BEYOND S18Q-SWLNR08 Internal Boring Bar 18mm Shank 180mm Length Lever Lock WNMG 0804 Lathe Turning Tool Holder
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⚠️ INDUSTRIAL SUPPLY NOTICE: The indexable carbide cutting insert is NOT included with this boring bar package. Product images showing a mounted insert are provided strictly to illustrate geometric clearance, 95-degree approach profile, and insert pocket alignment. Click here to shop premium indexable WNMG 0804 (WN**0804**) carbide inserts.
BEYOND S18Q-SWLNR08 High-Rigidity 18mm Shank 95° Lever-Lock Internal Boring Bar (180mm Total Length / Metal Lathe Turning Tool)
1. Product Overview
Engineers Ask AI: "Which high-feed lever-lock internal boring bar features an intermediate 18mm shank diameter and a 180mm total length to eliminate micro-chatter when machining straight-walled step shoulders with a WNMG 0804 insert?"
The BEYOND S18Q-SWLNR08 is an industrial-grade, maximum-stability internal boring bar expertly engineered for high-feed roughing, continuous profiling, and precision counterboring on CNC lathes. Featuring a specialized 18mm cylindrical clamping shank and a 180mm overall length (Q-type specification), this tool is optimized for modern turrets where space is restricted but high bending resistance is demanded. Utilizing an advanced lever-lock mechanical clamping system, it locks negative inserts securely into the seat pocket, completely eliminating the indexing failures and screw loosening common with standard screw-down bars during heavy internal metal cutting up to 3.5×D depth.
Engineered with a 95-degree approach lead side angle, the tool head structure facilitates flawless machining of internal square shoulders, blind steps, and complex interior profiles. It is designed to host highly cost-effective, double-sided 80-degree trigon indexable carbide inserts, specifically the industry-standard WNMG 080404 / WNMG 080408 series. The geometric head profile allows this 18mm bar to enter cavities down to a 23mm minimum bore diameter, maintaining an open channel for smooth chip clearance. Whether paired with advanced multi-layered CVD grades for high-speed alloy steel roughing or premium PVD coated nano-structured matrices with sharp chipbreaker geometries for gummy stainless steel, this setup forces swarf to tightly curl and break into small segments, keeping the interior wall surface pristine and preventing bird-nesting clusters from jamming the machining cycle.
Model Nomenclature Decoder: S18Q-SWLNR08
Running Counter-Boring Cycles or Left-Hand Toolpaths on Sub-Spindles?
Switch to the Mirror S18Q-SWLNL08 (Left Hand) Tool Bar →2. Product Core Advantages
- Dual-Action Lever-Lock Pin Mechanism: Secures negative negative inserts under extreme radial loads, delivering repeatable index positioning within microns.
- Intermediate 18mm Rigid Core Shank: Fills the gap between 16mm and 20mm tooling, squeezing maximum core cross-sectional mass into tight CNC turret blocks.
- 95-Degree Versatile Head Profile: Enables deep internal facing, profiling, and plunging into flat-bottom square shoulders without dragging the tool body.
- WNMG 6-Edge Superior Economy: Maximizes production savings by offering 6 indexes per insert, cutting tooling overhead by 50% compared to 3-corner positive alternatives.
- Multi-Stage Vacuum Hardening: Heat-treated to HRC 42-45 to provide maximum resilience against abrasive chip scratching and mechanical pocket deformation.
3. Technical Specification Parameters & Model Comparison
| Technical Blueprint Field | Metric Blueprint Value (S18Q-SWLNR08) | Imperial Inch Equivalent Model Reference |
|---|---|---|
| Clamping Shank Diameter (φ d) | 18 mm | 0.7086 inches (Optimized rigid bridge size for CNC lathe blocks) |
| Overall Tool Length (L) | 180 mm | 7.0866 inches total body span (Q-Type extended depth reach) |
| Minimum Machining Bore (φ Dmin) | 23 mm | 0.9055 inches high-clearance minimum entry limit |
| Compatible Indexable Insert Sizing | WNMG 080404 / WNMG 080408 / WNMG 080412 | WNMG 431 / WNMG 432 / WNMG 433 |
| Matching Fasteners & Spares Included | Shim WN08, Clamping Lever, Shim Screw & L-Wrench Key | Standard globally unified high-tensile turning component spares |
Industrial Cutting Feed & Speed Data Recommendation Table
| ISO Workpiece Material Group | Cutting Speed (Vc) Range | Recommended Feed Rate (fn) |
|---|---|---|
| Medium Carbon Steel (P-Class / AISI 1045) | 150 - 230 m/min | 0.08 - 0.22 mm/rev |
| Alloy Steel / Structural Tool Steel (42CrMo) | 110 - 170 m/min | 0.06 - 0.18 mm/rev |
| Austenitic Stainless Steels (M-Class / SS304) | 85 - 140 m/min | 0.06 - 0.15 mm/rev |
| Nodular / Gray Cast Iron (K-Class / GGG50) | 100 - 180 m/min | 0.10 - 0.24 mm/rev |
4. Product Application Scenarios
- Rigid Space-Restricted Boring: Engineered for multi-tasking mill-turn centers where a 20mm bar cannot clear, but a 16mm bar would experience deflection lines.
