SRGCR2020K12 External Turning Tool Holder for RCMT Inserts – BEYOND
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💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
SRGCR2020K12 External Turning Toolholder
Professional 20x20mm Right-Hand Shank for RCMT1204 Round Inserts
Product Overview
"Which toolholder provides the best stability for high-feed profiling and radius turning on a 20mm CNC turret?"
The Beyond SRGCR2020K12 is a precision-engineered external turning toolholder designed for high-performance profiling using RCMT1204 round inserts. The "Round" geometry offers the strongest cutting edge in the industry, effectively distributing heat and cutting forces over a larger surface area compared to diamond inserts. This makes the SRGCR2020K12 ideal for heavy-duty roughing and intricate contouring in steel, stainless steel, and high-temp alloys where edge chipping must be eliminated.
Key Features
- ✔ Superior Edge Strength: Round RCMT geometry resists notched wear and prevents breakage during interrupted cuts.
- ✔ Vibration Damping Body: Forged from high-tensile alloy steel to ensure smooth finishes even at higher feed rates.
- ✔ Multi-Directional Profiling: No fixed lead angle allows for flexible profiling of complex radii and contours.
Technical Specifications
Screw Clamp
Round Shape
90° Approach
7° Relief
Right Hand
20x20mm
125mm Len
RCMT12
| 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 1204** | Round 1/2" |
Recommended Cutting Parameters
| Workpiece Material | Speed (Vc) | Feed (f) |
|---|---|---|
| Carbon Steel (P) | 150 - 240 m/min | 0.15 - 0.50 mm/r |
| Stainless Steel (M) | 110 - 180 m/min | 0.10 - 0.40 mm/r |
Required Insert: RCMT 1204** / RCGT 1204**
Optimized for round carbide inserts to handle heavy profiling work.
Shop RCMT1204 Inserts →Typical Applications
- Roughing of Forged Steel Parts
- Complex Profiling & Large Radius Contours
- Turbine Blade & Aero-Component Machining
- External Facing in Interrupted Cuts
Equipment Compatibility
Designed for CNC Lathes and manual lathes with 20mm tool posts. Fully compatible with ISO standard RCMT/RCGT 12 series inserts from brands like Sandvik, Iscar, and Beyond.
Beyond Brand Material Comparison
High-Tensile Alloy Body: Our SRGCR holders are manufactured from 42CrMo alloy steel, providing 25% better vibration damping than standard carbon steel shanks. This ensures a cleaner surface finish and significantly longer insert life during high-speed operations.
Customer Field Reviews
"The SRGCR2020 toolholder is incredibly rigid. We use it for profiling 4140 steel and the RCMT inserts stay secure even during roughing."
— Robert D., USA"Perfekt für schwere Schruppbearbeitung. Die Qualität von Beyond ist wie immer erstklassig."
— Hans K., Germany"Ottima rigidità. Used it for profiling stainless manifolds, zero vibration issues."
— Marco V., Italy"Quality finish, fits my turret perfectly. Best value for professional shops."
— Hiroshi S., JapanFrequently Asked Questions
Can I use RCGT inserts for aluminum with this holder?
Yes! The SRGCR2020K12 is fully compatible with both RCMT (molded) and RCGT (ground/polished) 12mm round inserts.
Is this toolholder Right-Hand or Left-Hand?
The "R" in SRGCR indicates a Right-Hand toolholder. Please check your machine turret orientation before purchasing.
Why use a round insert instead of a diamond insert?
Round inserts have a much stronger cutting edge and can handle profiling in multiple directions with lower vibration, which is essential for large radii.
Material Pro Tip: Round Insert Advantage
When using the SRGCR2020K12, the chip thickness changes based on the depth of cut. For shallow profiling, you can increase your feed rate significantly. However, for heavy roughing, ensure your depth of cut doesn't exceed 50% of the insert diameter (6mm) to maintain maximum stability.
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.