Precise Internal Thread Turning with 16IR NPT RT315
The 16IR 60° NPT full profile threading insert is specifically designed for cutting conical pipe threads. Equipped with the PVD-coated universal grade RT315, it enables process-reliable machining of various materials while ensuring consistent tool life.
Suitable materials

Technical data
- Insert size: 16
- Design: Inside thread (right direction)
- Thread Type: Pipe Thread NPT
- Profile: Full profile
- Flank angle: 60°
- Grade: RT315 (PVD-coated for universal use)
- Packaging Unit: 2 pc.
Dimensions of 16IR NPT RT315
| |
Item Nr. |
ISO |
TPI |
I.C. |
S |
d |
| 16IR-11.5NPT-G RT315 |
1881431 |
16 |
11,5 TPI |
9,525 |
3,52 |
4 |
16IR-14NPT-G RT315
|
1881432 |
16 |
14 TPI |
9,525 |
3,52 |
4 |
16IR-18NPT-G RT315
|
1881433 |
16 |
18 TPI |
9,525 |
3,52 |
4 |
Cutting data
| ISO |
Material |
Cutting Data |
| P |
Steel |
Vc= 80-150 m/min |
| M |
Stainless Steel |
Vc= 80-120 m/min |
| N |
NF-Metals |
Vc= 120-300 m/min |
| S |
Special Materials |
Vc= 20-60 m/min |
Applications
This cutting insert is intended for the production of internal NPT threads in industrial pipe machining, mechanical engineering, and valve manufacturing. The universal grade RT315 is suitable for steel, stainless steel, non-ferrous metals, and special materials, reliably covering a wide range of machining tasks.
Special features
The full profile ensures a precise and accurate thread form, which significantly minimizes the need for post-processing. Additionally, the PVD coating of the RT315 grade provides effective wear protection, leading to constant cutting performance and dependable productivity.