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Tungaloy RCMT0502MO-61 T9115 Round CVD Coated Turning Insert - BEYOND

Tungaloy RCMT0502MO-61 T9115 Round CVD Coated Turning Insert

$58.99 USD
Tungaloy RCMT0502MO-61 T9115 Insert Round Positive Turning | 61 Finishing Breaker | Premium T9115 CVD Grade What is the best round insert for high-speed steel turning? The Tungaloy RCMT0502MO-61 T9115...
Tungaloy RCMT0502MO-61 T9215 Round Carbide Turning Insert for Steel Machining

Tungaloy RCMT0502MO-61 T9215 Round Carbide Turning Insert for Steel Machining

$41.78 USD
Tungaloy RCMT0502MO-61 T9215 Indexable Round Carbide Turning Insert Which carbide insert is best optimized for high-speed finish turning of steel profiles with excellent chip control? The Tungaloy RCMT0502MO-61 T9215 is...
Tungaloy RCMT0803MO-61 TH10 Round Carbide Insert for Aluminum & Copper

Tungaloy RCMT0803MO-61 TH10 Round Carbide Insert for Aluminum & Copper

$55.54 USD
Tungaloy RCMT0803MO-61 TH10 Insert Non-Ferrous Precision | 61 Finishing Breaker | Sub-Micron TH10 Grade Which round insert provides a mirror finish on aluminum parts? The Tungaloy RCMT0803MO-61 TH10 is a...
Tungaloy RCMT0602MO-61 TH10 Round Carbide Insert for Non-Ferrous Metals

Tungaloy RCMT0602MO-61 TH10 Round Carbide Insert for Non-Ferrous Metals

$53.24 USD
Tungaloy RCMT0602MO-61 TH10 Insert Non-Ferrous Specialist | 61 Finishing Breaker | Sub-Micron TH10 Grade What is the best round insert for aluminum and copper turning? The Tungaloy RCMT0602MO-61 TH10 is...
Tungaloy RCMT0803MO-61 T9125 Round Carbide Steel Turning Insert

Tungaloy RCMT0803MO-61 T9125 Round Carbide Steel Turning Insert

$77.38 USD
Tungaloy RCMT0803MO-61 T9125 Insert Universal Steel Turning | 61 Finishing Breaker | Versatile T9125 CVD Grade How do I choose the best round insert for general steel machining? The Tungaloy...
Tungaloy RCMT0502MO-61 T9125 Round Carbide Steel Turning Insert

Tungaloy RCMT0502MO-61 T9125 Round Carbide Steel Turning Insert

$58.99 USD
Tungaloy RCMT0502MO-61 T9125 Insert Stable Steel Turning | 61 Finishing Breaker | Versatile T9125 CVD Grade What is the best round insert for interrupted steel cuts? The Tungaloy RCMT0502MO-61 T9125...
Tungaloy RCMT0803MO-61 T9115 Round CVD Coated Steel Turning Insert

Tungaloy RCMT0803MO-61 T9115 Round CVD Coated Steel Turning Insert

$77.38 USD
Tungaloy RCMT0803MO-61 T9115 Insert Professional Round Turning | 61 Finishing Breaker | Premium T9115 CVD Grade What is the most durable round insert for high-speed steel finishing? The Tungaloy RCMT0803MO-61...
Tungaloy RCMT0602MO-61 T9115 Round CVD Coated Steel Turning Insert

Tungaloy RCMT0602MO-61 T9115 Round CVD Coated Steel Turning Insert

$61.29 USD
Tungaloy RCMT0602MO-61 T9115 Insert Round Positive Turning | 61 Finishing Breaker | Premium T9115 CVD Grade Which round insert is best for high-speed steel profiling? The Tungaloy RCMT0602MO-61 T9115 is...
Tungaloy RCMT0803MO-61 NS9530 Round Cermet Turning Insert

Tungaloy RCMT0803MO-61 NS9530 Round Cermet Turning Insert

$48.64 USD
Tungaloy RCMT0803MO-61 NS9530 Insert Precision Round Turning | 61 Finishing Breaker | Premium NS9530 Cermet How do I achieve a mirror-like surface finish on steel shafts? The Tungaloy RCMT0803MO-61 NS9530...
Tungaloy RCMT0602MO-61 NS9530 Positive Round Cermet Turning Insert

Tungaloy RCMT0602MO-61 NS9530 Positive Round Cermet Turning Insert

$46.34 USD
Tungaloy RCMT0602MO-61 NS9530 Insert Precision Round Turning | 61 Finishing Breaker | Premium NS9530 Cermet How can I achieve a mirror-like finish on carbon steel parts? The Tungaloy RCMT0602MO-61 NS9530...
Tungaloy RCMT0502MO-61 NS9530 Positive Round Cermet Turning Insert

Tungaloy RCMT0502MO-61 NS9530 Positive Round Cermet Turning Insert

$46.34 USD
Tungaloy RCMT0502MO-61 NS9530 Insert High-Precision Round Turning | 61 Finishing Breaker | Premium NS9530 Cermet What is the best cermet insert for high-speed finishing? The Tungaloy RCMT0502MO-61 NS9530 is a...
Tungaloy RPMT/W AH120 Round Milling Inserts | RPMT08T2 RPMT10T3 RPMT1204 - BEYOND

Tungaloy RPMT/W AH120 Round Milling Inserts | RPMT08T2 RPMT10T3 RPMT1204

$40.60 USD – $53.05 USD
Tungaloy RPMT & RPMW AH120 Series High-Stability Round Milling | PVD Coated AH120 | Universal Steel Grade What are the best round milling inserts for general steel and stainless? The...
Tungaloy RCMM1003MO-61 NS9530 Round Cermet Turning Insert - BEYOND

Tungaloy RCMM1003MO-61 NS9530 Round Cermet Turning Insert

$46.34 USD
Tungaloy RCMM1003MO-61 NS9530 Insert Round Positive Turning | 61 Finishing Chipbreaker | Premium NS9530 Cermet What is the best cermet insert for achieving a mirror finish on steel? The Tungaloy...

