agma 922-a96 - load classification and service factors for flexible coupling-2

8/15/2019 AGMA 922-A96 - Load Classification and Service Factors for Flexible Coupling-2

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MERI N

GE R M NUF TURERS

SSO I TION

o d lassification nd Service

actors for lexible ouplings

AGMA INFORMATION SHEET

This Information Sheet is NOT an AGMA Standard


2/16

Load lassification n Service Factors

for

Flexible ouplings

AGMA 922 A96

American

Gear

Manufacturers

CAUTION NOTICE: AGMA technical publications are subject to constant improvement

Association

revision or withdrawal as dictated by experience. Any person who refers to any AGMA

technical publication should be sure that the publication is the latest available from the As-

sociation on the subject matter.

[fables or other self supporting sections may be quoted or extracted in their entirety.

Credit lines should read: extracted from AGMA 922 A96

Load lassification n Service

Factors for Flexible ouplings

with the permission of the publisher the American Gear

Manufacturers Association 1500 King Street Suite 201 Alexandria Virginia 22314.]

Approved September 18 1996

ABSTRACT

This information sheet provides suggested load classifications and related service factors that are most fre-

quently used for various flexible coupling applications. Typical applications using smooth prime movers are

listed. Special considerations which may involve unusual or severe loading are also discussed.

Published by

American Gear Manufacturers Association

1500

King

Street Suite 201 Alexandria

Virginia

22314

Copyright

1996 by American Gear Manufacturers Association

All rights reserved.

No part of this publication may be reproduced in any form in an electronic

retrieval system or otherwise without prior written permission of the publisher.

Printed in the United States of America

ISBN: 1 55589 68 4

ii


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AGMA 922 A96

ontents

Page

Foreword v

1 Scope

2 References

3 Responsibility

4 Load classification

5 Service factors 6

ables

1 Load classification and service factors 2

2 Load classifications and typical service factors for flexible coupling

applications 2

iii


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AGMA922 A96

iv

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5/16

orewor

[The foreword is provided for informational purposes only and should not be construed as a

part of AGMA 922 A96 Load lassification and Service Factors for Flexible ouplings ]

This document was developed originally as standard AGMA 514.01 by the Flexible

Coupling Product Group of AGMA to show some of the applications for flexible couplings

and to serve as a guide to the character ofthe loads found inthese applications. Itmade no

attempt to include all possible applications for flexible couplings but a sufficient number and

variety were covered to serve as a guide for proper application.

The load classif ication and service factors shown in this document vary for some types of

equipment from identical or similar equipment as shown in other AGMA Standards. Such

variations are not errors or discrepancies but have been determined based on design

construction and limitations of the flexible coupling.

The first draft of AGMA 514.01 was prepared by the Flexible Coupling Technical Committee

in January 1968. It was approved by Flexible Coupling Product Group 7 on October 20

1968. AGMA514.01 became an official AGMAstandard on May 27 1969. AGMA514.02

was a revision of AGMA 514.01. The major change was the addition of Service Factors to

table 2. AGMA 514.02 was approved by the AGMA Membership on October 22 1971.

The Flexible Couplings Committee voted to change the standard to an information sheet.

The only changes made were editorial necessary to reflect an information sheet.

Suggestions for the improvement ofthis information sheet will be welcome. They should be

sent to the American Gear Manufacturers Association 1500 King Street Suite 201

Alexandria Virginia 22314.

AGMA 9 A96


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GM 9 A96

vi

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blank


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AGMA

9 A96

PERSONNEL of the GM Flexible Couplings Committee

Chairman: Donald B. Cutler Rexnord Corporation

Vice Chairman: Glenn Pokrandt The Falk Corporation

CTIVE MEM ERS

T.G. Fromknecht Zurn Industries Inc.

J.R. Mancuso Kop Flex Inc.

J.D. Tennies Renold Inc.

R.G. Thompson Deck Manufacturing Corporation

SSOCI TE MEM ERS

S. Chen Kop Flex Inc.

Dixon Metal Improvement Company

T. Hewitt . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . Rexnord Corporation

D.W. Hindman Rexnord Corporation

V. Ivers Xtek Inc.

E.C. Kus Deck Manufacturing Corporation

D. Lindsay Emerson Power Transmission

J.W. Mahan Lovejoy Inc.

