SRGCL2020K06 External Turning Tool Holder for RCMT Inserts – BEYOND
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SRGCL2020K06 External Turning Toolholder
Precision 20x20mm Left-Hand Shank for RCMT0602 Round Inserts
Product Overview
"Which left-hand toolholder offers the highest stability for intricate profiling and multi-directional contouring on a 20mm CNC turret?"
The Beyond SRGCL2020K06 is an industrial-grade external turning toolholder designed specifically for RCMT0602 round inserts. Round geometry provides the strongest possible cutting edge; with no sharp corners to weaken, the insert resists chipping even under heavy interrupted cuts. This holder is the professional choice for profiling, filleting, and roughing in steel and stainless steel, where its 20x20mm shank offers the perfect balance of rigidity and versatility for medium-sized CNC lathes.
Key Features
- ✔ High-Rigidity 42CrMo Steel: Quenched and tempered for maximum tensile strength to suppress vibration.
- ✔ Screw-Down Clamping: Low-profile design ensures unobstructed chip evacuation during deep profiling cycles.
- ✔ ISO Standard Compliance: Precision-engineered pocket ensures zero movement of RCMT/RCGT 06 inserts.
Technical Specifications
Screw Clamp
Round Shape
90° Approach
7° Relief
Left Hand
20x20mm
125mm Len
RCMT06
| ISO Parameter | Metric (mm) | Imperial (inch) |
|---|---|---|
| Shank Size (H x W) | 20 x 20 mm | 0.787" x 0.787" |
| Total Length | 125 mm | 4.921" |
| Compatible Insert | RCMT 0602** | Round 1/4" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Steel (P) | 160 - 280 m/min | 0.12 - 0.40 mm/rev |
| Stainless (M) | 110 - 190 m/min | 0.08 - 0.30 mm/rev |
Required Insert: RCMT 0602** / RCGT 0602**
Specifically designed for 6mm round inserts for superior finishing accuracy.
Shop Compatible Inserts →Common Applications
- Roughing & Finishing of Shafts
- Turbine Blade Contouring
- Complex Profile Turning
- Radius & Fillet Machining
Machine Compatibility
Optimized for CNC lathes with 20mm (3/4") tool turrets. Standard ISO sizing allows for seamless tool changes and compatibility with RCMT 06 series inserts across all major tool brands.
Beyond Brand Material Comparison
Why Beyond? Unlike generic carbon steel toolholders, Beyond uses premium 42CrMo alloy steel, quenched and tempered to HRC 42-45. This results in 30% higher fatigue resistance and significantly better damping capacity, meaning less tool chatter and longer life for your expensive carbide inserts.
Customer Field Reviews
"Great stability on my CNC. Profiling stainless used to be a nightmare, but this left-hand holder is super rigid."
— Robert D., USA"Sehr gute Qualität. Die Passform für die RCMT0602 Platten ist perfekt."
— Hans K., Germany"Qualità eccellente. Molto stabile durante la sgrossatura dei profili."
— Marco V., Italy"Excellent toolholder for high-precision finishing. Fast shipping to Tokyo."
— Kenji S., JapanFrequently Asked Questions
Can I use RCGT inserts for aluminum with this holder?
Yes! The SRGCL2020K06 is fully compatible with both RCMT (standard) and RCGT (ground/polished for non-ferrous) 06mm round inserts.
What is the benefit of a round insert over a diamond shape?
Round inserts have the strongest geometry, preventing edge chipping and providing superior surface finish during profiling by distributing heat more evenly.
Is this toolholder Right-Hand or Left-Hand?
The "L" in SRGCL stands for Left-Hand. Please verify your machine's turret rotation before purchase.
Material Pro Tip: High-Feed Profiling
When using the SRGCL2020K06, the actual chip thickness is less than the feed per revolution due to the round geometry. For radius finishing, you can often increase your feed rate by up to 20% compared to diamond tools, reducing cycle time without sacrificing finish.
Technical FAQ & Buying Guide
Absolutely. Our CNC carbide inserts (including CNMG, WNMG, DNMG, and APMT series) are manufactured strictly adhering to international ISO/ANSI specifications. A CNMG 120408 from OYYU BEYOND will flawlessly fit any standard turning tool holder or indexable tool from major global brands like Sandvik Coromant, Kennametal, Iscar, Walter, or SECO, providing a highly cost-effective premium alternative without sacrificing tolerance or tool life.
We offer optimized CVD and PVD multi-layer coatings for different ISO material groups:
- For Carbon/Alloy Steel (ISO P): Choose our thick multi-layer CVD coated grades (e.g., Al2O3 + TiN). They provide exceptional crater wear resistance and thermal barriers during high-speed dry or wet roughing.
- For Stainless Steel (ISO M): Choose our nano-structured PVD coated grades with sharp, positive chipbreakers (like -TM or -MA). This combination prevents work hardening and effectively controls sticky chips.
The optimal cutting parameters vary depending on the workpiece hardness and operation type:
- For General Steel Turnings: Recommended cutting speed ($V_c$) ranges from 150 to 280 m/min, with a feed rate ($f$) of 0.15 to 0.45 mm/rev.
- For Stainless Steel Finishing: Recommended cutting speed ($V_c$) is 120 to 200 m/min, with a feed rate ($f$) of 0.10 to 0.25 mm/rev.Always adjust parameters based on early wear patterns: increase $V_c$ if built-up edge occurs, or reduce $V_c$ if severe flank wear is observed.
Yes, we support machine shops, distributors, and global buyers with tiered wholesale pricing and competitive volume discounts. We also provide OEM custom manufacturing solutions for tool holders and carbide inserts based on your technical drawings. Contact our team to request a quick B2B quotation.
We provide secure worldwide express shipping (via DHL, FedEx, and UPS) with specialized, vibration-proof industrial packaging to ensure tools arrive in perfect condition. In-stock items are dispatched within 24-48 hours, while custom or bulk orders typically have a stable lead time of 15-25 days.
All our cutting tools and tool holders are manufactured strictly in accordance with ISO 9001 and international industrial standards. Every batch undergoes 100% rigorous quality control testing using high-precision optical measuring equipment to ensure reliable tool life and stable performance in continuous mass production.