GCAA MANAGEMENT WORKSHOP

INCREASED BEARING PERFORMANCE WITH PROPER

SHAFT MOUNT AND SEALS

Why do bearings fail?

A – LubricationContamination

B - Mounting

C - Miscellaneous

D - True Fatigue

Mounting27%

Misc21%

True Fatigue9%

Lubrication andContamination

43%

What Seals Do...• Keep Contaminants Out

• Keep Lubricant In

Minimize Bearing Failures with the Proper Seal

Good Seals Should

• Operate on hardened and ground surface• Not be forced out during relubrication• Be easily removed without bearing disassembly• Be capable of handling the full misalignment

capability of the bearing

Clearance Seals Z-Seal (Rexnord) H-Seal (Link-Belt)

All metal construction High Speed Excellent Abrasion Resistance High Temperature Full Misalignment Capability Low Drag

Basic Seal Types

Z-SEALZ-SEAL H-SEALH-SEAL

Disadvantages Fine materials and

liquids can pass by seal Heavy vibration can

cause metal parts to wear

Light Contact Lip Seals K-Seal (Rexnord)

High Speed Capable Contact Lip Seal Seals against contaminants Very good in Vibratory applications Full Misalignment Capability

Basic Seal Types

K-SEALK-SEAL

Disadvantages Seal lip pressure causes

higher operating temps Temp limit of 250°

because of Buna-N rubber

Chemicals can affect Buna-N

Heavy Contact Single Lip Seal M-Seal (Rexnord) E-Seal (Link-Belt)

Heavy Contact Seal Seals against fine materials and

liquids Great for vertical shafts Full Misalignment Capability

Basic Seal Types

M-SEALM-SEAL E-SEALE-SEAL

Disadvantages Seal lip pressure results

in higher operating temps

Speed is limited Temp limit 250° because

of Buna-N rubber Chemicals can affect

Buna-N rubber

Multi Lip Heavy Contact Seal E7-Seal (Link-Belt)

Heavy Contact Multi Lip Seal Seals in extremely dirty and wet

environments Metal shield to protect rubber Great for vertical shafts Full Misalignment Capability

Basic Seal Types

E7-SEALE7-SEAL

Disadvantages Heavy Seal lip pressure

results in higher operating temps

Speed is very limited Temp limit 250° because

of Buna-N rubber Chemicals can affect

Buna-N rubber

High Temp Heavy Contact Lip Seal M-Seal Viton (Rexnord)

Heavy Contact Seal Seals against fine materials and

liquids Great for vertical shafts Full Misalignment Capability 400° Temp limit Very resistant to Chemicals

Basic Seal Types

M-SEALM-SEAL

Disadvantages Seal lip pressure results

in higher operating temps

Speed is limited

Ultimate Sealing PackageAuxiliary Cap Seals

Auxiliary Cap Seals

• Seals against liquids and gritty contaminants

• Effective against water washdown, taconite, cement, sand, or caking build up

• Safely encloses rotating components

• Protects primary seal • 5 points of protection

Advantages

Why do bearings fail?

A – LubricationContamination

B - Mounting

C - Miscellaneous

D - True Fatigue

Mounting27%

Misc21%

True Fatigue9%

Lubrication andContamination

43%

Shaft Mounting Systems Comparison

SHAFT ATTACHMENTS

Single Set collarSingle Set collar

Most CommonMost Common

Easy to installEasy to install

Most economicalMost economical

Eccentric LockingEccentric Locking

More Holding PowerMore Holding Power

Accommodates for Accommodates for undersize shaftingundersize shafting

EconomicalEconomical

Double Set collarDouble Set collar

Increased shaft Increased shaft holding powerholding power

Increased StabilityIncreased Stability

Moderate costModerate cost

Tapered Adapter MountTapered Adapter Mount

Full 360Full 360° shaft contact° shaft contact

Concentric MountingConcentric Mounting

Best Running AccuracyBest Running Accuracy

Highest Shaft holding powerHighest Shaft holding power

Accommodates undersize shaftingAccommodates undersize shafting

MOST DIFFICULT TO INSTALLMOST DIFFICULT TO INSTALL

Cost vs Performance Shaft Mount Options

Cost

Per

form

ance

High CostGood

Best

Single Set Collar

Eccentric LockGood

Low Cost

Double Set CollarGood

Tapered Adapter

Installation Time

Inst

all T

ime

Less

More

Single Set CollarGood

Double Set CollarGood

Eccentric Lock

Tapered Adapter

Skill Required For Installation

Ski

ll L

evel

Low

High

Single Set Collar

Eccentric LockGood

Double Set Collar

Tapered Adapter

Load and Speed Performance Shaft Mount Options

Speed

Lo

ad

High

LowGood

HighGood

Single Set CollarGood

Eccentric LockGood

Low

Double Set Collar

Tapered Adapter

What if we could simplify and guarantee that your tapered

adapter installation was good every time?

Installation: ZAF makes it easy!

SAF STYLE SPLIT20 steps

~ 45 minutes

ZAF60007 steps

~ 5 minutes

ZAF is factory lubricated, pre-adjusted and shaft ready

CommonInstallation Errors

1. Set clearance2. Component alignment3. Bolt torque4. Contamination

SHŪRLOK Highlights

Break thru Optical Strain Sensing Technology (OSS) For correct installation every time Proprietary Positive Locking System (PLS) Fast install Easy to remove (Built in Puller) Fits entire Rexnord Housing line including the ZAF (SAF style interchange Takes the mystery out of mounting

Break Thru: SpyglassTM OSS Technology

Benefits • Indicates when the mount has been properly tightened

• Signals too loose & too tight

• Two indicators on lock nut to ensure a proper reading

Proprietary: Positive Locking System

AlignmentGroove

Tapered Sleeve

Benefits

• Prevents inner ring fracture in high load & vibratory environments

• Enables industry leading grip on shaft (13,500 lbs on 2 7/16”)

• Mounting is no longer limitation of capacity,

• Enables ease of removal

3 Field interchangeable seal options suits many diverse applications

Spyglass™ Optical Strain Sensing Technology provides error free installation

Rugged one-piece housing decreases installation/removal time by 80% versus SAF models

Roller elements machined to best-in-class tolerance provides longer bearing life

Self aligning spherical roller bearing provides 3 degrees of static and dynamic misalignment

Positive Locking system provides easy installation and removal, even for undersized shafts.

Factory pre-lubricated elements require 80% less lubrication than SAF models - ISO 14000 Friendly!

Factory pre-set clearances reduces installation time by 80%!

Super-finished raceways provide a cool running, quiet, high speed and high load capacity bearing

Hardened Adapter Inner Ring resists fracture under shock and heavy loads

Easy installation: Simply tighten collar until the Spyglass shows this color pattern

Rexnord SHŪRLOK F& B

CHOOSE THE BEST SEAL AND THE BEST SHAFT

MOUNT AND YOU WILL GET LONGER BEARING