continental conveyor - belt conveyor pulleys catalogue

~~

of their choice, be it the CXTB, Dodge "taperlock" or a.D.

The pulleys described herein are those meetingstandard specifications. They are by no meansa limit to Continental's abilities in the enginee-red class applications as custom pulleys aredesigned and fabricated to meet customersindividual requirements whenever necessary.

VIEWS BELOW SHOW MANUFACTURING AND ASSEMBLY AREA

Continental Conveyor & Machine Workslimited have been manufacturing bulk materialhandling equipment to both CEMA and customspecifications in their Thetford Mines plantsince 1963. The fully equipped, modernfabricating and machining facilities lend them-selves well to the production of high quality,precision engineered products to serve the bulkmaterial handling requirements of today's indus-

try.

This catalogue is designed to aid the conveyorpulley user in selecting the proper pulley fortheir particular application while at the sametime allowing the flexibility of the hub system

Above are several views of the manufacturingprocess of a crowned faced pulley. Initially, thesteel rim is rolled to a concentric circle in crownfacing rolls specially constructed for the pro-duction of conveyor pulleys.

discs are welded to the interior of the rim.Following this operation, the end discs aremounted using a shaft with a continual keywayto assure perfect aligment of the bushing

keyways.

The entire assembly is then hydraulically drawntogether and welded to form a concentric drum.In the final welding operation, the pulley isplaced on a special machine that turns thepulley at a precise speed, depending on thediameter, to ensure a perfect, high penetrationweld between end disc and rim.

The pulley is then meticulously checked andverified to CEMA specifications prior to shippingto ensure complete customer satisfaction.

Following this operation, end discs are precisionflame cut on a specially constructed cuttingmachine. To assure perfect concentricity, thehub is first mounted in the end disc where uponthe entire assembly is then cut to the requireddiameter. This process assures a negligeabledeviation in diameter and thus a more concen-tric conveyor pulley.

Large intermediate and center discs are used onall conveyor pulleys with the exception of thosehaving small diameters and face widths.These

3

Continental welded steel conveyor pulleys are availa~ble with CXTB, DODGE "taper lock" or O.D. hubs.

DETAILS BELOW SHOW DIFFERENCES IN CONSTRUCTION DEPENDING ONHUB SYSTEM.

CONTINENTAL O.D. HUBSQ. D. BUSHINGSplit cast iron type with 3/4" taperper foot. Shaft keyed to bushing,bushing not keyed to pulley hub,torque transmitted through selflocking taper.

CONTINENTAL CXTH HUBS

CXTB BUSHINGSplit taper of either malleable orcast iron type, 2" taper per foot.Shaft keyed to bushing, bushingnot keyed to pulley hub. Torquetransmitted through bolts.

DODGE "TAPER LOCK"

Split taper cast iron bushing 80taper per foot. Shaft keyed tobushing, bushing not keyed topulley hub. Torque transmittedthrough bolts.

~UB NO. CK-25

CK-30CK-35CK-40CK-45CK.50CK-60CK-70CK-80CK-l00

BUSHIN~NO.25'i7

30203535404045455050605070608065

10085

.~BORE~ ~~NG~ I1/2" to 2.1/2" dia.7/S" to 3" dia.1.3/16" to 3.1/2" dia.1.7/16" to 4" dia.1.15/16" to 4.1/2" dia.2.7/16" to 5" dia.3.7/16" to 6" dia.3-15/16" to 7" dia.4.7/16"toS"dia.7" to 1 0" dia.

p Q

1-3/4':Z"3-1/Z"4"4-1/Z"5"5"6"6-1/Z"8-1/Z"

R*

1/8"3/8"1-1/8"1-1/2"1-7/8"2-1/4"2-5/8"2-5/8"2-5/8"

1"1"1"1"1"1"2-1/4"2-1/4"2-1/4"2-1/4"

.Minimum space required from pulley rim to loosen bushing using screws as jack screws. no

puller required.

4

CONTINENTAL DODGE HUBS

Continental welded steelCXTB hubs and bushings.

withconveyor

The 2" per foot taper of the CXT provide a 12 to 1 locking ratio on the shaft. Theadvantages of the CXT system are its high lateral holding power and its minimuzation ofend disc prestressing. Most torque however is transmitted through the bushing flangeand cap screws.

[~~

,.-

~c

~lY

.Key furnished for these sizes only

BUSHING SPECIFICATIONS

HUB AND CORRESPONDING BUSHING HUB BOLT TORGUE

HUB BUSHING HUB BUSHING ii

CXTB50ICXTB60

CXTB70CXTB80CXTB100

HUB

CXTH25CXTH30CXTH35CXTH40CXTH45

in. Ibs.

350550840

12001680

HUB In.lbs.

30004800720090009000


CXTB25CXTB30CXTB35CXTB40CXTB45

CXTH50CXTH60CXTH70CXTH80CXTH10G


,J5

~~-juL

BUSHING AND KEYSEAT DIMENSIONS

Continental welded steel conveyor pulleys with a.D.hubs and bushings.

,-

The 3/4" per foot taper of the 0.0. provides a 32 to 1 locking ratio on the shaft. Theadvantages of the 0.0. system are its superior holding power in both lateral and tor-sional directions, its ease of assembly and disassembly and its self locking taper. Thelarge CJp screws provide enough force to lock the taper so that no external keys arerequired between mating sections.

