Looking for the best interrupted cut tools to tackle your machining challenges? We’ve curated a list of 10 top tools designed to deliver precise, clean cuts for steel, cast iron, and stainless steel, making your work easier and more efficient.
Interrupted cutting is a common challenge in machining, but with the right tools, it becomes a breeze. We’ve tested and reviewed the best interrupted cut tools to help you achieve precise, clean cuts every time. Whether you’re working with steel, cast iron, or stainless steel, these tools are designed to handle tough jobs with ease.
These tools are durable, reliable, and easy to use, making them perfect for both pros and beginners. Discover how they can transform your machining experience and save you time and effort.
List of Top 10 Interrupted Cut Tools
| Image | Title | Best For | Price |
|---|---|---|---|
 |
3 Pack LGT040D2R, .040″ Width, .100″ Depth, Uncoated Carbide, Sharp Corner, THINBIT Grooving Insert for Steel, cast Iron and Stainless Steel with Interrupted cuts |
This 3 Pack LGT040D2R is perfect for machinists and metalworkers who need precise grooving and multi-directional turning. It’s ideal for cutting steel, cast iron, and stainless steel with interrupted cuts. |
|
 |
THINBIT 3 Pack SGI040D2 0.040″ Width 0.100″ Depth, Uncoated Carbide, Sharp Corner, Grooving Insert for Steel, Cast Iron and Stainless Steel with Interrupted Cuts |
This THINBIT grooving insert is perfect for machinists and manufacturers who work with steel, cast iron, and stainless steel. It’s ideal for cutting o-rings, snap rings, and piston rings with precision and ease. |
|
 |
3 Pack SPT025D2 THINBIT LITTLEBIT ‘S’ Series Parting Insert, Uncoated Carbide for Steel, cast Iron and Stainless Steel with Interrupted cuts |
This 3 Pack SPT025D2 THINBIT LITTLEBIT ‘S’ Series Parting Insert is perfect for machinists and metalworkers who need precise cuts on steel, cast iron, and stainless steel. It’s ideal for working with precious metals, thin tubing, and small parts, helping you save material and reduce waste. |
|
 |
3 Pack LGT120D2R, .120″ Width, .250″ Depth, Uncoated Carbide, Sharp Corner, THINBIT Grooving Insert for Steel, cast Iron and Stainless Steel with Interrupted cuts |
This 3 Pack LGT120D2R is perfect for machinists and metalworkers who need precise cuts in steel, cast iron, and stainless steel. It’s ideal for grooving, parting, and multi-directional turning, making it a must-have for interrupted cuts. |
|
 |
THINBIT 3 Pack LGAT08D2RC ‘L’ Series, TiN Coated Carbide, Acme Threading Insert for 8 TPI in Steel, cast Iron and Stainless Steel with Interrupted cuts. |
This THINBIT Acme threading insert is perfect for machinists and manufacturers who need precise threading in steel, cast iron, or stainless steel. It’s ideal for interrupted cuts and works best with Large Series toolholders. |
|
 |
TNMG160404&TNMG160408 CBN-6 Boron Nitride Turning Insert with MTJNR1616H16 External Turning Lathe Cutting Tool Holder,High Speed Finishing of Heat Treated Steel,Sintered Ferrous Alloy and Cast Iron |
This CBN turning insert and tool holder set is perfect for machinists who work with hardened steel, cast iron, or sintered ferrous alloys. It’s ideal for high-speed finishing and interrupted cuts, delivering smooth surfaces without extra grinding. |
|
 |
THINBIT 3 Pack LGAT06D2R ‘L’ Series, Uncoated Carbide, Acme Threading Insert for 6 TPI in Steel, cast Iron and Stainless Steel with Interrupted cuts. |
This THINBIT 3 Pack LGAT06D2R is perfect for machinists and manufacturers who need reliable threading inserts for steel, cast iron, and stainless steel. It’s ideal for interrupted cuts and works best with Large Series toolholders. |
|
 |
