Best Inserts For Plastic Parting

Looking for the best inserts for plastic parting? Our guide offers a curated list of top-performing inserts designed for clean, efficient cuts and minimal material waste, ensuring a smoother and more reliable experience for your precision tasks.

Plastic parting is a precision task that demands the right tools. Whether you’re working with non-ferrous alloys, aluminum, or plastics, choosing the best inserts can make all the difference. Our guide highlights top-performing inserts designed for clean, efficient cuts and minimal material waste.

These inserts are easy to use, durable, and perfect for small parts. They reduce deflection and save time, making your work smoother and more reliable.

List of Top 10 Inserts For Plastic Parting

Title	Best For	Price
THINBIT 3 Pack LGPT062D5R ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts	This THINBIT 3 Pack LGPT062D5R is perfect for machinists working with non-ferrous alloys, aluminium, and plastic. It’s ideal for cutting thin materials like precious metals, tubing, and small parts without wasting material.	View on Amazon (paid link)
THINBIT 3 Pack LGPT025HSR ‘L’ Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting	This THINBIT parting insert is perfect for cutting plastics, composites, and materials under tough conditions. It’s also great for low RPM cutting and works well with precious metals, thin tubing, and small parts.	View on Amazon (paid link)
THINBIT 3 Pack LGPT025D5R ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts	This THINBIT parting insert is perfect for machinists working with non-ferrous alloys, aluminium, and plastic. It’s ideal for cutting thin materials like precious metals, tubing, and small parts without wasting material.	View on Amazon (paid link)
THINBIT 3 Pack LGPT062HSR ‘L’ Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting	This THINBIT parting insert is perfect for anyone working with plastics, composites, or cutting at low RPMs. It’s ideal for precious metals, thin tubing, and small parts, helping you save material and avoid part deflection.	View on Amazon (paid link)
THINBIT 3 Pack LGPT045D5 ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts	This THINBIT 3 Pack LGPT045D5 is perfect for anyone working with non-ferrous alloys, aluminium, or plastic. It’s ideal for cutting thin materials like precious metals, tubing, or small parts without wasting material.	View on Amazon (paid link)
THINBIT 3 Pack LGPT045D5R ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts	This THINBIT parting insert is perfect for machinists working with non-ferrous alloys, aluminium, and plastic. It’s ideal for cutting thin materials like precious metals, tubing, and small parts without wasting material.	View on Amazon (paid link)
3 Pack SPT045D5 THINBIT LITTLEBIT ‘S’ Series Parting Insert, Uncoated Carbide for Non-Ferrous alloys, Aluminium, Plastic no Interrupted cuts	This set is perfect for makers who need clean, thin, and accurate cuts in soft metals and plastic. It suits anyone who works with small parts and wants to reduce waste and deflection.	View on Amazon (paid link)
THINBIT 3 Pack LGPT085HSR7R ‘L’ Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting	This THINBIT parting insert is perfect for machinists working with plastics, composites, or tough cutting conditions. It’s also great for low RPM cutting and narrow cuts on precious metals, thin tubing, or small parts.	View on Amazon (paid link)
THINBIT 3 Pack LGPT062D5R7R ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts	This THINBIT parting insert is perfect for machinists working with non-ferrous alloys, aluminium, and plastic. It’s ideal for cutting thin materials like precious metals, tubing, and small parts without wasting material.	View on Amazon (paid link)
THINBIT 3 Pack LGPT045HSR ‘L’ Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting	This THINBIT parting insert is perfect for anyone cutting plastics, composites, or working in tough conditions. It’s also great for low RPM cutting and narrow, precise cuts on materials like precious metals or thin tubing.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 inserts for plastic parting, carefully selected for performance and value. Each product is reviewed to help you find the perfect fit for your needs. Whether you’re cutting plastics, composites, or tough materials, this guide ensures you make the best choice with confidence.

1. THINBIT 3 Pack LGPT062D5R ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts

The THINBIT 3 Pack LGPT062D5R is a parting insert designed for non-ferrous alloys, aluminium, and plastic. It works best with Large series toolholders and is ideal for smooth, uninterrupted cuts. Check the Downloads section for detailed product info.

