Page 1 — Front Cover

THE BEARING BOSS

Journal & Thrust Bearings in Turbomachinery

Visual idea:
Khash standing between a journal bearing and a thrust bearing, with Captain Rotor in the middle.

Main line:
Mount Right. Measure Right. Inspect Right. Repair Smart.

Page 2 — Meet the Heroes

WHO SUPPORTS THE ROTOR?

Introduce:

• Mr. Journal Bearing → supports radial load
• General Thrust → controls axial load
• Captain Rotor → depends on both

Comic tone:
“Without us, the rotor becomes a troublemaker!”

Page 3 — Why Journal Bearings Matter

NO OIL FILM = NO PEACE

Explain:

• hydrodynamic lubrication
• oil film separates metal surfaces
• why turbomachinery depends on stable oil film

Main line:
The shaft rides on oil — not on metal.

Page 4 — Journal vs Thrust Bearing

RADIAL vs AXIAL — KNOW THE JOB

Explain clearly:

• journal bearing = radial support
• thrust bearing = axial positioning
• where each is used in turbines, compressors, pumps

Main line:
Different loads. Different missions.

Page 5 — Bearing Parts & Terminology

KNOW THE PARTS BEFORE THE PROBLEM

Show:

• shell
• pad
• babbitt
• pivot
• oil inlet
• journal
• collar
• thrust shoes / pads

Main line:
If you cannot name it, you cannot inspect it well.

Page 6 — Before Mounting

DIRTY HANDS, DIRTY FUTURE

Pre-mounting checks:

• cleanliness
• correct parts
• drawings
• orientation marks
• oil holes
• babbitt condition
• housing condition

Comic line:
“Contamination loves bad workmanship.”

Page 7 — Mounting the Journal Bearing

MOUNT IT RIGHT OR REGRET IT LATER

Explain:

• shell seating
• locating features
• crush / nip
• fit in housing
• oil groove orientation
• correct assembly sequence

Main line:
Poor mounting creates future failure.

Page 8 — Mounting the Thrust Bearing

AXIAL LOAD HAS NO MERCY

Explain:

• pad orientation
• equalizing system
• collar condition
• pivot seating
• correct assembly
• axial direction awareness

Main line:
One wrong pad detail can change load sharing.

Page 9 — Critical Measurements

MEASUREMENTS TELL THE TRUTH

Show:

• shaft journal diameter
• housing bore
• bearing ID
• pad thickness
• thrust collar dimensions
• shaft runout

Main line:
No guessing. Measure everything important.

Page 10 — Clearances

CLEARANCE IS NOT JUST A NUMBER

Explain:

• radial clearance
• diametral clearance
• oil film space
• thrust float / axial clearance
• why too tight or too loose is dangerous

Comic line:
“Too small, I rub. Too big, I dance.”

Page 11 — Contact Checks

BLUE CHECKS DON’T LIE

Explain:

• contact pattern
• blueing checks
• seating verification
• pivot contact
• pad load contact
• how to verify proper support

Main line:
Good contact = good load distribution.

Page 12 — Operating Inspections

WATCH THE MACHINE TALK

Explain routine inspections:

• temperature
• vibration
• axial position
• oil pressure
• oil flow
• drain temperature
• visual leaks
• abnormal noise

Main line:
Machines always speak before they fail.

Page 13 — Visual Inspection During Overhaul

LOOK LIKE A DETECTIVE

Explain what to inspect:

• babbitt wipe
• scratches
• scoring
• fatigue
• discoloration
• corrosion
• cavitation marks
• embedded particles

Main line:
The surface keeps the failure story.

Page 14 — Journal Bearing Failure Modes

WHEN RADIAL SUPPORT GETS ANGRY

Failure modes:

• wipe
• scoring
• overheating
• edge loading
• misalignment distress
• debris damage
• oil starvation
• fatigue

Comic line:
“I support the rotor, but not bad practices.”

Page 15 — Thrust Bearing Failure Modes

AXIAL TROUBLE STARTS HERE

Failure modes:

• thrust pad wipe
• overload
• misalignment
• poor load sharing
• oil film collapse
• collar damage
• temperature distress

Main line:
Thrust failures are often fast and expensive.

Page 16 — Root Causes

THE FAILURE IS THE EFFECT — NOT THE CAUSE

Root causes:

• misalignment
• poor oil quality
• contamination
• wrong clearance
• overload
• assembly mistakes
• unstable rotor behavior
• oil whirl / whip influence
• insufficient oil supply

Main line:
Do not stop at the damage. Find the cause.

Page 17 — Repair or Replace?

CAN THIS BE SAVED?

Explain decision points:

• minor polish?
• re-babbitting?
• scrape correction?
• pad replacement?
• collar repair?
• full replacement?

Comic line:
“Not every damaged bearing is scrap — but not every one is repairable.”

Page 18 — Repair Methods

SMART REPAIR SAVES MACHINES

Explain:

• re-babbitting
• machining
• scraping
• line boring checks
• restoring geometry
• replacing pads
• verifying dimensions after repair

Main line:
A repair is only good if geometry and function return.

Page 19 — Failure Analysis Workflow

HOW KHASH INVESTIGATES

Step-by-step comic investigation:

1. inspect the surface
2. review temperature/vibration data
3. check oil condition
4. verify dimensions
5. review assembly history
6. identify root cause
7. recommend corrective actions

Main line:
Failure analysis is a system investigation — not only a surface opinion.

Page 20 — Final Page

HEALTHY BEARINGS. HEALTHY ROTOR. HEALTHY MACHINE.

Final summary:

• mount right
• measure right
• inspect right
• analyze right
• repair smart

Closing line:
Journal and thrust bearings do not fail randomly. They fail for reasons. Learn the reasons. Protect the machine.

Khash, MLE, CLS, MLA III, MLT II, VIM, VPR

Full 20 pages in pdf, click on the image to read and download in below