Wichita Clutch LIB User Manual

Air Tube Disc Clutches and Brakes

Typical Applications

Wichita High Torque Clutch

provides fast acceleration and

long life on metalforming

punch presses.

Typical Wichita clutch
and brake mounting
on a press

22 Wichita Clutch 800-964-3262

Wichita Low Inertia Brakes increase tension control for
paper unwind stands.

Wichita Spring-Set
Air Release Brakes
insure accuracy and
high performance for
a metal shear.

P-1100-WC 1/12

Clutch sizes are affected by the
following variables:

Air Tube Disc Clutches and Brakes

Application Factors

1. Machines that operate under smooth
loads require smaller clutches. These
machines are driven by either
multi-cylinder high speed engines or
electric motors with reduced starting
current.

2. Drives that require high starting
current motors will require clutches
with sufficient torque to prevent
excessive slipping while starting.

3. Starting torque may be high, which
requires a fast clutch response time
to transmit the required torque; or,
extended clutch slip time is required
to protect the prime mover.

This chart gives application factors
ranging from light duty (the A group) to
extra heavy duty (the D group).

After initial usage is determined, see

4. Starting torques may be very low
compared to the normal torque,
which may result in the clutch not
being fully pressurized prior to the
time of full torque requirement. This
will cause the clutch to overheat from
slippage. Clutch inflation time in this
instance is very important.

5. Clutches on most machines are
designed to slip prior to damage
from shockloads. As a result, the
clutch may require periodic
main te nance; therefore, the clutch
should be located for easy access in
the power train.
Clutch es should also be located for
max i mum cooling air. In instances

“Selection Requirements” to com plete
the selection process. The in fla tion and
exhaust time should also be checked to
insure proper response.

where this is not pos si ble, forced air
cooling may be nec es sary for
extended clutch life.

6. Safe clutch operating speeds should
be maintained in product design.

Maximum Clutch Contact Velocity

FPM Material

(Recommended

6,000
9,000

upper limit for slip)

ductile iron

cast iron

12,000 steel

Dynamic balancing recommended when
peripheral speeds exceed 3500 FPM.
The maximum speeds shown are safe
op er at ing speeds based on years of
Wichita testing. Please do not exceed
these limits.

Application Guidelines

B

Field of Application Group A Group B Group C Group D

Pumps Centrifugal Reciprocating compressors Reciprocating compressors
compressors over 2 cylinders, one or two cylinders
centrifugal fans & blowers

Agitators Liquid Semi-solid Solids
Brick Brick press, extruder, pug mill

manufacturing
Canning & bottling machine Bottle-can feeders, filling, mixers
Engine driven equipment Crane, hoist, engine Crowd
Grinding mills Ball-rod-sag-pebble Crushers, shakers
Lumber processing Yarder Carriages, conveyers Chipper, logger
Marine Propulsion clutch CP wheel Shaft brakes, propulsion

reversing type, anchor winch
Bulk material Conveyors evenly loaded, Feeders Elevators

handling line shaft evenly loaded
Metal production & Coilers, slitters, press brake, Draw bench, rolling mill, Hammer mill, forming

metalforming non-geared press, geared press shear, back geared press, press, forging press,
deep draw press, transfer header press, knuckle press
press, toggle press

Paper industry dryer Fourdrinier to 500 FPM, Fourdrinier to 1800 RPM
sections & calenders paper mill plane & press selections, calenders
Consult factory smoothing press & dryers

Petroleum Drilling & service rig master Mud pumps,
production clutches, compound clutches, PTO clutches
rotary, drum

Rubber Transfer machines Banberry mixer, drum mixer, Centrifuge
manufacturing evenly loaded extruder, calender

P-1100-WC 1/12

Wichita Clutch 800-964-3262 23

Air Tube Disc Clutches and Brakes

Low Inertia and Very Low Inertia Clutches and Brakes

Very Low Inertia

Drive Plate Assembly

with Bonded or

Riveted Pads

Floating Plate

Grooved

Friction Disc

Demountable

Backplate
(Optional)

Hub

Ductile

Center Plate

Ring Shims

Multiple Spud

Airtube

Pressure

Plate

Airtube
Holding

Plate

Roto-Coupling

Spider

Operating Features

The Wichita Air-Tube Disc Clutch com bines
all the best features of the disc type clutch with
all the advantages of direct air engagement.
The simplest and most trouble-free method of
applying air pressure is through direct axial
pressure ap pli ca tion by com pressed air in a
special com po si tion full-circle tube.

Wichita Clutches engage smoothly without
noise, shock or impact and release com plete ly
in a fraction of a second. Extremely fast action
is possible because of the small volume of air
re quired.

