Best Parting Inserts For Plastic: Smooth Cuts Made Easy

Are you looking for the best parting inserts for plastic to get clean and accurate cuts?
I provide a simple, engaging overview that helps you choose the right inserts for smooth and efficient results.

Parting inserts for plastic are essential tools for achieving clean, precise cuts in various materials. Whether you’re working with plastics, composites, or non-ferrous alloys, the right insert can make all the difference. These tools are designed to handle tough cutting conditions, reduce material waste, and ensure smooth, efficient results.

Choosing the best parting insert can save you time and money. It’s about finding the perfect fit for your project. With the right tool, you’ll get professional results every time. Let’s explore the top options to help you make the best choice.

List of Top 10 Parting Inserts For Plastic

Image 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 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 anyone cutting plastics, composites, or working in tough conditions. It’s ideal for low RPM cutting and handles precious metals, thin tubing, or small parts with ease.

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

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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

This is perfect for machinists and fabricators who need clean, safe cuts on small parts, thin tubes, and soft materials. It’s also great for anyone who wants tight control, low waste, and smooth work at slow speeds.

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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

This is perfect for makers who need clean cuts, low waste, and steady control when working with tough plastics or thin parts. It’s great for anyone who wants smooth parting even at low speeds.

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

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

This THINBIT 3 Pack LGPT045D5R 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.

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

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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

This is perfect for makers who need clean cuts, low waste, and steady control when working with small parts or soft materials. It’s great for anyone who wants smooth parting without stress.

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THINBIT 3 Pack LGPT085HSE 'L' Series, TiAlN Coated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting THINBIT 3 Pack LGPT085HSE ‘L’ Series, TiAlN Coated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

This product is perfect for machinists and fabricators who need clean, tight cuts on small or delicate parts. It also suits anyone working with plastics, composites, or tough low‑speed jobs.

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THINBIT 3 Pack LGPT025HS 'L' Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting THINBIT 3 Pack LGPT025HS ‘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.

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Detailed Reviews

This guide brings you the best parting inserts for plastic in a clear and simple way. Each pick is chosen with care so you can trust the quality and performance. You’ll see what makes each insert stand out and why it may be the right choice for your work. Read on and feel confident you’re getting the perfect guide to help you decide.

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

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, ensuring durability and precision.

Use it for parting solid stock up to .400″ or tubing with walls up to .200″. Works with Large series toolholders and cuts flush to the collet face. Narrow widths reduce waste and part deflection.

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 with large series toolholders for RH or LH setups.
  • 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 ideal for low RPM cutting and handles precious metals, thin tubing, or small parts with ease.

Ready to Purchase?

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

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 precise cuts without interruptions, reducing material loss and part deflection.

Use it for 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 or shoulder.

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, aluminum, and plastic.
  • Compatible with large toolholders for versatile use.
  • Not for ferrous metals or materials with interrupted cuts.
  • Requires specific toolholders, limiting versatility in setups.
  • Uncoated carbide may wear faster in tough 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?

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. It’s perfect for cutting plastics, composites, and tough materials. Use it in low RPM cutting conditions.

This insert works with Large series toolholders. It fits RH straight or LH 90-degree holders. Check the Downloads section for detailed product info.

Its narrow widths reduce material loss and part deflection. It’s ideal for precious metals, thin tubing, and small parts. Cuts flush to the collet face or shoulder.

Pros Cons
  • Minimizes material loss with narrow widths for efficient cutting.
  • Perfect for precious metals and thin-walled parts.
  • Handles abusive cutting and low RPM with uncoated HSS.
  • Flush cutting on main or sub-spindle for precise results.
  • Needs large toolholder to work
  • Not ideal for high-speed jobs
  • Can wear fast in tough cuts

Perfect For:

This is perfect for machinists and fabricators who need clean, safe cuts on small parts, thin tubes, and soft materials. It’s also great for anyone who wants tight control, low waste, and smooth work at slow speeds.

Ready to Purchase?

4. 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 is a high-speed steel parting insert. It’s perfect for cutting plastics, composites, and tough materials. Use it in low RPM cutting conditions.

Its narrow widths reduce waste and part movement. 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 it with RH straight or LH 90-degree holders. Handles solid stock up to 1.000″ and tubing walls up to .500″.

Pros Cons
  • Cuts clean with low force
  • Saves material with narrow width
  • Works well on soft and tough parts
  • Great for slow-speed jobs
  • Fits large series holders with ease
  • Needs a Large series holder
  • Not ideal for very thick walls
  • Uncoated, so wear may rise in tough jobs

Perfect For:

This is perfect for makers who need clean cuts, low waste, and steady control when working with tough plastics or thin parts. It’s great for anyone who wants smooth parting even at low speeds.

Ready to Purchase?

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

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 works best for solid stock and tubing without interrupted cuts. Narrow widths reduce material loss and part deflection.

This insert is uncoated with DURA-MAX 5000 carbide, making it durable and reliable. It’s perfect for precious metals, thin wall tubing, and small parts. Use it with Large series toolholders for smooth cuts.

Check the Downloads section for detailed product info and compatible toolholders. It cuts flush to the collet face or shoulder, ensuring precision every time. Maximize efficiency with this high-quality insert.