~ul-BUSHING AND KEYSEAT DIMENSIONS


HUB

CHKCHECHF

CHJCHM

in. Ibs.

156075

135225

HUB

CHNCHPCHW

CHS

In. IDS.

300450600750

6

The 1-1/2" per foot taper of the "taper lock" provides a 16 to 1 locking ratio on theshaft. The advantages of the Dodge system are its availability, its superior torsionalholding power when using a key and its greater load rating due to the small inset that isrequired.

L~~

"

BUSHING AND KEYSEAT DIMENSIONS

.Key furnished for these sizes only.


HUBANDCORRESPONDING BUSHING HUB BOLTTOROUE

HUB

~CKCK

CK

CK

ft.lbs.

366784

142205

HUB

CK 50CK 60CK 70

CK 80

CK 100

ft. Ibs.

258652652652

1142

)./

7

2530354045

APPROXIMATE WEIGHTS IN POUNDS

PUllEY' I ContinentalDIA. HUB

DODGEHUB

CK-25CK-JOCK-J5

n.D.HUB--tHK.tHE

CHK.tHEtHF

tHK.tHEtHF

CHK.tHEtHF

FACE WIDTHS IN INCHES26 30 32 36 38 46

139143158

168172181185

51

~5i. 155 165

182186195199

54

158

162172

190194

203207

57

165169179

198202211215

60 63 66

CXTH 25CXTH 30

CXTH 35

12 14 1& 18

47 50 53 5751 54 57 6160 63 6& 70

20 22 24

61 65 68165 69 72

74 78 81

828695

858998

103101116120

123121135181

9296

105

111115174128

132136144194

40 44

95 121 T32102 131 136108 135 145

10

CXTH 25CXTH 30CXTH 35CXTH 40

CK-25CK-30CK-35CK-40




CK-25


CK-25CK-30CK-35CK-40CK-50CK-60

51 62 6661 66 1069 14 1814 18 83

70748287

78829196

9195

104110

122126135140

74788691

838796

101 i

97101

;10116

130134143148

78829095

8892

101108

102106115121

138142151156

158162171176197

198202210215236282

297301317342371417!

82869499

9397

106111

1081121211271

75 I79 I88 !

90 9994 103

103 112107 116

115119128132

131141149200

146150159163

157161170174

188192200220

12


64687782 i

75798894

97101110115

69738287

80849399

106110119124

108112120127

127131140145

118122130174

139143152157

175179187207

204 2201 230 208 224 234

216 232 242238 254 264

240244252274

280284292302

i..78

I8792

869099

105

114118127132

14



144 155 161 203 218 239 258 269148 159 165 207 222 243 262 273157 165 174 t16 231 251 270 281162 173.179 227 242 261 280 291

291295JOJJIJ

302306314324

340352356360

326330338347

369381384388

16

CHK.CHECHF

CHK.CHECHFCHM

CHK.CHECHFCHM.CHK.CHECHFCHM.

14tiI150

1591164

1681172182186207

209213220225246292

314318324359379425

lBB192201205

217,221230234255

196200209213

226230239243264

212216225229

245249258262283

221225234238

254260267271292

229233242246

258268276280301

245249258262

276286294298319

346350360364443489

561566571575588634

817867886930

10391321

10871092113712451667

15061508,1

16101950

18

CXTH 25CXTH 30CXTH 35CXTH 40CXTH 50

113117126131152

146150155160

122126135140161

156160166171

140144153158179

149153162167188

188192199204225271

2802843001325360406

290 303 315 327294 307 319 339302 315 317 343306 319 321 347

329 342 356 368 382 417339 352 366 378 392 427347 360 374 388 402 437351 364 378 392 406 440372 385 399 413 427 461

20

CXTH 25CXTH 30CXTH 35CXTH 40CXTH 50CXTH 60

111181188193214260

263261283308343389

249253262266286332

399403419423436482

281285295299319365

450454470474487533

302306316320340386

484488504508521567

313317327331351397

500504520524537583

324328338342416462

527532537541554600

412416428431519565'

m783789793811851

95010401058110012021484

13031311135314561928

2082208421782276

428432445448540586

!

8061813 !819823841887

986110761094113612381520

13481354139617971985

2147214922432341

4431447,

4611464

560:

6061

835

8421

849853871

917

1021

1113

1131 i

1173 !

1275

1557

1390

1397

1439

1854

2042

22122214

2308

2406

459477480580676722

86187918831901 i

919!965

10571149116712091311 I

1593

1432143914811911

2099

2277227923732471

41514931496;600696142

892910914932950996

10931185120312451341162!1

14151482152419682156

2342234424382536

523541544651747793

98310011005102110391085

112812211326136714621744

16311644168521592342

2593259526822774

24


CK-25CK-JOCK-J5CK-40CK-50CK-60

213217233258278324

229233249274294340

246250266291326372

30

CK-35CK-40CK-50CK-60CK-70CK-80

CK-40CK-50CK-60CK-70CK-80


CHECHFCHM.CHPCHW

CHfCHM.CHPCHW


327 347 367 387 407 427 446 551 591 611 651 671392 415 440 464 488 512 537 649 698 722 771 795413 436 461 485 509 533 558 668 717 741 790 814

