BEYOND SRACL1212H08 CNC External Turning Tool Holder - 12x12mm Left Hand
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BEYOND SRACL1212H08 External Turning Tool Holder
Precision 12mm Left-Hand Tooling for RCMT 0803 Profiling
Product Overview
"Which left-hand CNC tool holder is best for finishing complex profiles with round RCMT inserts on a small lathe?"
The BEYOND SRACL1212H08 is a professional-grade 12x12mm tool holder optimized for RCMT 0803 round inserts. Designed for left-hand external turning, the round geometry provides the highest edge strength available, making it the industry standard for contouring and radius turning. By utilizing round inserts, machinists can rotate the cutting edge multiple times, significantly reducing tooling costs compared to traditional rhombic shapes while maintaining superior surface finishes on stainless steel and alloys.
Key Features
High-Rigidity Alloy Steel
Forged from 40Cr steel and vacuum-quenched (HRC 42-45) to ensure maximum vibration dampening and tool life.
Multi-Edge Advantage
Round inserts provide an "infinite" number of indexed edges, allowing you to use every millimeter of the carbide circumference.
Precision S-Type Lock
The screw-down clamping system offers the most stable seat for profiling, preventing micro-vibrations during interrupted cuts.
Technical Specifications
| Parameter | Metric (ISO) | Imperial (ANSI) |
|---|---|---|
| Model Number | SRACL1212H08 | SRACL 08-3 |
| Shank Size | 12 x 12 mm | 0.47" x 0.47" |
| Overall Length | 100 mm | 3.94" |
| Compatible Insert | RCMT 0803 | RCMT 2.5 |
Cutting Recommendations:
| Material Group | Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel (P) | 150 - 280 m/min | 0.15 - 0.50 mm/rev |
| Stainless Steel (M) | 110 - 180 m/min | 0.12 - 0.40 mm/rev |
Applications
- Heavy roughing of turbine blades and rounded shafts.
- Semi-finishing with high stability requirements.
- Complex contour profiling in aerospace and automotive.
- Optimized for Steel, Stainless, and Heat-Resistant Alloys.
Compatibility
Fits 12mm CNC Turrets and Manual Lathe Quick Change Tool Posts (QCTP). Compatible with RCMT 0803 inserts from BEYOND, Sandvik, and Kennametal.
Verified Customer Feedback
"Perfect for Radius Turning"
James W., USA
Great tool for profiling. The 12mm shank is very sturdy for smaller lathe work.
"Qualität aus China"
Klaus M., Germany
BEYOND holders are always precise. The finish on the RCMT seat is perfect.
"Ottimo rapporto qualità-prezzo"
Luca F., Italy
Excellent price/quality ratio. Fast shipping to Europe. Holds inserts tight.
Machinist's Quick Help (FAQ)
Q: Why use a Round insert instead of a Diamond (CNMG/DNMG)?
A: Round inserts provide superior edge strength and better surface finishes for radius work. They are also more economical as the entire circumference can be used.
Q: Is this tool holder suitable for high-speed CNC applications?
A: Yes. The 40Cr alloy steel and precision S-type clamping are designed to handle high RPMs and rapid feed rates without vibration.
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.