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 |
|---|---|---|---|
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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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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 |
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. |
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

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 |
|---|---|
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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

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 |
|---|---|
|
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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

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 |
|---|---|
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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

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 |
|---|---|
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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

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 |
|---|---|
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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

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 |
|---|---|
|
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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

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 |
|---|---|
|
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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

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 |
|---|---|
|
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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

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 |
|---|---|
|
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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

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 |
|---|---|
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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.