Clutches may be slipped moderately to control
the acceleration rate.

When large inertia loads are powered from
electric motors, smooth, controlled slip starts
by Wichita Clutches can keep power demands
below the allowed max i mum.

Heat generated by controlled slipping or
high cycle rate operation is dissipated by
the cen trif u gal blower design of these units.

Wichita Low Inertia and Very Low Inertia
Clutches and Brakes are de signed to be
com plete ly free from effects of cen trif u gal
force and self energization.

Torque developed is in direct proportion to air
pressure ap plied.

These clutches and brakes interface well with
automated controls through simple air and/or
electric circuits.

Water cooled, copper disc clutches are
available for use when power trans mis sion
needs require excessive or con stant slipping
which demands higher heat
dis si pa tion.

Wichita Clutches operate perfectly when
teamed with Wichita Brakes in pro duc tion
situations requiring tension control, cyclic
duty, or positioning.

Wichita Brakes have the same outstanding
performance characteristics as Wichita
Clutch es.

24 Wichita Clutch 800-964-3262

P-1100-WC 1/12

Air Tube Disc Clutches and Brakes

Low Inertia and Very Low Inertia Clutches and Brakes

Selection Requirements

The selection of a Low Inertia Brake is
based on:

1. Torque required to stop a load.

2. Friction area necessary to absorb
rotational energy.

3. Contact velocity of rotating discs.

4. Maximum bore capacity of unit.

Selection example

To properly select a Low Inertia Brake for
a controlled deceleration application, the
following information is needed:

Speed . . . . . . . . . . . . . . . . . . 750 RPM

Shaft Dia.. . . . . . . . . . . . . . . . 5 in.

Inertia to Stop . . . . . . . . . . . . 2,473 lb.ft.

Stop Time . . . . . . . . . . . . . . . 5 sec.

Air Pressure Available . . . . . . 80 PSI

Calculations

Avg. HP =

3.2 x 106x Stop Time

WR

2

X (RPM)

= 2,473 X (750)

3.2 x 106x 5 sec.

Swept Avg. HP
Friction =

HP ab sorp tion rate for 5 seconds

Area (see page 174)

=87 HP

= 202 in.

0.43

2

2

= 87 HP

2

Summary

As calculated, the torque required to stop the
load in 5 seconds is 14,547 lb.in. Wichita Low
Inertia Brakes are rated at 100 PSI.
This application has only 80 PSI available.

To determine the torque rating of a Low Inertia
brake at 80 PSI apply the following formula:

Application: Torque for a Low Inertia Brake

= Torque X Catalog Rated Pressure

Available Air Pressure

= 14,547 X = 18,183 lb.in.

100

80

Consult pages 26 and 36 for clutch and brake
spec i fi ca tions. A Low Inertia model 114 Brake

2

pro duc es 27,625 lb.in. torque at 100 PSI.
However, the bore capacity is 4.125 inches.
This application requires a 5 inch bore.
There fore, a Low Inertia 118 is to be
in ves ti gat ed.

Catalog Torque Rating = 64,500 lb.in.

@ 100 PSI
Maximum Bore Capacity = 5.25 in.
Catalog Swept Friction Area = 264 in.

2

Calculations show this application needs at
least 202 in.

2

to absorb the heat.

All of these ratings are acceptable for the given
application data.

Next, check contact velocity of rotating discs.

= Diameter of centerplate X RPM

3.82

B

P-1100-WC 1/12

Torque

25.5 x Stop Time

25.5 x 5

WR2x RPM

=

=

2.473 x 750

= 14,547 lb.in.

Using the above calculations, consult the
Low Inertia Specifications Chart on
pages 26 and 27.

=18" X 750

3.82

= 3,534 FPM

Standard material is sufficient up to 6,000 FPM
(see page 23). Balancing is recommended
above 3,500 FPM.

Therefore, a Low Inertia ATD-118 brake is
the optimum choice for this application.

A Spring-Set Air Release Brake is also
available (see page 58).

Note:

This application example is for pre lim i nary
sizing only. Contact a Wichita Sales Engineer
or the factory for final selection.

