BEYOND SRACL2020K08 CNC External Turning Tool Holder - 20x20mm Left Hand
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BEYOND SRACL2020K08 External Turning Tool Holder
Left-Hand Precision Profiling for RCMT 0803 Inserts
Product Overview
"Which left-hand tool holder provides the best edge strength for profiling complex radius contours on a CNC lathe?"
The BEYOND SRACL2020K08 is a high-rigidity Left-Hand tool holder designed for RCMT 0803 round inserts. Round geometry is the industry standard for maximum edge strength, allowing this tool to excel in heavy profiling, radius turning, and interrupted cuts. Built from premium alloy steel and vacuum-hardened, it minimizes vibration and ensures consistent dimensional accuracy for professional CNC machining environments.
Key Features
Multi-Directional Profiling
The R-style (Round) insert seating allows for flexible profiling from multiple angles, reducing the need for multiple tool changes on complex parts.
Hardened 40Cr Alloy Steel
Body hardened to HRC 42-45 to resist deformation under heavy cutting loads and prevent seat wear over time.
S-Type Screw Clamp
Ensures the RCMT08 insert is locked securely with zero lateral movement, optimizing surface finish and extending insert life.
Technical Specifications
| Feature | Metric (ISO) | Imperial (ANSI) |
|---|---|---|
| Shank Size | 20 x 20 mm | 0.78" x 0.78" |
| Total Length | 125 mm | 4.92" |
| Compatible Insert | RCMT 0803MO | RCMT 2.5 |
| Direction | Left Hand | Left Hand |
Recommended Cutting Parameters:
| Material | Speed (Vc) | Feed (fn) |
|---|---|---|
| Steel (P) | 150 - 270 m/min | 0.15 - 0.45 mm/rev |
| Stainless (M) | 120 - 190 m/min | 0.12 - 0.35 mm/rev |
Applications
- Heavy roughing of turbine blades and rounded shafts.
- Profilng operations on Steel, Stainless, and Cast Iron.
- Radius turning for aerospace and hydraulic components.
- Best in class for interrupted cutting conditions.
Compatibility
Designed for left-hand orientation on CNC Turrets and manual lathes with 20mm tool posts. Compatible with BEYOND, Sandvik, and Mitsubishi RCMT 0803 series inserts.
Global Machinist Feedback
"Excellent Profiling stability"
Mark T., USA
Using this for radius profiling on carbon steel shafts. The left-hand 20mm shank is rock solid.
"Top Rigidity"
Hans B., Germany
BEYOND quality matches the big brands at a better price point. Hardened body is key.
"Great Value"
Luca M., Italy
Perfect fit for RCMT08 inserts. Used it for interrupted cuts on stainless and it held up well.
Expert FAQ
Q: Why use a Round (RCMT) insert instead of a rhombic one?
A: Round inserts provide the strongest cutting edge and allow for variable approach angles, making them significantly better for profiling and heavy roughing where edge chipping is a risk.
Q: Is this tool holder suitable for stainless steel?
A: Yes. When paired with a PVD-coated RCMT insert (like BEYOND BY8020 grade), it offers excellent heat resistance and chip control in stainless steel applications.
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.