J.D. Mays Rexnord Corporation

R.E. Munyon Kop Flex Inc.

J. Paluh Zurn Industries Inc.

S.L. Pearson Mobil Oil Corporation

A. E. Phillips Dodge/Rockwell Automation

W. Pizzichil Philadelphia Gear Corporation

R. Post Renold Inc.

D. Reynolds Dodge/Rockwell Automation

E.I. Rivin Wayne State University

T.M. Schatzka Lovejoy Inc.

J.F. Slusarick Huffman Corporation

R. Whitney Emerson Power Transmission

vii


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AGMA 922 A96

viii

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AMERICAN GEAR MANUFACTURERS ASSOCIATION

American Gear Manufacturers

Association -

Load Classification and

Service Factors for

Flexible Couplings

1 Scope

The p ur po se of this i nf or mati on s he et is to list and

classify the character of the load, and the suggested

service factor for various applications, so that proper

f le xible cou plin g selection can be made for a given

service.

1.1

Applicability

This i nfor mation s hee t is a ppl ica bl e to s tandar d

couplings as defined in AGMA 510.03.

1.2 Exceptions

Itis recognized that there are couplings for which the

service factor values shown in this information sheet

are not necessarily applicable. For specific applica

tion information, refer to the manufacturer s catalog

or recommendations.

AGMA

acknowledges the

right of any manufacturer to use different selection

methods, or service factors, or both for their specific

product.

2 References

The following documents contain provisions which,

through reference in this text, constitute provisions of

the information sheet. At the time of publication, the

e ditions were valid. All p ub lica tion s are sub je ct to

revision, and the users of this information sheet are

encouraged to investigate the possibility of applying

the most recent editions of the publications listed.

AGMA 510.03, Nomenclature for Flexible Cou-

plings 1984 .

AGMA 9 A96

3 Responsibil ity

3.1

Applications

The manufacturer s published warranty applies to

the flexible couplings described in this publication.

The following conditions are typical and are beyond

the manufacturer s responsibility.

The flexible coupling is protected as pre

scrib ed by the m an ufactu re r, in e ithe r insid e or

outside storage, between the interval of its receipt

by the buyer and actual installation;

The fl exi ble c oupl ing is pr oper ly i nstall ed

and maintained in accordance with the

manufacturer s instructions;

The system of connected rotating parts is

compatible, free from critical speed, torsional and

other type vibration within the specified operating

speed range, no matter how induced;

The imposed torsional load, speed and

m is al ign men t are within the c apa ci ty limits for

which the units were sold, or as speci fi ed in the

purchase contract.

3.2 Systems analysis

R espo nsib il ity for syste m a na lysis in com plia nce

with these requirements rests with the purchaser of

the flexible coupling.

3.3 Exceptions

Excep tion s to any of the foreg oing p ro vision s are a

matter of specific contractual agreements.

NOTE: Service factors and loadclassifications for any

equipment used to

move

or convey

people

is beyond

the intent of this information sheet. Consult the

manufacturer for recommendations.

4 Load classification

The broad categories of load classification are

sho wn in tab le T he y are class ifi ed in the t hr ee

com mo nly recog nize d load cla sses: U nifo rm U),

M od erate Sho ck M), and H ea vy Sho ck H). The se

load classifications are based on normal operation of

the drive s ys te m. Load class ifi cation for v ar io us

applications are given in table 2.


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AGMA9 A96

Table 1 - Load classification and service factors

Load classification

Normal service

factor

range

Uniform U

1.0 - 1.5

Moderate Shock M 1.5 - 2.5

Heavy Shock H

2.5 and over

NOTE:

1

The range of values signifies increasing reliability, longer life or more severe duty requirements.

See 5.1.

