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Becker RF Asymmetrical Pulleys
Control Pulley A B< C D d min d max E< F G H J K< L M> N O Z Wt
R3 70 65 80 210 19 38 183 230 216 33 125 120 10 105 18 12 112 3.5

R4

80 80 110 245 19 42 234 280 265 36 140 135 10 145 20 14 125 6.0
R5 100 90 110 285 28 48 262 314 293 45 200 165 12 177 24 18 150 10.5
R6 115 112 140 345 38 60 322 379 358 45 200 195 15 228 24 18 172 17.5
R7 140 123 140 415 42 65 338 395 374 45 200 228 15 245 24 18 190 26.5
R8 170 135 140 450 55 75 390 460 439 51 250 247 20 265 30 20 240 42.0
R9 200 165 170 560 45 85 480 570 550 51 250 300 20 250 30 20 310 102.0
 
Tension Pulley D P R S d min d max T V X> Wt Berges Becker Asymmetrical pulley drives
K3 210 113 122 60 19 28 15 70 219 3.0
KN34 245 114 137 80 19 38 15 80 231 6.5
K4 245 122 146 80 19 38 17 80 256 6.0
KN45 285 137 171 110 28 45 15 100 270 8.5
K5 285 137 183 110 28 48 28 100 295 9.0
KN56 345 175 210 140 38 60 28 115 319 16.5
K6 345 175 226 140 38 60 30 115 348 17.0
KN67 415 185 251 140 42 60 30 140 388 26.0 bergesbecker 3/17 v-belts

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KN68 450 226 315 140 55 75 26 140 400 41.0
K7 415 185 260 140 42 60 30 140 418 27.0
KN78 450 228 323 140 55 75 26 170 449 43.0
K8 450 228 345 140 55 75 48 170 457 45.0
KN89 560 255 380 170 65 85 48 200 535 65.0
K9 560 255 380 170 65 85 48 200 575 75.00
 
Becker

Kw Range

Hp Range Speed Range Becker drive units RK, RKN for 5.5 to 150Kw motor ratings, comprising mechanically adjustable regulating pulley R with integral central adjustment and either Spring loaded automatic torque dependent regulating pulley K or KN with increased diameter for lower output speeds.  The axial pressure on the V-Belt is exerted by compression springs with optimally dimensioned characteristics.  The driving system is suitable for reversing operation.

The K - KN tensioning pulleys are uniquely suited to high starting torques and overload protection safety.

 

RK3 4 ~ 5.5 5.5 ~ 7.5 8/1

RKN34

5.5 7.5 5/1
RK4 7.5 ~ 11 10 ~ 15 8/1
RKN45 11 15 6/1
RK5 11 ~ 15 15 ~ 20 8/1
RKN56 18.5 25 5.4/1
RK6 22 ~ 30 30 ~ 42 8/1
RKN67 30 ~ 37 40 ~ 50 5.5/1
RKN68

37

50

5.2/1
RK7 37 ~ 55 50 ~ 75 6/1
RNK78 45 ~ 55 62 ~ 75 5.2/1
RK8 55 ~ 75 50 ~ 100 5/1
RNK89 75 100 4/1
RK9 90 ~ 150 125 ~ 200 3/1
Mechanically Infinitely Variable Speed Units with Broad V-Belts, BECKER System.   Optimum product quality and operational safety for all fields of application in machine and plant construction is achieved by infinitely variable speed control of motors to 150kW.  There are good reasons why the Berges BECKER System is obviously superior.  As against conventional systems, BECKER variable speed units with asymmetric profile have definite advantages.  The asymmetric system with the 2 degree sheave attached to the shaft and the axially moving 18 degree sheave ensures that the tensile forces of the belt are acting very close to the shaft bearings.  The bending moment acting on the free shaft ends is small and does not change when the pulleys are varied.  In accordance with the pulleys asymmetric broad V-belts are used.

As against conventional systems asymmetric BECKER V-belts have a smaller volume, which means:

  • More Lateral Rigidity
  • Lower centrifugal forces
  • Less internal heating.
  • more loading capacity
  • longer service life of the V-Belt
  • Installation & Pulley Alignment is easier than conventional systems.

The driven pulley with torque curve is another eminent feature of the product diversity of BECKER variable speed drives. The axial contact pressure rises so that sliding of the V-Belt during impact (SHOCK LOAD) or overload or start of machines with the great moments of inertia avoided.  Very high efficiency also during partial load operation as well as a considerably longer service life of the belt is ensured by the BECKER driven pulley with torque curve.

For more than 25 years, BECKER variable speed drives have been used successfully all over the world.  The investments made in the recent past and planned for the future to guarantee a constant good quality in the long run give a clear signal.  BERGES concentrates on the production of mechanical infinitely variable speed drives and has expanded its production program in order to meet the requirements of the market. 

TVT-America is well established as a Engineering, Marketing, and Distribution center for the Berges Becker Systems in North America.  For assistance in your application, please contact TVT today.  Engineering@tvtamerica.com, or simply call our toll free number at your earliest convenience to begin discussions regarding your unique application.

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Berges Becker Asymmetrical V-Belt Pulley Drives

Becker Antiriebe GMBH

There are good reasons why the Becker system is obviously superior. As against conventional systems Becker Variable SPeed units with asymmetric profile have definite advantages. The asymmetric systems with the 2 degree sheave attache to the shaft and the axially moving 18 degree sheave ensures that the tensile forces of the belt are acting very close to the haft bearings.

The bending moment acting on the free shaft ends is small and does not change when the pulleys are varied. In accordance with the pulleys asymmetric broad V-Belts are used. As against conventional systems asymmetrical BECKER V-Belts ahve a smaller volume, which means more lateral rigidity, lower centrifugal forces, less internal heating, and thus more loading capacity and longer service life of the asymmetric Becker V-belt.

As against gear drives with sheaves of the same angle, installation and pulley alignment are very easy. With the asymmetric BECKER variable speed units pulley alignment is achieved automatically and can be easily checked by lining the back of the 2 degree sheaves of both pulleys with a ruler. The driven pulley with torque curve is another eminent feature of the product diversity of Becker variable speed drives. Theaxial contact pressure of the V-belt required for the respective power tranmission is automatically adjusted by this toruq dependent device.   With increasing torque the axial contact pressure rises so that sliding of the v-belt during impact or overlad or start of machines with great moments of inertia is avoided.  Very high efficiency also during partial load operation as well as a considerably longer service life of the belt is ensured by the Becker driven pulley with torque curve.  For more than 25 years, Becker variable speed drives  have been used successfully all over the world.  The investments made in the recent past and planned for the future to guarantee a constat good quality in the long run give a clear signal:  Berges-Becker will concentrate on the production of mechanically infinitely variable speed drives also in the future and expand the production program in order to meet the requirements of the market.  This is another eature that distinguishes us from our competitors. 

 

 

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