Best Internal Grooving Inserts of 2026

Brian Howie Avatar
Brian Howie
Last Updated: Jan 8, 2026

* We independently evaluate all recommended products and services. If you click on links we provide, we may receive compensation.

Internal grooving inserts are essential tools used in machining processes to create grooves or channels on the interior surfaces of workpieces. These inserts are designed with precision cutting edges and are available in various shapes and sizes to accommodate different groove dimensions and depths. Made from high-quality materials such as carbide or cermet, these inserts offer excellent durability and wear resistance, ensuring long-lasting performance. With their superior cutting capabilities and versatility, internal grooving inserts are widely used in industries such as automotive, aerospace, and manufacturing to achieve precise and efficient grooving operations.

At a Glance: Our Top Picks

Zouzmin MGEHR/L MGIVR/L Lathe Tool Holder Set Cover #TOP 1
Zouzmin MGEHR/L MGIVR/L Lathe Tool Holder Set
ftb score rating icon 9.9
Accusize Industrial Tools 1/2'' Heavy Duty Indexable Grooving/Cut-Off Holder, Nickel Plated, with 11 Gtn-2 Tin Coated Carbide Inserts, 2415-5024INS Cover #TOP 2
Accusize Industrial Tools 1/2'' Heavy Duty Indexable Grooving/Cut-Off Holder, Nickel Plated, with 11 Gtn-2 Tin Coated Carbide Inserts, 2415-5024INS
ftb score rating icon 9.8
LAHDYFHOE GBJ MGIVR2016-2 with MGMN200-G 3020 Grooving Cut-Off Cutter Grooving Insert Boring Bar 16mm 5/8" Grooving Cut-Off Holder Cover #TOP 3
LAHDYFHOE GBJ MGIVR2016-2 with MGMN200-G 3020 Grooving Cut-Off Cutter Grooving Insert Boring Bar 16mm 5/8" Grooving Cut-Off Holder
ftb score rating icon 9.6

Top 10 Internal Grooving Inserts

#TOP 1

Zouzmin MGEHR/L MGIVR/L Lathe Tool Holder Set

zouzmin001
Zouzmin MGEHR/L MGIVR/L Lathe Tool Holder Set Cover
Zouzmin 5/8 ", 3/8" MGEHR/L MGIVR/L Lathe Grooving Cut-Off Parting Tool Holder with MGMN150/200 Carbide Grooving Inserts for Steel (2pcs 5/8 Grooving Holders with 10pcs mgmn150 Inserts)

The Zouzmin Lathe Tool Set includes two durable grooving tool holders and ten carbide inserts. These holders are designed for both right and left-hand internal grooving, making them versatile for different tasks. The precision of the MGMN150 and MGMN200 inserts allows for grooving widths of 1.5mm and 2mm, respectively, ensuring clean cuts in steel and similar materials. With a robust construction of 42CrMo steel, these tools offer high strength and resistance to wear, enhancing their longevity and performance in various working environments.

What We Like
Durable construction
Versatile for right/left hand
Long tool life
Sharp, wear-resistant inserts
Efficient for steel processing
#TOP 2

Accusize Industrial Tools 1/2'' Heavy Duty Indexable Grooving/Cut-Off Holder, Nickel Plated, with 11 Gtn-2 Tin Coated Carbide Inserts, 2415-5024INS

Accusize Industrial Tools 1/2'' Heavy Duty Indexable Grooving/Cut-Off Holder, Nickel Plated, with 11 Gtn-2 Tin Coated Carbide Inserts, 2415-5024INS Cover
Accusize Industrial Tools 1/2'' Heavy Duty Indexable Grooving/Cut-Off Holder, Nickel Plated, with 11 Gtn-2 Tin Coated Carbide Inserts, 2415-5024INS

The Accusize Grooving/Cut-Off Holder is a high-quality tool designed for precision grooving and turning tasks. With its durable construction and nickel plating, it offers stability and precision clamping for accurate results. The tool is versatile and can be used for various applications, including shallow grooving, profile turning, relief grooving, and high production tasks. It also allows for the opening of wide grooves through plunging and side turning. The Accusize Grooving/Cut-Off Holder comes with 11 GTN-2 Tin Coated Carbide Inserts, ensuring long-lasting performance. With this tool, you can achieve precise and efficient grooving and turning operations, making it a valuable addition to any workshop or industrial setting.

