SRACL2020K10 External Turning Tool Holder for RCMT Inserts – BEYOND
Price shown is a starting point. Contact us for a precise quote based on your requirements.
SRACL2020K10 External Turning Toolholder
Precision 20x20mm Left-Hand Shank for RCMT1003 Round Inserts
Product Overview
"Which left-hand 20mm toolholder provides the most stable performance for intricate radius profiling and contouring using 10mm round inserts?"
The Beyond SRACL2020K10 is a high-rigidity external toolholder engineered for RCMT1003 round inserts. In the world of CNC turning, round inserts (R-type) are prized for their unparalleled edge strength and ability to distribute thermal loads evenly. This 20x20mm shank model is specifically optimized for left-hand machining operations where space and precision are critical. Whether you are roughing complex profiles or finishing smooth fillets in steel or stainless alloys, the SRACL2020K10 delivers the structural integrity required to eliminate chatter and ensure dimensional accuracy.
Key Features
- ✔ High-Grade 42CrMo Alloy Steel: Quenched and tempered to HRC 42-45 for superior impact resistance and long-term durability.
- ✔ Screw-Down Clamping Precision: The S-type clamp design ensures the 10mm insert remains perfectly centered during high-feed profiling.
- ✔ Industrial Grade Coating: Black oxide surface finish prevents chip welding and resists corrosion in high-heat environments.
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 | 4.92" |
| Insert Size | RCMT 1003** | Round 3/8" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Steel (P) | 150 - 250 m/min | 0.15 - 0.45 mm/rev |
| Stainless (M) | 120 - 180 m/min | 0.12 - 0.35 mm/rev |
Required Insert: RCMT 1003** / RCGT 1003**
Specifically designed for 10mm round inserts for medium-duty profiling.
View Compatible Inserts →Primary Applications
- High-Rigidity Radius Profiling
- Complex Contouring on CNC Lathes
- External Facing with Round Corner Finish
- Medium Roughing to Finishing in Carbon Steel
Compatibility
Designed for industrial CNC lathes and tool blocks with 20mm (3/4") square shank capacity. ISO standard geometry ensures compatibility with RCMT 10 series inserts from all major manufacturers.
Beyond Brand Material Comparison
Professional Alloy Choice: While generic toolholders often use standard carbon steel, Beyond utilizes high-alloy 42CrMo steel. Our specialized multi-stage quenching process provides 30% higher harmonic damping capacity. This is critical for the 10mm round insert, as it prevents micro-vibrations from chipping the carbide edge, resulting in superior surface finishes and 25% longer tool life.
Verified B2B Customer Success
"Massive rigidity for a 20mm shank. We use this for profiling small shafts and it's rock solid. The 10mm round insert lasts forever."
— Robert D., USA"Qualität ist erstklassig. Die RCMT10 Platten sitzen fest und sicher. Beste Wahl für mittlere Zerspanung."
— Dieter W., Germany"Excellent toolholder for roughing radius contours. The surface finish is impressive even on tough alloys."
— Marco V., Italy"Consistent performance. Accuracy is equal to top-tier brands but at a much better value for our machine shop."
— Kenji S., JapanFrequently Asked Questions
Is this compatible with RCGT inserts?
Yes! The SRACL2020K10 is fully compatible with both RCMT (standard) and RCGT (ground/polished for non-ferrous) 10mm round inserts.
What is the benefit of a Left-Hand (L) holder?
Left-hand holders are utilized for specific CNC turret configurations or when machining from the tailstock toward the spindle is required by the part geometry.
Does it include the screw and wrench?
Yes, every Beyond toolholder comes with a high-tensile clamping screw and the corresponding Torx wrench.
Material Pro Tip: Round Edge Advantage
When profiling with the SRACL2020K10, the 10mm round insert allows for higher feed rates because the edge strength is distributed around the radius. This avoids the "weak tip" problem of diamond inserts, allowing you to maximize MRR (Metal Removal Rate).
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.