Twin City Fans With CE Mark - ES-2-06 - Manual (Page 5)

5. Twin.City.Fan.Engineering.Supplement.2-06
10..Mount.drives.as.follows:
.
a..Slip. (do. not. pound). proper. sheave. onto. cor-
responding. shaft.. CAUTION:. PLACING. FAN.
SHEAVE.ON.MOTOR.CAN.OVERSPEED.WHEEL.
AND.CAUSE.STRUCTURAL.FAILURE.
. b..Align.sheaves.with.a.straight-
edge. extended. along. the.
perimeters. of. both. sheaves,.
just. making. contact. in. two.
places. on. outside. perimeters.
of. both. sheaves. (see. Figure.
5).. Parallel. alignment. should.
be. within. 5mm. per. meter.
of. center. distance.. Angular.
Misalignment. should. be. less.
than.1.degree.
. c..Tighten.down.sheave.bolts.
. d..Install. a. matched. set. of.
belts.. Adjust. belt. tension. as.
indicated.in.“Drive.Mounting”.
step.#3.
Size
Grade 2 Grade 5 Grade 8 Aluminum Stainless
(Ft - lbs) (N - m) (Ft - lbs) (N - m) (Ft - lbs) (N - m) (Ft - lbs) (N - m) (Ft - lbs) (N - m)
1/4 - 20 5.5 7.5 8 10.8 12 16.3 3.8 5.2 6.3 8.5
5/16 - 18 11 15 17 23 25 34 6.7 9.1 11 15
3/8 - 16 22 30 30 41 45 61 11.9 16 19 26
7/16 - 14 30 41 50 68 70 95 19 26 31 42
1/2 - 13 55 75 75 102 110 149 26 35 43 58
5/8 - 11 100 136 150 203 220 298 59 80 92 125
3/4 - 10 170 230 270 366 380 515 81 110 128 174
7/8 - 9 165 224 430 583 600 813 125 169 194 263
1 - 8 250 339 645 874 900 1220 184 249 287 389
1 1/4 - 7 500 678 1120 1518 1500 2034 336 456 523 709
. e..Tighten.belts.to.proper.belt.tension..Record.the.
belt.tension.used..See.drive.mounting.section.for.
tensioning.instructions..Proper.tension.is.specified.
in.the.datasheet.included.with.the.fan.
11..Fans.that.have.motors.and.drives.mounted.at.the.
factory. are. trim. balanced. prior. to. shipment.. This.
is. not. possible. on. units. that. are. shipped. without.
motors. and. drives.. The. addition. of. drive. compo-
nents.in.the.field.can.create.unbalance.forces..Twin.
City. Companies,. Ltd.. recommends. final. balancing.
of.the.unit.after.the.drive.components.are.installed..
Failure.to.do.so.voids.the.Twin.City.Fan.Companies,.
Ltd..warranty.
12..Repeat.the.installation.checks.indicated.for.factory.
assembled. units. to. assure. proper. tightness. and.
alignment.of.all.components.
Bearing Installation
Bearings.are.only.to.be.field.installed.when.accompa-
nied.by.installation.instructions.from.the.bearing.manu-
facturer.. When. field. installation. is. required,. follow. the.
manufactures.instructions.carefully.to.install.bearings.
Table 1. Bolt Tightening Torque
METRIC SHAFTS SET SCREW SIZE LOCKING COLAR SCREW SIZE
Manufacturer BRG ID Units M5 M6 M8 M10 M12 M4 M5 M6 M8
Dodge S2000 N-m - - 17.8 35 57 - - - -
Dodge SCAH N-m 3.4 6.9 16 28 51 5.85 10.75 20.5 45
Dodge SCMAH N-m 3.4 6.9 16 28 51 5.85 10.75 20.5 45
SKF SY N-m See.Below 4.2 7.4
Table 2b. Metric Set Screw Torque Specifications
SY BEARING DIAMETER PB224 BEARING DIAMETER
Manufacturer BRG ID Units 12-35mm 40-45mm 50-65mm 70-100mm 25,30mm 35-50mm 55mm 60-80mm 90,100mm
SKF SY N-m 4. 6.5 16.5 28.5 - - - - -
Linkbelt PB224 N-m - - - - 21 37 52 77 153
Table 2a. Bearing Cap Bolt Torque Specifications (see page 6)
Bolt
Size
Bushing
Type
Iron/Steel Hub,
Sheave
Aluminum
Hub
Ft - lbs N - m Ft - lbs N - m
1/4 - 20 H 8 11 8 11
5/16 - 18 P,.B 17 23 13 18
3/8 - 16 Q,.R 30 41 24 33
1/2 - 13 S 70 95 - -
Table 3. Browning Split Taper Bushing Tightening Torque
Table 2c. IP Set Screw Torque Specifications (see page 7)
Set Screw
Size
Steel Set Screws Stainless Set Screws
Ft - lbs N - m Ft - lbs N - m
1/4 - 20 5.5 7.5 5.8 7.9
5/16 - 18 11 15 11 15
3/8 - 16 22 30 19 26
7/16 - 14 30 41 28 38
1/2 - 13 55 75 42 57
5/8 - 11 100 136 82 111
3/4 - 10 170 230 115 156
7/8 - 9 165 224 - -
1 - 8 250 339 - -
1 1/4 - 7 500 678 - -
Table 4. Set Screw Tightening Torque (other than bearing
set screws)
Figure 5.
Sheave Alignment