507 531 555 579 604 712 761 785 834 858646 670 694 719 821 870 894 943, 967828 952 976 1001 1103 1152 1176 122511249

744819838882991

1273

10301035108011881591

1442144315451863

36

597602649763

1045

854899

625630677791

1083

887932

1042

6~4659106820

1121

919964

10141300

6806811

I

134[848

1159

952991

11011313

830835880988

1326

1174121613181561

887892937

10451402

1239128113831647

915921966

10141440

1272131414161690

972978

102311311515

1376137814801777

9991006

105111591553

1409141115131820

CXTH 40CXTH 50CXTH 60CXTH 70CXTH 80


42

CHM.CHPCHW

48

.INDICATES THAT NEXT LARGER SIZE HUB AND BUSHING IS USED

When ordering shafting, please specify the followinginformation and if possible include a sketch similar tothe one appearing below. This additional data willhelp elliminate errors.

') Diameter and length.2) Number and sizes of keyway required.3) Shaft length on either side of the pulley, mea-

sured from the edge of rim.4) Diameter and length of journal if required.

Please note that excessive shaft deflection is the maincause of pulley failure. It is therefore recommendedthat one be generous when selecting shaft sizes. It isalso important to remember that while alloy steelincreases shaft strength, it should not be used to decrea-se shaft diameter.

The shafting specified for use with Continental con-veyor pulleys is AISI 1045, a high carbon steel with atensile strength of approximately 105,000 Ibs. persquare inch. This material is particularly well suitedfor applications requiring high grade transmission asthe carbon content makes it one of the strongest steelsin the carbon range (excluding alloy steels) and itmachines to an extremely smooth finish.

8

172176185189

199203212216237

270274282286

306316324328349

385389401404485531

72673273874276\1806

890

980998

104011421424

12341240128213851833

1974197620702168

131135144149170

1671171

1771182203249

270274284288308354

433437453457465511

FOR DETERMINING PULLEY AND SHAFT SPECIFICATIONS(Drive and Non-Drive Pulleys)

This quick reference source will enable the reader to select the right pulley and shaftfor a conveyor system. It has been prepared and used by experienced pulley engineers whoknow the importance of preventing conveyor breakdown by properly matching pulleys andshafts to the system.

zontally in the shaft size column. We followthis procedure for each pulley.

7. Next, we divide Tl and T3 by the belt width.This gives us PIW for both the Drive {Tv andNon-Drive (T 3) Pulleys.

Then using Table VII, we select a pulleydiameter with an allowable PIW greaterthan our computed PIW for each pulley.

8. Using Table VIII we again select pulleydiameter by finding a diameter with max-imum shaft size as large or larger thanour computed shaft size, doing this foreach pulley.

9. Select the larger of the two diameters foundin procedure 7 and 8 for each pulley.

EXAMPLE

1. From Table I: 100 H.P. @ 300 F.P.M.=ll,OOO#100 x 33,000(Te). Also 300 -= 11,000#.

1. Find the appropriate Horsepower coll:Jmn onTable I. Look down F.P.M. (Feet Per Minute)column until belt speed of conveyor cor-responds. Read across to Horsepower col-umn. This number is T e (Effective Tension)of conveyor system. Also Te = HP x 33,000

F.P.M.

2. Find the appropriate K factor from TableII. The K factor has to do with the type ofdrive and take-up of the conveyor system.Take this K factor x (times) T e. This is T 2 orT J (Slack Side Tension) for the conveyor sys-tem. T 2 is associated with the Drive Pulley,and T J is associated with the Non-Drive

Pulley(s).

3. For Non-Drive Pulley(s), determine the arcin degrees the belt contacts each pulley.Then using Table III for each Non-Drive

Pulley, determine the individual factor foreach. Take this factor times T J. This givesthe resultant load for each Non-Drive

Pulley.

4. For Drive Pulley, add T 2 and Te. Thisequals T 1 (Tight Side Tension) for the DrivePulley. Then divide T 1 by T 2' This equalsratio for Table IV. Determine the arc of con-tact the belt makes with the Drive Pulley.Read down the Ratio Column until corres-ponding ratio is found; thE:n go across toArc of Contact Column. Take this newfactor times T 2. This gives resultant loadfor the Drive Pulley.

5. From Table V find the desired belt width.Recommended pulley width is given incorresponding column.

6. To determine shaft size, use Table VI (a),or VI (b), (allowable shaft load). The tableis computed for Non-Drive Pulleys, (shaftswith 8000 psi allowable bending stress).For Drive Pulleys, we multiply allowableload column by 0.75. In effect, this allows6000 psi stress for Drive Pulleys.Still using Table VI (a or b), we take thebearing centers of the pulley and subtractthe face width. This number is used in the"Bearing Centers-(Minus) Face" columns.Next, using the resultant load we go downthe "Bearing Centers-(Minus) Face" col-umn until the value for allowable load isgreater than our computed resultant load.The corresponding shaft is listed hori-

2. From Table II: Snubbed Drive, Lagged Drive,Automatic Take-up, K Factor = 0.38. 0.38 x11,000# = 4180# (T 2 or T 3).

3. The Non-Drive Pulleys have the following de-grees of wr?p:

Snub: 30. Bend No.1: go.

Tail: 180. Bend No.2: 90.

