SRACL2020K10 External Turning Tool Holder for RCMT Inserts – BEYOND
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SRACL2020K10 External Turning Toolholder
Precision 20x20mm Left-Hand Shank for RCMT1003 Round Inserts
Product Overview
"Which left-hand 20mm toolholder provides the most stable performance for intricate radius profiling and contouring using 10mm round inserts?"
The Beyond SRACL2020K10 is a high-rigidity external toolholder engineered for RCMT1003 round inserts. In the world of CNC turning, round inserts (R-type) are prized for their unparalleled edge strength and ability to distribute thermal loads evenly. This 20x20mm shank model is specifically optimized for left-hand machining operations where space and precision are critical. Whether you are roughing complex profiles or finishing smooth fillets in steel or stainless alloys, the SRACL2020K10 delivers the structural integrity required to eliminate chatter and ensure dimensional accuracy.
Key Features
- ✔ High-Grade 42CrMo Alloy Steel: Quenched and tempered to HRC 42-45 for superior impact resistance and long-term durability.
- ✔ Screw-Down Clamping Precision: The S-type clamp design ensures the 10mm insert remains perfectly centered during high-feed profiling.
- ✔ Industrial Grade Coating: Black oxide surface finish prevents chip welding and resists corrosion in high-heat environments.
Technical Specifications
Screw Clamp
Round Shape
90° Approach
7° Relief
Left 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) |
|---|---|---|
| Steel (P) | 150 - 250 m/min | 0.15 - 0.45 mm/rev |
| Stainless (M) | 120 - 180 m/min | 0.12 - 0.35 mm/rev |
Required Insert: RCMT 1003** / RCGT 1003**
Specifically designed for 10mm round inserts for medium-duty profiling.
View Compatible Inserts →Primary Applications
- High-Rigidity Radius Profiling
- Complex Contouring on CNC Lathes
- External Facing with Round Corner Finish
- Medium Roughing to Finishing in Carbon Steel
Compatibility
Designed for industrial CNC lathes and tool blocks with 20mm (3/4") square shank capacity. ISO standard geometry ensures compatibility with RCMT 10 series inserts from all major 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 10mm 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 Success
"Massive rigidity for a 20mm shank. We use this for profiling small shafts and it's rock solid. The 10mm round insert lasts forever."
— 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 radius contours. The surface finish is impressive even on tough alloys."
— Marco V., Italy"Consistent performance. Accuracy is equal to top-tier brands but at a much better value for our machine shop."
— Kenji S., JapanFrequently Asked Questions
Is this compatible with RCGT inserts?
Yes! The SRACL2020K10 is fully compatible with both RCMT (standard) and RCGT (ground/polished for non-ferrous) 10mm round inserts.
What is the benefit of a Left-Hand (L) holder?
Left-hand holders are utilized for specific CNC turret configurations or when machining from the tailstock toward the spindle is required by the part geometry.
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: Round Edge Advantage
When profiling with the SRACL2020K10, the 10mm round insert allows for higher feed rates because the edge strength is distributed around the radius. This avoids the "weak tip" problem of diamond inserts, allowing you to maximize MRR (Metal Removal Rate).
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.