Mechanical Joining

Precision Metal Finishing Tools

The Superior Method For Joining Tubing To Flanges And Fittings.

Easily create secure, leak-proof joints between ductile tubular products and fittings with the Mechanical Joining Tool.

Mechanical Joining
  • Superior Joints

  • Roll To A Torque Or Diameter Spec

  • Easy To Use

  • Materials

How the Mechanical Joining Tool Works

This tool consists of a mandrel and rolls housed inside of a cage, so as the mandrel moves forward, the rolls expand and make contact with the inner wall of the tube, forcing the material to expand into a flange.

Superior Joints

• Creates secure, leak-proof joints between ductile tubular products and fittings.
• Mechanically joined joints will not leak, pull apart, or come loose due to pressure, vibrations or temperature change.
• Superior to a welded, brazed, or crimped joint.

Roll to Torque or Size

• Rolling to a torque ensures consistent results regardless of tolerance and variations of the tube OD, wall thickness, and component ID.
• Rolling to a diameter guarantees a consistent ID of the tube. This makes it possible to “iron out” and round up the ID of the tube.

Easy to Use

• Limited training required to operate.
• Used on manual electric rolling motors, pneumatic motors, special machines and in rare cases, on CNC machines.

Operation Procedure

1) 0% Expansion

The tube is inserted into the flange and the mechanical joining tool is inserted into the tube.

2) 25% Expansion

When the tube has been rolled to roughly 25% of the total expansion required, the tube will make metal-to-metal contact with the flange.

3) 50% Expansion

At this point the tube metal has begun to flow into the grooved serrations of the flange.

4) 100% Expansion

Grooved serrations are now completely filled and the tube metal has flowed to the point of least resistance beyond the flange resulting in a mechanically formed joint that will not leak, vibrate loose or pull apart.