The following text comes from my bridgeport Series 2 interact 4 Maintaince Manual.
Axis Motor/Belt Replacement
Adjust the belt tension so it is tensioned by a force of approximatly 135N (30lbf). If no belt tension meter is available an approximate guide is that at mid position between the pulleys the belt will deflect 6mm (1/4") from its mean position when a force of 70N (16lbf) is exerted on the belt.
Spindle Motor/Belt Replacement
After disconecting or replacing the 'V' belt, reset the tension as follows:
a) With the belt completely slack, mark two lines 500mm apart on the back of the belt. Tighten the belt by jacking out the motor carrier, until the lines are 503.0mm/5.03.5mm apart. Clamp the motor carrier and check that the belt tension is correct.
That may be of use to someone though i'm guessing it is both very machine and belt specific.
That said, the original question still remains, where on earth do i obtain a belt tension meter.?
__________________
Dom
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