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HOW THE FITZROY BALL BEARING TRACK SYSTEM WORKS

OUTER SECTION

Manufactured from either hard alloy aluminium extruded to precision tolerances or machined steel to ensure the size and shape of internal ball grooves.
BALL RETAINING CAGE
The cage operates purely as a ball retainer and does not share any load other than the weight of the steel balls.
INNER SECTION
(Carrier Bar)
Also manufactured from hard alloy aluminium extruded to precision tolerances or machined steel to ensure the size and shape of internal ball grooves.

UNIVERSITY TESTED

The University of Melbourne Engineering Department tested a typical section of FITZROY track.

The track was subjected to 258 hours of non-stop opening and closing operation.

This means that the test door opened and closed fully 130,000 times, travelling approximately 160 kilometers.

PRECISION MEASUREMENT RESULTS WERE IMPRESSIVE.

Cage Wear - No evidence of wear on either surface

Ball Wear - Precision measuring found no evidence of ball wear.

Track Wear - 0.0005", So minute as to be regarded as negligible.

CONCLUSION
From these exhaustive tests, the wear rate calculated was so low it was not possible to estimate the life of the track.