Efficient Plant May 2018 - 20

5-STEP

SHEAVE/PULLEY ALIGNMENT PROCEDURE

1

2

3

4

5

Pre-Alignment
Checks

Runout and
Soft Foot

Laser
Alignment

Belt
Tensioning

Documentation

Check and correct shaft
runout.

Set up laser alignment
system and measure
misalignment.

Safety:
Lock-out and tag-out
the machines.

2X

Take two sets of belt
tension measurements.

Save the alignment file, if
your system allows for it.

TOL

Visual inspection of the
sheaves, belts, foundation
and baseplate.

Check and correct
sheave rim runout (radial)
and face runout (axial).

Correct twist misalignment
by shimming the motor feet.

Set the belt tension to
manufacturer's specifications.

Recommended tolerance:
±0.5 degrees. (9 mils/inch)

Typically, set tension to
recommended force to deflect
belts 1/64 inch per inch of span
length (tight side).
Be careful not to affect the
alignment during these
adjustments.

Replace sheaves if needed.
Using feeler gauges find
obvious gaps under the motor
feet and fill them with shims, to
eliminate any soft foot condition.
Clean up: remove rust,
scale, paint, dirt from under
and around the feet. Clean
sheaves as well.

Correct angular
misalignment by moving the
machine horizontally.
Recommended tolerance:
±0.5 degrees. (9 mils/inch)

Install new belts, if
needed. Always replace
all belts together with a
new matched set.
Correct offset
misalignment by moving
the machine axially.

Replace damaged shim
packs with new, corrosion
and crush resistant shims.

100

%

Torque bolts to specifications.

Recommended tolerance:
±8 mils (thou) per inch
of span length.

©Copyright 2017 by LUDECA, INC. No copying or reproduction of this information, in any form whatsoever, may be undertaken without
express written permission of LUDECA, INC. WARNING: The content of this graphic is a basic guide to re-align machines. In practice,
more details must be taken into account. LUDECA, INC is not responsible for any damage or injury arising out of the use of this document
Order No. 01-222-01

Re-check the
alignment.

2 HRS+

Run machines for two hours
to allow belts to stretch
and seat themselves then
recheck tension. Readjust as
necessary.

Keep it running.

Print the report to
document the alignment,
if your system allows
for it.

72-240 HRS
Run the machines at
least 72 hours, but not
more than 10 days and
retension again, this
time to manufacturer's
recommended force values
for used belts.

LUDECA.COM



http://www.LUDECA.COM

Table of Contents for the Digital Edition of Efficient Plant May 2018

Editorial
Implementations
Six Steps That Cut Costs
Educating Work-REady Students
Revisiting Benefits Of A CMMS
Lube Safety Comes In Threes
SAP: What Does This SAP Error Mean?
Are Your Electrical Workers Qualified?
Is Your Site Susceptible To Cyber Threats?
Pinpoint Funny Motor-Ground Currents
Properly Select Pressure-Relief Valves
On The Floor
Solution Focus
Products
Index
Showcase
Seeking Reliability
Efficient Plant May 2018 - Cover1
Efficient Plant May 2018 - Cover2
Efficient Plant May 2018 - 1
Efficient Plant May 2018 - 2
Efficient Plant May 2018 - 3
Efficient Plant May 2018 - 4
Efficient Plant May 2018 - 5
Efficient Plant May 2018 - Editorial
Efficient Plant May 2018 - 7
Efficient Plant May 2018 - Implementations
Efficient Plant May 2018 - 9
Efficient Plant May 2018 - Six Steps That Cut Costs
Efficient Plant May 2018 - 11
Efficient Plant May 2018 - 12
Efficient Plant May 2018 - 13
Efficient Plant May 2018 - 14
Efficient Plant May 2018 - 15
Efficient Plant May 2018 - Educating Work-REady Students
Efficient Plant May 2018 - 19
Efficient Plant May 2018 - 20
Efficient Plant May 2018 - 17
Efficient Plant May 2018 - 18
Efficient Plant May 2018 - 19
Efficient Plant May 2018 - 20
Efficient Plant May 2018 - 21
Efficient Plant May 2018 - Revisiting Benefits Of A CMMS
Efficient Plant May 2018 - 23
Efficient Plant May 2018 - 24
Efficient Plant May 2018 - 25
Efficient Plant May 2018 - Lube Safety Comes In Threes
Efficient Plant May 2018 - 27
Efficient Plant May 2018 - 28
Efficient Plant May 2018 - SAP: What Does This SAP Error Mean?
Efficient Plant May 2018 - Are Your Electrical Workers Qualified?
Efficient Plant May 2018 - Is Your Site Susceptible To Cyber Threats?
Efficient Plant May 2018 - Pinpoint Funny Motor-Ground Currents
Efficient Plant May 2018 - Properly Select Pressure-Relief Valves
Efficient Plant May 2018 - On The Floor
Efficient Plant May 2018 - 35
Efficient Plant May 2018 - Solution Focus
Efficient Plant May 2018 - 37
Efficient Plant May 2018 - 38
Efficient Plant May 2018 - 39
Efficient Plant May 2018 - Products
Efficient Plant May 2018 - 41
Efficient Plant May 2018 - 42
Efficient Plant May 2018 - 43
Efficient Plant May 2018 - 44
Efficient Plant May 2018 - 45
Efficient Plant May 2018 - Index
Efficient Plant May 2018 - Showcase
Efficient Plant May 2018 - Seeking Reliability
Efficient Plant May 2018 - Cover3
Efficient Plant May 2018 - Cover4
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