Take-up: 180.

9

KNOWN:

100 Horsepower 2100 wrap on head e

300 F.P.M. 42" Belt

Head Drive 60" Bearing Centers

Lagged Head Pulley Browning or O.D.

Automatic Take-up Hubs

TO FIND:

T 1, T 2 and T 3

Resultant Load for each Pulley

Shaft Size for each Pulley

Width of Pulleys

Diameter for each Pulley

7. T1 = 15,180# (15,180# -7 42" = 361 Ib./in.)T3 = 4,180# ( 4,180# + 42" = 100 Ib./in.)Using Table VII, we need a 30" Pulley for theDrive and 6" for the Non-Drive.

8. By using Table VIII and maximum shaft sizes,we see we need a 24" pulley for the Drive, 14"for the Tail and Take-up; 10" for the Bends, and6" for the Snub.

From Table III, the Bend Pulleys have a factorof 1.41422. 418Q# x 1.41422 = 5911#. This isthe resultant load for the Bend Pulleys.

Also from Table III, factor for the Tail andTake-up Pulleys is 2.00000. Therefore, 2.00000x 4180# = 8360# (resultant). The Snub Pul-ley has a factor of 0.51764. 4180# x 0.51764 =2164# (resultant).

4. For the Drive Pulley, Te + T2=15,180# (TJ.T 1 -:- T 2 = 3.63 (ratio). From Table IV using210. wrap column and 3.63 ratio, we get a newfactor of 4.5238 by interpolation. Then take4.5238 x 4180# = 18,909# (resultant).

9:. Therefore, we would select a 30" Drive (whenttlere is a choice of diameters, always use thelargest), 14" Tail and Take-up, 6" Snub and10" Bends.

NOTE: It is also important to examine the belt

manufacturer's recommendations for pulley di-ameters. Even though the Continental Pulley is

designed to support these loads, the belt manu-

facturer may require a larger diameter pulley to

lessen the belt bending factor imposed by the

smaller pulley. If their recommendations are

higher for pulley diameter, their recommendations

should be followed to prevent belt damage. In

this instance if a belt rated at 440 pounds per

inch of width were to be used, the manufacturer

would suggest minimums as follows: 30" for Head,

18" Tail, etc.

5. Since we have a 42" belt we can see from therecommended pulley width in Table V that we

should use a 44" wide pulley.

6. We have a distance of 16" for bearing centersminus face (60 -44 = 16). With a load of 5911#

for the Bend Pulleys, Table VilA) indicates a3-15/16" shaft is needed

The Snub Pulley has a resultant of 2164# (16"bearing centers minus face). Use a 27-{6"shaft.

.The Tail and Take-up have resultants of 8360#;therefore, 4-7/16" are selected.

We use a factor of 0.75 for designing the DrivePulley shaft to 6000 psi. We divide the result-ant by this factor. 18,909 -7- 0.75 = 25,212. A6" shaft with bearing centers minus face of 16"has a load rating of 27697 which is the smallest

available without dropping below this 25,212.

PULLEY

SCHEMATIC FOR TYPICAL CONVEYORSYSTEM/ PULLEY DIMENSIONAL SYMBOLS

10

FACTOR IIK11

NOTE: For wet belts and smooth lagging, use bare pulley factor.For wet belts and grooved lagging, use lagged pulley factor.If arc of contact is unknown, assume the following: Type of drive

PlainSnubbed

TAB L E Dual or tandem

Assumed arc of contact180021003800

RESULTANT LOAD FACTOR-NON-DRIVENOTE: R = T 3 X Factor

11

13

2 4 ;

SHAFT

LOADS

NOTE: Above tension ratings may be used for any arc of belt contact.

T!~MA.

TABLE

VI b

1. Diameter and Face Width

2. Crown and Type of Pulley (wing or

3. Unlagged or Lagged (type lagging)

4. Shaft Diameter (if specified)

5. Hub Size and Type

6. Bearing Centers

7. Belt Width

8. Position of Pulley in the Conveyor

9. Arc of Contact

DATA REQUIRED TO DETERMINE PULLEY SPECIFICATIONS

12

TABLE VlSHAFT SIZES

~-BEARING CENl

I'4 16

--PULLEY DIAME1ER

I, ES)

III

TAPER-LOCK (i)H U B S

or Elevator

1302

1802309251567749

10872

1490318283245633027237809

46504564386512577307909210604:

10. T)o T, or T, (if not

(A) Type of Ti .--

(B) Drive Pulley ~ -, .--

(C) Drive Pulley Arc ot

1D) F.P.M.'

(E) I

-PUI

(2) Center to center distance

(3) Lift in feet

-DIAME1E.HES}

-iorsepower (if not known, give the following)

30

--MAXIMUM BELf ENS ION

(POU~ DS-P.I.W.)

give the foil

c \, or gravity)

or Un lagged

Contact

32 3: 36

MINUS) LACE

'/0 '/2

(1) T.P.H.

LE Vi.BELT

TE/\fSION

Continental welded steel wing type self cleaning con-veyor and elevator pulleys.

( Continental Conveyor Wing Pulleys are ruggedly constructed with a heavy centertube taking the direct load from the wing plates and transmitting this load throughhubs to the shaft. The sloping wing plates automatically shed the material to eachside of the pulley thus preventing build-up on the pulley face which can cause con-siderable damage to the belt, Welded steel wing type pulleys are recommended fortail shafts of belt conveyors and the boot shaft of bucket elevators.

