Centrifugal clutches and brakes www.suco.de General technical explanations The most important factor for selection of a centrifugal clutch is the amount of power to be transmitted. Knowing the power available from the drive motor and the operating speed, the torque to be transmitted can be calculated and the size of the clutch determined. For the vast majority of drives, there is a wide range of clutch types and designs. Our sizes 01 to 13 cover – depending on engagement and operating speeds – a torque range up to ca. 2000 Nm. To be sure that clutches operate correctly, grease, oil and moisture must be kept away from their friction surfaces. Calculating the torque: Md n P = torque [Nm] = speed of rotation [rpm] = power P Md = Md · n 9550 = 9550 · [1Nm~10 kpcm] [1 kW = 1.36 hp] [1 hp = 0.7355 kW] 6 [kW] P n [kW] Md · n P = Md = 7162 · 7162 [hp] P n [hp]

www.suco.de Performance factor for torque transmission: The performance factor for torque transmission is a measure of the capacity of a clutch to provide sufcient friction to transmit the power applied to it when the yweights are in contact with the drum. Whereas a W-Type clutch has a performance factor of 1.0, an F-Type clutch of the same size with self-increasing effect is capable of transmitting a torque approximately 2.5 times greater at the same speed and with the same yweight mass. The asymmetric pivot clutch achieves a power factor of ca. 1.75 or ca. 1.25 depending on the direction of...

Centrifugal clutches and brakes www.suco.de F-Type Self-increasing clutch Construction and mode of operation The yweights 2 are seated on the proled hub 1 and are held against it by tension springs 3 , which are hooked into the linings 4 . Discs locate the yweights axially. Each lining has a crimping on its inner surface to locate it on the yweight. This prevents the linings from moving sideways. As the proled hub rotates, the centrifugal force acting on the yweights overcomes the spring force. When the speed is high enough, the linings contact the clutch drum 5 , and friction between the linings...

www.suco.de S-Type Centrifugal clutches and brakes Pin-guided clutch with three yweights Construction and mode of operation The cylindrical hub 1 carries three yweights 2 which are located by and can slide on cylindrical pins 3 . Inside the yweights, there are tension springs 4 which restrain neighbouring yweights until centrifugal force overcomes the spring force. Then the yweights lift from their seats and the linings 5 on the yweights contact the inside diameter of the clutch drum 6 . Friction between the linings and the clutch drum allows torque to be transmitted. 3 Cylindrical pin 2 Flyweights...

www.suco.de D [mm] B [mm] d max. [mm] Standard bore diameter d [mm] (inch) 2) Md at nE 750 and nB 1500 [Nm] Recommended motor power 3) [kW] Md at nE 1250 and nB 2500 [Nm] Recommended motor power 3) [kW] Md at nE 1500 and nB 3000 [Nm] Recommended motor power 3) [kW] 04 80 25 24 15 (3/4 ; 5/8 ) 4.3 0.3 12 1.6 17.5 05 90 25 30 14; 30 (5/8 ) 7.5 0.6 21 2.8 31 4.9 06 100 25 24 20; 24; 28 (3/4; 7/8 ) 11 0.8 30 4.0 43 7.0 07 d max. = max. bore dia. 2.8 1) Size Performance data and dimensions: 110 25 30 28; 30 (1) 15 1.2 45 6.0 64 25 40 20; 30 (1 1/2) 30 2.4 85 11.0 124 25 30 17; 30 (1; 1 1/8 ) 40 3.0...

www.suco.de Centrifugal clutches and brakes W-Type Pin-guided clutch with two yweights Construction and mode of operation The cylindrical hub 1 carries two yweights 2 , which are located by and can slide on cylindrical pins 3 . The tension springs 4 are attached outside the yweights to lining carriers 5 . The tension springs restrain the yweights until centrifugal force overcomes the spring force. Then the yweights lift from their seats and the linings contact the inside diameter of the clutch drum 6 . Friction between the linings and the clutch drum allows torque to be transmitted. 2 Flyweight...

www.suco.de Md at nE 1250 and nB 2500 [Nm] Recommended motor power 3) [kW] 1.7 0.14 4.6 0.6 6.6 3.7 0.3 10.3 1.4 14.8 2.3 06 100 20 30 30 5.7 0.45 16.0 2.0 23.0 3.6 07 110 20 40 - 8.6 0.7 24.0 3.2 34.5 5.5 08 125 20 40 20; 30 (1 1/2) 14.0 1.0 38.5 5.0 55 8.5 09 138 25 55 - 27.0 2.2 75.0 9.8 110 17 10 150 25 60 38 (1 1/ 8 ) 36.5 3.0 102 13 145 d max. = max. bore dia. 1.0 14 (5/ 8 ) 23 B [mm] The transmitted power increases as the width B is increased. Tapered bores and special dimensions can be manufactured on request. 3) Motor power is calculated using a safety factor of 2. Final selection of...

www.suco.de Centrifugal clutches and brakes P-Type Asymmetric pivot clutch Construction and mode of operation Flyweights 1 are normally mounted so that they can pivot on pins 5 , which are tted to a ange. There are tension springs 2 which restrain neighbouring yweights until centrifugal force overcomes the spring force. Then the yweights lift from their seats and the bonded linings 3 contact the inside diameter of the clutch drum 4 . Due to the asymmetric arrangement of the yweights, the torque that can be transmitted by this type of clutch depends on the direction of rotation. 1 Flyweight 2...

www.suco.de Performance data and dimensions: Md = torque nE = engagement speed nB = operating speed Recommended motor power 2) [kW] Md at nE 1250 and nB 2500 [Nm] Recommended motor power 2) [kW] Md bei nE 400 and nB 1400 [Nm] 1) B [mm] D [mm] Size P-Type clutches are ange mounted; for this reason standard bore diameters are not given. Possible bore sizes will be given on request. ØD 11 187.5 30 175 13 460 60 12 193 30 180 14 500 70 B Other sizes are available on request. 1) 2) The transmitted power increases as the width B is increased. Motor power is calculated using a safety factor of 2. Final...

www.suco.de Centrifugal clutches and brakes Different solutions, driven-side To accommodate the torque transmission needs of a wide variety of drives, there are many different versions in the SUCO product programme. Both axial and radial drives can be supplied. All versions can only be used in conjunction with a suitable drum or belt pulley. The operation of a clutch or brake without a suitable drum or belt pulley is forbidden. Non-compliance can result in injury to persons. Model K Core version -KThis version without a drum is supplied when a clutch or brake drum already exists in the customer‘s...