Description
Cembre AR67 Rail Web Bush Connection Kit
The Cembre AR67 Rail Web Bush Connection Kit provides a permanent, low-resistance electrical connection point within the rail web for railway signalling and track circuit applications.
Designed for 14–16.5 mm rail web thickness, the AR67 is installed into a precision-drilled 8 mm hole in the rail web and provides an M6 electrical connection for the attachment of approved cable lugs and railway conductors.
The AR67 forms part of Cembre’s original rail web electrical connection system and is specifically designed for applications where a smaller rail web connection is required, particularly signal track circuit connections, continuity connections and associated railway signalling circuits.
Rather than relying on a welded or externally clamped connection, the Cembre AR67 uses a conductive copper bush that is mechanically expanded within the rail web. This creates a permanent metal-to-metal electrical interface between the bush and the rail.
The result is a highly reliable rail electrical connection designed to maintain stable, low contact resistance while withstanding vibration, weather exposure and the demanding environmental conditions encountered in railway infrastructure.
Cembre AR67 Rail Web Connection System
The Cembre AR67 is a single-sided permanent electrical contact developed specifically for rail web connection applications.
During installation, an accurately sized hole is drilled through the rail web before the conductive copper bush is inserted and mechanically expanded using the appropriate Cembre hydraulic installation tool together with the AR67-INST Installation Kit.
The extrusion process causes the conductive bush to conform closely to the internal surface of the rail web hole, creating a permanent electrical interface between the rail and the bush.
Because the electrical connection is produced mechanically rather than thermally, installation does not require welding or heating of the rail.
This avoids creating a heat-affected zone and allows the AR67 connection to be installed consistently in varying weather and track conditions.
AR67 Signalling and Track Circuit Applications
The Cembre AR67 rail web bush kit is particularly suited to railway signalling applications, including:
- Signal track circuit connections
- Signal track circuit continuity
- Track circuit power connections
- Track circuit receiver connections
- Rail continuity connections
- Ground bonding
- Railway signalling connections
- Rail electrical connections
- Track connections
Once installed, the permanent copper bush remains mechanically connected to the rail while the external cable lug and conductor can be disconnected, inspected or replaced without disturbing the rail interface.
This makes the AR67 particularly useful for signalling systems where electrical connections may need to be disconnected during testing, fault finding or maintenance.
Cembre AR67 Technical Specifications
Manufacturer: Cembre
Part Number: AR67
Product Type: Single-sided rail web electrical bush connection
Electrical Contact Type: Single
Number of Cable Connections: 1
Rail Web Thickness: 14–16.5 mm
Required Rail Hole: 8 mm
Electrical Connection: M6
Bush Material: Copper
Bush Surface Treatment: Tin plated
Nut: Stainless steel self-locking nut
Installation Type: Cold mechanical extrusion
Copper Connection Tightening Torque: 10 Nm
Aluminium Connection Tightening Torque: 6.5 Nm
Typical Applications: Railway signalling, track circuits, continuity connections and ground bonding
Manufacturer technical information: Cembre AR67 Official Product Page
How the Cembre AR67 Rail Bush Connection Works
The reliability of the Cembre AR67 comes from the permanent mechanical interface created between the conductive copper bush and the rail web.
An accurately sized 8 mm hole is first drilled through the rail.
The AR67 copper bush is then positioned in the rail web and installed using a compatible Cembre hydraulic installation tool together with the AR67-INST installation kit.
During installation, the calibrated Cembre OG6.5 plunger is drawn through the bush, mechanically expanding the copper against the internal surface of the rail hole.
The extrusion process allows the bush to conform closely to the surface of the drilled hole and creates a stable metal-to-metal electrical connection.
This connection method provides excellent resistance to:
- Rail vibration
- Mechanical movement
- Moisture
- Weather exposure
- Atmospheric contaminants
- Long-term environmental conditions
Because the permanent bush remains installed within the rail, the external cable connection can subsequently be removed or replaced without drilling another hole or disturbing the permanent rail interface.
AR67 Rail Drilling and Installation Requirements
The Cembre AR67 requires an 8 mm diameter hole to be drilled through the rail web before installation.
For the best fit and drilling result, Cembre recommends using the:
- PE80 8 mm drill bit
- APED80 adapter
The PE80 drill bit and APED80 adapter are designed for use with compatible Cembre rail drilling machines including the:
- Cembre LD-16B-RPT
- Cembre LD-42P
Using the specified Cembre drill bit and adapter helps produce the accurate 8 mm rail web hole required for correct installation of the AR67 electrical contact.
After drilling, the hole should be checked using the CAL8.85 checking gauge supplied with the AR67-INST installation kit before the AR67 bush is installed.
Installation of the AR67 then requires the dedicated AR67-INST installation kit together with a compatible Cembre HTEP or B1300TEP-T hydraulic installation tool.
8mm Rail Hole
The Cembre AR67 is designed for installation into an 8 mm diameter rail web hole.
The hole should be accurately drilled and checked before installing the electrical contact.
AR67-INST Installation Kit
The Cembre AR67-INST is required when installing an AR67 using compatible Cembre hydraulic rail contact installation equipment.
The AR67-INST kit contains the components necessary to adapt the installation system for the smaller AR67 rail contact:
- OG6.5 calibrated installation plunger
- CAL8.85 rail hole checking gauge
- M9M5 installation adapter
The CAL8.85 gauge is used to verify the drilled rail hole prior to installation.
The M9M5 adapter allows the AR67 installation components to be used with the compatible Cembre extrusion head.
The OG6.5 plunger performs the controlled extrusion of the AR67 copper bush against the internal surface of the rail web hole.
Battery Hydraulic Installation Tool
Cembre B1300TEP-T
The B1300TEP-T provides portable battery-powered hydraulic installation of Cembre rail web electrical contacts.
