Buy KGMR2020K-4T20 External Grooving Toolholder - High-Quality CNC Tool
Price shown is a starting point. Contact us for a precise quote based on your requirements.
Description:
Introducing the KGMR2020K-4T20 Grooving Turning Tool Holder, a premium solution for precision machining. With a compact lathe size of 20x20x125mm, this tool holder is engineered for durability and performance.
The package includes the tool holder, M5*20 screws and a L5 wrench, designed for compatibility with GMM4020-MT inserts.
Product parameters:
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Tool Holder Model: KGMR2020K-4T20
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Tool Holder Material : Carbide Steel, Carbon Steel
- Tool Holder Size : About 20 * 20 * 125 mm
- Cutting width: 4mm
- Dmax : 40mm
- Applicable blade : GMM4020-MT
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Screw : M5*20
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Wrench : L5
- Detailed Dimensions of the tool holder : as pictured
Package Contents:
1 * KGMR2020K-4T20 Grooving Turning Tool Holder
1 * "L" Type wrench
1 * M5*20 Type Screw
Features:
1.High-Quality Construction,ensures longevity and reliability
2.Unparalleled performance and tight tolerances
3.High grip, strong impact resistance, obvious speed advantage
4.Designed for precise grooving, ideal for complex machining tasks
5.The user can easily clamp and replace the blade and gasket with just a wrench
BEYOND KGMR2020K-4T20 External Grooving Turning Tools KGMR2020K-4T20 KGMR2020 KGMR2020 K-4T20 CNC Lathe Cutter Holder Machine Metal Tool
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Optimize Your CNC Performance with the KGMR2020K-4T20 Toolholder
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Compact and Efficient Design for External Grooving
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Complete Package: Includes Screws and Wrench for Convenience
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Compatible with GMM4020-MT Inserts for Versatile Machining
5-Point Description
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Precision Grooving Capability: The KGMR2020K-4T20 features a cutting width of 4mm, specifically designed for external grooving, allowing for precise cuts and enhanced surface finish.
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Optimized Dimensions: With a compact size of 20mm x 20mm x 125mm, this toolholder ensures stability and control during operation, making it suitable for a wide range of lathe applications.
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Convenient Setup: The product includes M5*20 screws and an L5 wrench, allowing for quick and easy installation so you can start working on your projects without delay.
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Versatile Insert Compatibility: This toolholder works seamlessly with GMM4020-MT inserts, providing flexibility in your machining tasks and ensuring you have the right tools for different materials.
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High-Quality Construction: As a brand new CNC lathe cutter holder, the KGMR2020K-4T20 is built to last, ensuring reliability and performance in demanding machining environments.


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.