Its narrow widths reduce material loss and part deflection, making it perfect for precious metals and thin-walled tubing. It cuts flush to the collet face or shoulder on the main spindle side using M03 or sub-spindle side using M04. Use it for solid stock up to 1.000″ or tubing with walls up to .500″.

The uncoated DURA-MAX 5000 carbide ensures durability and precision. Pair it with RH straight or LH 90-degree toolholders for optimal performance. This insert is a reliable choice for clean, efficient parting.

Pros	Cons
Minimizes material loss with narrow widths for efficient cutting. Perfect for precious metals and thin-walled parts. Cuts flush to collet face or shoulder for precision. Uncoated carbide handles non-ferrous alloys, aluminum, and plastic smoothly.	Not for ferrous metals or materials with interrupted cuts. Requires specific toolholders, limiting compatibility with other systems. Uncoated carbide may wear faster in certain applications.

Perfect For:

This THINBIT 3 Pack LGPT062D5R is perfect for machinists working with non-ferrous alloys, aluminium, and plastic. It’s ideal for cutting thin materials like precious metals, tubing, and small parts without wasting material.

Ready to Purchase?

View Price on Amazon (paid link)

2. THINBIT 3 Pack LGPT025HSR ‘L’ Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

THINBIT 3 Pack LGPT025HSR 'L' Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

The THINBIT 3 Pack LGPT025HSR is a high-speed steel parting insert designed for cutting plastics, composites, and tough materials. It’s perfect for low RPM cutting and abusive conditions.

This insert works with Large series toolholders and is ideal for parting solid stock up to .400″ or tubing with walls up to .200″. Its narrow width reduces waste and part deflection, making it great for precious metals and small parts.

Cuts flush to the collet face or shoulder. Use M03 for the main spindle or M04 for the sub-spindle. See downloads for details.

Pros	Cons
Minimizes material loss with narrow widths for efficient cutting. Cuts flush to collet face or shoulder for precision. Handles tough jobs in plastics, composites, and abusive conditions. Versatile use with large series toolholders for flexibility.	Limited to specific toolholders and materials. Uncoated steel may wear faster under tough conditions. Not ideal for high RPM cutting applications.

Perfect For:

This THINBIT parting insert is perfect for cutting plastics, composites, and materials under tough conditions. It’s also great for low RPM cutting and works well with precious metals, thin tubing, and small parts.

Ready to Purchase?

View Price on Amazon (paid link)

3. THINBIT 3 Pack LGPT025D5R ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts

The THINBIT 3 Pack LGPT025D5R is a parting insert designed for non-ferrous alloys, aluminium, and plastic. It’s perfect for clean, uninterrupted cuts without material loss. Use it with Large series toolholders for best results.

Narrow widths reduce waste and part deflection. Works great for precious metals, thin tubing, and small parts. Cuts flush to the collet face or shoulder easily.

This uncoated carbide insert handles solid stock up to .400″ and tubing walls up to .200″. It’s durable and efficient, making it a reliable choice for your cutting needs.

Pros	Cons
Minimizes material loss with narrow widths for efficient cutting. Perfect for precious metals and thin-walled parts. Cuts flush to collet face or shoulder for precision. Durable uncoated carbide for non-ferrous alloys and plastic.	Not for ferrous metals or materials with interrupted cuts. Requires specific toolholders, limiting compatibility with other systems. Uncoated carbide may wear faster in certain applications.

Perfect For:

This THINBIT parting insert is perfect for machinists working with non-ferrous alloys, aluminium, and plastic. It’s ideal for cutting thin materials like precious metals, tubing, and small parts without wasting material.

Ready to Purchase?

View Price on Amazon (paid link)

4. THINBIT 3 Pack LGPT062HSR ‘L’ Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

THINBIT 3 Pack LGPT062HSR 'L' Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

The THINBIT 3 Pack LGPT062HSR is a high-speed steel parting insert designed for cutting plastics, composites, and tough materials. It works well in low RPM cutting and abusive conditions, making it a reliable choice for precision tasks.

Use it with large series toolholders for parting solid stock up to 1.000″ or tubing with walls up to .500″. Its narrow width reduces waste and part deflection, perfect for precious metals and small parts.

Pros	Cons
Minimizes material loss with narrow widths for efficient cutting. Cuts flush to collet face or shoulder for precise results. Handles tough jobs in plastics, composites, and abusive conditions. Versatile use for solid stock, tubing, and small parts.	Not for high RPM cutting, limiting speed in some applications. Uncoated steel may wear faster in tough cutting conditions. Specific toolholders required, adding setup complexity.

