Mastercool 70048 — Set of 5 Swaging Punches

Professional set of 5 individual swaging punches for expanding copper tubing. Includes 1/4", 5/16", 3/8", 1/2", and 5/8" O.D. sizes. Heat-treated steel construction for durability and long service life. Each punch is a dedicated tool for its specific size, ensuring precise, consistent swages. Essential tools for refrigeration line installation and repair work.

Key Features:

• 5 Individual Punches – Dedicated tool for each size
• Sizes Included – 1/4", 5/16", 3/8", 1/2", 5/8" O.D.
• Heat-Treated Steel – Durable, long-lasting construction
• Precise Swaging – Consistent, professional results
• Copper Tubing – Designed for refrigeration line work
• Professional Quality – Built for daily HVAC/R use
• Individual Tools – Each size optimised for best performance

Specifications:

• Model: 70048
• Type: Set of 5 swaging punches
• Sizes: 1/4", 5/16", 3/8", 1/2", 5/8" O.D.
• Material: Heat-treated steel
• Application: Copper tubing expansion
• Weight: 10 kg (shipping weight)
• SKU: 70048
• HS Code: 84189910

Set Includes:

• 1/4" O.D. swaging punch
• 5/16" O.D. swaging punch
• 3/8" O.D. swaging punch
• 1/2" O.D. swaging punch
• 5/8" O.D. swaging punch

Related Swaging Tools:

• 70040 — All-In-One Swaging Punch (1/4" to 5/8")

Related Tube Working Tools:

• 70091 — 45° Flaring & Cutting Tool Set
• 70085 — Inner-Outer Reamer for Tubing (3/16" to 1 1/2" O.D.)

Applications:

• Copper tubing expansion for refrigeration lines
• Creating slip-fit connections
• Line set installations
• Air conditioning system repairs
• Refrigeration system service
• HVAC/R professional work
• Eliminating couplings and fittings

What is Swaging?

Swaging is the process of expanding the end of a copper tube to allow another tube of the same size to slip inside, creating a connection without the need for couplings or fittings. The swaged connection is then brazed to create a permanent, leak-free joint. Swaging is essential for professional refrigeration line work, allowing clean, efficient connections that maintain proper refrigerant flow.

Why Use Individual Swaging Punches?

Individual swaging punches (like the 70048 set) provide dedicated tools for each tube size, ensuring optimal performance and precision. Unlike all-in-one tools that compromise on one or more sizes, individual punches are specifically designed for their size, creating consistent, professional swages every time. The heat-treated steel construction ensures long service life even with daily professional use.

Heat-Treated Steel Construction:

• Durability – Withstands repeated hammering without deformation
• Long Service Life – Heat treatment extends tool life significantly
• Consistent Performance – Maintains precise dimensions over time
• Professional Quality – Built for daily commercial use

Benefits:

• 5 Dedicated Punches – Individual tool for each size ensures precision
• Heat-Treated Steel – Durable, long-lasting construction
• Professional Results – Consistent, precise swages
• Complete Set – Covers common refrigeration tube sizes
• No Couplings Needed – Create slip-fit connections directly
• Cleaner Installations – Fewer fittings, better appearance
• Cost-Effective – Eliminates need for couplings and fittings

How to Use:

1. Cut copper tubing to length and deburr
2. Select appropriate swaging punch for tube size
3. Insert punch into end of copper tube
4. Strike punch firmly with hammer
5. Rotate punch slightly and strike again
6. Continue rotating and striking until fully swaged
7. Remove punch and inspect swaged end
8. Insert mating tube and braze connection

Creating Professional Swages:

• Clean Cuts – Use sharp tube cutter for square cuts
• Deburr Thoroughly – Remove all burrs inside and outside
• Firm Strikes – Use solid, consistent hammer blows
• Rotate Punch – Rotate between strikes for even expansion
• Check Depth – Ensure swage is deep enough for proper connection
• Inspect Swage – Check for cracks, splits, or irregularities

Common Swage Problems & Solutions:

• Cracked Swage – Tube wall too thin, struck too hard, or punch damaged
• Uneven Swage – Punch not rotated between strikes
• Shallow Swage – Not struck enough times or strikes too light
• Loose Fit – Swage not expanded enough, strike more firmly

Individual Punches vs All-In-One:

Individual Punches (70048):

• Dedicated tool for each size
• Optimal performance for every size
• More durable (heat-treated steel)
• Professional choice for daily use
• Requires more storage space

All-In-One Punch (70040):

• One tool for all sizes
• More compact and portable
• Good for occasional use
• May compromise on some sizes
• Convenient for mobile service

Maintenance:

• Keep punches clean and free from debris
• Store in dry location to prevent rust
• Inspect punches regularly for wear or damage
• Replace if punch becomes damaged or deformed
• Light oil coating prevents rust during storage

Professional Quality: Mastercool swaging punches are built to professional standards with heat-treated steel construction for durable, precise copper tubing expansion in demanding HVAC/R service environments. Essential tools for professional refrigeration line installation and repair.