RFSSW Series

Solid-State Spot Welding System

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Refill Friction Stir Spot Welding (RFSSW)

Bond’s RFSSW Machines replace resistance spot welding with a process better suited to aluminum alloys, and mechanical fastening with a zero-part-count method.

  • Solid-state joining – no shielding gas required
  • Mechanical disruption of the oxide-covered surfaces
  • Single setup for different thicknesses
  • Capable of joining dissimilar materials
  • Low cycle time – sub-one-second in some alloys/thickness


A fully automated welding cycle creates a weld in three steps:

  • The non-rotating clamping ring compresses the work pieces
  • The rotating shoulder and probe contact the part, then the probe presses into the part as the shoulder retracts, disrupting the sheet interface
  • The shoulder and probe then reverse directions, returning to the original part surface

1. Clamping ring (cylindrical)

2. Shoulder (cylindrical)

3. Probe (rod)

The interface between the plates is bonded metallurgically by upsetting the interface under heat and pressure, creating a strong weld between the layers.


Applications for the Bond RFSSW Series machines include:

  • Automotive
  • Aerospace
  • Electronics

RFSSW Series Specifications

As with all Bond machine products, multiple options
are available with the RFSSW Series machines, such as extended throat depths.

Max Travel Speed
Max Force
3,500 mm/min (138 in/min)
20 kN (4,500 lbs)
120 mm (4.7 in)
Position control,
Force feedback
Max Travel Speed
Max Force
2,000 mm/min (80 in/min)
15 kN (3,400 lbs)
-10 mm / +18 mm
Relative to shoulder
Position control,
Force feedback
20 mm (0.8 in)
Relative to shoulder
2 to 9kN (500 to 2,000 lbs)
Adjustable through setup
(Select at time of order)
Max Rotation Speed
6,000 rev/min
4,000 rev/min
23 N-m @ 5,600 rev/min
36 N-m @ 3,600 rev/min
Mass of Unit
100 kg (220 lbs) w/std. 165 mm anvil
Throat Depth
165 mm (6.5 in), standard
Extended throat depth,
609 mm (24 in), 160kg (353 lbs)
Other sizes upon request
* Actual values may vary slightly
Combined force of Clamp Ring + Shoulder + Pin limited to 40kN

Download Bond’s Refill Friction Stir Spot Welding brochure

Let Bond Technologies help you find the best Refill Friction Stir Spot Welding (Refill FSSW) solution for you.

Bond Technologies offers a full line of friction stir welding (FSW) machines, custom engineering solutions, and a host of other services to help you integrate FSW technology into production.