Tungaloy PNMU0905GNEN-MJ AH120 Insert
DoPent Double-Sided 10-Edge | MJ Medium-Duty Chipbreaker | Made in Japan
What is the most stable 10-edge insert for stainless steel milling?
The Tungaloy PNMU0905GNEN-MJ AH120 is a high-performance indexable milling insert from the innovative DoPent series. Featuring a unique pentagonal double-sided design, this insert provides 10 cutting edges, offering an unmatched balance of economy and structural rigidity. The AH120 PVD coated grade is specifically optimized for difficult-to-cut materials, providing extreme resistance to thermal shock and built-up edge when machining stainless steel, titanium, and heat-resistant alloys. Combined with the MJ chipbreaker for medium-duty cutting, it ensures smooth chip evacuation and reduced spindle load. This Japan-made face milling insert is the professional's choice for high-volume CNC machining where cost-per-edge and reliability are paramount.
Decoding the PNMU0905GNEN-MJ Nomenclature
P
Pentagonal
N
0° Relief
M
Tolerance
U
Fixing
09
Size
05
Thickness
GNEN
Geometry
MJ
Breaker
Technical Specs: Metric vs. Imperial Units
| ISO Parameter |
Metric Unit |
Imperial Designation |
| Inscribed Circle (IC) |
15.875 mm |
5/8 inch |
| Insert Thickness (S) |
5.64 mm |
0.222 inch |
| Wiper Width (BS) |
1.8 mm |
0.0709 inch |
| Cutting Edges |
10 (Double-Sided) |
10 (Double-Sided) |
Recommended Cutting Parameters (AH120 Grade)
-
Cutting Speed (Vc): 50 - 150 m/min (Stainless/Superalloys)
-
Feed per Tooth (fz): 0.10 - 0.35 mm/t (Optimized for MJ)
-
Coolant Usage: Wet cutting is recommended for Stainless Steel to prevent thermal cracking.
*Pro Tip: For machining austenitic stainless steel, use high-pressure coolant to improve chip flow. The AH120 grade provides excellent edge stability during interrupted cuts.*
Global Verified Customer Reviews
⭐⭐⭐⭐⭐ "Extreme Value per Edge" - Klaus M., Germany
"Switching to 10 edges significantly lowered our tooling costs. The AH120 grade is very reliable on our stainless valve housings."
⭐⭐⭐⭐⭐ "Perfect for Titanium" - Hiroshi S., Japan
"I use these for medical components. The MJ breaker handles gummy titanium chips better than anything else in the shop."
⭐⭐⭐⭐ "Great Stability" - Robert B., USA
"Ran these on a large plate job. No vibration even when pushing the feed. Tungaloy Japan quality is clear."
⭐⭐⭐⭐⭐ "Smooth Surface Finish" - Antonio P., Italy
"The wiper effect is excellent. We are getting mirror-like finishes on 316L stainless parts."
⭐⭐⭐⭐⭐ "Fast Shipping" - William T., Australia
"Authentic inserts. The pentagonal design is much more rigid than our old square inserts."
Technical Tooling Q&A
Q: Is PNMU0905 suitable for 90-degree shoulders?
A: No, the DoPent series uses a 45-degree lead angle. This is optimized for face milling and surface leveling, directing forces into the spindle for maximum stability.
Q: Why choose AH120 over AH725?
A: AH120 is superior for stainless steel and high-temp alloys (S/M groups). It has better resistance to thermal cracking, which is common when machining these heat-sensitive materials.
Q: Can I use this on cast iron?
A: Yes, it can be used, but for high-volume cast iron production, a dedicated grade like AH120's sibling AH725 or a K-group grade might offer longer life.
Expert Insight: PVD Coating Advantage
In CNC face milling, the PNMU0905 series with AH120 provides a strategic edge in productivity. The PVD coating allows for a sharper edge than CVD alternatives, which is crucial to prevent work hardening in stainless steel. Maximize your precision machining output with the power of 10 edges.
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