I prepared below file to be attached to each quotation my company makes.

In my Business , I do not want to be normal Bearing Supplier.
Prepared this two pages letter to be attached to each quotation during sales.

Goal is less bearings are purchased for whoever would purchase rolling bearings from Khash … Not More !

Soon in Sohar Oman , My Company Outlet will be Operational…
Wish me the best.

I decided to write below article about this service I would be providing my clients in Oman.

Quotation_Attachment_Complimentary_Bearing_Technical_Session Download

A Bearing Quotation Should Not End with a Price

It Should Begin with the Question: Why Did the Previous Bearing Fail?

The image of me inside our outlet, inspecting damaged rolling bearings while preparing a Reliability Improvement Proposal, represents exactly how I want our bearing business to operate.

On one side of the table is the failed bearing.

On the other side is the replacement quotation.

Between them must be engineering analysis.

A conventional bearing supplier normally answers four questions:

What is the bearing designation?
Which brand is available?
What is the price?
When can it be delivered?

These questions are commercially necessary—but they are not enough.

A technically responsible bearing supplier should also ask:

Why did the previous bearing fail, and what must be corrected before the new bearing is installed?

At Specialists Bearings, Lubrication, and Commercial Services SPC, our commercial identity is built around bearing solutions, lubrication excellence, reliability and performance—not only the sale of mechanical components.

Our objective is not simply to help customers buy bearings.

Our objective is to help customers buy fewer replacement bearings by achieving longer, more reliable operating life from every bearing installed.

The Failed Bearing Is Evidence

A failed bearing should never be treated as scrap before it has been examined.

Its raceways, rolling elements, cage, seals, lubricant deposits, corrosion marks, discoloration, fracture surfaces and wear patterns can preserve valuable information about what happened inside the machine.

However, bearing failure analysis must be approached carefully. A photograph or visual inspection may indicate a probable failure mechanism, but it does not automatically prove the root cause. Reliable conclusions require the physical evidence to be combined with the machine’s operating history.

Before cleaning or dismantling the bearing unnecessarily, we should record:

The bearing’s orientation and installed position.
Drive-end or non-drive-end location.
Rotational direction.
Shaft and housing arrangement.
Operating speed, load and temperature.
Lubricant type, quantity and relubrication interval.
Mounting and dismounting method.
Hours in service.
Previous vibration, temperature or noise observations.
Any recent maintenance or alignment work.

A bearing can tell us how it was damaged, but the machine history helps us understand why the damage developed.

Why Did the Bearing Fail?

When I receive a failed bearing, I do not immediately conclude that the bearing quality was poor.

Bearing damage can result from many interacting conditions, including:

Incorrect bearing selection.
Insufficient or excessive internal clearance.
Improper shaft or housing fits.
Misalignment or shaft deflection.
Incorrect mounting force.
Impact damage during installation.
Insufficient lubrication.
Excessive grease quantity.
Incompatible greases.
Inadequate lubricant viscosity.
Solid-particle contamination.
Water ingress.
Ineffective sealing.
Electrical current passage.
Excessive vibration during standstill.
Overloading or shock loading.
Improper axial location.
Excessive operating temperature.

For example, installing a more expensive bearing will not solve the problem when the real cause is a shaft fit that is too tight and has eliminated the required operating clearance.

Similarly, changing brands will not prevent recurrence when the bearing is repeatedly overgreased, contaminated during installation or subjected to electrical current from a variable-frequency drive motor.

The replacement bearing may be completely genuine and correctly manufactured—and still fail prematurely because the surrounding reliability conditions remain unchanged.

This is why every failed-bearing review must separate three different questions:

What damage is visible?
What operating mechanism produced that damage?
What underlying maintenance, design or operating condition allowed that mechanism to occur?

That third question is where real reliability improvement begins.

1. Why Did the Bearing Fail—and How Can Khash Help You Buy Fewer Bearings?

The first part of our complimentary technical session focuses on the failure itself.

Depending on the available evidence, we examine indications such as:

Raceway and rolling-element fatigue

Spalling or flaking may indicate that the bearing reached fatigue life, but it can also develop prematurely because of contamination, overloading, inadequate lubrication, misalignment or incorrect internal clearance.

Therefore, the presence of spalling alone is not sufficient to declare “normal fatigue.”

Smearing and sliding damage

Smearing can occur when rolling elements slide rather than roll correctly. It may be associated with rapid acceleration, insufficient load, poor lubrication, excessive speed, an unsuitable lubricant or disturbed rolling kinematics.

