IDTECH SecureHead User Manual page 20

Please see the below drawing:
14. The length, width, and height of rail's slot will affect the stability of reading performance.
a) The length of the slot is the maximum permitted by dimensional constraints. If possible, it
should be 2 times the length of the card.
b) The slot width is to be approximately 0.20 mm bigger than the maximum thickness of the
card being swiped.
c) The height of the slot should be as big as dimensional constraints allow but not extend
over the embossing area of the card unless there is a provision (recess) in the rail wall
design allowed.
The amount of head travel and head protrusion determines the clearance between the head and the
For a standard rail with 1.03
wall of the rail window depends. The distance from the crown of the head to the surface of the spring.
minimum 1.25 mm clearance must be allowed on all sides of the head.
Note: Guideline does not apply when low profile heads are used. The window must allow clearance
for the portion of the spring welded to the magnetic head as shown in figure below.
0.08
−0
mm wide slot and a standard ID TECH head with 3.50 head protrusion
SecureHead™ Demo Program
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