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QDE-3.5N spring engaged air caliper disc brake
QDE-3.5N spring engaged air caliper disc brake is controlled by springs, so normally it is in braked status.So spring quantity more, then its braking force is larger,too.

There are two models of this QDE-N spring engaged air caliper disc brake: QDE-3.5N and QDE-4N. They are used to clamp steel disc thickness 24.5mm and 40mm in separately.
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