DODGE "TAPER LOCK"CXT AND C.D.

TYPE HUB AND r ~- FACE ~ --l TYPE HUB AND

BUSHING i BUSHING

l .i'\'\""

B~I

DIA.

~I-

p

CONTINENTAL 0.0. HUBSQ. D. BUSHINGSplit cast iron type with 3/4" taperper foot. Shaft keyed to bushing,bushing not keyed to pulley hub,torque transmitted through selflocking taper.

HUB BUSHING

NO. NO.CH-K SK Ill"" 10 2-1/2" dia. 3/4" 1.7/S" 1-5/8"

CH.E E 7/8" 10 3.7/16.' dia. 118" 2-5/S" 2-5/16"CH-F F 1" 10 3-15/16" dia. 15/16" 3-5/S" 3-1/4"CH-J J 1-7/16" 10 4-1/2" dia. 1-1/16" 41/2" 4"CH-M M 2" 10 5-1/2" dia. 1-9/16" 6-3/4" 2-7/32"CH-N N 2-1/2." 10 6" dia. 1-1/4" S.I/S" 2-1/2"CH-P P 2-15/16"107"dia. 1" 9-3/S" 3"CH.W W '4-7/16" 10 8-1/2" dil- 1-1/4" 11-3/8" 4-3/18"CH.S S 6" 10 10" dia. 1-3/1" 15-3/4" ~15/18",.-

CONTINENTAL CXTH HUBSCXTB BUSHINGSplit taper of either malleable orcast iron type, 2" taper per foot.Shaft keyed to bushing, bushingnot keyed to pulley hub. Torquetransmitted through bolts.

CXTH25 CXTB25 1"102-1116" 1-3/16" 1-118" 11/16"CXTH30 CXTB30 1-1116" to 2-15/16" 1-1/16" 2-1/16" 1-1/16"CXTH35 CXTB35 1-15/16"103-1116" 1-13/16" 2-15/32" 3/8"CXTH40 CXTB40 2-1116"103-15/16" 1-11/161 2-13/32" 1/8"CXTH45 CXTB45 3-1116"104-1116" 1-1/16" I 3-5/16" 1-5/8"CXTH50 CXTB50 3-15/16"104-15/16" 2" 3-314" 1-1/B"CXTH60 CXTB60 5-1116" to 6" 1-1/16", 4-1/8" 2"CXTH10 CXTB10 6-1116" to 1" 1-1/8" 2-1/2"CXTHBO CXTBBO 11-1/2" to 8" 1-114" 2-15/16"CXTH100! CXTB100 8-1/2" to 10" 1-3/8" 2-13/16"

~ CONTINENTAL DODGE HUBS

DODGE "TAPER LOCK"

Split taper cast iron type 1-1/4"taper per foot. Shaft keyed tobushing, bushing not keyed topulley hub. Torque transmittedthrough bolts.(

14

FOR DETERMINING PULLEY AND SHAFT SPECIFICATIONS

This quick reference source enables the reader to select the proper pulley andshaft for wing applications. It has been prepared and used by experienced pulleyengineers who know the importance of preventing conveyor breakdown by pro-perly matching pulleys and shafts to the system.

1. From Table I: 100 H.P. at 300 F.P.M.=11,OOO#

(Te).Also 100 x 33,000 = 11 000#

300 ,.

2. From Table II: Snubbed Drive, Lagged Dri-ve, Automatic Take-up, K Factor is 0.38.0.38 x 11,000# = 4180# (T 3)'

3. Slack Side Tension (T 3) divided by beltwidth is 4180# + 42 = 100 P.I.W. Thus from

Table III a 16" diameter pulley has a P.I.W.rating equal to for greater than calcultedP.I.W. The belting manufacturer's recom-mendations for minimum pulley diametermust also be considered and the larger ofthe two should be selected.

4. Since we have a 42" belt we must have a pul-ley face width two inches wider. Thereforewe use a 44" wide pulley.

5. The Non-Drive Pulleys have the followingdegrees of wrap:

Snub: 30' Take-up: 180"Tail: 180" Bends: 90"

From Table IV, the Snub Pulley has a factorof 0.51764. 4180# x 0.51764 = 2164#. This is

the resultant load for the Snub Pulley. Alsofrom Table IV, factor for the Tail and Take-Upis 2.00000, therefore, 4180# x 2.00000 = 8360#(resultant). The Bend Pulleys have a 1.41422factor. 4180# x 1.41422 = 5911# (resultant).

6. Bearing Centers -(Minus) Face for all pul-leys: 60" -(Minus) 44" = 16". From Table V

the shaft size for the snub pulley would be2-11/16" (Allowable Load of 2350# is greaterthan Calculated Load of2164#). FortheTailand Take-Up a 4-7/16" shaft is required.(9360# being greater than 8360#). For theBend Pulleys a 3-15/16" shaft is required.(6690# being greater than 5911#).

1. The Effective Tension (Te) for a conveyorsystem is found in Table I. Locate the appro-priate Horsepower column and lo'ok downthe F.P.M. (feet per minute) column untilbelt speed of the conveyor corresponds.Read across to Horsepower column. Thisnumber is the Te of the conveyor system.Also Te= HP x 33,000

F.P.M.