Abrasive or adhesive wear

Polished surfaces, scoring and loss of material may indicate contamination, lubricant-film failure, poor sealing or unsuitable viscosity.

Indentations

Indentations may be caused by hard contaminant particles, incorrect mounting force or impact transmitted through the rolling elements.

The spacing and distribution of the marks are important. Repeated patterns may indicate installation damage or vibration while the machine was stationary.

Fretting and false brinelling

Damage at the ring-seat interface may point toward inadequate interference, micro-movement or poor surface condition.

False brinelling can develop when a stationary bearing is exposed to vibration, causing small oscillatory movements that displace lubricant and damage the contact zone.

Electrical erosion

Fluting, frosting or crater-like damage can indicate current passage through the bearing.

In such cases, replacing the bearing without addressing shaft grounding, insulation, drive configuration or common-mode voltage merely restarts the failure cycle.

Overheating and discoloration

Darkened rings, burnt grease, hardened lubricant deposits or cage deformation may indicate excessive temperature. The source may be overgreasing, inadequate clearance, excessive preload, high speed, poor lubricant selection or restricted heat dissipation.

Cage damage

A broken cage is often the final consequence—not necessarily the initiating cause.

The investigation must consider vibration, shock loads, misalignment, acceleration, contamination, insufficient lubrication and previous rolling-element damage.

The purpose of this review is not to create a dramatic diagnosis from one photograph. It is to develop a technically defensible list of probable causes and identify the additional information required to confirm them.

2. How Are You Mounting and Dismounting the Bearing?

Many bearings are damaged before the machine returns to service.

The bearing may be correct, the lubricant may be correct and the application may be suitable—but the installation method may introduce damage that shortens operating life from the beginning.

During our technical review, we discuss questions such as:

Was the bearing mounted cold, heated or hydraulically?
Was the correct ring used to transmit the mounting force?
Was force ever transmitted through the rolling elements?
Was an induction heater used with controlled temperature?
Was the bearing struck directly with a hammer?
Were the shaft and housing seats measured?
Were tolerances confirmed or assumed?
Were shoulders, fillets and spacer faces inspected?
Was bearing internal clearance measured before and after mounting?
Was the locking method applied correctly?
Was the bearing contaminated during installation?
Was shaft alignment verified after assembly?

One of the most fundamental mounting principles is that the installation force should pass through the ring being fitted.

When mounting an inner ring onto a shaft, the mounting force should not travel from the inner ring, through the rolling elements, and into the outer ring. Doing so can create microscopic or visible indentations in the raceways.

Those indentations may later generate vibration, noise, stress concentration and premature fatigue.

For tapered-bore bearings, the issue becomes even more critical. The bearing must be driven to the correct position while controlling either the reduction in radial internal clearance, axial drive-up or another approved mounting parameter.

Too little drive-up may allow ring creep.

Too much drive-up may remove excessive clearance and create high operating temperature or preload.

Dismounting practices are equally important. If the customer expects to reuse the bearing—or preserve it for failure analysis—the extraction force, tool position and handling method must avoid introducing new damage that can be mistaken for operating damage.

3. How Are You Lubricating the Bearing?

A bearing quotation is incomplete if lubrication is ignored.

The lubricant is not merely a consumable placed inside the bearing. It is a functional component responsible for separating surfaces, reducing friction, limiting wear, protecting against corrosion and supporting heat management.

A lubrication review must consider more than the lubricant brand or grease colour.

Lubricant selection

For grease-lubricated bearings, we need to consider:

Base-oil viscosity at operating temperature.
Thickener type.
NLGI consistency.
Speed capability.
Operating-temperature range.
Mechanical stability.
Water resistance.
Corrosion protection.
Load-carrying requirements.
Compatibility with the existing grease.
Compatibility with seals and surrounding materials.

A grease can be technically excellent and still be unsuitable for a particular bearing speed, temperature or relubrication arrangement.

Grease quantity

More grease does not automatically mean better lubrication.

Excess grease can cause churning, elevated temperature, increased torque, lubricant degradation and possible seal damage.

Too little grease may leave the rolling contact inadequately supplied, particularly where the replenishment path is poor or the operating conditions promote lubricant loss.

The correct initial fill and replenishment quantity should reflect the bearing geometry, housing free volume, speed, orientation, sealing arrangement and operating environment.

Relubrication interval

The interval should not be selected only because “we grease every month.”

