16
Pulley alignment
Pulley alignment
Importance of good alignment
Good pulley alignment increases efficiency by reducing premature
wear or failure of pulleys, belts and bearings. Pulleys can be
aligned using the conventional string and straight-edge method
but this often time consuming and prone to error.
For the reflector version, PULLALIGN uses the tested, proven and
well known reflected single beam principle, to significantly help
reduce installation time, manpower and potential errors associ-
ated with pulley alignment and installation. With this principle,
the return beam angle is twice the angle of incidence and the
reflected beam travels twice the distance, hence enhancing
accuracy. Alignment is carried out to great accuracy, resulting in
labour savings and increased production uptime.
Machine preparation
Before commencing any work ensure basic safety rules are
adhered to.
Warning
Loose clothing or long hair must never be allowed anywhere
near belt-driven machinery. All equipment must be locked out
and tagged out.
Causes of belt failure
Before beginning any pulley alignment, causes of belt or pulley
failure must be examined and corrected to prevent recurrence.
Causes of failure could include poor drive maintenance (wrong
belt tension, poor pulley alignment), environmental factors
(sunlight, harsh temperature fluctuations), improper installation
(wrong belts/sheaves, belts forced onto grooves), or operating
factors (overload, shockload).
Inspection
Perform a visual inspection of the belts and of each pulley and its
grooves. Look out and feel for cracks, chips, or excessive groove
wear. Proper contact between the belts and the pulleys must be
ensured.