CDBP TCMT090204 (TCMT1.8(1.5) 1) Carbide Turning Inserts with PM Chipbreaker for Steel, CVD Coated Lathe Tools for Continuous & Interrupted Cuts, 10 PCS |
These CDBP TCMT090204 carbide turning inserts are perfect for machinists and manufacturers who work with steel. They’re ideal for both continuous and interrupted cuts, offering sharpness, stability, and long-lasting performance. |
|
|
THINBIT 3 Pack SGI025D2 0.025″ Width 0.075″ Depth, Uncoated Carbide, Sharp Corner, Grooving Insert for Steel, Cast Iron and Stainless Steel with Interrupted Cuts |
This THINBIT grooving insert is perfect for machinists and manufacturers who work with steel, cast iron, and stainless steel. It’s ideal for cutting o-rings, snap rings, and piston rings with precision and ease. |
|
 |
3 Pack LGT125D2L, .125″ Width, .250″ Depth, Uncoated Carbide, Sharp Corner, THINBIT Grooving Insert for Steel, cast Iron and Stainless Steel with Interrupted cuts |
This 3 Pack LGT125D2L is perfect for machinists and metalworkers who need precise grooving and multi-directional turning on steel, cast iron, and stainless steel. It’s ideal for creating grooves, arcs, and angles with sharp corners and interrupted cuts. |
Detailed Reviews
Discover the top 10 interrupted cut tools handpicked for precision, durability, and performance. From uncoated carbide inserts to shock-resistant CBN tools, each product is designed to handle steel, cast iron, and stainless steel with ease. Whether you need grooving, threading, or parting, this guide ensures you find the perfect tool for your needs.
1. 3 Pack LGT040D2R, .040″ Width, .100″ Depth, Uncoated Carbide, Sharp Corner, THINBIT Grooving Insert for Steel, cast Iron and Stainless Steel with Interrupted cuts
The 3 Pack LGT040D2R is a reliable tool for precision cutting. It’s made of uncoated carbide, perfect for steel, cast iron, and stainless steel.
Cuts up to .100″ deep and works for parting stock up to .200″. Use it for grooving, arcs, and angles. Flush cuts are easy with this insert.
Works with Large series toolholders. Use it straight or at 90 degrees. DURA-MAX 2000 carbide ensures long-lasting performance.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This 3 Pack LGT040D2R is perfect for machinists and metalworkers who need precise grooving and multi-directional turning. It’s ideal for cutting steel, cast iron, and stainless steel with interrupted cuts.
Ready to Purchase?
2. THINBIT 3 Pack SGI040D2 0.040″ Width 0.100″ Depth, Uncoated Carbide, Sharp Corner, Grooving Insert for Steel, Cast Iron and Stainless Steel with Interrupted Cuts
The THINBIT 3 Pack SGI040D2 is a sharp corner grooving insert made from uncoated carbide. It’s perfect for cutting steel, cast iron, and stainless steel.
This insert works great for o-rings, snap rings, and piston rings. It cuts close to the collet face or shoulder and handles plunge grooving up to 0.100″ deep.
Use it with Small series toolholders for interrupted cuts. Check the Downloads section for detailed product info and compatible tools.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This THINBIT grooving insert is perfect for machinists and manufacturers who work with steel, cast iron, and stainless steel. It’s ideal for cutting o-rings, snap rings, and piston rings with precision and ease.
Ready to Purchase?
3. 3 Pack SPT025D2 THINBIT LITTLEBIT ‘S’ Series Parting Insert, Uncoated Carbide for Steel, cast Iron and Stainless Steel with Interrupted cuts
The 3 Pack SPT025D2 THINBIT LITTLEBIT ‘S’ Series Parting Insert is a powerful tool for cutting. It works with steel, cast iron, and stainless steel. Use it for interrupted cuts with ease.
Its narrow widths reduce waste and part bending. It’s perfect for thin materials and small parts. Cuts close to the collet face or shoulder.
