SRGCL2020K10 External Turning Tool Holder for RCMT Inserts – BEYOND
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SRGCL2020K10 External Turning Toolholder
Precision 20x20mm Left-Hand Shank for RCMT1003 Round Inserts
Product Overview
"What is the most rigid left-hand toolholder for high-feed profiling and radius turning on a 20mm CNC shank?"
The Beyond SRGCL2020K10 is a high-performance external turning toolholder specifically engineered for RCMT1003 round inserts. This tool utilizes a round geometry that offers the strongest cutting edge in the industry. By effectively distributing heat and cutting forces over a larger surface area compared to diamond inserts, the SRGCL2020K10 excels in roughing forged surfaces and complex contouring in steel, stainless steel, and high-temp alloys where edge reliability is critical.
Key Features
- ✔ Vibration Suppression: Forged from high-tensile 42CrMo alloy steel for chatter-free machining.
- ✔ Precision Clamping: Screw-down design ensures the RCMT10 insert remains stationary under heavy radial loads.
- ✔ Multi-Directional Versatility: No fixed lead angle allows for flexible profiling of complex radii and contours.
Technical Specifications
Screw Clamp
Round Shape
90° Approach
7° Relief
Left Hand
20x20mm
125mm Len
RCMT10
| 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 1003** | Round 3/8" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (P) | 150 - 230 m/min | 0.15 - 0.45 mm/rev |
| Stainless Steel (M) | 110 - 170 m/min | 0.10 - 0.35 mm/rev |
Required Insert: RCMT 1003** / RCGT 1003**
Specifically optimized for 10mm round inserts to provide maximum profiling agility.
Shop Compatible Inserts →Industrial Applications
- Shaft Profiling & Contouring
- Radii Machining for Forged Parts
- External Facing & Radius Finishing
- Heavy Roughing in High-Alloy Steels
Compatibility
Fits all standard CNC Lathe turrets with 20mm tool holders. Standard ISO geometry ensures full compatibility with RCMT/RCGT 10 series inserts from major global manufacturers.
Beyond Material Advantage
Superior Alloy Body: Beyond toolholders are manufactured from 42CrMo alloy steel, quenched and tempered to HRC 42-45. This provides 25% better vibration damping compared to standard carbon steel shanks, resulting in superior surface finishes and longer insert edge life.
Customer Field Reviews
"Great stability for profiling 304 stainless. The 20mm shank fits perfectly in our HAAS turret."
— John M., USA"Halter ist sehr präzise gefertigt. RCMT1003 Platten passen spielfrei. Top Preis-Leistung."
— Dieter W., Germany"Excellent rigidity for radii turning. Much better tool life than using diamond inserts for profiling."
— Marco P., Italy"Precision manufacturing. Fits our Japanese lathe turrets perfectly."
— Kenji S., JapanFrequently Asked Questions
Can I use RCGT inserts for aluminum with this holder?
Yes! The SRGCL2020K10 is fully compatible with both RCMT (standard) and RCGT (ground/polished) 10mm round inserts.
Is this toolholder Left-Hand or Right-Hand?
The "L" in SRGCL indicates a Left-Hand configuration. Ensure this matches your machine turret setup.
Why use a round insert instead of a diamond insert?
Round inserts have the strongest geometry, preventing edge chipping during tough profiling and providing superior surface finish at high feeds.
Material Pro Tip: Round Insert Advantage
When using the SRGCL2020K10, the chip thickness varies with the depth of cut. For light profiling, you can increase your feed rate (mm/rev) significantly while maintaining a low radial force, resulting in exceptional productivity and tool life.
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.