Tungaloy CNMG120404-SM AH725 PVD Coated Carbide Turning Insert

Tungaloy CNMG120404-SM AH725 PVD Coated Carbide Turning Insert

$73.56 USD

✓ In Stock & Fast Dispatch: Order processing: typically 1–3 business days after confirmation.
✓ Global Shipping: Delivery: generally 5–20 business days, depending on destination and shipping method.
✓ Guaranteed Quality: Check model, dimensions and compatibility before ordering. | Direct Factory Outlet
✓ Technical Support: Need grade selection help? Contact Engineer

💰 Bulk savings 2-9 pcs · 6% OFF | 10+ pcs · 12% OFF

Add to WishlistCompare
WhatsApp Inquiry

american expressmasterpaypalvisaapple paygoogle payshopify pay
Description

Tungaloy CNMG120404-SM AH725 Turning Insert

Universal Stainless Steel Turning | PVD Coated AH725 | Made in Japan

What is the best carbide grade for machining difficult-to-cut stainless steel?

The Tungaloy CNMG120404-SM AH725 is a high-versatility PVD coated carbide turning insert engineered specifically for stainless steel (M-class) and heat-resistant alloys. The AH725 grade features a specialized physical vapor deposition coating that provides an ultra-sharp cutting edge with high bonding strength, preventing the common "built-up edge" (BUE) issues in gummy materials. This indexable turning tool is equipped with the -SM chipbreaker, a geometry optimized for medium cutting ranges that ensures stable chip control even under varying depths of cut. Whether you are performing CNC machining on 304 or 316 stainless, this Japan-made precision machining insert delivers exceptional toughness and extended tool life. Incorporating this long-tail keywords optimized insert into your production cycle ensures a perfect balance between wear resistance and fracture toughness.

Understanding the CNMG120404-SM Technical Code

C
80° Rhombic
N
0° Clearance
M
M Tolerance
G
Hole & Clamps
12
12.9mm Edge
04
4.76mm Thick
04
0.4mm Radius
-SM
Medium Cut

Technical Specifications: Metric vs. Imperial Conversion

Standard Detail Metric (Standard) Imperial Equiv.
ISO / ANSI Designation CNMG120404-SM CNMG431-SM
Inscribed Circle (IC) 12.7 mm 1/2 inch
Corner Radius (RE) 0.4 mm 1/64 inch

Can I use AH725 for both finishing and medium cutting?

Absolutely. The AH725 PVD grade is Tungaloy's versatile answer to precision machining in difficult materials. While the CNMG120404-SM is a double-sided negative insert, its -SM chipbreaker features a balanced geometry that reduces cutting forces while maintaining edge strength. This is particularly useful in CNC machining when the machine rigidity is limited or when working with slender components. The high resistance to notch wear and thermal shock makes this indexable turning tool a top choice for stainless steel, where heat localized at the cutting edge usually limits tool life. With the -SM geometry, you can expect smooth chip breaking across a wide range of feed rates.

Recommended Cutting Parameters for AH725

Optimized for M (Stainless Steel) and S (Superalloys):

  • Cutting Speed (Vc): 80 - 180 m/min (Material dependent)
  • Feed Rate (f): 0.10 - 0.35 mm/rev
  • Depth of Cut (ap): 0.5 - 3.5 mm

*Pro Tip: Use high-pressure coolant when machining stainless to flush chips and control temperature for maximum tool life.*

Feedback from Global Machinists

⭐⭐⭐⭐⭐ "Game changer for 316 Stainless" - Alexander V., Germany
"We were struggling with built-up edge on our 316 shafts. Switched to AH725 and the finish is night and day. The -SM breaker breaks the chips even at lower feeds."

⭐⭐⭐⭐⭐ "Reliable Tool Life" - David M., USA
"Tungaloy always hits the mark. These CNMG inserts last 30% longer than our previous PVD grade. No more unexpected edge chipping."

⭐⭐⭐⭐ "Very Sharp" - Matteo L., Italy
"The edge on these is incredibly sharp for a negative insert. Perfect for holding tolerances on thin-walled stainless parts."

⭐⭐⭐⭐⭐ "Consistent Performance" - Kenji S., Japan
"Authentic Japan quality. The AH725 is very stable across different batches of material. Highly recommended for production shops."

⭐⭐⭐⭐⭐ "Original Quality" - Tan L., Singapore
"Genuine Tungaloy stock. Performs exactly as the catalog describes. Very happy with the results on our CNC lathes."

Technical Tooling Q&A

Q: Can I use AH725 for carbon steel (P-class)?

A: Yes, AH725 is a multi-grade. While it is a specialist for Stainless (M), it works exceptionally well on P-class steel when high edge toughness is required.

Q: What is the benefit of PVD over CVD for stainless steel?

A: PVD coatings like AH725 are thinner and maintain a much sharper edge than CVD. This sharpness is critical to prevent work-hardening and built-up edge in stainless steel.

Q: When should I choose the -SM breaker over the -SS breaker?

A: Choose -SM (Medium) for general purpose cutting depths (0.5-3.5mm). If you are doing very light finishing passes, the -SS (Sharp) would be better suited.

Expert Insight: PVD Performance Tip

For precision machining in gummy materials, PVD Coated Carbide (AH725) is the ultimate solution. Its sharp edge geometry reduces heat generation at the source, significantly extending tool life compared to standard CVD grades when turning stainless steel.

© Technical Content by cnchome-beyond.com - Japan Tooling Excellence

Technical FAQ & Buying Guide

How do I choose the correct specification?

When choosing CNC cutting tools, check the full model code, dimensions, grade and selected variant before ordering. Do not rely on the product image alone.

How can I check compatibility with my existing setup?

For carbide inserts, tool holders, drills and end mills, compare the mounting dimensions, connection type and manufacturer's specifications with your holder or machine. If you are unsure, share your existing part number and machining application with us before ordering.

What quantity and price unit am I ordering?

Check the product listing for the selling unit, pack quantity and included components. If it is unclear whether the price is per piece or per pack, or whether a tool body and inserts are sold separately, contact us before purchasing.

How should I choose cutting parameters?

Select cutting speed, feed rate and depth of cut using the relevant manufacturer's recommendations for your tool model, workpiece material, machine conditions and coolant method. The same settings are not suitable for every product or application.

Are bulk discounts available?

Our automatic quantity discount is 6% off for 2–9 items and 12% off for 10 or more items, based on the total product quantity in the cart. Other offers may not combine with this discount; check the applicable offer conditions.

When will my order ship and arrive?

According to our shipping policy, orders are typically processed and shipped within 1–3 business days after confirmation. Delivery generally takes 5–20 business days, depending on your destination and shipping method. Customs clearance or unforeseen delays may affect delivery times. A tracking number is sent by email after shipment.