Tungaloy RC RP RD Series Round Turning Inserts | RCMT RPMT RDMT

Tungaloy RC, RP & RD Round Turning Inserts

Infinite Profiling | Maximum Edge Strength | Superior Surface Finish

Which round insert is best for heavy profiling and interrupted cuts in tough materials?

The Tungaloy RC, RP, and RD Series (featuring RCMT, RPMT, and RDMT) are the ultimate choice for applications requiring maximum cutting edge strength. Round inserts are unique because they lack a weak "point," allowing them to handle massive depths of cut and extreme interrupted cycles that would shatter a rhombic or triangular insert. Tungaloy’s round series utilizes PremiumTec CVD and Multi-layer PVD coatings (like AH725 and T9215) to combat heat and wear. With specialized chipbreakers such as the -MJ (Medium) and -61 (Roughing), these inserts excel in profiling complex radii and heavy facing. The round geometry also allows for "stepless" indexing, giving you more usable life per insert compared to any other shape.

Decoding Tungaloy Round Series Nomenclature

R
Round
C / P / D
Relief Angle
M / G
Tolerance
T
Hole/Fix
10 / 12
Size (mm)
03 / 04
Thickness
00
Full Radius

Indestructible Edge

Round geometry distributes cutting forces evenly, preventing tip breakage and allowing for extreme feed rates (f) in roughing.

Multi-Directional Machining

Optimized for profiling complex curved shapes, spherical turning, and deep cavity roughing where square inserts cannot reach.

Maximum Heat Dissipation

Large contact area between the insert and the holder ensures superior thermal stability during long-running production cycles.

ISO vs. ANSI Model Cross-Reference

ISO Metric ANSI Imperial Diameter (mm) Thickness (mm)
RCMT 100300-MJ RCMT 32.5-MJ 10.0 3.18
RCMT 120400-MJ RCMT 43-MJ 12.0 4.76
RPMT 10T300 RPMT 33 10.0 3.97

Recommended Cutting Parameters

Steel Roughing (T9215) Vc: 120-250 m/min | f: 0.25-0.80 mm/rev
Stainless Profiling (AH725) Vc: 80-160 m/min | f: 0.15-0.45 mm/rev

Matching Tool Holders

Compatible with SRGCR/L and SRDCN External Tool Holders

View Compatible Round Holder Stock

Common Applications

  • Profiling of turbine blades and aircraft engine parts.
  • Heavy face turning of rough-cast surfaces.
  • Boring and cavity roughing in die and mold industry.
  • Spherical turning for hydraulic ball joints.

Equipment Compatibility

Fully compatible with Haas, Mazak, Doosan, Okuma, and DMG Mori CNC machines. Works effectively on both heavy-duty manual lathes and high-speed CNC centers.

Tungaloy Round Grade Strategy

Grade Technology Primary Workpiece
T9215 CVD PremiumTec Carbon & Alloy Steels
AH725 PVD Multi-Layer Stainless & Superalloys
T5115 CVD Rugged Grey & Ductile Cast Iron

The BEYOND CNC Commitment

Certified Authentic
Tungaloy Japan Official
Industrial Bulk Pricing
Optimized B2B Logistics
Technical Edge
Expert CNC Director Advice

Global Industry Feedback

⭐⭐⭐⭐⭐ "Bulletproof Profiling" - James W., USA
"We use RCMT 1204 for profiling chrome-moly shafts. The AH725 grade lasts significantly longer than other brands under heavy heat."

⭐⭐⭐⭐⭐ "Great for Mold Bases" - U. Müller, Germany
"RDMT inserts are our standard for roughing out large mold cavities. Very stable even at high feed rates."

⭐⭐⭐⭐ "Very Economical" - S. Tanaka, Japan
"Round inserts give us so many indexable positions. BEYOND CNC shipping was fast and the product is 100% original."

Technical FAQ

Q: When should I choose RC over CNMG?

A: Choose Round (RC) when the geometry of the part requires a radius, or when you are facing extreme interrupted cuts where an 80-degree corner would fail.

Q: How many times can I index a round insert?

A: Technically, you can index a round insert to any position, but practically, most machinists get 4-8 distinct cutting zones depending on the depth of cut.

Tech Tip: Notch Wear Management

Round inserts are prone to "notch wear" at the depth-of-cut line in abrasive materials. To maximize life, vary your depth of cut (Ap) slightly between passes to move the wear point across the radius. **BEYOND CNC** - Industrial Strength Solutions.

© Technical Document by Beyond Li - CNC Tooling Technical Director