Table 2 - Load classifications and typical service factors

fo r

flexible

coupling

applications

Load classification Typical service factor

Application

see 5.1 and table 1

see 5.2

Agitators

Pure liquids U

1.00

Liquids and solids U 1.25

Liquids - variable density

U

1.25

Blowers

Centrifugal

U

1.00

Lobe U

1.50

Vane U

1.25

Brewing

and

distilling

Bottling machinery U

1.00

Lauter tub U

1.25

Briquetter machines

M

2.00

Can

filling

machines

U

1.00

Cane knives

M 2.00

Car dumpers

M

2.50

Car pullers -

intermittent duty

U

1.50

Clay

working

machinery

M

1.75

Compressors

Centrifugal

U

1.25

Lobe

U

1.50

Reciprocating - multi-cylinder

M

2.00

Conveyors

-

uniformly loaded or fed

Apron

U

1.25

Assembly

U

1.00

Belt

U

1.00

Bucket

U

1.25

Chain

U

1.25

Flight U

1.25

Oven U

1.50

Screw U

1.25

Conveyors

-

heavy duty not uniformly fed

Apron

M 1.50

Assembly

U

1.25

Belt

U

1.25

Bucket

U

1.50

Chain

U

1.50

Flight

U

1.50

Oven

U

1.50

continued

2


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Table 2 continued

AGMA 9 A96

Load classification

Typical service factor

Application

see 5.1 and table 1

see 5.2

Conveyors -

heavy duty continued

Reciprocating

M

2.50

Screw

M

1.50

Shaker

H

2.50

Cranes and hoists

Main hoists

M

2.00

Reversing

M

2.00

Skip hoists

M

1.75

Trolley drive

M

1.75

Bridge drive

M

1.75

Slope

M

1.50

Crushers

Ore

H

2.75

Stone

H

2.75

Dredges

Cable reels

M

1.75

Conveyors

U

1.50

Cutter head drives

M

2.25

Jig drives

M

2.25

Maneuvering winches

M

1.75

Pumps

M

1.75

Screen drive

M

1.75

Stackers

M

1.75

Utility winches

M

1.50

Elevators

Bucket

M

1.75

Centrifugal discharge

M

1.50

Freight

M

2.00

Gravity discharge U 1.50

Fans

Centrifugal

U

1.00

Cooling towers

M

2.00

Forced draft

U

1.50

Induced draft without damper control

M

2.00

Feeders

Apron

U

1.25

Belt

U

1.25

Disc

U

1.25

Reciprocating

H

2.50

Screw

U

1.25

Food industry

Beet slicer

M

1.75

Cereal cooker U 1.25

Dough mixer

M

1.75

Meat grinders

M

1.75

Bottling, can filling machine

U

1.00

Generators

not welding

U

1.00

Hammer mills

M

2.00

Laundry washers

Reversing

M

2.00

Laundry tumblers

M

2.00

continued

3


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AGMA9 A96

Table 2 continued

Load classification


Application

see 5.1 and table 1)

see 5.2)

Lumber

industry

Barkers - drum type

M

2.00

Edger feed

M

2.00

Live rolls

M

2.00

Log haul - incline

M

2.00

Log haul - well type

M

2.00

Off bearing rolls

M

2.00

Planer feed chains

M

1.75

Planer floor chains

M

1.75

Planer tilting hoist

M

1.75

Slab conveyor

M

1.50

Sorting table

1.50

Trimmer feed

M

1.75

Machine tools

Bending roll M 2.00

Plate planer

M

1.50

Punch press - gear driven

M

2.00

Tapping machines

M

2.50

Other machine tools

Main drives

M

1.50

Auxiliary drives

1.25

Metal mills

Draw bench - carriage

M

2.00

Draw bench - main drive

M

2.00

Forming machines

M

2.00

Slitters

1.50

Table conveyors

Non-reversing

M

2.25

Reversing

H

2.50

Wire drawing flattening machine

M

2.00

Wire winding machine

M

1.75

Mills, rotary type

Ball

M

2.25

Cement kilns

M

2.00

Dryers coolers

M

2.00

Kilns

M

2.00

Pebble

M

2.00

Rod

M

2.00

Tumbling barrels

M

2.00

Mixers

Concrete mixers

M

1.75

Drum type

M

1.50

Oil

industry

Chillers

1.25

Oil well pumping

M

2.00

Paraffin filter press

M

1.75

Rotary kilns

M

2.00

Paper mills

Barker auxiliaries, hydraulic

M

2.00

Barker, mechanical

M

2.00

Barking drum spur gear only)

M

2.25

Beater pulper

M

1.75

continued


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Table 2 continued

AGMA 9 A96

Load classification


Application

see 5.1 and table 1)

ee 5.2)