When installing the AR67, the AR67-INST Installation Kit must be used in addition to the B1300TEP-T.
The standard AR60D/AR260D installation components supplied with the tool are not suitable on their own for installing the smaller 8 mm AR67 contact.
Manual Hydraulic Installation Tool
Cembre HTEP
The HTEP provides a manual hydraulic installation option for Cembre AR rail web electrical contacts.
When installing an AR67 with the HTEP, the AR67-INST Installation Kit is also required to provide the correct gauge, adapter and OG6.5 installation plunger.
Engineering Supplies supplies the AR67-INST separately for customers who already own a Cembre HTEP or B1300TEP-T and need to add AR67 installation capability to their existing rail connection tooling.
Using the correct Cembre installation equipment provides a controlled and repeatable AR67 installation and ensures the copper bush is correctly extruded into the rail web.
Why Use the Cembre AR67 Rail Web Connection?
Designed for Railway Signalling
The AR67 is specifically suited to signal track circuit and railway signalling connections where a compact, permanent electrical interface with the rail is required.
Small 8mm Rail Hole
The AR67 requires only an 8 mm rail web hole, considerably smaller than the 19 mm hole used by larger Cembre AR60D and AR260D connection systems.
No Welding Required
The electrical connection is established through controlled mechanical extrusion rather than a thermal bonding process.
This removes the need to weld or heat the rail during installation.
Permanent Low-Resistance Rail Interface
Controlled expansion of the copper bush creates a stable metal-to-metal electrical connection directly with the rail web.
Maintainable Cable Connection
The cable lug and conductor can be disconnected for testing, fault finding or replacement without removing the permanent rail web bush.
Repeatable Installation
The dedicated AR67-INST installation components provide controlled installation of the AR67 using compatible Cembre hydraulic tools.
Genuine Cembre AR67 Rail Web Bush Connection Kits
The Cembre AR67 forms part of Cembre’s original rail web electrical connection system and is specifically designed for railway signalling, track circuit and rail continuity applications requiring a compact, permanent electrical connection to the rail web.
The AR67 uses a mechanically expanded copper bush installed into an 8 mm rail web hole, providing a reliable M6 electrical connection without welding or heating the rail.
For projects, rail authority specifications and maintenance requirements calling for a Cembre AR67, Engineering Supplies can supply the genuine Cembre product together with the dedicated AR67-INST installation kit, compatible hydraulic installation tooling and associated Cembre rail drilling equipment.
If you require an AR67, Cembre rail web bush kit, 8mm rail connection, signalling rail connection, track circuit connection or associated installation tooling, contact Engineering Supplies for product selection, availability and technical support.
Cembre AR67 Frequently Asked Questions
What size hole is required for the Cembre AR67?
The AR67 is designed for installation into an 8 mm diameter hole through the rail web.
The drilled hole should be checked using the CAL8.85 gauge supplied in the AR67-INST installation kit before installing the contact.
What rail web thickness suits the AR67?
The Cembre AR67 is suitable for rail web thicknesses between 14 mm and 16.5 mm.
What size electrical connection does the AR67 use?
The AR67 uses an M6 cable connection.
What is the Cembre AR67 primarily used for?
The AR67 is primarily used for railway signalling and track circuit applications, including power, receiver and continuity connections.
It may also be used for rail continuity and ground bonding applications where the AR67 system is specified.
Does the AR67 require the AR67-INST installation kit?
Yes.
The AR67-INST Installation Kit is required when installing an AR67 using compatible HTEP or B1300TEP-T hydraulic installation equipment.
The kit contains the OG6.5 installation plunger, CAL8.85 checking gauge and M9M5 adapter required for the smaller AR67 contact.
Can I use my existing Cembre HTEP to install an AR67?
Yes, provided the AR67-INST Installation Kit is fitted.
The HTEP can therefore be used for larger Cembre AR contacts as well as the smaller AR67 by changing to the appropriate installation components.
Can the B1300TEP-T install a Cembre AR67?
Yes.
The B1300TEP-T can be used to hydraulically install the AR67 when combined with the AR67-INST Installation Kit.
Is the AR67-INST included with the HTEP or B1300TEP-T?
The standard HTEP and B1300TEP-T are primarily configured for the larger AR rail connection systems.
The AR67-INST is a separate installation kit required to provide the dedicated OG6.5 plunger, CAL8.85 gauge and M9M5 adapter necessary for AR67 installation.
Engineering Supplies supplies the AR67-INST separately for existing Cembre tool users requiring AR67 installation capability.
Is the AR67 a welded rail connection?
No.
The AR67 rail contact creates its permanent electrical rail interface through cold mechanical extrusion of the copper bush within the rail web.
Can the cable be disconnected after the AR67 is installed?
Yes.
The permanent copper bush remains installed within the rail while the M6 cable connection can be disconnected for testing, maintenance, fault finding or cable replacement.
Cembre AR67 Supply and Technical Support in Australia
Engineering Supplies supplies and supports the AR67 rail web bush connection kit together with the dedicated AR67 installation equipment and complete Cembre rail connection tooling range.
We can assist with:
- AR67 supply
- AR67-INST installation kits
- 8 mm rail web connection systems
- Cembre rail drilling equipment
- Battery hydraulic installation tools
- Manual hydraulic installation tools
- Technical product information
- Rail signalling connection identification
- Complete Cembre rail connection systems
Required Installation Kit:
Cembre AR67-INST
Battery Installation Tool:
Cembre B1300TEP-T
Manual Hydraulic Installation Tool:
Cembre HTEP
Contact Engineering Supplies for pricing, availability and technical support on the Cembre AR67, AR67-INST and complete Cembre rail electrical connection range.
