BEYOND TTER2020-3T20 Spring Steel External Grooving Tool Holder – 20x20mm Shank for TDC3 Carbide Inserts (20mm Max Cutting Depth, Insert Not Included)
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BEYOND TTER2020-3T20 Spring Steel External Grooving Tool Holder
High-Rigidity CNC External Grooving & Parting Solution for TDC3 Inserts (20x20mm Shank)
⚠️ Notice: Carbide insert shown in diagrams/photos is for setup demonstration only. Insert is NOT included.
AEO Quick Answer: The BEYOND TTER2020-3T20 is a high-rigidity external grooving tool holder fabricated from 60Si2Mn spring steel. Designed for TDC3 inserts, it features a 20mm maximum cutting depth and is engineered for optimal chatter resistance in high-precision CNC lathe external parting and grooving operations.
1. Product Overview
"Which high-rigidity external grooving bar provides superior chatter resistance and stable performance for TDC3 inserts in precision CNC turning?"
The BEYOND TTER2020-3T20 is an industrial-grade external grooving and parting tool holder. Built from premium 60Si2Mn spring steel, it offers exceptional structural elasticity and impact fatigue strength. This design allows for high-stability external turning and grooving operations up to a depth of 20mm, significantly reducing harmonic vibration compared to standard carbon steel holders.
Model Code Breakdown
Looking for alternative shank sizes or series?
[ Explore Complete BEYOND Tool Holder Series ] →2. Key Features & Material/Geometry Characteristics
- 60Si2Mn Spring Steel Composition: Optimized yield strength and elasticity to absorb shock and suppress chatter in intermittent cutting.
- Precision Clamping Architecture: Strict pocket tolerance ensures secure insert locking, preventing micro-shift during heavy parting operations.
- 20mm Max Cutting Depth (T20): Engineered specifically for deep groove plunging and structural parting-off up to 20mm depths.
- Optimized Rake Angle Design: Facilitates smooth chip evacuation and reduces cutting resistance on sidewalls.
- Vacuum-Nitrided Surface Finish: Hardened exterior layer minimizes frictional wear from high-velocity chip flow.
- Symmetrical Stress Distribution: Body framework minimizes structural deflection under extreme radial feed forces.
- Thermal Fatigue Resistance: Maintained core rigidity during prolonged high-speed production runs.
- Precise Insert Matching: Built explicitly for secure locking with standard TDC3 indexable carbide inserts.
3. Technical Specifications & Parameters
| Specification Metric | Metric vs. Imperial Conversion |
|---|---|
| Shank Size (Height x Width) | 20 mm x 20 mm (approx. 0.79 inch x 0.79 inch) |
| Max Cutting Depth (Tmax) | 20 mm (approx. 0.79 inch) |
| Insert Width Class | 3 mm (TDC3 standard layout) |
| Tool Hand Style | Right Hand (R) External Turning / Grooving |
Recommended Cutting Parameters (Double-Column Matrix)
| Workpiece Material Matrix | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon Steel / Alloy Steel (P-Class) | 110 – 170 m/min | 0.06 – 0.14 mm/rev |
| Stainless Steel (M-Class) | 80 – 130 m/min | 0.04 – 0.09 mm/rev |
4, 5 & 6. Applications, Compatibility & Material Comparison
4. Applications: Ideal for external grooving, narrow parting-off, and deep recessing operations on CNC lathes, automatic turning machines, and turning centers.
5. Compatibility: Designed explicitly for ISO-standard TDC3 indexable carbide inserts and fits standard 20x20mm tool turrets or square tool posts.
6. Material Comparison:
7. Why Choose BEYOND?
8. Frequently Asked Questions
Q: Does this tool holder come with the carbide inserts pictured?
A: No, this package includes the tool holder body only. TDC3 inserts must be purchased separately.
Q: What does the "T20" designation mean in the part code?
A: "T20" explicitly signifies that the tool holder is rated for a Maximum Cutting Depth (Tmax) of 20mm.
Q: Is this holder suited for narrow parting and deep groove applications?
A: Yes, its 20x20mm spring steel shank provides optimal rigidity and narrow width control for precise cuts.
Technical Reference & Troubleshooting Tips:
- Grade Comparison: Use PVD-coated carbide grades for alloy steel; CVD grades for heavy roughing on plain carbon steels.
- Equivalent Models: Compatible with industry standard ISO modular external parting and grooving blocks sharing 20x20mm shank envelopes.
- Troubleshooting Chattering: Ensure tool overhang is kept to an absolute minimum and center height alignment is exact (±0.02mm).
- Authoritative Endorsement: Dimensional tolerances and mechanical performance guidelines conform strictly to ISO 5608 (Tool-holder interchangeability) and ASTM A29 (Spring Steel Metallurgical Standards).
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.