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PNS/BF Pneumatic Static-cylinder Multi-disk Clutch

The excellent technical, construction and operating characteristics of PNS/BF Pneumatic Static-cylinder Multi-disk Clutches have resulted in a wide number of applica-tions through the manufacturing industry. Their simple design includes a central hub, a disk pack, two axial bearings and a fixed cylinder with a working piston.

Since the cylinder does not rotate, no centrifugal forces are developed in the pressurized oil, thus permitting more rapid coupling and, in particular, uncoupling, which improves intervention frequency.

A series of high-spring-rate thrust springs returns the piston rapidly to its neutral position and have little effect on the working thrust. The fixed piston transmits its thrust to the rotating disks through a rugged axial bearing. The stroke of the piston and thrust springs permit disk-wear take-up, thus eliminating the need for adjustment.

Since these clutches have all-steel disks and axial bearings, they must operate in an oil bath or under oil-mist conditions.

Description of PNS/BF Pneumatic Static-cylinder Multi-disk Clutches

The excellent technical, construction and operating characteristics of these clutches have resulted in a wide number of applica-tions through the manufacturing industry. 

Their simple design includes a central hub, a disk pack, two axial bearings and a fixed cylinder with a working piston. Oil/air under pressure enters through external port «A», a solu-tion which permits the elimination of complicated channeling and allows several clutches to be mounted on the same shaft. Since the cylinder does not rotate, no centrifugal forces are developed in the pressurized oil, thus permitting more rapid coupling and, in particular, uncoupling, which improves intervention frequency. A series of high-spring-rate thrust springs returns the piston rapidly to its neutral position and have little effect on the working thrust.The fixed piston transmits its thrust to the rotating disks through a rugged axial bearing. The stroke of the piston and thrust springs permit disk-wear take-up, thus eliminating the need for adjustment. Since these clutches have all-steel disks and axial bearings, they must operate in an oil bath or under oil-mist conditions. The only situation where they could be operated dry is when the R.P.M. are not very high and the intervention frequency is very low. Since these clutches are designed for operation with oil under pressure, they are ideal for applications on equipment using hydraulics. On request, these clutches are also available for operation with compressed air. The compressed-air versions have a special single seal instead of the two rubber seals used in the oil clutches, which allows compressed-air sealing in the cylinder. In order to avoid any dragging in the neutral position, we can supply, on request, units provided with special diskseparating springs. This feature is particularly useful where the clutch is mounted vertically or in the presence of very sensitive moving parts or when greater uncoupling precision is required.

MOUNTING
When mounting, please follow our instructions and examples. The work cylinder must be anchored, but not fixed rigidly, between a bracket located at one of the three 120° milled spots on the work cylinder. The bracket is to be hooked onto the most convenient milled spot, in relation to the oil filler hole, making sure the work cylinder has some axial and radial play.


Use a flexible oil/air line, so as to avoid creating axial and radial tensions which, if excessive, could upset the proper working characteristics of the bearings and thus cause poor operation and eventual clutch failure. The oil/air line should not be too long and should not have any tight bends, kinks or any alternation that could impede free flow, the lack of which could lead to clutch damage. If the clutch is to have a maximum service life, it needs to be well lubricated, such as by splashing or, better yet, by using forced lubrication. We suggest that you contact the FU Ibérica to obtain recommendations regarding the type of use of the oil. In any case, the oil viscosity should not exceed 5°E/50°C. The torque values given in the graph are only valid for our recommended working pressures. Pressure changes will produce PROPORTIONAL increases or decreases in torque: i.e., torque is proportional to working pressure. As the working pressure changes, the maximum allowable clutch R.P.M. will change, as shown in the diagram on the next page.

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Información ampliada

Clutches, brakes, couplings and limiters. Full Catalogue  

Información técnica

Producto Ficha técnica
Embrague Neumático Multidisco Directo PNS/BF PNS/BF Pneumatic Static-cylinder Multi-disk Clutches Descargar

Referencia en base a pieza

Pneumatic Static-cylinder Multi-disk Clutches PNS/BF, PNS025/BF , PNS045/BF , PNS065/BF

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