pdf Rail Signal Bond PDF



A reliable signal wire-to-rail connection (RWI) is essential for signal system functionality. RWI  failures cause service disruptions and can also affect the integrity of the rail, leading to rail failure. We at Twinco have developed your solution, the new Mechanical Rail Signal Bond.


  • Provides a reliable electrical connection to rail
  • Quick and easy to install
  • Fixture is both easily removable and reusable
  • Accommodates all rail sizes
  • Preserves rail integrity





Twinco’s Mechanical Rail Signal Bond features a spring loaded Clamp Assembly (Figure 1), which is used to mechanically press a Wire Contact Jaw (Figure 2) into the rail flange. This process ensures a constant electrical connection is maintained over a wide range of temperature and vibration conditions. This results in an unchanging electrical resistance of the bond for as long as it is applied.


Figure 1: Clamp Assembly


Figure 2: Wire Contact Jaw

Installation Instructions


Ordering Information

Twinco Part Number



Rail Signal Bond Kit
(Includes items show in both Figure 1 and Figure 2)


Clamp Assembly
(Includes items shown in Figure 1)


 Wire Contact Jaw
(Includes items show in both Figure 1 and Figure 2)