Haltech E6K - Manual (Page 141)

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Haltech REM1 rare earth magnets are normally 5mm dia x 2mm depth, although other sizes
are available upon special order.
The magnets should be fitted in non-ferrous surrounds such as aluminium, stainless steel or
titanium. The trigger wheel is normally made of the chosen material but various users have
reported good results when the magnets are set in a suitable non-ferrous surround and the
surround is set into a ferrous material.
The magnets should be set flush with or slightly back from the surface of the trigger wheel or
surround. If set too far back the magnetic signal may be too weak. The magnets should be set
in place with a strong and durable fixing compound such as high strength epoxy, Loctite stud
locking compound eg 603, or JBweld. Some users rely only on the fixing compound but to
ensure that the magnets remain in place but many prefer that they be retained by mechanical
means such as peening, and this gives an added safety factor.
WARNING:
RARE EARTH MAGNETS ARE EASILY DAMAGED AND THE
PEENING PROCESS (OR LOCATION BY GRUB SCREWS ETC)
SHOULD BE VERY CAREFULLY CARRIED OUT SO AS NOT TO
DAMAGE THE MAGNETS. IF DAMAGED THEY WILL NOT HAVE
SUFFICIENT MAGNETIC STRENGTH OR MAY FAIL
MAGNETICALLY OR PHYSICALLY AFTER A PERIOD OF TIME.
If installed correctly the magnets will have a long life.
Note: In the following examples, for ease of reference, the magnets are shown
mounted on the circumference of a wheel with the Haltech Hall effect sensor
oriented to one side. If so mounted the magnets need to be mounted with
sufficient strength to resist centrifugal force. In practice the magnets are often
mounted within the circumference of the wheel and the sensor is mounted so
that its base is pointed towards the magnets in the face of the wheel.