Perfect For:

This THINBIT parting insert is perfect for anyone working with plastics, composites, or cutting at low RPMs. It’s ideal for precious metals, thin tubing, and small parts, helping you save material and avoid part deflection.

Ready to Purchase?

View Price on Amazon (paid link)

5. THINBIT 3 Pack LGPT045D5 ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts

The THINBIT 3 Pack LGPT045D5 is a parting insert designed for non-ferrous alloys, aluminium, and plastic. It works best for solid stock up to 1.000″ and tubing with walls up to .500″. Narrow widths reduce waste and part bending.

This insert is uncoated and made from DURA-MAX 5000 carbide. It’s perfect for precious metals, thin wall tubing, and small parts. Cuts can be made within .062″ of the collet face or shoulder.

Use it with Large series toolholders or any straight/90-degree holder. Check the Downloads section for detailed product info and compatible tools.

Pros	Cons
Minimizes material loss with narrow widths for efficient cutting. Perfect for precious metals and thin-walled parts. Cuts close to collet face or shoulder for precision. Uncoated carbide handles non-ferrous alloys and plastic smoothly. Compatible with large toolholders for versatile use.	Not made for hard or rough cuts Needs Large toolholders to work Best only on soft materials

Perfect For:

This THINBIT 3 Pack LGPT045D5 is perfect for anyone working with non-ferrous alloys, aluminium, or plastic. It’s ideal for cutting thin materials like precious metals, tubing, or small parts without wasting material.

Ready to Purchase?

View Price on Amazon (paid link)

6. THINBIT 3 Pack LGPT045D5R ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts

The THINBIT 3 Pack LGPT045D5R is a specialized cutting tool designed for precision parting operations. It’s perfect for working with non-ferrous alloys, aluminum, and plastic.

This uncoated carbide insert features narrow widths, reducing material waste and part deflection. It’s ideal for precious metals, thin tubing, and small parts.

Cuts flush to the collet face or shoulder. Works with large series toolholders. Use for solid stock up to 1.000″ or tubing walls up to .500″.

Pros	Cons
Minimizes material loss with narrow widths for efficient cutting. Perfect for precious metals and thin-walled parts. Cuts flush to collet face or shoulder for precision. Durable uncoated carbide handles non-ferrous alloys, aluminum, and plastic.	No coating means less wear resistance for long-term use. Limited material compatibility excludes ferrous metals and hard materials. Specific toolholders required, adding extra cost and setup time.

Perfect For:

Ready to Purchase?

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7. 3 Pack SPT045D5 THINBIT LITTLEBIT ‘S’ Series Parting Insert, Uncoated Carbide for Non-Ferrous alloys, Aluminium, Plastic no Interrupted cuts

The 3 Pack SPT045D5 THINBIT LITTLEBIT ‘S’ Series Parting Insert is perfect for non-ferrous alloys, aluminium, and plastic. It’s designed for smooth, uninterrupted cuts with uncoated DURA-MAX 5000 carbide.

Narrow widths reduce waste and work well for precious metals, thin tubing, and small parts. Use it with Small series toolholders for solid stock up to 1.000″ or tubing walls up to .500″.

Pros	Cons
Minimizes material loss with narrow widths for efficient cutting. Perfect for precious metals and thin-walled parts. Cuts close to collet face or shoulder for precision. Uncoated carbide excels in non-ferrous alloys and plastics.	Not for ferrous metals or materials needing interrupted cuts. Limited to non-ferrous alloys, aluminium, and plastic only. Requires specific toolholders for proper use.

Perfect For:

This set is perfect for makers who need clean, thin, and accurate cuts in soft metals and plastic. It suits anyone who works with small parts and wants to reduce waste and deflection.

Ready to Purchase?

View Price on Amazon (paid link)

8. THINBIT 3 Pack LGPT085HSR7R ‘L’ Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

THINBIT 3 Pack LGPT085HSR7R 'L' Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

The THINBIT 3 Pack LGPT085HSR7R insert gives clean, smooth cuts. It stays steady in tough jobs. It works well with many toolholders.

It cuts thin parts with ease. It keeps waste low.