Made with uncoated DURA-MAX 2000 carbide, it’s durable and reliable. Works with Small series toolholders for smooth operation.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This 3 Pack SPT025D2 THINBIT LITTLEBIT ‘S’ Series Parting Insert is perfect for machinists and metalworkers who need precise cuts on steel, cast iron, and stainless steel. It’s ideal for working with precious metals, thin tubing, and small parts, helping you save material and reduce waste.
Ready to Purchase?
4. 3 Pack LGT120D2R, .120″ Width, .250″ Depth, Uncoated Carbide, Sharp Corner, THINBIT Grooving Insert for Steel, cast Iron and Stainless Steel with Interrupted cuts
The 3 Pack LGT120D2R is a sharp corner grooving insert made from uncoated carbide. It’s perfect for steel, cast iron, and stainless steel. Use it for grooving, turning, and parting with interrupted cuts.
This insert cuts up to .250″ deep and parts stock up to .500″. It works flush to the collet face or shoulder for clean, precise cuts.
Designed for multi-directional turning, it creates grooves, arcs, and angles. Use it with Large series toolholders for RH straight or LH 90-degree cuts.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This 3 Pack LGT120D2R is perfect for machinists and metalworkers who need precise cuts in steel, cast iron, and stainless steel. It’s ideal for grooving, parting, and multi-directional turning, making it a must-have for interrupted cuts.
Ready to Purchase?
5. THINBIT 3 Pack LGAT08D2RC ‘L’ Series, TiN Coated Carbide, Acme Threading Insert for 8 TPI in Steel, cast Iron and Stainless Steel with Interrupted cuts.
The THINBIT LGAT08D2RC is a TiN-coated carbide insert designed for Acme threading. It works with steel, cast iron, and stainless steel, even with interrupted cuts.
This insert is patented and fits Large Series toolholders. It handles 8 TPI threads and has a 29-degree angle for right-hand threading.
Key details: 1.250″ minimum bore, threading near shoulders, and U.S. patents for unique design.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This THINBIT Acme threading insert is perfect for machinists and manufacturers who need precise threading in steel, cast iron, or stainless steel. It’s ideal for interrupted cuts and works best with Large Series toolholders.
Ready to Purchase?
6. TNMG160404&TNMG160408 CBN-6 Boron Nitride Turning Insert with MTJNR1616H16 External Turning Lathe Cutting Tool Holder,High Speed Finishing of Heat Treated Steel,Sintered Ferrous Alloy and Cast Iron
This CBN Turning Inserts & CNC Tool Holder Set is perfect for hardened steel machining. It includes TNMG160404 and TNMG160408 boron nitride inserts with a MTJNR1616H16 holder.
The shock-resistant CBN material handles interrupted cuts in hardened steels and cast iron. It also delivers a mirror finish on hardened steels, removing the need for grinding operations.
High-speed machining is stable. The tool holder ensures vibration-free turning. Easy to use and highly effective.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This CBN turning insert and tool holder set is perfect for machinists who work with hardened steel, cast iron, or sintered ferrous alloys. It’s ideal for high-speed finishing and interrupted cuts, delivering smooth surfaces without extra grinding.
Ready to Purchase?
7. THINBIT 3 Pack LGAT06D2R ‘L’ Series, Uncoated Carbide, Acme Threading Insert for 6 TPI in Steel, cast Iron and Stainless Steel with Interrupted cuts.
The THINBIT 3 Pack LGAT06D2R is a high-quality threading insert designed for precision work. It’s perfect for steel, cast iron, and stainless steel with interrupted cuts.
This insert uses uncoated DURA-MAX 2000 carbide, ensuring durability and performance. It’s made for 6 TPI threading with a 29-degree angle. Works best with Large Series toolholders.
