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QDF-2 air driven friction disc brake
QDF-2 air driven friction disc brake is actuated by air pressure. So when air pressure larger, then its braking force is larger, too.

QDF air driven friction disc brake has two models: QDF-2 and QDF-3. These two models of brakes are used to clamp steel disc thickness both 12.7mm, while their braking force is different. QDF-3 braking force is nearly twice of QDF-2 air brake.
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