2. Find the K factor for the conveyor fromTable II. The K factor has to do with the typeof driv~ and take-up of the system. Take thisK factor x (times) Te. This result is T 3 (Slackside tension) for the conveyor system.

3. Having found the maximum slack side ten-sion (T 3)' divide T 3 by the belt width. Thiswill be the calcul~ed tension in pounds perinch of belt width (P.I.W.). Select a pulleydiameter from Table )11 (Wing Pulley Allo-wable Tensions) which has a P.I.W. ratingthat is equal to or larger than the calculatedP.I.W. .

4. Pulley width in most cases will be the sameas that of the drive pulley in the system.(Two inches wider than the belt for belts upto 42" wide; three inches wider than the beltfor belts over 42" wide).

5. To calculate the resultant load, first deter-mine the arc in degrees the belt contactseach pulley. Then using Table IV (ResultantLoad Factor) find the individual factor foreach. Take this factor x (times) T 3. This gi-vesthe resultant load for each of the pulleysin question.

6. To determine shaft size, use Table V (WingPulley Allowable Shaft Loads). The table iscomputed for shaft stresses of 6000 psi. For8000 psi bending stress use a 1.33 multi-plier. Still using Table V, take the bearingcenters of the pulley and subtract the facewidth (See Figure 1). This number is used inthe "Bearing Centers -(Minus) Face" co-lumns. Next, using the resultant load obtai-ned in step 5 go down the proper "BearingCenters -(Minus) Face" column until thevalue for allowable load is greater than thecomputed resultant load. Select the corres-ponding shaft listed horizontally in the shaftsize column.

15EXAMPLE

Known:100 Horsepower 210 Wrap on Head

Pulley42" Belt

~ .60"Bea .rlng Centers on all

Pulleys

300 F.P.MHead Drive

Lagged Head PulleyAutomatic Take-upTo Find:Te and T 3Diameter of each Put!eyWidth of Pu.1J.eysResuftantLoad of each PuJleyShaft Size for each Pulley

EFFECTIVE TENSION Te

FACTOR II KI1

NOTE: For wet belts and smooth lagging, u~.e bare pulley factor.For wet belts and grooved lagging, use lagged pulley factor.If arc of contact is unknown, assume the following:

Type of drivePlain

SnubbedDual or tandem

Assumed arc of contact180021003800

ALLOWABLE SHAFT LOADS

FOR CXTH; DODGE AND O.D. HUBS

* Pounds of Tension Per Inch of Belt Width

16

TAB.LE

IVRESULTANT LOAD FACTOR-NON-DRIVE

~

NOTE: R = T 3 X Factor

WING PULLEY ALLOWABLE TENSIONS

Allowable Shaft Loads for 6.000 psi Stress (Use Multiplier of 1.33 for 8.000 psi Stress)

17

VULCANIZED RUBBER LAGGING

Vulcanized rubber lagging without cloth fabric is applied directlyto the pulley face by the vulcanizing process. The finished rubbersurface has a cloth impression left on it. Lagging is primarily usedin conditions that necessitate increasing the tractive capacity ofthe pulley in drive applications or for resisting abrasive conditionson other pulley applications. Standard lagging is of 60 durometershore A material and is available in thicknesses of 6, 10, 16, -20and 25 mm. The tolerances of vulcanized lagging are 4 mm onthe rubber thickness. Due to these tolerances, it is thereforepossible that a pulley have a high crown, flat or even concavesurface at certain points even though the pulley had a perfectcrown prior to lagging. The fact that rubber displaces can alsohave on effect on the crown since in high tension application, acertain amount of the crown can be pressed out. If you have anapplication that requires exact tolerances, we suggest you specifya machined lagged pulley.

HERRINGBONE RUBBER LAGGING

Herringbone lagging is applied to increase the tractive capacityof the pulley under wet or dirty conditions in which plain laggingwould not be sufficient for the task. The herringbone designhelps avoid build up of foreign material between the belt andpulley surface thus lowering the belt wear and minimizingalignment problems.

The minimum thickness that can be effectively grooved with theherringbone pattern is 10 mm. As with plain lagging, the samerubber specifications and limitations apply. Therefore if exacttolerances are necessary, a machined lagged pulley is advisable.

HOLZ SUDELAG

A quality rubber lagging is bonded directly to special tractionpads which in turn are fitted to the pulley rim by special retai-ning bars. This system allows new lagging to be installed on thepulley without removing it from its position on the conveyor.

LAGGED WING PULLEYS

A lagged wing pulley is used in cases involving build up of materialbetween the conveyor belt and pulley causing belt misalignmentand excessive wear. It can also be used in cases requiring a greatertractive capacity between belt and pulley. The lagged wing pulleyprinciple works as follows. Upon contact with the belt, therubber on the wing tip compresses, when tension is releived itimmediatly returns to its original shape thereby cleaning itself inthe process. These wing tip rubber sections are easily replaceable.

