Best Parting Inserts For Plastic Materials

Looking for the best parting inserts for plastic materials? We’ve compiled a list of the top 10 options to help you achieve perfect cuts with precision and efficiency.

Parting inserts are essential tools for cutting plastic materials with precision and efficiency. They help reduce waste and ensure clean, smooth cuts every time. Whether you’re working on small parts or large projects, the right insert can make all the difference.

Choosing the best parting inserts for plastic materials can save you time and money. With the right tool, you’ll achieve perfect cuts and keep your work steady. Let’s explore the top options to find the perfect fit for your needs.

List of Top 10 Parting Inserts For Plastic Materials

Title	Best For	Price
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 thin materials. It’s ideal for low RPM cutting and tough conditions, making it great for precious metals, tubing, and small parts.	View on Amazon (paid link)
THINBIT 3 Pack LGPT062D5R ‘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 speeds. It’s ideal for delicate materials like precious metals, thin tubing, or small parts, where precision and minimal waste are key.	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, 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 product is perfect for makers who need clean, precise cuts on soft metals and plastic. It’s great for anyone working with small parts, thin walls, or tight spaces who wants smooth results every time.	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)
3 Pack SPT045D5 THINBIT LITTLEBIT ‘S’ Series Parting Insert, Uncoated Carbide for Non-Ferrous alloys, Aluminium, Plastic no Interrupted cuts	This 3 Pack SPT045D5 THINBIT LITTLEBIT ‘S’ Series Parting Insert 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 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 LGPT045D5R7R ‘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 LGPT045D57L ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts	This tool is great for makers who need clean cuts, low waste, and steady work on soft metals and plastic. It fits anyone who wants tight control and smooth results on small parts.	View on Amazon (paid link)

Detailed Reviews

Discover the top 10 parting inserts for plastic materials, carefully selected for performance, durability, and value. Each product is reviewed to ensure clean cuts, minimal waste, and smooth operation. Whether you’re working with small parts or tough materials, this guide helps you find the perfect insert for your needs. Read on to make an informed choice and elevate your cutting precision.

1. 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

This THINBIT 3 Pack insert cuts clean and smooth. It keeps parts steady with less waste. It works great on small or thin pieces.

The high‑speed steel insert handles tough cuts with ease. It also works well at low speeds.

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, not universal. Uncoated HSS may wear faster in tough cuts. Not ideal for high RPM applications.

Perfect For:

This THINBIT parting insert is perfect for cutting plastics, composites, and thin materials. It’s ideal for low RPM cutting and tough conditions, making it great for precious metals, tubing, and small parts.

Ready to Purchase?

View Price on Amazon (paid link)

2. 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’s perfect for clean cuts without interruptions. Use it with Large series toolholders for best results.

This insert has narrow widths, reducing material loss and part deflection. It’s ideal for precious metals, thin wall tubing, and small parts. Cuts flush to the collet face or shoulder on either spindle side.

Uncoated DURA-MAX 5000 carbide ensures durability. Works with solid stock up to 1.000″ or tubing walls up to .500″. Use RH straight or LH 90-degree toolholders.

Pros	Cons
Minimizes material loss with narrow widths for precious metals. Cuts flush to collet face or shoulder for precision. Handles solid stock up to 1.000″ and tubing up to .500″. Uncoated carbide for non-ferrous alloys, aluminium, and plastic. Compatible with Large series toolholders for versatility.	Not for hard or rough cuts Needs large holders to work Best only on soft materials

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)

3. 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’s perfect for low RPM cutting and abusive conditions, ensuring durability and precision.

Use it for parting solid stock up to 1.000″ or tubing with walls up to .500″. Works with Large series toolholders and cuts flush to the collet face. Ideal for precious metals and small parts.

Pros	Cons
Minimizes material loss with narrow widths for efficient cutting. Perfect for thin materials like tubing and precious metals. Handles tough conditions in plastics, composites, and low RPM cutting. Versatile use with large series toolholders for precise parting.	Limited to specific toolholders, not universal. Uncoated steel may wear faster in tough conditions. Not ideal for high RPM cutting applications.

Perfect For:

This THINBIT parting insert is perfect for anyone working with plastics, composites, or cutting at low speeds. It’s ideal for delicate materials like precious metals, thin tubing, or small parts, where precision and minimal waste are key.

Ready to Purchase?

View Price on Amazon (paid link)

4. 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 high-performance parting insert designed for non-ferrous alloys, aluminium, and plastic. It’s perfect for precise cuts without interruptions.

Narrow widths reduce waste and part movement. Works with solid stock up to .400″ and tubing walls up to .200″.

Made with uncoated DURA-MAX 5000 carbide, it’s durable and reliable. Use with Large series toolholders for straight or 90-degree cuts.

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.	Limited to thin stock; thick parts need new insert. No coating; quick wear on hard alloys. Requires specific toolholders; not universal.

Perfect For:

Ready to Purchase?

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5. 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 parting insert designed for non-ferrous alloys, aluminium, and plastic. It works without interrupted cuts, making it efficient and reliable. The uncoated DURA-MAX 5000 carbide ensures durability and precision.

