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Anonymous Poster #1

Gear Box Lubrication With Grease

10/21/2019 5:05 AM

Gear Box grease lubrication how to decide quantity and regreasing interval

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Anonymous Poster #2
#1

Re: Gear Box Lubrication with Grease

10/21/2019 7:06 AM
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#2

Re: Gear Box Lubrication with Grease

10/21/2019 7:06 AM

One of the ways is to review the facility's maintenance records.

Another is to contact the gearbox manufacturer for recommendations.

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#3

Re: Gear Box Lubrication with Grease

10/21/2019 11:41 AM

..."How do you know which lubricant is the best fit for a given application? Typically, it is as simple as searching through a maintenance manual and selecting a product from the QPL (qualified product list). Unfortunately, this solution may not always provide optimum lubrication for a given gear set, or maximum efficiency in managing lubricant inventory.

While some original equipment manufacturers (OEMs) provide generic specifications that consider pertinent parameters, others give only a general specification that may not even consider operating temperatures. It is therefore important for the individuals responsible for selecting lubricants to posses a fundamental understanding of how to specify lubricants for gearing.

In addition to understanding and being able to interpret the specifications given by equipment manufacturers, it is important to understand why, and be able to make changes when necessary.

When selecting lubricants for industrial gearing, numerous factors must be considered beyond simply selecting a product from the maintenance manual’s QPL, including product availability, operating conditions, the preferred lubricant brand and product consolidation efforts. Proper lubricant selection is a cornerstone of any excellent lubrication program.

A good understanding of this allows the lubrication engineer to maximize machinery reliability under normal conditions, as well as use lubricant specification as a problem solver in abnormal conditions."...

Figure 1. Minimum Allowable Viscosity for Lubrication of Rolling-element Bearings at Operating Temperature

https://www.machinerylubrication.com/Read/1318/tribology-lubricant-selection

https://www.machinerylubrication.com/Read/30390/selecting-lubricants-specifications

https://www.machinerylubrication.com/Read/926/gear-oils

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#4

Re: Gear Box Lubrication With Grease

10/21/2019 1:24 PM

The correct answer is given by PWSlack.

There are thousands of different "gear boxes" and just as many "greases," and just as many operating environments.

Read the manual. If you don't have a manual, you should get one today. You can probably download it in the same manner as you found CR4. Google the manufacturer and S/N of your gearbox.

As a last resort, pick up a telephone and call the seller, or manufacturer, of the item.

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#5
In reply to #4

Re: Gear Box Lubrication With Grease

10/21/2019 1:40 PM

This might be a manufacturer who needs to determine what recommendations to make....in this case that answer would be no help at all...the OP is the only one who can determine which answer is helpful or not...

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#6
In reply to #5

Re: Gear Box Lubrication With Grease

10/21/2019 3:07 PM

You can't POSSIBLY be serious! Can you?

Did your feelings get hurt when no one praised your answer?

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#7
In reply to #6

Re: Gear Box Lubrication With Grease

10/21/2019 3:58 PM

You can't defy logic and be surprised when someone calls you out...Your inability to counter my statement and instead opt for a personal attack, pretty much says it all....

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#8
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Re: Gear Box Lubrication With Grease

10/21/2019 4:27 PM

You defy logic be stating that "This might be a manufacturer."

I challenge you to identify any manufacturer that would post, "Gear Box grease lubrication how to decide quantity and regreasing interval," on this,or any, public forum.

Did OP ask what grade, type, viscosity of grease to use? No, simply " how to decide quantity and regreasing interval."

You are simply being defensive because your post, which was a fine general explanation of greases was not necessarily germane to the question, "Gear Box grease lubrication how to decide quantity and regreasing interval,"

To coin a phrase recently used by one of your heroes, "get over it!"

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#9
In reply to #8

Re: Gear Box Lubrication With Grease

10/21/2019 4:50 PM

So you don't think an online publication called machinery lubrication is relevant to gear box lubrication recommendations?

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#10
In reply to #9

Re: Gear Box Lubrication With Grease

10/21/2019 5:44 PM

Your machinery lubrication post is fine if you have knowledge of the equipment to hand, but it says, "In addition to understanding and being able to interpret the specifications given by equipment manufacturers."

It's an incredible leap of faith to believe that the OP is an equipment manufacturer.

I will take back all my statements if the OP actually is an equipment manufacturer.

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#11
In reply to #10

Re: Gear Box Lubrication With Grease

10/21/2019 6:33 PM

Well he could be working with a prototype or engineering model, and is preparing to have the design evaluated for manufacture...or any number of other scenarios where no previous lubrication recommendations are available...In this case the many articles available at the cited link would at least provide a groundwork for making an educated guess....as to the quantity and interval of maintenance procedures, nobody can say without knowledge of all the conditions and materials involved...even the manufacturers recommendations may not be complete or suitable for this application...

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#12
In reply to #11

Re: Gear Box Lubrication With Grease

10/21/2019 10:05 PM

You are attempting to defend an indefensible position.

Let's wait and see.

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#13
In reply to #12

Re: Gear Box Lubrication With Grease

10/21/2019 10:13 PM

You are discounting a logical approach...I'm content to wait and see....

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#15
In reply to #7

Re: Gear Box Lubrication With Grease

10/22/2019 9:20 AM

Now, now. Play nicely.

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#14
In reply to #4

Re: Gear Box Lubrication With Grease

10/22/2019 2:10 AM

Oh to live in the wonderful part of the world where there are actually manufacturers and not just importers who can give recommendations for lubricants and gearboxes. Often the items are made in far off lands where Chinglish may be the only language and manuals are nonexistent.

Then the gearbox may be old or obsolete or the manufacturer is no longer in existence, gone the way of the global warming, and the internet is of no help so then what do you do, well you can't pick up the telephone, you can't request a manual, you can't find a maintenance instruction or you are trying to write one, been there headached that, so you look for help from kindred spirits who may have knowledge on this subject.

The type of grease used depends on the type of gears and bearings, for to use high moly grease may have detrimental effects on rolling bearings. Good luck with sourcing information and reject the Captain Obvious crowds input.

If you don't have grease specifications then look to the lubricant supplier for their recommendations for the type of gears and bearings.Have you ever pulled a sealed bearing apart and checked the amount of grease present in one of those, definitely not overloaded so not a lot of the correct lubricant is needed to do the job just the correct type.

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#16

Re: Gear Box Lubrication With Grease

10/22/2019 11:34 AM

Generally it is helpful to identify the equipment name and any model and service information for the gearbox you are talking about. Otherwise we are just shooting in the dark, though it can be entertaining to watch the various personalities do their battlebot impressions.

One possible point of interest is grease incompatibility. There was a huge problem going on with motor operated valves in navy ships and in the civilian nuclear industry during the '80s. The manufacturers of several brands of motor operators for valves called out a greasing interval and an API specification for grease. However, the grease formulations from different grease manufacturers were proprietary information and it turned out that mixing the same API spec grease from different manufacturers could cause the grease to convert to a solid block of soap and freeze the gearbox or degrade into a runny liquid and something like limestone. The solution was to limit greases used to specific brands that in testing didn't have an undesirable outcome when mixed. The best results came from identifying a specific brand and consistently using it. I once needed to do a repair on a cuckoo clock that had clock oil that had turned into something resembling cottage cheese, probable from the original oil reacting as if the brass frame and gears was supplying a metallic drier to polymerize the oil.

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Anonymous Poster #2
#17

Re: Gear Box Lubrication With Grease

11/20/2019 12:11 PM
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