In this guide, we’ll cover:-
✔ Types of lathe parting tools
✔ Best materials & coatings
✔ How to use them effectively
✔ Common problems & solutions
Types of Lathe Parting Tools
1. HSS (High-Speed Steel) Parting Tools
- Best for: Beginners, manual lathes, softer materials
- Pros: Affordable, easy to resharpen
- Cons: Wears faster than carbide
2. Indexable Parting Tools (Carbide)
- Best for: Production work, quick insert changes
- Pros: Saves time, consistent performance
- Cons: Higher initial cost
3. Clamp Style Parting Tools (Chipbreaker 5% Cobalt Blades)
- Best for: Minimizing material waste
- Pros: Narrow kerf, less vibration
- Cons: Less rigid, prone to breakage
How to Use a Parting Tool Effectively
✅ Secure the workpiece tightly to prevent vibration.
✅ Use proper tool height alignment (centerline of the workpiece).
✅ Apply steady, moderate feed rate, too fast can break the tool.
✅ Use cutting fluid to extend tool life (especially for metals).
✅ Avoid excessive overhang, keep the tool as close to the holder as possible.
Common Problems & Solutions
| Issue | Possible Cause | Fix |
|---|---|---|
| Tool chatter | Loose setup, incorrect speed | Tighten tool post, adjust RPM |
| Breaking inserts | Too much feed, weak rigidity | Reduce feed, use stiffer setup |
| Poor surface finish | Dull tool, wrong cutting fluid | Sharpen/replace tool, use proper coolant |
| Tool deflection | Excessive overhang | Minimise tool extension |
Final Thoughts
Choosing the right lathe parting tool depends on your material, machine type, and budget. Carbide inserts are great for CNC and heavy-duty work, while HSS is ideal for manual lathes. Proper setup and technique prevent most parting issues.
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