Asymmetric Variable Speed Belt Drives - 0.25 to 30 KW (With Automatic Torque Sensing Device) (Interchange to BECKER / BERGES)

Adjustable Center Variable Speed Pulley Drives

Assymetric Drive is suitable for 0.25 to 30 Kw motor ratings. The stepless output Speed Range in case of 1440 RPM Motor is from 425 to 4500 RPM. This drive is consisting of driveR Pulley (Mounted on Motor Shaft), driveN Pulley (Mounted on Gear Box/ Machine Shaft) and a Belt. DriveR Pulley is mechanically adjusted by means of screw spindle to achieve speed Variation and driveN Pulley gets automatically adjusted.

The drive has unique features of "Automatic Torque Sensing Device", which ensures optimum automatic axial contact pressure on the Belt, depending on rating of power to be transferred. Greater the torque, greater the Contact Pressure. This ensures that the belt does not slip during the intermittent operation, under excessive load or when the machine starts with flywheel effect. These features of the system guarantees very high efficiency, even under partial load and longer belt life.

Special Features

  • Disc mounted on Hub without key or splines thus minimises the wear
  • Speed Variation Ratio 11: 1
  • Life time Lubricated
  • Speed adjustment while the machine is in operation
  • Dynamically balanced
  • Finish bore with Keyway

When Selecting, the following are essential to start the process

How to Select Assymetric Variable Speed Drive & Belt

  • Motor Power & speed range - refer TABLE 1 for drive selection.
  • Check whether driveN pulley can accamodate the bore size of gear box / machine shaft - refer TABLE 1 or else, select one size above.
  • Center to center distance between motor & gear box / machine shafts - refer TABLE II nd for' belt selection.

Assymetric Selection Table - Table 1

Motor Power Drive ASM Output Speed Range Working P.C.D. Variable Speed Belt Bore Size
1400 R.P.M. SIZE Min. Max. Min. Max. Width x Th Min. Std. Max.
0.25 / 0.75 Kw Asm 130 540 3750 47 126 22x8 14 19 25
1.1 / 1.5 Kw Asm 150 480 4320 47 146 22x8 14 24 25
2.2 / 3.7 Kw Asm 210 425 4500 60 205 32x10 19 28 32
5.5/7.5 Kw Asm 245 425 4500 70 240 37x10 24 38 40
11/15Kw Asm 285 415 4500 80 278 47x13 28 42 45
18/22/30 Kw Asm 345 427 4500 100 337 52x16 38 48 60

Dimenssions - Table 2 (Refer Table 1 For Bore Size

Drive Size A B C D
ASM 130 130 95 195 Refer Table 3
For Belt
Selection
 
ASM 150 150 95 210
ASM 210 210 122 250
ASM 245 245 165 265
ASM 285 285 185 293
ASM 345 345 225 358

Belt Selection Table - Table 3

Drive Size 650 700 750 800 850 900 950 1000 1060 1120 1180 1250 1320 1400 1500 1600 1700 1800 2000 2240 2500
    Center Distance Between Motor Shaft & Gear Box / Machine Shaft  
ASM 130 203 228 253 278 303 328 353 378 408 . . . . . . . . . . . .
ASM 150 185 210 235 261 286 312 337 362 393 423 453 488 523 564 . . . . . . .
ASM 210 . . . . . 254 280 305 336 366 396 432 467 508 558 609 659 . . . .
ASM 245 . . . . . . . . 297 327 358 394 429 470 520 571 621 . . . .
ASM 285 . . . . . . . . . . . 360 395 436 486 537 588 638 740 860 991
ASM 345 . . . . . . . . . . . . . 375 426 477 528 579 680 . .

Caution - Change the speed in Running condition only

Specifications are subject to change without notice

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Manufacturer and Exporter of Mechanical Variable Speed Pulley Drives, Stepless Variable Speed Belt Drives, Variable Speed Belts, Variable Speed Drive for flameproof / explosive areas. We also design & manufacture custom built drives & pulleys as per customer’s requirements.

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