Pros Cons
  • Cuts clean with low waste
  • Strong grip for smooth parting
  • Great for soft metals and plastic
  • Holds shape under steady use
  • Fits large toolholders with ease
  • 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:

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.

Ready to Purchase?

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

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 best with materials that don’t have interrupted cuts. This insert is uncoated and made from DURA-MAX 5000 carbide.

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

Use it for parting solid stock up to 1.000″ or tubing with walls up to .500″. Pair it with Large series toolholders, either RH straight or LH 90 degree. Check the Downloads section for detailed info.

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 solid stock up to 1.000″ and tubing up to .500″.
  • Uncoated carbide ensures durability 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 3 Pack LGPT045D5R 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?

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

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 insert gives you clean, smooth cuts. It works fast and stays sharp. It keeps your work steady and safe.

Its narrow width helps you save material. It also lowers part bend and shake. It cuts close to the collet face with ease.

This insert handles non‑ferrous alloys with no trouble. It fits Large series toolholders.

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.
  • Compatible with large toolholders for versatile use.
  • Not for hard metals or interrupted cuts.
  • Requires specific toolholders for proper use.
  • Limited to non-ferrous materials only.

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?

8. 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 parting insert designed for precision cutting. It’s made of uncoated high-speed steel, perfect for plastics, composites, and tough cutting conditions.

Narrow widths reduce material loss and part deflection. It’s ideal for precious metals, thin tubing, and small parts. Cuts flush to the collet face or shoulder with ease.

Use it for parting solid stock up to 1.000″ or tubing walls up to .500″. Works with Large series toolholders and RH straight or LH 90-degree holders.

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 with large series toolholders for various applications.
  • No coating means less durability in tough cutting jobs.
  • Limited to low RPM, not ideal for high-speed work.
  • Specific toolholders needed, adds extra setup steps.

Perfect For:

This is perfect for makers who need clean cuts, low waste, and steady control when working with small parts or soft materials. It’s great for anyone who wants smooth parting without stress.

Ready to Purchase?

9. THINBIT 3 Pack LGPT085HSE ‘L’ Series, TiAlN Coated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

THINBIT 3 Pack LGPT085HSE 'L' Series, TiAlN Coated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

The THINBIT 3 Pack LGPT085HSE is a high-speed steel parting insert. It’s TiAlN coated for tough cutting jobs. Use it for plastics, composites, and low RPM cutting.

Its narrow widths reduce material loss and part deflection. It’s perfect for thin materials like tubing and small parts.

Works with solid stock up to 1.000″ and tubing walls up to .500″. Use it with large series toolholders for straight or 90-degree cuts.

Pros Cons
  • Cuts clean with low heat and high control
  • Saves material thanks to its slim, smart design
  • Works strong even in tough, slow-cut jobs
  • Handles plastics and composites with smooth ease
  • Fits large series toolholders with no fuss
  • Limited to specific toolholders, not universal.
  • Not ideal for high RPM cutting conditions.
  • Narrow widths may not suit all material types.

Perfect For:

This product is perfect for machinists and fabricators who need clean, tight cuts on small or delicate parts. It also suits anyone working with plastics, composites, or tough low‑speed jobs.

Ready to Purchase?

10. THINBIT 3 Pack LGPT025HS ‘L’ Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

THINBIT 3 Pack LGPT025HS 'L' Series, Uncoated High Speed Steel, Parting Insert for Plastics, Composites, Abusive Cutting Conditions and Low RPM Cutting

The THINBIT 3 Pack LGPT025HS insert gives you clean cuts with simple ease. It works fast. It stays steady.

It has a narrow width that saves material. It also cuts close to the collet face.

This high speed steel insert handles plastics and tough cuts. It works well at low RPM. It fits Large series toolholders.

Pros Cons
  • Minimizes material loss with narrow widths, perfect for precious metals.
  • Cuts close to collet face or shoulder, ideal for small parts.
  • Handles tough jobs in plastics, composites, and abusive conditions.
  • Versatile use with any straight or 90-degree toolholder.
  • Not ideal for high-speed jobs
  • Needs Large series toolholders
  • Best only for small parting tasks

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.

Ready to Purchase?

Buying Guide

Parting inserts for plastic make clean, precise cuts in materials like plastics, composites, and non-ferrous alloys. Choosing the right one saves time and money. Let’s explore the best options and factors to consider.

Factors to Consider When Buying Parting Inserts for Plastic:
– Material Compatibility: Ensure the insert works with your material, like plastics, composites, or non-ferrous alloys.
– Cutting Conditions: Choose inserts for tough conditions, low RPM, or smooth cuts without interruptions.
– Width and Size: Narrow widths reduce waste and part deflection, ideal for small parts and thin tubing.
– Coating: Coated inserts like TiAlN offer extra durability for tough jobs, while uncoated options work well for specific materials.
– Toolholder Compatibility: Check if the insert fits your toolholder, like Large series or RH/LH holders.
– Cut Depth: Match the insert’s capacity to your material thickness for solid stock or tubing walls.
– Precision Needs: Look for inserts that cut flush to the collet face or shoulder for clean results.
– Durability: High-speed steel or carbide inserts handle abusive conditions and last longer.

Engaging Experience:
With the right parting insert, you’ll achieve professional results every time. Whether you’re working on small parts or tough materials, these tools ensure smooth, efficient cuts with minimal waste. Explore the options above to find the perfect fit for your project.