Pneumatic clutches and brakes - Type FK
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Drum Type pneumatic clutches and brakes type FK Catalog Nº: FK Contents General Characteristics Element Description Element FK Construction and Characteristics FK Element components Technical and dimensional data

General characteristics The FK Element is designed and constructed to provide a reliable service of a clutch or brake in a majority of industrial applications, even in the severest ones. The Element combines the advantages of a strong robust clutch with the characteristics of a flexible coupling, while not requiring lubrication or adjustment. Type FK It is suited to applications which are high speed and have cyclical operations. Drive principle The FK Elements use a neoprene rubber air tube, reinforced by nylon cord materials which quickly expand inwards when pressurized. This action causes...

General characteristics Self Adjustment The Elements tube automatically compensate as the friction surface wears down, eliminating the necessity of adjustment, without reducing the elements ability to transmit torque. No Lubrication There are no crucial sliding components, which require lubrication. The centrifugal force aids in the clutch disengagement When the pressure is released from the tube, the centrifugal force, acting on the friction shoes at the rotating element, retract the shoes away from the surface of the drum. This type of effect retracts the tube pressurizing source and the...

Element description The Elements are identified by a number and type of different features and fittings used to make the connection from the tube valve or inlet to flange on the rim, and also by the type of friction material and other unique rim features. Most of the unique rim features only pertain to FK elements. Holes in both flanges DUAL DRILLED (DD) Holes are drilled in both flanges to be used for the air and mounting connections such as in the case of a dual Element. Flanges DUAL FLANGE (DFL) This is the description for rims with dual flange, standard for FK Elements versions: from...

Element description SLOTTED RIM A "U" shaped cutout in the flange of the rim, providing access for piping directly to the air inlet (valve). Especially in small sizes. Turned down flange TURNED DOWN FLANGE Applies to FK elements only. Sizes from 16FK500 thru 45FK525 come standard with dual flange, this description is used when one of its flanges is reduced or turned down to provide clearance for adjacent components. Valve VALVE / INLET (VA or VAL or VL) This part of the tube allows for a mechanical connection to inflate and deflate. The Elements of sizes from 3FK150 to 14FK400 are...

Dellner's line of clutches and brakes offered for a variety of applications where high acceleration and deceleration are common within modern machines or equipment that are continuously functioning. They are available in a variety of models, sizes and assembly configurations; and are used throughout the world in almost every industry, such as: oilfield, steelworks, pulp and paper mills, marine, mining and the textile industry to name a few. Dellner manufactures and designs their products for there particular need to transmit power, in the most simple and suitable way possible. General...

Single flanged Element Dual flanged Element The FK type Element is designed and manufactured to offer a reliable clutch or break service in the most demanding industrial applications. They are best suited to high velocity, cyclical operations in a variety of general power transmission applications. The FK design and construction is operationally simple. A neoprene element in the shape of an air tube, which is reinforced with several ply of cords, is vulcanized to the inside of a steel rim. Inside, is a set of friction shoes that are attached to the tube using shoe pins and lock wire kit....

A single moving component The tube is the only moving component; there are no springs or sliding parts. Split Elements Size 6FK200 thru 40FK525 can be provided in this configuration. This type of element is used to facilitate the installation, maintenance, and disassembly in applications where there is a limited amount of axial space. Normally, the single flange Elements thru size 10FK300 are used as breaks, whereas the Dual flange Elements can be used both as a clutch or a break. Shock-absorbing effect Due to the fact that the tube transmits torque through its sidewalls, it works like a...

Rim Tube Elbow Air Connection tube Gasket 1 1 Friction Shoe 1 Shoe Pin 1 1 Lockwire 1 Quick release valve 2 Air tube for dual assembly Spacer for dual assembly NOTES: 1- Unavailable item for size 3FK thru 5FK, due to the fact that friction material is vulcanized with the chamber and is not interchangeable. 2- Optional.

Technical data Size 3 to 14 * The data displayed in the catalog is current and subject to change without previous notice. NOTES: 1- Refers to basic part number only. Does not include union or hose. When ordering, please specify the number of air inlets and the type of connection. 2- Dynamic torque is shown, while the static torque is about 25% greater. In each application, the torque depends on the air pressure and speed. 3- Tolerance by size Size 3 to 5: +0,000/-0,003 ins. (+0,00/-0,8 mm). 6 and next: +0,000/-0,005 ins. (+0,00/-0,13 mm) 4- NPT threads. Sizes from 3FK thru 5FK only...

Dimensional data Size 3 to 14 D2 D24 L * The data displayed in the catalog is current and subject to change without previous notice. 12

Technical data * The data displayed in the catalog is current and subject to change without previous notice. NOTES: 1- Refers to basic part number only. When ordering, please specify the number of air inlets and the type of connection. 2- Dynamic torque is shown, while the static torque is about 25% greater. In each application, the torque depends on the air pressure and speed. 3- Tolerance by size Size 12 to 24, 28 and 32: +0,000/-0,005 in. (+0,00/-0,13 mm). 26 and 30: +0,000/-0,008 in. (+0,00/-0,20 mm). 36 to 45: +0,000/-0,010 in. (+0,00/-0,25 mm). 4- NPT threads. Sizes 12 and 14...