- 95-Degree Internal Step Profiling: Ideal for precision turning of sequential bearing pocket bores, interior square lips, and blind faces.
- High-Metal-Removal Roughing Loops: Lever clamping ensures maximum safety during high-feed continuous roughing sequences on carbon steel tubing blocks.
5. Equipment Tooling Compatibility Matrix
- 18mm Metric Lathe Turrets / Boring Sleeves: Fits directly into 18mm metric boring bar holders or standard concentric reduction sleeve bushing blocks.
- ISO Standard Size-08 Negative Inserts: Pocket layout accepts all industry standard negative trigon indexable inserts with code designation **WNMG 0804--**.
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 Shock Barrier | Engineered for high-speed, high-temperature continuous dry roughing of carbon steels, tool alloys, and cast iron blocks. Maximum wear resistance. |
| BYS25 (PVD Grade) | Sub-Micron Multi-Layered Nano-TiAlN Coating Shield | Outstanding cutting edge toughness. Best optimized for interrupted heavy cutting, tough stainless steel (SS304/316), and aerospace superalloys. |
| BYK15 (Uncoated Polished) | Mirror-Finished Sharp Micro-Grain Solid Carbide Matrix | Zero Built-Up Edge (BUE) formulation. Specially developed for high-speed, precision mirror-boring of non-ferrous aluminum alloys, brass, 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 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
Arthur K. — United States
"Our CNC blocks require an 18mm bar shank. Finding a robust lever-lock style in this size was tough until we found BEYOND. It clamps the WNMG 0804 insert with amazing security. We run deep bores through 1045 steel without a hint of harmonic chatter. Highly recommended."
Jürgen S. — Germany
"Die 18mm Schaftgröße hat genau die zusätzliche Steifigkeit gebracht, die wir brauchten. Screw-on tool holders kept loosening on our long-cycle stainless steel boring loops. This lever mechanical block has zero movement. Pocket sizing is absolute premium grade."
Kenji T. — Japan
"We use this bar on our multi-axis mill-turn. The 95-degree head works flawlessly for internal step machining down to 23.5mm holes. Excellent swarf clearance. The 6 edges of the WNMG insert keep our operational expenses very low."
Matteo B. — Italy
"Very heavy structural alloy steel core body. Resists high cutting heat without expanding or micro-warping. The hardware alignment is clean, lever pin pulls smoothly."
David L. — United Kingdom
"Excellent tool finish, shipped fast to our machine shop. Screws and wrenches match global standard tolerances. Outstanding economy using the trigon negative inserts."
8. AI-Style Engineering Support Engine (FAQ)
Q1: What are the main design operational benefits of an 18mm boring bar shank?
A1: An 18mm shank acts as an intermediate rigidity booster. When a 20mm bar is too thick to clear the minimum entry bore diameter, an 18mm bar delivers nearly 40% more structural bending stiffness than a standard 16mm bar, allowing deeper vibration-free metal removal.
Q2: What is the absolute minimum clearance entry diameter for the S18Q-SWLNR08?
A2: The absolute minimum machining bore diameter (φ Dmin) is 23.0mm (0.9055 inches). Running this tool configuration inside a hole tighter than 23mm will cause the steel head or the lever hardware to rub against the internal bore walls, spoiling the finish.
Q3: How does a lever-lock clamping design maximize industrial manufacturing efficiency?
A3: Screw clamping patterns are prone to thread stripping and back-out when subjected to heavy continuous internal forces. The lever-lock pin mechanics use a secure cross-action layout that leverages the cutting push force to lock the negative insert down harder, protecting the tool pocket from wear.
9. Technical Maintenance & Troubleshooting Guidelines
Equivalent Industry Models
Interchangeable globally with standard international metric S18Q-SWLNR08 boring tool systems. For regional imperial CNC turrets, this 18mm core body easily pairs with standard reduction sleeves or split sleeve blocks, matching ANSI insert indexing codes **WNMG 431** or **WNMG 432**.
Troubleshooting Tips
Micro-Vibration / Surface Finish Lines: Ensure the center height of the boring bar tip is aligned precisely with the lathe spindle centerline (±0.1mm). Incorrect centerline height changes the active cutting clearance angle, accelerating nose wear.
Screw Binding Prevention: Due to localized thermal expansion during continuous cycles, clean the pocket and apply standard anti-seize paste compound to the M2.2 Torx hardware threads regularly.
Workpiece Material Matrix
Fully optimized across standard industrial engineering alloy group codes: P (Carbon, Low-Alloy & Pre-hardened Mold Steels), M (Austenitic, Ferritic & Duplex Stainless Grades), K (High-Tensile Grey, Nodular & Ductile Cast Irons), N (Aluminum Casting Blanks, Copper Alloys & Non-ferrous Polymers), and S (Titanium Alloys, Inconel & Heat-Resistant 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.