It should be based on relevant operating variables, including:

Bearing type and size.
Rotational speed.
Operating temperature.
Load.
Contamination severity.
Shaft orientation.
Vibration.
Grease performance.
Purging and discharge conditions.

A fixed calendar interval may be too long for one machine and unnecessarily short for another.

Lubrication application

We also need to know where the grease enters and where the displaced grease exits.

A correctly calculated grease quantity can still fail to reach the rolling elements when:

The grease line is blocked.
The fitting is installed in an ineffective location.
Old hardened grease obstructs the path.
The housing has no suitable relief route.
The lubrication groove is incorrectly positioned.
A remote lubrication line is excessively long or poorly sized.
The wrong grease gun output is assumed.

This is why lubrication must be reviewed as a complete delivery system—not merely as a product selection exercise.

What Will Be Attached to Our Bearing Quotations?

Whenever practical, our bearing quotations will be supported by a concise Reliability Improvement Proposal.

Depending on the information provided by the customer, the proposal may include:

Bearing requirement

Confirmation of the requested designation, dimensions, internal clearance, sealing arrangement, cage execution and any identified supersession or alternative.

Initial failure observations

A structured summary of visible damage found on the rings, rolling elements, cage, seals and lubricant condition.

Probable contributing factors

A technically ranked discussion of possible causes, clearly separating confirmed facts from engineering hypotheses.

Immediate actions

Recommendations that should be completed before the replacement bearing is installed, such as checking shaft and housing dimensions, correcting fits, inspecting seals, verifying alignment or reviewing lubricant compatibility.

Reliability improvements

Longer-term measures related to mounting tools, induction heating, contamination control, lubrication procedures, condition monitoring, electrical-current mitigation, storage and technician training.

Information still required

Any missing data necessary for a more conclusive investigation.

This proposal is intended to help the customer move from component replacement to failure prevention.

One Complimentary 60-Minute Technical Session with Khash

Together with our bearing quotation, customers may request a complimentary one-hour technical session covering:

1. Why did the bearing fail?

We review the available evidence, identify likely damage mechanisms and determine which additional checks are required.

2. How are you mounting and dismounting it?

We examine tools, procedures, fits, heating, force transmission, clearance control and contamination risk.

3. How are you lubricating it?

We review grease or oil selection, quantity, interval, application method, contamination control and compatibility.

This complimentary session is not presented as a substitute for a complete laboratory investigation or formal root-cause analysis when the failure is complex.

It is a practical technical screening designed to help the maintenance team avoid repeating obvious or preventable mistakes—and to determine whether a deeper site assessment is required.

“Helping You Buy Fewer Bearings” Does Not Mean Selling Less Value

Our statement may sound unusual for a bearing supplier:

Khash will help you buy fewer bearings.

It does not mean reducing necessary inventory or encouraging customers to operate without critical spares.

It means reducing:

Repetitive bearing failures.
Emergency purchases.
Unplanned shutdowns.
Damage to shafts and housings.
Maintenance overtime.
Production losses.
Lubricant waste.
Rework after incorrect installation.
The repeated purchase of bearings for an unresolved problem.

A customer who receives longer bearing life, better technical support and fewer emergencies becomes a stronger long-term partner than a customer who repeatedly purchases the same bearing because the root cause was never investigated.

That is the commercial model I want to build.

Not transactional selling.

Technical partnership.

Not only part numbers.

Failure mechanisms and corrective actions.

Not only a quotation.

A proposal for reliability improvement.

Before Requesting Your Next Bearing Quotation

Where possible, send us:

The complete bearing designation.
Machine and bearing position.
Clear photographs of all bearing components.
Operating speed and temperature.
Approximate operating hours.
Lubricant name and relubrication practice.
Mounting and dismounting method.
Failure history.
Vibration or temperature trends.
Shaft and housing fit information.
Details of any VFD or electrical-current concern.

The better the evidence, the more useful the recommendation.

A bearing price can be prepared from a part number.

A reliability proposal requires us to understand the application.

At Specialists Bearings, Lubrication, and Commercial Services SPC, every quotation is an opportunity to discuss how the replacement bearing can operate longer, cleaner, cooler and more reliably.

Because the best bearing quotation should not merely answer:

“How much is the new bearing?”

It should also answer:

“What are we changing so that we do not replace it again too soon?”

Khashayar Hajiahmad (Khash)
Founder & Technical Consultant
MLE, CLS, MLA III, MLT II, VIM, VPR