RAIL BOND
19 mm / M12 copper bush
RAIL BOND
THREAD
M12
DRILLING
DIAMETER :
19 mm
THICKNESS
OF RAIL WEB :
17 mm max.
BUSH MATERIAL :
TIN-PLATED
COPPER


This rail bond is used for connecting electric cables to rails.
It enables to conduct high currents like return of the traction current, as well as low currents like signalling currents.

This rail bond is pre-assembled in factory and consists of :
  • a cylindrical bush 19 mm in tin-plated copper, with a contact flange and tapered bore
  • a stainless steel, tapered dowel with M12 thread
  • a M12 self-locking nut with crimped 27 mm stainless steel washer.
APPLICATION

* Drilling in the web of the rail :
The hole drilled in the rail web must be 19 mm (0/+0,35).
This tolerance is imperative but it is easily achievable using a reamer-drill.

* Setting of the rail bond :
This rail bond is set with a hand hydraulic tool type PH4iN.
It is used to fix the rail bond in the rail by expansion of its bush.
By means of a release valve, adjusted in factory, which limits the hydraulic pressure force, this tool calibrates the force used for setting the rail bond into the rail.

* Connections :
Fit the crimped lug with its cable onto the rail bond.
Lug connection is made by tightening the stainless steel nut, which has been given an anti-seizure treatment. A torque wrench is used for this tightening. The torque value to apply is 72 Nm.

* Removing the rail bond :
If the rail bond is damaged by some external force, it may be taken away using a bush remover and a hammer.

TECHNICAL SPECIFICATION

  • Total electrical resistance of the rail bond : 15 µ..
  • Electrical resistance of the contact between the rail bond and the rail : 5 µ..








Rail bonds delivered
in storage box
(10 rail bonds per box).