Adjustable Center Variable Speed Pulley

Adjustable Center Variable Speed Pulley Drives Interchange to Lenze Pulley

Speed Variation Ratio – 1 : 3
0.25 KW TO 18.5 KW
The spring loaded pulley is mounted on the shaft of the electric motor which is firmly fixed on the motor slide base or swinging base plate and moved towards or away from the fixed diameter pulley when in operation.
As the centre distance changes, the variable speed belt is pulled in or out between the two flanges of the spring loaded pulley, thus changing the effective running diameter of the pulley and the speed variation is achieved of the fixed diameter pulley.
The speed variation ratio achieved is 1:3 and in combination with fixed diameter pulleys of various diameters, practically full middle speed range is covered.

This drive comprises of :-

• Spring Loaded Pulley
• Fixed Diameter Pulley
• Variable Speed Belt
• Motor Slide Base

How To Select
While selecting the drive, the following parameters are essential.
Known -

• Motor Power and Speed

• Driven speed requirement of both maximum and minimum speeds.

• Approximate centre distances between Motor shaft and machine/ Gear box to suit space condition.

To Find -

• Spring Loaded Pulley Size
• Motor slide base size
• Fixed pulley diameter
• Variable speed belt length

Process -
Step 1 - Select the table according to the motor power & speed.

Step 2 - Suitable spring loaded pulley and motor slide base sizes have been specified in the table.

Step 3 - Select the fixed pulley diameter according to the required output speed range.

Step 4 - Select the suitable belt length, according to the minimum centre distance between Motor shaft and machine or Gear box shaft.