CADWELD® Connections for Train Control & Neg Power Return


CADWELD connections

Service time and over 100 million installed bonds prove that the CADWELD Process provides the ultimate in desirable features for railroad signal bonding. ERICO provides an offering of both rail head and rail web signal bonds.


Rail Head Bonds:

  • Industry standard for joint bonding
  • Provide maximum detection of broken rail within the splice bar, contributing to the safest possible signal system
  • 3/16 dia./14 mm2 – 250 kcmil/120 mm2

CADWELD rail head joint bonds provide:

  • Maximum broken rail protection
  • Unchanging electrical resistance
  • Maximum corrosion resistance
  • Maximum protection against physical damage – 7 to 1 shear strength over a pin head bond
  • Are not destroyed by rail end build up

Rail Web Bonds:

  • Utilize preformed Type W terminals
  • Provide a convenient means of connecting all cable outside the confines of the splice bar
  • Connection is least susceptible to vibration fatigue and kept clear of dragging equipment and maintenance machinery
  • 3/16 dia./14 mm2 – 500 kcmil/250 mm2


CADWELD rail signal bonds can be used on old, worn or new rails.

More Information

CADWELD connections Rail Head Bonds CADWELD connections Rail Web Bonds
Rail Head Bond Rail Web Bond

Signal Joint Bond for Use with T-6 and T-7 Welders
CADWELD connections

Joint Head Bond Ordering Information

Bond Length XS Style TAB Style HEAD FREE Style
Cable Size Cable Size Cable Size
3/16″ 3/16″ 5/16″ 3/16″
6-1/2″ SBS24882 SB20104 SB20112
7″ SB20175
7-1/2″ SBS24883 SB20136 SB20128
9-1/2″ SBS24884 SB20108 SB20116

Note: All 3/16″ Joint Head Bond Terminals are 3/4″ long; 5/16″ are 1″ long.

Necessary Welding Material, a flint igniter and a pair of replacement molds are packaged with each 100 bonds. Two complete mold cleaners are supplied with each 500 bonds.

Engineering Specifications
All electrical connections to rail should be welded with the CADWELD copper-based exothermic welding process as manufactured by ERICO.

All connections within the splice bars should be to the “field” side of the railhead.

All other connections should be made on the rail web at the neutral axis.