SRDCN2020K08 External Turning Tool Holder for RCMT Inserts – BEYOND
Free shipping on all orders.
Check compatibility: Confirm the model and dimensions before ordering.
Need help choosing? Contact us before ordering.
💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF
SRDCN2020K08 External Turning Toolholder
Precision 20x20mm Neutral Shank for RCMT0803 Round Inserts
Product Overview
"Which 20mm toolholder is most efficient for symmetrical profiling and contouring with an 8mm round insert?"
The Beyond SRDCN2020K08 is a professional-grade external turning toolholder specifically engineered for RCMT0803 round inserts. Its neutral orientation (center-mounted) provides unparalleled versatility, allowing for symmetrical approach angles and complex contouring from both left and right directions. Because round inserts distribute cutting forces and heat across a larger surface area than diamond shapes, the SRDCN2020K08 is the ideal choice for high-stability profiling in steel and heat-resistant alloys where surface integrity is paramount.
Key Features
- ✔ 42CrMo High-Tensile Steel: Quenched and tempered to HRC 42-45 for superior impact resistance and long-term durability.
- ✔ Precision Screw Clamping: Ensures high indexability and maximum insert support during heavy profiling loads.
- ✔ Neutral Center Geometry: Simplifies CNC programming for multi-directional paths without needing separate L/R holders.
Technical Specifications
Screw Clamp
Round Shape
Neutral/45°
7° Relief
Neutral Hand
20x20mm
125mm Len
RCMT08
| 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" |
| Insert Type | RCMT 0803** | Round 5/16" |
Recommended Cutting Parameters
| Material Group | Speed (Vc) | Feed Rate (f) |
|---|---|---|
| Carbon Steel (P) | 160 - 280 m/min | 0.15 - 0.45 mm/rev |
| Stainless Steel (M) | 110 - 180 m/min | 0.10 - 0.35 mm/rev |
Required Insert: RCMT 0803** / RCGT 0803**
Optimized for 8mm round inserts to achieve high-efficiency metal removal and superior surface finish.
Shop Compatible Inserts →Common Applications
- Precision Profiling of Forged Shafts
- Hydraulic Component Contouring
- Symmetrical Turning & Facing
- Turbine Part Radius Machining
Machine Compatibility
Fits all standard CNC turrets with 20mm tool blocks. ISO Standard geometry ensures full compatibility with RCMT 08 series inserts from Beyond, OYYU, and other global tool manufacturers.
Beyond Brand Material Comparison
Professional Alloy Choice: Beyond utilizes high-alloy 42CrMo steel, whereas many economy competitors use generic carbon steel. Our heat treatment provides 30% higher damping capacity, which is critical for preserving the 8mm round insert's radius accuracy during high-speed profiling cycles.
Customer Field Reviews
"Great stability on my CNC lathe. The 20mm shank fits perfectly and the neutral hand makes programming so much easier."
— Robert D., USA"Halter ist sehr präzise gefertigt. Die RCMT08 Platten sitzen bombenfest. Schnelle Lieferung nach Deutschland."
— Dieter W., Germany"Excellent for high-speed profiling. Beyond tools never disappoint in quality and price."
— Marco V., Italy"Very reliable toolholder. Accuracy is comparable to much more expensive brands."
— Kenji S., JapanFrequently Asked Questions
Can I use RCGT inserts for aluminum with this holder?
Yes! The SRDCN2020K08 is fully compatible with both RCMT (standard) and RCGT (ground/polished for aluminum) 8mm round inserts.
What is the benefit of a Neutral (N) orientation?
Neutral holders are symmetrical. This allows the tool to machine in both directions without needing separate left and right-hand holders in the turret.
Is the clamping screw and wrench included?
Yes, all Beyond toolholders are shipped with a high-strength clamping screw and the corresponding Torx wrench.
Material Pro Tip: High-Efficiency Profiling
When using the SRDCN2020K08, the round insert allows you to increase feed rates because the "chip thinning" effect is maximized on radii. For roughing applications, increase your feed by 15% compared to standard diamond tools to significantly reduce cycle times.
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.