Ideal for internal threading, it handles bores as small as 1.250 inches. The right-hand orientation allows threading near shoulders up to .070 inches. Patented design ensures reliable results.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This THINBIT 3 Pack LGAT06D2R is perfect for machinists and manufacturers who need reliable threading inserts for steel, cast iron, and stainless steel. It’s ideal for interrupted cuts and works best with Large Series toolholders.
Ready to Purchase?
8. CDBP TCMT090204 (TCMT1.8(1.5) 1) Carbide Turning Inserts with PM Chipbreaker for Steel, CVD Coated Lathe Tools for Continuous & Interrupted Cuts, 10 PCS
CDBP TCMT090204 carbide turning inserts are CVD coated for maximum wear resistance. They’re designed for steel and handle both continuous and interrupted cuts. Each box includes 10 high-performance inserts.
These inserts feature a PM chipbreaker for sharp, stable machining. Their multi-layer coating ensures temperature stability during high-speed operations.
| Pros | Cons |
|---|---|
|
|
Perfect For:
These CDBP TCMT090204 carbide turning inserts are perfect for machinists and manufacturers who work with steel. They’re ideal for both continuous and interrupted cuts, offering sharpness, stability, and long-lasting performance.
Ready to Purchase?
9. THINBIT 3 Pack SGI025D2 0.025″ Width 0.075″ Depth, Uncoated Carbide, Sharp Corner, Grooving Insert for Steel, Cast Iron and Stainless Steel with Interrupted Cuts
The THINBIT 3 Pack SGI025D2 is a sharp corner grooving insert designed for precision cutting. It works well with steel, cast iron, and stainless steel, especially for interrupted cuts.
This insert is perfect for o-rings, snap rings, and piston rings. It can cut within 1/16″ of the collet face or shoulder and handle plunge grooving up to 0.075″ deep.
Made from uncoated DURA-MAX 2000 carbide, it’s durable and reliable. Use it with Small series toolholders for best results.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This THINBIT grooving insert is perfect for machinists and manufacturers who work with steel, cast iron, and stainless steel. It’s ideal for cutting o-rings, snap rings, and piston rings with precision and ease.
Ready to Purchase?
10. 3 Pack LGT125D2L, .125″ Width, .250″ Depth, Uncoated Carbide, Sharp Corner, THINBIT Grooving Insert for Steel, cast Iron and Stainless Steel with Interrupted cuts
The 3 Pack LGT125D2L is a sharp corner grooving insert made from uncoated carbide. It’s perfect for steel, cast iron, and stainless steel. Use it for grooving, parting, and multi-directional turning.
This insert cuts up to .250″ deep and works with Large series toolholders. It’s ideal for interrupted cuts and flush cutting.
| Pros | Cons |
|---|---|
|
|
Perfect For:
This 3 Pack LGT125D2L is perfect for machinists and metalworkers who need precise grooving and multi-directional turning on steel, cast iron, and stainless steel. It’s ideal for creating grooves, arcs, and angles with sharp corners and interrupted cuts.
Ready to Purchase?
Buying Guide
Interrupted cutting can be tricky, but the right tools make it easy. We’ve tested the best interrupted cut tools to help you get clean, precise cuts every time. Whether you’re a pro or beginner, these tools will save you time and effort.
Factors to Consider When Buying Interrupted Cut Tools:
– Material Compatibility: Choose tools designed for the materials you work with, like steel, cast iron, or stainless steel.
– Cut Depth and Width: Ensure the tool’s depth and width match your project needs for accurate cuts.
– Coating: Tools with coatings like TiN or CVD offer better durability and wear resistance.
– Tool Holder Compatibility: Check if the insert works with your toolholder series (e.g., Large or Small).
– Cut Type: Select tools for specific cuts like grooving, parting, or threading.
– Durability: Look for high-quality materials like carbide or boron nitride for long-lasting performance.
– Ease of Use: Pick tools that are easy to handle and work well for interrupted cuts.
– Precision: Tools with sharp corners and flush-cutting ability ensure clean results.
With these factors in mind, you’ll find the perfect interrupted cut tool for your needs.