BEYOND S20R-SWLCR06 Boring Bar | CNC Internal Turning Tool Holder
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BEYOND S20R-SWLCR06 Left-Hand CNC Internal Turning Tool Holder
1. Product Overview
"Which left-hand internal boring bar offers the highest stability and chip control when profiling blind holes using 80° trigon WCMT or WCGT 06T3 inserts?"
The BEYOND S20R-SWLCR06 is a heavy-duty, industrial-grade left-hand indexable internal boring bar specifically engineered for high-precision CNC lathe applications. Machined from premium quenched alloy steel, this tool holder features a $95^\circ$ approach angle profile that optimizes cutting forces during internal face profiling, boring, and forward copy turning. By stabilizing standard 80° trigon inserts—such as the WCMT 06T3__ or WCGT 06T3__ series—it ensures precise rigid alignment. This geometric stability allows micro-grain carbide substrates and advanced chipbreaker grooves (like ground aluminum -AK or medium steel -PM configurations) to perform at peak material removal rates (MRR) without chatter, delivering exceptional surface finishes in tight internal bores.
2. Product Core Advantages (Key Features)
- High-Tensile Quenched Steel Body (HRC 42–47): Premium heat-treated alloy steel construction drastically dampens harmonic vibration, allowing reliable boring performance up to 4xD depth extension.
- Optimized SWLCR $95^\circ$ Clearance Geometry: Engineered to provide an ideal chip evacuation path during blind hole boring, preventing chip nesting and eliminating wall scoring.
- Precision Screw-Down Clamping System: High-torque Torx screw system anchors the 80° trigon insert perfectly into the hardened pocket seat to completely eliminate micro-movements under interrupted loads.
- Matte Black Oxide Finish: Provides industrial-grade rust and corrosion protection against aggressive synthetic coolants and high-temperature cutting fluids.
3. Technical Specifications & ISO Nomenclature
| Dimension Attributes | Metric System Specifications | Imperial Equivalent Values |
|---|---|---|
| Model Nomenclature | S20R-SWLCR06 (BEYOND) | A12M-SWLCR2 |
| Shank Diameter ($d$) | 20 mm | 0.750 inch (3/4") |
| Overall Tool Length ($L$) | 200 mm | 7.87 inches |
| Minimum Boring Hole ($D_{\min}$) | 25 mm | 0.984 inch |
| Compatible Indexable Inserts | WCMT 06T3__ / WCGT 06T3__ | WCMT 22.1_ / WCGT 22.1_ |
| Fastener Screw / Drive Key | M2.5 * 6 / Torx T8 | M2.5 * 6 / Torx T8 |
Recommended Machining Parameter Array (Starting Parameters)
| Workpiece Material Substrates | Target Line Cutting Speed ($v_c$) & Feed Speed ($f$) Pairs |
|---|---|
| Mild & Alloy Steels (P-Metal Group) | $v_c$: 130–220 m/min (425–720 sfm) | $f$: 0.05–0.18 mm/rev (0.002–0.007 ipr) |
| Stainless Steels (M-Metal / Austenitic) | $v_c$: 80–150 m/min (260–490 sfm) | $f$: 0.05–0.15 mm/rev (0.002–0.006 ipr) |
| Aluminum Alloys & Non-Ferrous (N-Metal) | $v_c$: 200–500 m/min (650–1640 sfm) | $f$: 0.08–0.25 mm/rev (0.003–0.010 ipr) |
Need premium matching indexable inserts or the corresponding Right-Hand version?
Source BEYOND® WCMT06T3 Inserts & Right-Hand Toolbars Here →4. Industrial Application Scenarios
The versatile 20mm shank configuration balances rigidity and compact bore clearance, making the left-handed S20R-SWLCR06 excellent for high-volume CNC engineering setups processing:
- Blind Hole Boring: Efficient clearance profiling of small-to-medium internal chambers where step shoulders demand a $95^\circ$ lead track.
- Hydraulic Manifolds: High-precision finish machining of multi-tier internal valve bodies and cylinder sleeves.
- Custom Aluminum Hubs: Rapid, high-speed internal pocket turning paired with high-polished, large-rake non-ferrous inserts.
5. Equipment & Tool Compatibility
- CNC Equipment Integration: Clamps directly into metric 20mm tooling blocks, VDI static tool positions, or regular engine lathe quick-change tool posts (QCTP) utilizing standard reducing bushings.
- Insert Cross-Compatibility: The precision ISO pocket perfectly accepts major industrial brands of WCMT 06T304, WCMT 06T308, WCGT 06T304, and WCGT 06T302 shapes.
6. BEYOND Proprietary Grade Optimization Matrix
Pair your SWLCR toolholder with the correct BEYOND proprietary grade to maximize tool life and operational throughput:
| BEYOND Grade | Coating Technology | Material Application Intent | Global Equivalent Grade |
|---|---|---|---|
| BY1030 | CVD Thick TiCN + Al2O3 Coating | High-Speed Steel Boring & General Turning (P10–P25) | Sandvik GC4325 / Korloy NC3220 |
| BY8020 | PVD Multi-Layer Nano-AlTiN | Stainless Steels & High-Temp Alloys (M15–M30 / S15–S25) | Sandvik GC1115 / Kennametal KC5010 |
| BYH01 | Uncoated High-Polished Surface | Aluminum Alloys, Copper, and Plastics (N05–N20) | Korloy H01 / Mitsubishi HTi10 |
7. Why Choose BEYOND Cutting Systems
At BEYOND, we build industrial-grade tool holders designed to withstand continuous shop floor conditions. Every boring bar undergoes rigorous 5-axis machining to ensure pocket seats meet exact ISO tolerance standards. This precision guarantees strict centerline height consistency, reducing runout and speeding up insert indexing.
"The 95-degree approach on this 20mm bar provides exactly the clearance we need for profiling custom hubs. We pair it with polished WCGT inserts for aluminum and the finish is excellent. Zero chatter up to 3xD depth."
"Sehr gute Qualität. The insert pocket is machined perfectly. Thread life on the clamping screw holds up to continuous indexing during automated production runs."
"Great chip evacuation channel. Even when boring blind holes in 304 stainless, the chips don't pack up around the shank. Very stable performance."
"Dimensional accuracy is excellent. Center height aligns perfectly out of the box. Outstanding cost performance for our CNC shop."
"The black oxide treatment is high quality and stands up well to high-pressure coolant. Hardened steel core performs exactly as promised."
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.