Selecting HSS Chipless Cutting Blades for Copper Tubes in HVAC & Heat Exchanger Coils

Technical Guide： Selecting HSS Chipless Cutting Blades for Copper Tubes in HVAC and Heat Exchanger Coils

Introduction
In HVAC and heat exchanger manufacturing, chipless cutting of copper tubes is essential to prevent metal chips from contaminating refrigeration systems. High-Speed Steel HSS chipless cutting blades provide clean burr-free cuts while maintaining efficiency.

This guide explains key specifications including outer diameter OD inner diameter ID thickness and blade angle to help you select the optimal blade for your application. For a full product range visit Machine Die Spare Parts at Machine Die Spare Parts.

Key Specifications of Chipless Cutting Blades
Chipless cutting blades come in various dimensions and angles each suited for different tube sizes and cutting conditions. Below are common specifications

Blade Model OD mm ID mm Thickness mm Blade Angle
OD32.2xID15x10.2x18 32.2 15 10.2 18
OD25xID15x10.2x16 25 15 10.2 16
OD25.4xID10x8x20 25.4 10 8 20
OD32xID12x8x20 32 12 8 20
OD31xID12x8x20 31 12 8 20
OD31.5xID12x8x20 31.5 12 8 20

Outer Diameter OD and Inner Diameter ID
The OD must match the cutting machines blade holder for secure mounting
The ID must fit the arbor spindle of the cutting machine
Example A 32.2 mm OD 15 mm ID blade fits machines with a 15 mm spindle

Blade Thickness
Thicker blades eg 10.2 mm provide more rigidity for heavy-duty cutting
Thinner blades eg 8 mm reduce material waste but may deform under high pressure

Blade Angle Shear Angle
16 to 20 is common for copper tube cutting
A smaller angle eg 16 provides a sharper cut but may wear faster
A larger angle eg 20 increases durability but requires more cutting force

How to Choose the Right Blade for Your Application

Match the Blade to the Tube Size
For small tubes 25 mm or less use OD25 to OD25.4 blades
For medium tubes 25 to 32 mm use OD31 to OD32.2 blades

Consider Cutting Speed and Feed Rate
Higher blade angles 20 work better for fast cutting
Lower angles 16 to 18 are better for precision cuts

Blade Material and Coating
HSS High-Speed Steel offers good durability for moderate use
Carbide-tipped blades last longer in high-volume production
Titanium Nitride TiN coating reduces friction and extends blade life

Machine Compatibility
Ensure the ID fits your machines spindle
Check if the OD matches the blade holder

Recommended Blades for Common HVAC Applications

Application Recommended Blade Model Key Features
Small Copper Tubes 25 mm or less OD25xID15x10.2x16 Sharp cut minimal burr
Medium Tubes 25 to 32 mm OD32xID12x8x20 Balanced durability and precision
High-Speed Cutting OD31.5xID12x8x20 Optimized for fast feed rates

Where to Buy
For a complete selection of HSS chipless cutting blades visit Machine Die Spare Parts at 

Machine Die Spare Parts – Chipless Cutting Blades

Conclusion
Choosing the right chipless cutting blade ensures clean burr-free cuts in copper tubes improving HVAC and heat exchanger performance. Key factors include
Blade dimensions OD ID thickness
Shear angle 16 to 20
Material HSS carbide coated
Machine compatibility

For best results always verify blade specifications with your tube size and cutting machine requirements.

Need a custom blade Contact Machine Die Spare Parts at Machine Die Spare Parts for specialized solutions.