Korloy VBGT160404-AK H01 (ANSI VBGT 331-AK) Polished Aluminum Insert (10pcs)
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The Original Korloy VBGT160404-AK H01 (ANSI Cross Reference: VBGT 331-AK) is a heavy-duty Polished Uncoated Carbide Insert designed for Superior Surface Finishing on large and medium-sized non-ferrous components. The 1604 (ANSI 33) footprint is 50% thicker than the 11-size, providing the stability needed for higher material removal rates. Combined with the AK (Aluminum Knight) chipbreaker and the H01 Grade, this insert offers an unmatched combination of edge sharpness and thermal stability for Aluminum, Copper, and Brass.
High-Efficiency Finishing: The 0.4mm (0.016") corner radius is specifically designed to handle increased feed rates while maintaining a high-gloss finish. The mirror-polished rake face prevents "Built-Up Edge" (BUE) — the leading cause of surface defects in aluminum alloys like 6061 or 7075.
Technical Specifications (Metric & ANSI):
| ISO Designation | VBGT 160404-AK |
| ANSI Designation | VBGT 331-AK |
| Inscribed Circle (IC) | 9.525 mm / (3/8") |
| Thickness (S) | 4.76 mm / (3/16") |
| Corner Radius (r) | 0.4 mm / (0.016") |
| Relief Angle | 5° (B-Type) |
| Grade | H01 (Micro-Polished Uncoated Carbide) |
Core Performance Benefits:
- Enhanced Edge Security: The 0.4mm radius offers a more robust cutting edge compared to the 0.2mm version, significantly reducing the risk of micro-chipping.
- Consistent Mirror Finish: H01 polished surface provides ultra-low friction, ensuring chips flow away smoothly without sticking to the rake face.
- Increased Productivity: Stable 16-size body allows for higher feed rates and depths of cut in semi-finishing operations.
- 35° Versatility: Ideal for complex profiling, undercuts, and detail work on medium-to-large CNC lathes.
Recommended Cutting Parameters:
| Material Group | Cutting Speed (Vc) | Feed Rate (fn) | Depth of Cut (ap) |
|---|---|---|---|
| Aluminum Alloys (Wrought) | 300-1100 m/min | 0.08-0.25 mm/rev | 0.1-3.5 mm |
| Copper / Brass | 200-650 m/min | 0.05-0.20 mm/rev | 0.1-2.5 mm |
| Plastics (Delrin/PEEK) | 150-500 m/min | 0.10-0.30 mm/rev | 0.2-4.5 mm |
Compatible Tooling Systems (5° Relief):
Precision-matched for VBGT 1604 (ANSI 33) positive tool holders:
- External Profile Tool: SVJBR 2020K16 / SVJBR 2525M16
- Precision Boring Bars: S25S-SVUBR16 / S32T-SVUBR16
Machinist Tip: Optimization Guide
How to maximize your VBGT 331 results:
Because of the R0.4 radius, you can push the feed rate (fn) higher. This not only increases production but also helps the AK chipbreaker "snap" the chips more effectively in softer alloys.
When machining high-silicon aluminum or copper, high-pressure flood coolant is highly recommended. It keeps the H01 edge cool and washes away abrasive chips that can scratch your mirror finish.
Pro Advice: For large external profiling, ensure your SVJBR tool holder is in good condition. Any vibration will show up instantly on a mirror-polished aluminum surface.
Packaging: 10 pieces per box.
VBGT 331-AK Korloy H01, VBGT 160404 aluminum turning, mirror finish inserts for 6061 aluminum, high feed aluminum profiling inserts, SVJBR 2525 tool holder inserts, polished carbide for brass machining