The Mechanical Joining 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. Mechanical joints can withstand over 20,000 pounds of hydro-static pressure and will not leak, pull apart, or come loose due to pressure, vibrations, or temperature change.
Application: Fittings and Tubes
Material Compatibility: Ductile Metals
Machine Compatibility: Assisted Expansion Machines and CNC Machines (rare cases)
Tooling Compatibility: Electric or Pneumatic Motors
Mechanical Joining Tool Operation
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.
Expansion Detailed View
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.