This insert handles plastics, composites, and harsh cuts. It works at low speeds with strong control. It fits large toolholders for right or left setups.

Pros	Cons
Minimizes material loss with narrow widths for precious metals and thin parts. Cuts flush to collet face or shoulder for precise results. Handles tough jobs in abusive cutting conditions and low RPMs. Versatile use for plastics, composites, and solid stock up to 1.000″.	No coating means less durability for long-term use. Limited RPM range restricts high-speed cutting applications. Specific toolholders required, adding extra setup steps.

Perfect For:

This THINBIT parting insert is perfect for machinists working with plastics, composites, or tough cutting conditions. It’s also great for low RPM cutting and narrow cuts on precious metals, thin tubing, or small parts.

Ready to Purchase?

View Price on Amazon (paid link)

9. THINBIT 3 Pack LGPT062D5R7R ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts

The THINBIT 3 Pack LGPT062D5R7R is a parting insert designed for non-ferrous alloys, aluminium, and plastic. It works best for solid stock and tubing without interrupted cuts. This insert is uncoated and made from DURA-MAX 5000 carbide.

Its narrow widths reduce material loss and part deflection, making it ideal for precious metals, thin wall tubing, and small parts. It cuts flush to the collet face or shoulder on either the main spindle or sub-spindle.

Use it with Large series toolholders, either RH straight or LH 90-degree. It handles solid stock up to 1.000″ and tubing walls up to .500″. Check the Downloads section for detailed product info and compatible toolholders.

Pros	Cons
Minimizes material loss with narrow widths for efficient cutting. Perfect for precious metals and thin-walled parts. Cuts flush to collet face or shoulder for precision. Uncoated carbide handles non-ferrous alloys and plastics smoothly.	Not for ferrous metals or materials with interrupted cuts. Requires specific toolholders, limiting compatibility with other systems. Uncoated carbide may wear faster in certain applications.

Perfect For:

Ready to Purchase?

View Price on Amazon (paid link)

10. THINBIT 3 Pack LGPT045HSR ‘L’ Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

THINBIT 3 Pack LGPT045HSR 'L' Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

The THINBIT 3 Pack LGPT045HSR is a high-speed steel parting insert. It’s designed for tough cutting jobs. Use it for plastics, composites, and low RPM cutting.

It works well with precious metals, thin tubing, and small parts. The narrow width cuts flush to the collet face. It’s perfect for reducing material loss.

This insert fits Large series toolholders. Use it for parting solid stock up to 1.000″. It’s a reliable choice for challenging cuts.

Pros	Cons
Reduces material loss with narrow widths for efficient cutting. Cuts flush to collet face or shoulder for precise results. Handles abusive conditions and low RPM cutting with ease. Perfect for plastics, composites, and precious metals.	Not for high RPM cutting, limiting speed in some applications. Uncoated steel may wear faster in tough cutting conditions. Specific toolholders required, adding extra setup steps.

Perfect For:

This THINBIT parting insert is perfect for anyone cutting plastics, composites, or working in tough conditions. It’s also great for low RPM cutting and narrow, precise cuts on materials like precious metals or thin tubing.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Plastic parting needs the right tools. The best inserts make cuts clean and efficient. This guide helps you choose top-performing inserts for your work.

Engaging Experience:
Choosing the right insert makes your work smoother and faster. You’ll save time and material, giving you reliable results every time. Let’s explore the best options for your needs.

Factors to Consider When Buying:
– Material Compatibility: Pick inserts designed for plastics, non-ferrous alloys, or aluminum. The right material ensures clean cuts and long tool life.
– Insert Width: Narrow widths reduce material waste and part deflection. They’re perfect for small parts and precious metals.
– Coating: Uncoated carbide or high-speed steel inserts offer durability and precision. Choose based on your cutting needs.
– Toolholder Compatibility: Ensure the insert works with your toolholder series (e.g., Large or Small). This guarantees optimal performance.
– Cutting Conditions: For abusive conditions or low RPM cutting, high-speed steel inserts are reliable. Carbide works best for smooth, uninterrupted cuts.
– Part Size: Check the insert’s capacity for solid stock or tubing walls. This ensures it fits your project needs.
– Ease of Use: Look for inserts that cut flush to the collet face or shoulder. This makes your work efficient and hassle-free.