Paper

mills

continued

Bleacher

U

1.00

Calenders

M

2.00

Converting machines, except cutlers, platers

U

1.50

Couch

M

1.75

Cutlers, platers

M

2.00

Cylinders

M

1.75

Dryers

M

1.75

Felt stretcher

U

1.25

Felt whipper

M

2.00

Jordans

M

1.75

Log haul

M

2.00

Presses

M

2.00

Reel

U

1.50

Stock chests

U

1.50

Suction roll

M

1.75

Washers and thickeners

U

1.50

Winders

M

1.50

Printing presses

M

1.50

Pullers

Barge haul

M

2.00

Pumps

Centrifugal

U

1.00

Reciprocating

Double acting

M

2.00

Single acting

1 or 2 cyl inders

M

2.25

3 or more cyl inders

M

1.75

Rotary - gear, lobe, vane

U

1.50

Rubber industry

Mixer - Banbury

M

2.50

Rubber calender

M

2.00

Rubber mill 2 or more)

M

2.25

Sheeter

M

2.00

Tire building machines

M

2.50

Tire tube press openers

U

1.00

Tubers and strainers

M

2.00

Screens

Air washing

U

1.00

Rotary - s tone or gravel

M

1.50

Travel water intake

U

1.25

Sewage disposal equipment

Bar screens

U

1.25

Chemical feeders

U

1.25

Collectors, circular or straight line

U

1.25

Dewatering screens

U

1.25

Grit collectors

U

1.25

Scum breakers

U

1.25

Slow or rapid mixers

U

1.25

Sludge collectors

U

1.25

Thickeners

U

1.25

Vacuum filters

U

1.25

continued


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AGMA9 A96

Table 2 concluded

Load classification


Application

see 5.1 and table 1 see 5.2

Steering gear U 1.00

Stokers

U

1.00

Textile industry

Batchers

U

1.25

Calenders

M

1.75

Card machines

M

1.50

Cloth finishing machines

washers, pads, tenters) U

1.50

dryers, calenders, etc.) M

1.75

Dry cans

Dryers M

1.50

Dyeing machinery U

1.25

Looms

M

1.50

Mangles U

1.25

Nappers U 1.25

Soapers U 1.25

Spinners

M

1.50

Tenter frames U

1.50

Winders other than batchers)

M

1.50

Windlass M

1.75

5 Service factors

Normal service factor range for each load

classification, table 1,is given as a range ofvalues to

indicate the scope of the load classification

designation and in recognition that different types of

flexible couplings may be affected differently by

loading. It is recognized that precise definition of

load classification cannot be made for many

applications, as evidenced by the listing of the

service factor value 1.5 in both the Uniform and

Moderate Shock classifications, and the service

factor value 2.5 in both the Moderate Shock and

Heavy Shock classifications. Selection of a service

factor value within - or beyond - the range should be

based upon the degree of reliability desired or upon

how the specific system may differ from normal or

average conditions for the type of application.

5.1 Typical applications

The service factors listed in tables 1 and 2 are

intended as a general guide for applications with

smooth prime movers such as electric or hydraulic

motors and steam turbines.

Service factors listed in table 2 are the values most

frequently used for the various applications listed.

They are based on normal operation of the drive

system. Higher or lower values may be used

6

depending upon the degree of reliability desired or

upon how the specific system may differ from

normal or average conditions for the type

application.

5.2 Special applications

Service factors listed in tables 1 and 2 represent the

normal relationship between flexible coupling design

power rating and prime mover continuous power

rating as listed on its nameplate. Applications

involving unusual or severe loading should be

carefully reviewed with the coupling manufacturer

before a service factor is applied.

5.2.1 Shock loading

Applications with high-torque motors and motors for

intermittent operations, and applications where

extreme repetitive shock occurs or where high

energy loads must be absorbed, as when stalling,

require special considerations and may not be

covered by the load classifications or service factors

given in tables 1 and 2.

5.2.2 Systems with brakes

When prime movers are equipped with brakes, and

the torque rating of the brakes exceeds the rating of

the prime mover, the rating of the brake dictates the

selection of the flexible coupling.


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PUBLISHED BY

AMERICAN GEAR MANUFACTURERS ASSOCIATION

15 KING STREET ALEXANDRIA VIRGINIA 22314

agma 922-a96 - load classification and service factors for flexible coupling-2

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