Paper360 - March/April 2018 - 67

How Much Does a Slipping Belt Cost?

| TIPS

Ultrasound
Assisted
Lubrication

Technician using an Ultraprobe 201 Grease
Caddy from UE Systems.

When a bearing is in a lack of lubrication state, there is an increase in both friction
and noise. When using the ultrasonic instrument, the inspector listens to the bearing and
watches the decibel level on the instrument.
As grease is applied, there is less friction and
less noise.
Once a proper lubrication level is reached,
the dB level will remain steady and constant.
If grease continues to be applied, the dB level
will gradually start to increase. At this point,
lubrication would need to cease because the
threshold for over-lubrication has been
reached. An over-lubrication condition also
increases both pressure and friction inside
the housing, thus creating more noise.

This is the time series view from a recorded
ultrasound of a bearing in the process of being
lubricated. The sound file was approximately
13 seconds in length. Notice the levels before
lubrication on the far left, compared to the levels
after lubrication on the far right.

It is common to ignore belt squealing and slipping. Belts are often running to break-down, with
the argument that they are cheap to replace. So,
is it worth considering Reliable Manufacturing
techniques for belts?
WHAT WE KNOW:
* There are many causes of belt problems such
as tension, pulley /sheave, wear, overload,
contamination, or overheating.
* A properly adjusted V belt slips between
2-5 percent.
* The slip is simply the difference between
the RPM of the sheaves and the RPM of the
belt, expressed as a percentage. We can use a
stroboscope to get the data.

A sheave with three belts.

NOW FOR THE COOL PART (OR HOT, ACTUALLY!):
1. A 100 hp motor that has a 10 percent slipping belt is losing 10 hp! About 5-8 hp of
this loss can be avoided, since the normal belt slip is 2-5 percent.
2. Based on latest government data (June 2013), industry pays between
US$0.0416 /kwr (LA) and UW$0.1347/kwhr (MA). So, depending on where
you are in the country and what you pay for power, the cost is between
US$469/hp per year and US$1,408/hp/year.
Which means that additional 5-8 percent slip on a single 100 hp motor is costing
you between US$2,345 - US$11,264 every year, depending on where you are in the
country. Now ask yourself:
* How many belt drives do you have?
* Do any of them squeal?
* Could your belts cause a breakdown, incurring additional cost?
Contributed by Reliability Solutions Training LP, www.reliabilitysolutions.net.

Greasing Unsealed Applications
When greasing an application where
there is no seal, such as heavily loaded
chassis shackle pins or pins and bushings
on blades or buckets, two or three shots of
grease should be applied at the beginning
of every shift.
In wet or humid environments, such as
pulp and paper, marine, and road construction applications, it may be necessary to
relubricate more frequently to purge contaminants. The same is true for dusty and
dirty conditions associated with agriculture,
mining, or quarry applications.
Contributed by Noria Corp., www.noria.com.

An unsealed bearing.

