BEYOND SRACR2020K10-M4 External Turning Tool Holder, RCMT1003 Insert
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SRACR2020K10 External Turning Toolholder
Precision 20x20mm Right-Hand Shank for RCMT1003 Round Inserts
Product Overview
"Which right-hand 20mm toolholder is recommended for high-stability profiling and complex radius contouring using 10mm round inserts?"
The Beyond SRACR2020K10 is a professional-grade external turning toolholder specifically engineered for RCMT1003 round inserts. Designed for CNC applications requiring high precision and superior edge strength, the 20x20mm shank offers an ideal balance of maneuverability and rigidity. Round inserts (R-type) are inherently the most robust edge geometry, dissipating mechanical stress and heat over a larger radius. This tool is the premier solution for roughing and finishing complex profiles in steel, stainless steel, and heat-resistant alloys.
Key Features
- ✔ Premium 42CrMo Alloy Steel: Quenched and tempered to HRC 42-45 for superior impact resistance and harmonic damping.
- ✔ Precision Screw Clamping: The S-type locking mechanism ensures zero-shift insert repeatability during heavy-duty profiling.
- ✔ Anti-Corrosion Finish: Black oxide coating provides maximum protection against chip welding and industrial wear.
Technical Specifications
Screw Clamp
Round Shape
90° Approach
7° Relief
Right 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) |
|---|---|---|
| Carbon Steel (P) | 180 - 280 m/min | 0.15 - 0.45 mm/rev |
| Stainless Steel (M) | 130 - 190 m/min | 0.12 - 0.35 mm/rev |
Required Insert: RCMT 1003** / RCGT 1003**
Optimized for 10mm round inserts for high-volume metal removal.
View Compatible Inserts →Common Applications
- Shaft & Axle Profiling
- Heavy Radius Contouring
- External Facing in Tough Alloys
- High-Feed Roughing Operations
Compatibility
Designed for industrial CNC lathes and conventional tool posts with 20mm (3/4") tool blocks. Standard ISO geometry ensures compatibility with RCMT 10 series inserts from all global manufacturers.
Beyond Brand Material Comparison
Industrial Rigidity: While many standard holders use low-carbon structural steel, Beyond utilizes high-alloy 42CrMo. 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 20% longer tool life.
Verified Customer Success
"Massive rigidity. We use this for profiling heavy shafts and it's rock solid. The 10mm round insert stays perfectly positioned."
— 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 large fillets. The surface finish is impressive even on tough alloys."
— Marco V., Italy"Beyond toolholders are consistently reliable. Accuracy is equal to top-tier brands but at a much better value."
— Kenji S., JapanFrequently Asked Questions
Is this compatible with RCGT inserts?
Yes! The SRACR2020K10 is fully compatible with both RCMT (standard) and RCGT (ground/polished for aluminum) 10mm round inserts.
What is the "K" in the model name?
The "K" denotes the ISO standard total length of the toolholder, which is 125mm (approx. 4.92 inches).
Are the clamping screw and wrench included?
Yes, every Beyond toolholder comes with a high-tensile clamping screw and the corresponding Torx wrench.
Material Pro Tip: Radius Edge Advantage
When roughing with the SRACR2020K10, the 10mm round insert allows for significantly higher feed rates compared to diamond inserts. Because the edge is stronger, you can push the tool harder without fear of tip breakage, maximizing your cycle time efficiency.
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.