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Rail web Permanent Electrical Contact

for hole diameter 8 - 8,5 mm

Rail web cable connection applications:
  • Traction return bonding
  • Continuity bonding
  • Signal track circuit connection
  • Ground bonding

This unique system was designed and developed by Cembre in 1988 following a review of existing electrical connection systems.

The aim of the Cembre system is to provide a low resistance interface between the rail web and the terminal lug.

Following in-depth testing in the laboratory and extensive fi eld trials, the system has been recognised and approved for total reliability.

  • low electrical resistance (microhm)
  • simple to install, not dependent on operator skill level
  • quick and easy to install (less than one minute)
  • easy to connect/disconnect cables, for fault finding
AR 67 System components:
  • Copper bush type AR 67-1 protected on surface by suitable metal plating (Cu-OF, copper CW008A according to UNI EN 13600:2003)
  • Steel M6 screw with hollow hex head (AR 67-3X Stainless steel A4-80, zinc. plated thickness 7-12 μm; Cup flange Stainless steel X2CrNi19-11 / AISI 304L)
  • Flat Steel washer (M6 washer Ø 13x24 Stainless steel A2)
  • M6 self-lock nut Stainless steel A3P (Ebs 20.20.26)


Typical application:

Various connections involved
in the train location 



AR67 rail web connection, rail side

Technical characteristics Other characteristics

Ø Stud mm 8 mm
Minimum thickness of the rail 14 mm
Maximum thickness of the rail 16.5 mm
Rail type 49E1 (S49)
Rail type 54E3 (S54)
Rail type 60E1 (UIC60)
Patented yes

Media gallery other media


notes and legal information

Cembre Via Serenissima, 9 - 25135 Brescia - ITALY
© Copyright 2019 Cembre S.p.A.

CODICE FISCALE – P.IVA: 00541390175
CAPITALE SOCIALE: € 8.840.000 i.v.