QDE-3.5N normal braking air friction brake for wire machine

QDE-N normal braking air friction brake is spring applied air release working. That is to say, in normal without air pressure, brake is in braked status; after supplying air pressure, friction pads separated, brake is in released status. This is a large torque brake, max torque can be reach to 20000N.m.

There are two models of this caliper disc brake: QDE-3.5N, QDE-4N. They are equiped with 3.5" and 4" air cylinder head in separately, so their braking power is different, too. Following is the structure and technical data of this QDE-N brake.

According to this table, we will understand that these two models of brake friction pads open mouth is different. The QDE-3.5N is suitable for friction disk thickness is 25.4mm, and QDE-4N is suitable for friction disk thickness is 40mm. Although QDE-3.5N and QDE-4N cylinder head size is much different, one is 3.5# cylinder head, another is 4# cylinder head, their air volume is much different. QDE-3.5N air volume is 95cm³, QDE-4N air volume capacity is 300cm³. 

On the other hand, caliper disc brake's braking force is various as braking disc diameter. In air pressure is 0.6Mpa, when braking disk diameter is 760mm, QDE-3.5N braking force is about 8700N.m, QDE-4N is 10000N.m. When friction plate diameter is 1370mm, QDE-3.5N brake's braking power is 16500N.m, QDE-4N braking power is nearly 20000N.m.

It is an economic, durable, low cost, easy installation, simple maintenance and high precision control, wide torque adjustment, good heat dissipation, so it is widely used in packaging machinery, thin paper and corrugated paper machinery, printing machinery, wire equipment, textile machinery, rubber machinery, tire machinery, production line, paper making machinery, construction machinery, food machinery, plywood machinery and etc.

Handong company is an outstanding and professional manufacturer of pneumatic brakes in Shanghai, China. Each product should be pass various strict before dispatch, what we made is to satisfy each customer's requirement. Following are some pictures of our factory, products and company strength for your reference.