Paper360º MARCH/APRIL 2018

67


http://www.reliabilitysolutions.net http://www.noria.com

Table of Contents for the Digital Edition of Paper360 - March/April 2018

Setpoint
Over the Wire
The Importance of Safety Training
Data & Decision Making
RISI European CEO of the Year: DS Smith’s Miles Roberts
Buckman’s Junai Maharaj on ‘The Art of the Possible’
Fapajal Tissue: Old, New & Customer-Centric
Progroup Turns 25
PIMA, Paper360° Co-Host Executive Panel
Creating a Lignin Culture
Benefits of Drive-Through Design
Sustainability as Business Leverage
CIPTE Show Highlights Innovation and Sustainability
TAPPI Journal Summaries
Leadership in Maintenance: Where Do We Start?
As a New Reliability Engineer, Are you Confused About Your Role?
R&M Tips
Paper and Board Have Key Roles in the Future of Packaging
Global Paper and Paperboard Demand Growing Despite Declines in Graphic Paper
PPI Awards Showcase Industry Excellence
TAPPI News
ASPI News
Index of Advertisers
Paper360 - March/April 2018 - intro
Paper360 - March/April 2018 - ebelly1
Paper360 - March/April 2018 - ebelly2
Paper360 - March/April 2018 - cover1
Paper360 - March/April 2018 - cover2
Paper360 - March/April 2018 - 3
Paper360 - March/April 2018 - 4
Paper360 - March/April 2018 - 5
Paper360 - March/April 2018 - Setpoint
Paper360 - March/April 2018 - 7
Paper360 - March/April 2018 - 8
Paper360 - March/April 2018 - Over the Wire
Paper360 - March/April 2018 - 10
Paper360 - March/April 2018 - 11
Paper360 - March/April 2018 - The Importance of Safety Training
Paper360 - March/April 2018 - 13
Paper360 - March/April 2018 - Data & Decision Making
Paper360 - March/April 2018 - 15
Paper360 - March/April 2018 - 16
Paper360 - March/April 2018 - 17
Paper360 - March/April 2018 - 18
Paper360 - March/April 2018 - 19
Paper360 - March/April 2018 - 20
Paper360 - March/April 2018 - 21
Paper360 - March/April 2018 - 22
Paper360 - March/April 2018 - 23
Paper360 - March/April 2018 - 24
Paper360 - March/April 2018 - 25
Paper360 - March/April 2018 - 26
Paper360 - March/April 2018 - 27
Paper360 - March/April 2018 - 28
Paper360 - March/April 2018 - 29
Paper360 - March/April 2018 - 30
Paper360 - March/April 2018 - 31
Paper360 - March/April 2018 - RISI European CEO of the Year: DS Smith’s Miles Roberts
Paper360 - March/April 2018 - 33
Paper360 - March/April 2018 - 34
Paper360 - March/April 2018 - 35
Paper360 - March/April 2018 - Buckman’s Junai Maharaj on ‘The Art of the Possible’
Paper360 - March/April 2018 - 37
Paper360 - March/April 2018 - 38
Paper360 - March/April 2018 - 39
Paper360 - March/April 2018 - Fapajal Tissue: Old, New & Customer-Centric
Paper360 - March/April 2018 - 41
Paper360 - March/April 2018 - 42
Paper360 - March/April 2018 - 43
Paper360 - March/April 2018 - Progroup Turns 25
Paper360 - March/April 2018 - 45
Paper360 - March/April 2018 - 46
Paper360 - March/April 2018 - 47
Paper360 - March/April 2018 - PIMA, Paper360° Co-Host Executive Panel
Paper360 - March/April 2018 - 49
Paper360 - March/April 2018 - Creating a Lignin Culture
Paper360 - March/April 2018 - 51
Paper360 - March/April 2018 - 52
Paper360 - March/April 2018 - 53
Paper360 - March/April 2018 - Benefits of Drive-Through Design
Paper360 - March/April 2018 - 55
Paper360 - March/April 2018 - Sustainability as Business Leverage
Paper360 - March/April 2018 - 57
Paper360 - March/April 2018 - CIPTE Show Highlights Innovation and Sustainability
Paper360 - March/April 2018 - 59
Paper360 - March/April 2018 - TAPPI Journal Summaries
Paper360 - March/April 2018 - 61
Paper360 - March/April 2018 - 62
Paper360 - March/April 2018 - 63
Paper360 - March/April 2018 - 64
Paper360 - March/April 2018 - Leadership in Maintenance: Where Do We Start?
Paper360 - March/April 2018 - As a New Reliability Engineer, Are you Confused About Your Role?
Paper360 - March/April 2018 - R&M Tips
Paper360 - March/April 2018 - Paper and Board Have Key Roles in the Future of Packaging
Paper360 - March/April 2018 - 69
Paper360 - March/April 2018 - Global Paper and Paperboard Demand Growing Despite Declines in Graphic Paper
Paper360 - March/April 2018 - 71
Paper360 - March/April 2018 - PPI Awards Showcase Industry Excellence
Paper360 - March/April 2018 - 73
Paper360 - March/April 2018 - 74
Paper360 - March/April 2018 - 75
Paper360 - March/April 2018 - 76
Paper360 - March/April 2018 - 77
Paper360 - March/April 2018 - 78
Paper360 - March/April 2018 - TAPPI News
Paper360 - March/April 2018 - 80
Paper360 - March/April 2018 - ASPI News
Paper360 - March/April 2018 - Index of Advertisers
Paper360 - March/April 2018 - cover3
Paper360 - March/April 2018 - cover4
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