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Air shaft brake NAB used in packaging and printing machine |
1. Brake structure NAB model air shaft brake is composed of cylinder, piston, piston, friction plate, bushing cover, cone-shaped bushing with wedge, bearing, guide parallel pin, return springs, sealing parts (O-ring) and fastener. Our HD company use superior quality NSK bearing, greatly prolong brake’s service life and stability. After more than 10 years improvement, NAB brake is also durable in high frequency and high load hard working environment. 2. Working theory: NAB model brake relies on air pressure to brake, return springs to release. After supplying air pressure, piston aircraft and friction plate move towards to and compressed shaft attached lining disc, producing resisting torque, until disc and other rotating parts stopped, brake linked. When exhausting air pressure, piston aircraft, and friction plate back and separated with shaft attached lining disc by return springs, brake released. It reduced heat generated from friction by cooling plate mounted on disc with hub. Friction plate is two-cut style, using screwdriver to take out head inside screw through hole of disc with hub, in order to replace friction plate. 3. Advantage and disadvantage: (1) Wide torque adjustment (2) Two-cut lining structure, using screwdriver to take out head inside screw through hole of disc with hub, in order to replace friction plate. (3) Small impact, can realize stable braking. (4) Bushing with optimal design, heat plate can dissipate heat rapidly. (5) High frequency and high load working environment can be use. (6) Thicker friction lining make sure long service life. (7) No electric spark, safety and anti-explosion. Orientation braking is available, tension controller also can be use. 4. Operation precaution NAB model brake installs conical shaft spanned tube onto shaft in following order: 1) Embed the key into shaft inside, and get brake body through shaft. 2) Find the key, and install conical shaft spanned tube into where the key is embedded. 3) Align the cut-out of conical shaft spanned tube to the bolt hole of shaft spanned disc and use three screws to fasten them. When fasten, pay attention to see the dial indicator, and the level deviation of fitting surface of pistol. |
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