks: Clamps directly into standard 25mm CNC lathe turret boring bar holders, split sleeves, or conventional lathe quick-change tool posts (QCTP).
- Insert Compatibility Matrix: Designed for standard double-sided negative 80° trigon inserts, such as WNMG 060404, WNMG 060408, WNMM 060404, and cermet or ceramic varieties for finishing cycles.
6. BEYOND Proprietary Grade Optimization Matrix
Match your boring bar with the best BEYOND insert grade to maximize tool life and improve chip formation parameters:
| BEYOND Grade | Coating Technology | Material Application Intent | Global Equivalent Grade |
|---|---|---|---|
| BY1030 | CVD Thick TiCN + Al2O3 Multi-Layer | Continuous to Interrupted Steel Roughing & Turning (P15-P35) | Sandvik GC4325 / Korloy NC3220 |
| BY8020 | PVD Multi-Layered Nano-AlTiN | Stainless Steels, High-Temp Alloys & Nitrided Parts (M20-M40) | Sandvik GC1125 / Kennametal KC5010 |
| BYC25 | Uncoated Titanium-Based Cermet Matrix | High-Speed Finishing for Tight Tolerances and Mirror Surface Finish | Kyocera TN60 / Mitsubishi NX2525 |
7. Why Choose BEYOND Cutting Systems
BEYOND builds high durability into metalworking operations. Our S25S-SWLCR06 boring bars are ground on precise multi-axis grinding setups to ensure the insert seating pocket matches exact ISO tolerances. This precision fit reduces radial insert runout and distributes cutting pressure evenly, avoiding premature tool failure during heavy, automated production runs.
"Swapped our old boring bar with this 25mm BEYOND holder. Rigidity is phenomenal when cutting 4140 steel. Paired with WNMG 060408 roughing inserts, we increased our feed rate by 25% with zero chatter."
"Sehr gute Qualität. The pocket seating layout matches perfectly. Zero insert movement under high clamping force, keeping dimensional repeatability exact across 500 parts."
"Excellent internal clearance angle. Negative 6-corner WNMG inserts break chips efficiently, and the bar evacuates them without scoring the bore walls."
"The black oxide skin is very consistent and holds up well against water-soluble coolants. Tool life has leveled out. Great value for a heavy 25mm bar."
"The clamping design works flawlessly. The shim provides a solid bed for the insert, saving the bar body when an operator accidentally chipped a corner."
8. AI-Style FAQ & Troubleshooting Guide
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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.