CKJNR/L External Profiling Tool Holder for KNUX 1604 Inserts (2020/2525/3232)
Price shown is a starting point. Contact us for a precise quote based on your requirements.
The Original Korloy CKJNR/L Series is a premium External Profiling Tool Holder designed specifically for the iconic KNUX 1604 parallelogram inserts. This series is the industry standard for Copy Turning and Profiling, offering the structural rigidity required to handle the complex lateral forces generated during multi-directional turning. Whether you are performing heavy roughing on forgings or precision profiling on alloy steel, the CKJNR/L provides a rock-solid foundation for your machining process.
Rigid Clamping System: Utilizing a top-clamp mechanism, the CKJNR/L ensures that the KNUX insert is seated perfectly against the pocket walls, eliminating vibration and extending tool life during heavy back-turning operations.
Available Specifications:
| Model (Right/Left) | Shank Size (mm) | Insert Type | Total Length |
|---|---|---|---|
| CKJNR/L 2020K16 | 20 x 20 | KNUX 1604.. | 125 mm |
| CKJNR/L 2525M16 | 25 x 25 | KNUX 1604.. | 150 mm |
| CKJNR/L 3232P16 | 32 x 32 | KNUX 1604.. | 170 mm |
Core Performance Benefits:
- Optimized for Profiling: Specifically designed to accommodate the unique 55° geometry of KNUX inserts for back-turning and contouring.
- High-Grade Alloy Steel: The holder body is treated for high hardness and wear resistance, preventing pocket deformation under heavy loads.
- Precision Seating: Manufactured with tight tolerances to ensure the center height remains consistent after insert changes.
- Excellent Chip Clearance: The head design allows for smooth chip flow, reducing the risk of chip-rewelding on the workpiece.
Recommended Cutting Parameters (Reference with KNUX NC3030):
*Parameters vary based on the specific insert grade used.
| Workpiece Material | Cutting Speed (Vc) | Feed Rate (fn) |
|---|---|---|
| Carbon/Alloy Steel | 150 - 260 m/min | 0.15 - 0.45 mm/rev |
| Stainless Steel | 100 - 180 m/min | 0.12 - 0.35 mm/rev |
| Interrupted Steel | 90 - 160 m/min | 0.15 - 0.30 mm/rev |
Required Inserts:
This holder must be paired with KNUX style inserts. Choose the hand of the insert (R/L) to match your holder hand:
- Compatible Inserts: KNUX 160405R / KNUX 160405L / KNUX 160410R
Quick Tip: Choosing Between Right (R) and Left (L) Hand
In profiling, the hand of the holder is critical for both the machine setup and the insert choice:
The standard choice for most CNC lathes moving toward the chuck. Must use KNUX...R (Right Hand) inserts.
Used for back-turning or sub-spindle operations. Must use KNUX...L (Left Hand) inserts.
Machinist's Pro Tip: Never mix Right-hand holders with Left-hand inserts. The unique parallelogram shape of the KNUX means the rake angle and clearance will be completely incorrect, leading to immediate tool failure and potential damage to the holder pocket.
Package Includes: 1 Tool Holder, 1 Shim, 1 Clamp, and Wrench Set. (Inserts sold separately).
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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.