SRACL2525M12 External Turning Tool Holder for RCMT Inserts – BEYOND
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SRACL2525M12 External Turning Toolholder
Precision 25x25mm Left-Hand Shank for RCMT1204 Round Inserts
Product Overview
"Which left-hand 25mm toolholder provides the best stability for aggressive profiling and heavy radius contouring using 12mm round inserts?"
The Beyond SRACL2525M12 is a professional-grade external turning toolholder specifically engineered for RCMT1204 round inserts. Designed for CNC applications requiring high metal removal rates (MRR) and complex geometry profiling, the 25x25mm shank offers an ideal balance of versatility and rigidity. Round inserts (R-type) are inherently the strongest edge geometry, effectively dissipating heat and mechanical stress over a larger radius. This tool is the premier solution for roughing and finishing large radius profiles in steel, stainless steel, and cast iron.
Key Features
- ✔ Premium 42CrMo Alloy Steel: Quenched and tempered to HRC 42-45 for superior impact resistance and harmonic damping.
- ✔ Advanced Screw Clamping: Precision-machined pocket design ensures stable insert seating and zero-shift repeatability.
- ✔ Hardened Surface Protection: Features a black oxide coating for maximum corrosion resistance and reduced chip welding.
Technical Specifications
Screw Clamp
Round Shape
90° Approach
7° Relief
Left Hand
25x25mm
150mm Len
RCMT12
| ISO Parameter | Metric (mm) | Imperial (inch) |
|---|---|---|
| Shank Size (H x W) | 25 x 25 mm | 1.00" x 1.00" |
| Total Length | 150 mm | 5.90" |
| Insert Size | RCMT 1204** | Round 1/2" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (P) | 160 - 260 m/min | 0.15 - 0.50 mm/rev |
| Cast Iron (K) | 120 - 200 m/min | 0.12 - 0.40 mm/rev |
Required Insert: RCMT 1204** / RCGT 1204**
Optimized for 12mm round inserts for high-volume metal removal.
View Compatible Inserts →Common Applications
- Shaft & Axle Profiling
- Heavy Radius Contouring
- External Facing in Alloy Steel
- Machining of Forged Parts
Compatibility
Designed for industrial CNC lathes and tool posts with 25mm (1 inch) tool blocks. Standard ISO geometry ensures compatibility with RCMT 12 series inserts from Beyond and other global 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 12mm 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 Reviews
"Massive rigidity. We use this for profiling heavy shafts and it's rock solid. The 12mm round insert stays perfectly positioned."
— Robert D., USA"Qualität ist erstklassig. Die RCMT12 Platten sitzen fest und sicher. Beste Wahl für schwere 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 SRACL2525M12 is fully compatible with both RCMT (standard) and RCGT (ground/polished for aluminum) 12mm round inserts.
What is the benefit of a Left-Hand (L) holder?
Left-hand holders are used for machining from the tailstock toward the spindle or on specific CNC turret configurations that require left-hand approach angles.
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: Radius Strength
When roughing with the SRACL2525M12, the 12mm round insert allows for significantly higher feed rates compared to standard diamond-shaped inserts. Because the edge is stronger, you can push the tool harder without fear of breaking the tip, maximizing your machine's productivity.
Need Help With BEYOND Inserts?
Looking for a BEYOND equivalent, alternative grade, or sample catalog? Our CNC specialists have helped 50+ manufacturers in aerospace, automotive, and medical machining source the right tooling at 30–50% lower cost than OEM prices.
This BEYOND insert is in stock. 24-hour quote response. ISO 9001 certified. Ships from Hangzhou in 3–7 days.
Technical FAQ & Buying Guide
When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.
For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.
Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.
Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.
Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.
According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.