What do you need to know about pulley alignment?
This guide provides information for the implementation of good pulley alignment of belt-driven equipment including terminology, alignment methods as well as belt maintenance, storage and tensioning. The content of this guide and our 5-Step Sheave/Pulley Alignment Procedure are basic guides to re-align machines.
What to do if pulleys don’t track properly?
Tighten mounting. Check level and alignment of pulley shaft or belt will not track properly. If bearing is excessively worn, replace with new bearing. Check fit of inner race to ensure against bearing distortion. Check level and alignment at pulley shaft. Check shaft for straightness. Remove pulley to replace shaft.
How is torque transmitted from the pulley to the belt?
Drive torque from pulley to belt should be transmitted by the friction between the sides of the belt and the inner faces of sheave groove, never between the bottom of the groove and and belt. If the bottom of the groove is shiny, the belt is touching it. Next measure sheave runout.
What to do if a pulley bearing is worn out?
If bearing is excessively worn, replace with new bearing. Check fit of inner race to ensure against bearing distortion. Check level and alignment at pulley shaft. Check shaft for straightness. Remove pulley to replace shaft. Inspect bearings for damage and replace as necessary. Tighten bearing lock mounting bolts.
Do you need a Ludeca pulley alignment guide?
The content of this guide and our 5-Step Sheave/Pulley Alignment Procedure are basic guides to re-align machines. In practice, more details must be taken into account. LUDECA is not responsible for any damage or injury arising out of the use of these documents.
Why are laser pulleys used for sheave alignment?
Laser pulley alignment systems are now well established in the sheave alignment field, and have proven themselves in greatly reducing downtime and the manpower needed to do the alignment, while simultaneously achieving far greater accuracy. This results in significant labor savings and increased production uptime.
When to set the cams on a crankshaft?
I would suggest at this point in time that you start with the crankshaft at 30° before top dead center and set the cams. At this point, there will be plenty of clearance for valve in every cylinder. When the cams are in position, then rotate the crankshaft to TDC and install the belt.