1622V336 Variable Speed Belt

Variable Speed belts are for use on variable speed pulley drives requiring exact speed control and maximum range of speed changes.  Variable speed drives are employed where the operating speed of the driven pulley must vary over a wider range.  Axial movement of the variable speed pulley flange changes the pitch diameter (radial position) of the belt and therefore belt speed, and so the rotational speed of the driven pulley.  The sidewalls of the belt conform to the angular faces of the pulley flanges.

A variable speed drive may consist of either one or two pulleys with moveable flanges.  In a drive with only one pulley having a single moveable flange, the center distance is changed to force the belt to move radially.  For a drive using two pulleys, each having a moveable flange(s), one pulley’s flange works against a spring, which allows the flange to move axially and change the radial position of the belt.  The other pulley is mechanically opened or closed using axial force.  The axial force applies a radial pressure to the angled sides of the belt and causes radial movement.  On the spring pulley, the force from the belt sidewall forces the spring outward and opens the flanges or allows it to move inward and close.  This changes the pitch diameter of the belt and the rotational speed of the driven shaft.  Two pulley systems usually provide a wider speed range than a single variable speed pulley drive.

American Variable Speed (ARPM) belts are specified by top width, the pulley groove angle and pitch length.  The groove angle can be measured from the drive pulleys – Example: 3236V369

Features & Benefits

•High Modulus Tensile Members – Ensures minimum stretch and excellent belt length stability

•Raw Edge Sidewalls – Provides maximum grip and smooth, quiet performance

•Oil & Heat Resistant – Delivers excellent durability in harsh environments

•Chloroprene Rubber Compound – Excellent resistance to wear

Construction

Compound – Chloroprene

Cord – High Modulus

Sidewalls – Raw Edge

Applications – General Industry, Agriculture, Machine Tools

Engineering Standards –

American Standard Sizes – conform to ARPM/RMA standard IP-25