19

SPIRAL. DRUM PULLEYSThis unique design reduces belt wear and misalgnment. As withall self cleaning pulleys, rotation automatically starts the cleaningaction discharging foreign material to the sides of the conveyor.The Continental spiral drum pulley is formed by a pair of verticalsteel flat bars helically wound around a drum, having both begunfrom the opposite extremities of the pulley and meeting in themiddle. There is a uniform pitch to these helices and thus mate-rial is uniformly discharged. This design reduces the possibilityof material build up between the belt and pulley in applicationwhere a self cleaning wing pulley is not practical.

SPIRAL WING PULLEYSThe spiral wing pulley is used in applications that necessitatereducing material build up between the belt and pulley while alsoutilising the wing principle of the self cleaning pulley. Thecleaning action begins automatically when rotation begins andmaterial is discharged to both sides of the conveyor. The spiralwing pulley is constructed by helically winding a pair of flat steelbars around the wing pulley; having begun at opposite extremitiesand r:neeting in the center. This design minimizes belt mis-alignment afld decreases belt wear. It can be supplied in either flator crown face in most standard sizes.

\-ISPECIAL DRUM TYPE pULLEYSSpecial modifications can be made to standard pulleys in orderto suit individual customers needs. To the right we see a pulleymodified with retaining rims to assure belt alignment in the headsection of a bucket elevator.

SPECIAL SELF CLEANING PULLEYSContinental will engineer pulleys for any special application thatmay be required. The pulley shown here to the right necessitatedentire stainless steel construction and an entirely open design as itwas to come in contact with an acidic bath.

020

Elevator pulleys.Continental welded steel elevator pulleys are manufactured to close tolerances andare designed to withstand high shock loads. A one piece single disc construction isused in which the rim is continuously welded, on both sides, to the center disc. Thisassures maximum strength with a minimum of deflection. Several models includingsplit type and heavy duty are available in addition to the standard models. Anengineered class is also available to suit any application.

The standard range of single disc elevator pulleys incorporate either the 0.0. or theCXT hub and bushing systems. These ensure the greatest possible holding powerfor single hub applications. The Dodge "taper lock" however is available on request.

Shaft size must be given careful consideration in the selection of single disc elevatorpulleys since the load is concentrated at one particular point on the shaft. As withconventional welded steel conveyor pulleys, a variety of lagging including plain,herringbone and rough top is available.

* 8" FACE 9" FACE "" FACEDI~ HUB

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A 0 IWT A 0 Iwr WT

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3.11/32 1.7/1 3-25/32 1.15/32 772.15/1& 2.5/1 3-7/1& 2.5/1& 822-25/32 3.5/1 2.19/32 2.5/1 89

M/I& 4-1/2 1.15/1& 2-29/32 98

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2 5-11l 1.11l 3.7/32 164

2.21/32 2.5/1 3.15/32 2.5/1& 1812.3/4 3-5/1 2.5/1 2.5/1 18&2.1/2 4-11l 2 2.21/32 195

Z 5-11l 1.11l 3.7/32 215

2.21/32 Z.5/I 3-15/32 2.5/1& 2392.3/4 3-5/1 2.5/1 2.5/1 2452.11l 4-11l 2 2.21/32 253

1.15/1& 5-11l 2.1/1& 3.7/32 273

2.21/32 1 5/1 3.15/32 2.5/1& 3052.3/4 3-5/1 2.5/1 2.5/1 3112.1/2 4-11l 2 2-29/32 320

1.15/1& 5-11l 2.1/1& 3-7/32 339

4-3/8 1-1/8 4-3/4 1-15/32 613-31/32 2-5/8 4-13/32 2-5/16 613-13/16 3-5/8 3-8/16 2-5/8 133-19/32 4-1/2 2-29/32 2-29/32 83

4-3/8 1-1/8 4-3/4 1-15/32 103-31/32 2-5/8 4-13/32 2-5/16 163-13/16 3-5/8 3-8/16 2-5/8 833-19/32 4-1/2 2-29/32 2-29/32 92

4-11/32 1-1/8 4-25/32 1-15/32 853-15/16 2-5/8 4-1/16 2-5/16 913-25/32 3-5/8 3-19/32 2-5/8 913-t/16 4-1/2 2-15/1& 2-29/32 101

3-15/16 2-5/8 4-1/16 2-5/16 1293-25/32 3-5/8 3-11/32 2-5/8 1353-1/2 4-1/2 3 2-29/32 142

3 5-1/2 2-1/2 3-1/32 178

3-29/32 2-5/8 4-15/32 2-5/16 1913-3/4 3-5/8 3-5/8 2-5/8 2033-1/2 4-1/2 3 2-29/32 212

3 5-1/2 2-1/2 3-1/32 231

3-29/32 2-5/8 4-15/32 2-5/16 2593-3/4 3-5/8 3-5/8 2-5/8 2643-1/2 4-1/2 3 2-29/32 213

2-15/16 5-1/2 3-1/16 3-1/32 293

3-29/32 2-5/8 4-15/32 2-5/16 3283-3/4 3-5/8 3-5/8 2-5/8 3343-1/2 4-1/2 3 '2-29/32 343

2-15/16 5-1/2 3-1/16 3-1/32 362

41"

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5-3/8 1-1/8 5-3/4 1-15/32 914-31/32 2-5/8 5-13/32 2-5/16 914-13/16 3-5/8 4-1/16 2-5/8 1034-19/32 4-1/2 3-21/32 2-29/32 113