What We Like
Precision clamping
Versatile applications
Durable construction
#TOP 3

LAHDYFHOE GBJ MGIVR2016-2 with MGMN200-G 3020 Grooving Cut-Off Cutter Grooving Insert Boring Bar 16mm 5/8" Grooving Cut-Off Holder

MGIVR2016-2 MGMN200-G
LAHDYFHOE GBJ MGIVR2016-2 with MGMN200-G 3020 Grooving Cut-Off Cutter Grooving Insert Boring Bar 16mm 5/8" Grooving Cut-Off Holder Cover
GBJ MGIVR2016-2 with MGMN200-G 3020 Grooving Cut-Off Cutter Grooving Insert Boring Bar 16mm 5/8" Grooving Cut-Off Holder for MGMN200 Carbide Inserts Holder

The LAHDYFHOE Grooving Cut-Off Holder is a versatile tool designed for processing steel and stainless steel parts. It features MGMN200 inserts made of solid carbide with a tin coating, offering strong impact resistance and high precision. The CVD coating on the inserts provides excellent wear resistance, ensuring a long tool life and faster cutting speed. The MGIVR2016-2 cutting holder is constructed from strong steel and comes with laser lettering and anti-rust oil to prevent oxidation. With its vacuum hardening and exquisite craftsmanship, this holder provides easy cutting and is not prone to sticking to the workpieces. The LAHDYFHOE Grooving Cut-Off Holder is a durable and convenient tool for all your grooving needs.

What We Like
Durable
High precision
Excellent wear resistance
#TOP 4

CDBP MRMN300-M Carbide Grooving Inserts

MRMN300-M
Yellow
MRMN300-M
CDBP MRMN300-M Carbide Grooving Inserts Cover
CDBP MRMN300-M Carbide Grooving Inserts for MGEHR/L and MGIVR/L Grooving Cut-Off Tool Holder, CVD Yellow Coating, 10pcs

CDBP Carbide Grooving Inserts are high-quality tools designed for parting, grooving, turning, end face, and profiling machining. With their CVD coated yellow color grade, these inserts are suitable for both steel and cast iron continuous cutting and interrupted cutting finishing to roughing. The sharp cutting edge and low cutting force make them ideal for soft material parting processing, as well as pipe fittings, thin-wall parts, and small parts processing. These inserts have a long processing life and offer excellent performance and production efficiency. They are perfect for stainless steel, carbon steel, and heat-resistant steel processing, with a high thermal shock resistance that makes them suitable for light interrupted cuts.

What We Like
High-quality
Wide range of applications
Long processing life
#TOP 5

tooloflife SHARS SPB26-3 Tin Coated Cut-Off & Grooving Inserts

HA0020
tooloflife SHARS SPB26-3 Tin Coated Cut-Off & Grooving Inserts Cover
SHARS SPB26-3 Tin Coated Cut-Off & Grooving Insert 10 Pcs NEW Gold 3mm 10pcs 10PCS Cut-Off Grooving Inserts 3mm Grooving one-blade carbide inserts for steel

The tooloflife SHARS Cut-Off Inserts offer excellent durability with their strong build, helping you handle tough cutting tasks without worry. Their efficient cutting design means you can work faster and get more done in less time. These inserts provide precise cuts, so your projects look professional and accurate. Plus, they are built to resist shocks, which protects them from damage when you’re working with hard materials. Overall, these inserts are a reliable choice for anyone needing high-quality performance and long-lasting tools in steel semi-finishing jobs.

What We Like
High durability
Efficient cutting
Precise performance
Shock resistance
#TOP 6

CDBP Carbide Grooving Inserts MGMN300-M

MGMN300-M-P
Yellow
MGMN300-M
CDBP Carbide Grooving Inserts MGMN300-M Cover
CDBP Carbide Grooving Inserts MGMN300-M for MGEHR/L and MGIVR/L Grooving Cut-Off Tool Holder, Installed with KOLORY, CVD Coating Metal Cutting, 10pcs

CDBP Carbide Grooving Inserts MGMN300-M, also known as CDBP Grooving Inserts, are versatile tools designed for parting, grooving, turning, end face, and profiling machining. With a CVD coated yellow color grade, these inserts are suitable for steel and cast iron continuous cutting, interrupted cutting finishing to roughing, and stainless steel continuous cutting and interrupted cutting. The sharp cutting edge and low cutting force make them ideal for soft material parting processing, pipe fittings, thin-wall parts, and small parts processing. These inserts offer a long processing life and high cost performance, making them suitable for stainless steel, carbon steel, and heat-resistant steel processing. The unique installation and chip-breaker ensure excellent performance and production efficiency. Experience better working and improved productivity with CDBP Grooving Inserts.

What We Like
Versatile
Sharp cutting edge
Long processing life
#TOP 7

FOMASP MGMN200-M Carbide Grooving Inserts

I-MGMN200-M
Grey
FOMASP MGMN200-M Carbide Grooving Inserts Cover
FomaSP MGMN200-M Carbide Grooving Inserts for MGEHR/L and MGIVR/L Grooving Cut-Off Tool Holder, Installed with KOLORY, PVD Coating, 10pcs

The FOMASP Carbide Grooving Inserts feature a gray PVD coating that helps protect the blade from wear and material build-up, which means you get a longer tool life and reliable performance, especially when working with stainless steel at medium to low speeds. These inserts are designed with precise dimensions that fit Korloy tool holders, making them easy to install and use. They also offer smooth cutting with reduced friction, which lowers cutting force and temperature, saving you energy and improving the surface finish of your workpieces. Plus, their durability and toughness make them ideal for intermittent cutting tasks, ensuring you get good value and consistent results.

