Tungaloy RCMT0803MO-61 T9115 Round CVD Coated Steel Turning Insert

$77.38 USD

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Description

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 T9115 is an industry-leading round carbide turning insert engineered for high-productivity steel machining. Featuring the advanced T9115 CVD coated grade, this insert is built to withstand extreme temperatures and maintain edge sharpness during continuous high-speed cutting. The 61 chipbreaker is specialized for light-duty finishing, providing exceptional chip control and reducing cutting forces. This Japan-made CNC turning insert is the ultimate choice for profiling and machining carbon and alloy steels where surface integrity and tool life are the top priorities.

Superior T9115 Coating

Multi-layered CVD coating with a thick Al2O3 layer provides unmatched thermal protection and resistance to plastic deformation.

Maximum Edge Strength

The RCMT round geometry eliminates weak corners, making it perfect for heavy profiling and varying feed directions.

Optimized 61 Breaker

Specifically designed for shallow finishing cuts, ensuring small, manageable chips and a superior surface finish.

Decoding the RCMT0803MO-61 Technical Designation

R
Round
C
7° Relief
M
Tolerance
T
Hole/Fix
08
8mm Size
03
3.18mm Thick
MO
Tip Style
61
Breaker

3. Technical Specifications: Metric vs. Imperial

ISO Parameter Metric Designation Imperial Designation
Inscribed Circle (IC) 8.0 mm 0.315 inch
Thickness (S) 3.18 mm 1/8 inch
Corner Radius (RE) 4.0 mm (Full Round) 0.157 inch
Hole Diameter (D1) 3.4 mm 0.134 inch

Recommended Cutting Parameters (T9115 Grade)

  • Cutting Speed (Vc): 180 - 450 m/min (Depending on steel alloy)
  • Feed Rate (f): 0.05 - 0.25 mm/rev (Ideal for 61 chipbreaker)
  • Depth of Cut (Ap): 0.2 - 2.0 mm (Flexible range)

*Pro Advice: Higher cutting speeds help in reducing material sticking on the tool tip in low-carbon steel applications.*

4. Product Applications

  • Profiling and finishing of carbon and alloy steels.
  • Large-diameter shaft finishing in automotive and energy.
  • High-feed semi-finishing of precision mold components.
  • CNC Lathe profiling on rigid, high-RPM machines.

5. Tool Compatibility

Perfectly compatible with standard SRGCR/L or SRDCN turning tool holders designed for 8mm round inserts (ISO Size 0803). Designed for maximum stability in high-production environments.

7. Why Choose CNCHome-Beyond?

100% Genuine
Original Tungaloy Japan
OEM Authority
Supplier to Geely Auto
Technical Experts
Optimized Parameter Support
Global Shipping
Fast Delivery Worldwide

Global Verified Reviews

⭐⭐⭐⭐⭐ "High-Speed Beast" - J. Hoffman, Germany
"T9115 is simply the best for continuous turning. We ran this RCMT0803 at 420 m/min and the wear was negligible even after a full shift."

⭐⭐⭐⭐⭐ "Strong Round Geometry" - Takeshi S., Japan
"Profiling complex radii is so much safer with round inserts. No corner chipping like CNMG. Tungaloy Japan quality is obvious."

⭐⭐⭐⭐ "Great for Light Finish" - Mark R., USA
"The 61 breaker handles shallow depths perfectly. No long chips wrapping around the spindle."

⭐⭐⭐⭐⭐ "Consistent Tool Life" - Luca B., Italy
"Excellent consistency. When you swap an insert, the offsets barely move. Great for automation."

⭐⭐⭐⭐⭐ "Fast Delivery" - A. Miller, UK
"Genuine parts arrived on time. The performance in 4140 steel is night and day compared to generic brands."

8. FAQ - Common Technical Questions

Q: Is T9115 suitable for interrupted cutting?

A: T9115 is optimized for continuous high-speed turning. For interrupted cuts, we recommend a grade like T9125 or Tungaloy's PVD grades.

Q: Can I use this on Stainless Steel?

A: T9115 is an ISO P (Steel) grade. For Stainless Steel (ISO M), please check Tungaloy AH630 or AH645 grades.

Q: What is the benefit of the 61 chipbreaker?

A: It is designed for 'Light Cut' finishing. It provides low cutting resistance and excellent chip evacuation in shallow cuts.

Expert Insight: The CVD T9115 Advantage

In high-productivity CNC turning, the T9115 grade's thick alumina (Al2O3) layer acts as a massive thermal barrier. This prevents crater wear and heat-induced plastic deformation at the cutting edge, allowing the RCMT0803 to maintain dimensional precision and mirror-like finishes over massive production batches.

© Technical Data by cnchome-beyond.com - Industrial Excellence

Technical FAQ & Buying Guide

Are your carbide inserts interchangeable with major brands like Sandvik, Iscar, or Kennametal?

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.

How do I choose the correct insert grade and chipbreaker for machining Stainless Steel (M) vs. Carbon Steel (P)?

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.
What are the recommended cutting speed (Vc) and feed rate (f) parameters to maximize tool life?

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.
Do you offer bulk discounts or wholesale pricing for machine shops and distributors?

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.

What is your international shipping policy and typical lead time for orders?

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.

How do you guarantee the quality and tolerance precision of your CNC tools?

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.