5-11/32 1-1/8 5-25/32 1-15/32 1084-15/16 2-5/1 5-1/16 2-5/16 1144-25/32 3-5/8 4-11/32 2-5/1 1204-1/16 4-1/2 3-15/16 2-21/32 129

4-15/16 2-5/1 5-1/16 2-5/16 1424-25/32 3-5/1 4-18/32 2-5/8 148

4-1/2 4-1/2 4 2-21/32 1584 5-1/2 3-1/2 3-1/32 201

4-29/32 Z-5/I 5-15/32 2-5/16 2344-3/4 3-5/1 4-5/1 2-5/8 2404-1/2 4-1/2 4 2-29/32 249

4 5-1/2 3-1/2 3-1/32 268

4-21/32 2-5/1 5-15/32 2-5/16 3034-3/4 3-5/1 4-5/1 2-5/8 3014-1/2 4-1/2 4 2-21/32 318

3-15/16 5-1/2 4-1/16 3-1/32 331

4-29/32 2-5/8 5-15/32 2-5/16 3804-3/4 3-5/8 4-5/1 2-5/8 3864-1/2 4-1/2 4 2-29/32 395

3-15/16 5-1/2 4-1/16 3-1/32 414

6-3/B 1-7/B 6-3/4 1-15/32 BB5-31/32 2-5/B 6-13/32 2-5/16 935-13/16 3-5/8 5-1/16 2-5/8 1005-19/32 4-1/2 4-21/32 2-21/32 109

6-3/B 1-7/8 6-3/4 1-15/32 1005-31/32 2-5/B 6-13/32 2-5/16 1065-13/16 3-5/8 5-1/16 2-5/8 1135-19/32 4-1/2 4-29/32 2-29/32 122

6-11/32 1-7/8 6-25/32 1-15/32 1195-15/32 2-5/8 6-7/16 2-5/11 1255-25/32 3-5/8 5-11/32 2-5/B 1315-9/16 4-1/2 4-15/16 2-21/32 140

5-15/16 2-5/1 6-7/16 2-5/11 1565-25/32 3-5/1 5-11/32 2-5/8 162

5-1/2 4-1/2 5 2-21/32 1715 5-1/2 4-1/2 3-7/32 223

5-21/32 2.5/1 6-15/32 2-5/16 2545-3/4 3-5/1 5-5/1 2-5/1 2595-1/2 4-1/2 5 2-21/32 26B

5 5-1/2 4-1/2 3-7/32 2BB

5-21/32 2-5/1 6-15/32 2-5/16 3275-3/4 3-5/1 5-5/1 2-5/8 3335-1/2 4-1/2 5 2-21/32 341

4-15/16 5-1/2 5-1/16 3-7/32 361

5-29/32 2-5/1 6-15/32 2-5/16 40B5-3/4 3-5/B 5.5/B 2-5/1 4145-1/2 4-1/2 5 2-29/32 422

4-15/16 5-1/2 5-1/16 3-7/32 442

&-7/1 1.7/1 7.1/4 1.15/32 92&-15132 2.5/1 6.29/32 2.5/16 98&-5/16 3.5/1 &-1116 2.5/1 104

&-3132 4-1/2 5-13/32 2.21/32 114

6.718 1.7/8 7-1/4 1.15/32 105&-15132 2-5/8 &-21/32 2-5/16 1116.5/16 3-518 6-1/16 2.5/1 III6-;;/32 4-1/2 513/32 2-21/32 127

6.27/32 17/8 79/32 1.15/32 1246.7116 2-5/1 6-15/16 2.5/16 130&-9132 3-5/1 6.3/32 2.5/1 1366-1/16 1 4-1/2 5-7/16 2.29/32 146

6-7116 2.5/1 6-15/16 2.5/16 163&-9132 3-5/1 6-3/32 2-5/1 181

6 4.112 5.1/2 2-29/32 1785.1/2 5.1/2 5 3.'7/32 231

6-13/321 2-5/1 6.31/32 I 25/16 2646.1/4 3-5/8 6118 2.5/1 269

6 4-1/2 5.1/2 2-29/32 2785.1/2 5-112 5 3.7/32 298

&-13/32 1 2-5/1 &-31/321 2.5/16 3396.1/4 3-5/1 6-1/8 2.5/1 344

6 41/2 5.1/2 2-29/32 3535.7/161 5112 5.9/16 3-7/32 373

6-13/32 2518 631/32 2-5/16 4226-1/4 3.5/1 &-1/1 2.5/1 427

6 4.1/2 5.1/2 2.29/32 4365.7/16 I 5-1/2 5.9/16 I 3.7/32 456

18'1

20'1

24"1

30"1

36'

42"

OTHERCONTINENTALPRODUCTS

.Screw conveyors

.Conveyor pulleys

.Conveyor idlers

.Vibrating feeders.Bucket elevators

.Engineered systems

.Chain conveyors

(En masse)

CONTINENTAL CONVEYOR & MACHINE WORKS L TO.470 St-Alphonse Steet EastThetford Mines, QuebecCanada G6G 3V8Tel. (418) 338-4682Fax (418) 338-4751

CONTINENTAL CONVEYOR (ONTARIO) LTD.100 Richmond Blvd.Napanee, OntarioCanada K7R 383Tel. (613) 354-3318Fax (613) 354-5789

continental conveyor - belt conveyor pulleys catalogue

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