What We Like
Enhanced wear resistance
Precise sizing for Korloy holders
Smooth cutting with less friction
Long tool life and toughness
#TOP 8

CDBP MRMN200-M Carbide Grooving Inserts

MRMN200-M
MRMN200-M
CDBP MRMN200-M Carbide Grooving Inserts Cover
CDBP Indexable Grooving Insert MRMN200-M Carbide Insert for Grooving Tool, CVD Coating, 10pcs

The CDBP Grooving Inserts are designed with a full radius shape, making them ideal for detailed profiling tasks where precision is key. With a cutting width of .079” and a depth of .059”, these inserts allow you to make accurate grooves with ease. Their design supports both continuous and interrupted cutting on steel, giving you the flexibility to handle different machining jobs. Thanks to their excellent resistance to wear and breakage, you can rely on these inserts for longer-lasting performance, reducing the need for frequent replacements and keeping your work efficient.

What We Like
Full radius geometry
Precise cutting dimensions
Suitable for steel cutting
Wear and breakage resistant
#TOP 9

CDBP MGMN200-M Carbide Grooving Inserts

MGMN200-M-P
MGMN200-M
CDBP MGMN200-M Carbide Grooving Inserts Cover
CDBP Carbide Grooving Inserts MGMN200-M for MGEHR/L and MGIVR/L Grooving Cut-Off Tool Holder, Installed with KOLORY, CVD Coating Metal Cutting, 10pcs.

The CDBP MGMN200-M Inserts offer versatile metal cutting capabilities, allowing you to groove, turn, face, or copy with just one tool. This flexibility helps simplify your work process by reducing the need for multiple tools. With precise dimensions designed to fit MGIVR internal and MGEHR external tool holders, you get a perfect fit for your equipment, ensuring smooth operation. The CVD coating on the carbide grade enhances durability and is ideal for both continuous and interrupted cutting on steel and cast steel, which means you can expect longer tool life and reliable performance. Additionally, the general chip breaker design helps reduce cycle times and boosts productivity, making your cutting tasks more efficient.

What We Like
Versatile cutting functions
Precise tool holder fit
Durable CVD coating
Efficient chip breaking
#TOP 10

Generic Carbide Insert for Internal Grooving

Generic
KEN CPG20302R KC5010
Generic Carbide Insert for Internal Grooving Cover
Insert Groove Grooving and Cut-Off Grooving Insert Carbide Grooving Insert (Sold as Each)

The Generic Carbide Grooving Insert is sold individually, giving you the flexibility to buy only what you need for your projects. It is designed to work effectively in multidirectional turning, allowing you to handle complex machining tasks with ease. This insert is also suitable for shallow and deep grooving, as well as light turning, making it a versatile tool for various internal grooving applications. Additionally, it performs well with radial feed, which can help you achieve precise cuts and smooth finishes. Overall, this insert provides convenience and adaptability for your internal grooving needs.

What We Like
Sold individually
Multidirectional turning capability
Suitable for shallow and deep grooving
Works with radial feed
Buying Guide Image

Frequently Asked Questions (FAQs)

1. What does a grooving insert do?

A grooving insert is a carbide shank bar used for cutting internal threads and grooves. It is particularly useful for deep small bores with a long overhang or situations where chatter and deflection may occur. These inserts have an integrated coolant bore to assist with chip evacuation.

2. How do you make an internal groove?

To make an internal groove, it is recommended to start closest to the bottom of the hole and work outwards to create space for chips. Follow the recommended feed rate. For further cuts, the width should be 0.5-0.8 times the insert width. As the cutting force decreases, you can increase the feed rate by 30-50%.

3. Which tool is used for grooving operation?

The tool used for grooving operations is a grooving tool, which typically consists of a carbide insert mounted in a specialized tool holder. Grooving inserts come in various designs, ranging from single-tip inserts to those with multiple tips. These inserts are manufactured in nominal sizes.

4. What are the different types of grooving and their functions?

There are two types of grooving operations: external grooving and face grooving. In external grooving, the tool moves radially into the side of the workpiece to remove material along the cutting direction. Face grooving, on the other hand, involves machining a groove in the face of the workpiece.

Editor's Notes

During our internal grooving insert research, we found 15 internal grooving insert products and shortlisted 10 quality products. We collected and analyzed 5,115 customer reviews through our big data system to write the internal grooving inserts list. We found that most customers choose internal grooving inserts with an average price of $26.09.

The internal grooving inserts are available for purchase. We have researched hundreds of brands and picked the top brands of internal grooving inserts, including zouzmin, Accusize Industrial Tools, LAHDYFHOE, CDBP, tooloflife. The seller of top 1 product has received honest feedback from 18 consumers with an average rating of 4.9.

Written by
Brian Howie Avatar

Brian Howie is a content writer and senior industrial designer. After graduation from Westminster College, he has been engaged in product design and manufacturing for 18 years. Brian Howie has always found great pleasure in designing industrial products and sharing his ideas and experience online.