This insert is perfect for narrow cuts, reducing material loss and part deflection. Use it with Large series toolholders for straight or 90-degree 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. 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 product is perfect for makers who need clean, precise cuts on soft metals and plastic. It’s great for anyone working with small parts, thin walls, or tight spaces who wants smooth results every time.

Ready to Purchase?

View Price on Amazon (paid link)

6. 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″. Its narrow widths reduce waste and part bending, making it ideal for precious metals and small parts.

Use it with Large series toolholders or any straight/90-degree holder. The uncoated DURA-MAX 5000 carbide ensures smooth cuts without interruptions.

Pros	Cons
Cuts clean with less waste. Strong carbide insert for smooth work. Great for soft metals and plastic. Holds shape even on thin parts. Works with many large toolholders.	Not for ferrous metals or materials with interrupted cuts. Requires specific toolholders, limiting versatility in some setups. Uncoated carbide may wear faster in certain applications.

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)

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 a reliable tool for precision cutting. It’s uncoated carbide works best with non-ferrous alloys, aluminium, and plastic. Use it for smooth, uninterrupted cuts.

Its narrow widths reduce material loss and part deflection. It’s ideal for precious metals, thin wall tubing, and small parts. Cuts can be made within 1/16″ of the collet face or shoulder of larger diameters.

This insert is perfect for parting solid stock up to 1.000″ or tubing with walls up to .500″. Use it with Small series toolholders. Check the Downloads section for detailed product info.

Pros	Cons
Narrow widths cut close, saving material and reducing part deflection. Perfect for precious metals, thin tubing, and small parts. Uncoated carbide handles non-ferrous alloys, aluminum, and plastic smoothly. Works with Small series toolholders for easy compatibility.	Not for ferrous metals or interrupted cuts. Requires specific toolholders, limiting versatility. Uncoated carbide may wear faster in some applications.

Perfect For:

This 3 Pack SPT045D5 THINBIT LITTLEBIT ‘S’ Series Parting Insert 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)

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

This THINBIT 3 Pack insert gives you clean cuts with ease. It works fast on aluminium, plastic and other soft metals. You get smooth cuts with no breaks.

The narrow design saves material and keeps parts steady. It also works with large toolholders for simple setup.

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 versatility in some setups. Uncoated carbide may wear faster in certain applications.

Perfect For:

Ready to Purchase?

View Price on Amazon (paid link)

9. THINBIT 3 Pack LGPT045D5R7R ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts

The THINBIT 3 Pack LGPT045D5R7R is a parting insert designed for non-ferrous alloys, aluminium, and plastic. It features uncoated DURA-MAX 5000 carbide for smooth, uninterrupted cuts.

Use it with large series toolholders for parting solid stock or tubing. Narrow widths reduce material loss and part deflection, making it ideal for precious metals and small parts.

Pros	Cons
Minimizes material loss with narrow widths for precious metals and thin tubing. Cuts flush to collet face or shoulder for precise results. Handles solid stock up to 1.000″ and tubing walls up to .500″. Uncoated carbide ensures durability for non-ferrous alloys and plastics.	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 LGPT045D57L ‘L’ Series, Uncoated Carbide, Parting Insert for Non-Ferrous Alloys, Aluminium and Plastic Without Interrupted Cuts

The THINBIT 3 Pack LGPT045D57L insert gives you clean, smooth cuts with ease. It works fast and keeps your work simple.

It uses narrow widths to cut with less waste. It stays steady on thin parts. It reaches close to the collet face with no trouble.

You can part solid stock up to 1.000″. You can cut tubing with walls up to .500″. You can use it on non‑ferrous alloys, aluminium and plastic.

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 plastics smoothly.	Not for ferrous metals or materials with interrupted cuts. Requires specific toolholders, limiting versatility in some setups. Uncoated carbide may wear faster in certain applications.

Perfect For:

This tool is great for makers who need clean cuts, low waste, and steady work on soft metals and plastic. It fits anyone who wants tight control and smooth results on small parts.

Ready to Purchase?

View Price on Amazon (paid link)

Buying Guide

Parting inserts are key for cutting plastic materials with ease. They help you save time and reduce waste. Picking the right one makes your work smooth and precise.

Choosing the best parting inserts for plastic can feel tricky. But don’t worry, we’ve got you covered. Let’s dive into what makes a great insert and how to find the perfect one for your needs.

Here’s what to consider when buying:

Material Compatibility:
Pick inserts designed for plastic materials. Some work well with non-ferrous alloys or aluminium too. Match the insert to your project needs.
Cutting Precision:
Look for inserts with narrow widths. They reduce waste and keep cuts clean. Perfect for small parts and precious metals.
Durability:
Choose uncoated carbide or high-speed steel inserts. They last longer and handle tough cuts. Great for abusive cutting conditions.
Toolholder Compatibility:
Check if the insert works with your toolholder. Large series or small series holders fit different inserts. Ensure they match for smooth cuts.
Cutting Speed:
Some inserts work best at low RPMs. Others handle high speeds. Pick one that fits your machine’s speed range.
Part Size:
Consider the size of your parts. Inserts have limits for solid stock and tubing walls. Choose one that fits your project size.
Ease of Use:
Look for inserts that cut flush to the collet face. They make setup simple and cuts steady. Ideal for beginners and pros alike.

With these tips, you’ll find the best parting inserts for your plastic projects. Happy cutting!