Wichita Clutch 800-964-3262 25

Air Tube Disc Clutches and Brakes

Low Inertia Clutches

Specifications

Model Slip Torque Capacity Duty Factors Max. Bore
Size Assembly Drawing lb.in. Nm HP/100 RPM Rect. Key
ATD- Number Number 80 PSI 100 PSI 5.5 BAR 7 BAR ABCDin. (mm)

LIC 106 6-006-100-211-0 -100-900-9 3,160 3,950 340 435 6.2 4.4 2.2 1.1
LIC 206 6-006-200-200-0 -200-900-9 6,320 7,900 680 870 12.5 8.8 4.4 2.2
LIC 108 6-008-100-103-0 D-1718 5,600 7,000 620 790 11.1 842
LIC 208 6-008-200-101-0 -200-900-9 11,200 14,000 1,240 1,580 22.2 16 842.25 (57)
LIC 308 6-008-300-103-0 D-2843 16,800 21,000 1,865 2,375 33.3 24 12 6
LIC 111 6-011-100-102-0 -100-900-9 12,720 15,900 1,400 1,785 25 18 95
LIC 211 6-011-200-102-0 -200-900-9 25,440 31,800 2,800 3,570 50 36 18 10 2.50 (64)
LIC 311 6-011-300-100-0 B-322 38,160 47,700 4,235 5,390 75 54 27 15
LIC 114 6-014-100-102-0 -100-900-9 22,100 27,625 2,435 3,100 44 31 16 8
LIC 214 6-014-200-104-0 -200-900-9 44,200 55,250 4,870 6,200 88 62 32 16 3.50 (89)
LIC 314 6-014-300-100-0 B-329 66,300 82,875 7,355 9,365 132 93 48 24
LIC 116 6-016-100-100-0 D-327 30,270 37,838 3,360 4,275 60 46 24 12
LIC 216 6-016-200-100-0 -200-900-9 60,541 75,676 6,720 8,550 120 92 48 24 4.00 (102)
LIC 316 6-016-300-100-0 D-1205 90,811 113,514 10,080 12,825 180 139 72 36
LIC 118 6-018-100-100-0 -100-100-0 51,600 64,500 5,705 7,260 102 75 35 21
LIC 218 6-018-200-100-0 -200-900-9 103,200 129,000 11,410 14,520 204 150 70 42 4.75 (121)
LIC 318 6-018-300-101-0 D-680 154,840 193,550 17,115 21,780 306 225 105 63
LIC 121 6-021-100-100-0 D-127 69,887 87,359 7,755 9,870 139 107 55 28
LIC 221 6-021-200-100-0 -200-900-9 139,775 174,719 15,510 19,740 277 213 111 55 6.00 (152)
LIC 321 6-021-300-100-0 D-783 209,662 262,078 23,265 29,610 416 320 166 83
LIC 124H 6-025-100-100-0 D-347 122,960 153,700 13,575 17,275 243 180 90 40
LIC 224H 6-025-200-100-0 -200-900-9 245,920 307,400 27,150 34,550 487 360 180 80 6.00 (152)
LIC 324H 6-025-300-201-0 -300-900-9 368,880 461,100 40,725 51,825 729 540 270 120
LIC 127 6-027-100-100-0 -100-900-9 137,509 171,886 15,260 19,420 273 210 109 55
LIC 227 6-027-200-100-0 -200-900-9 275,018 343,773 30,520 38,840 546 420 218 109 6.50 (165)
LIC 327 6-027-300-100-0 D-689 412,527 515,659 45,780 58,260 819 630 327 164
LIC 130H 6-031-100-100-0 B-195 261,600 327,000 29,630 37,710 519 380 190 100
LIC 230H 6-031-200-349-0 -200-900-9 523,200 654,000 59,260 75,420 1,038 760 380 200 7.25 (184)
LIC 330H 6-031-300-104-0 -300-902-9 784,800 981,000 88,890 113,130 1,557 1,140 570 300
LIC 136 6-036-100-100-0 -100-900-9 406,400 508,000 44,920 57,175 805 600 295 165
LIC 236 6-036-200-100-0 D-570 812,800 1,016,000 89,840 114,350 1,610 1,200 590 330 9.00 (229)
LIC 336 6-036-300-100-0 -300-900-9 1,219,200 1,524,000 134,760 171,525 2,415 1,800 885 495
LIC 142 6-042-100-303-0 -100-900-9 580,800 726,000 69,160 81,660 1,150 850 425 235
LIC 242 6-042-200-309-0 -200-900-9 1,162,240 1,452,800 128,320 163,320 2,300 1,700 850 470 14.00 (355)
LIC 342 6-042-300-302-0 -300-303-9 1,742,400 2,178,000 192,480 244,980 3,450 2,550 1,275 705
LIC 148 6-048-100-300-0 -100-901-9 1,122,000 1,402,500 118,800 151,200 2,225 1,600 800 455
LIC 248 6-048-200-300-0 -200-906-9 2,244,000 2,805,000 237,600 302,400 4,450 3,200 1,600 915 18.00 (455)
LIC 348 6-048-300-110-0 -300-900-9 3,366,000 4,207,500 356,400 453,600 6,675 4,800 2,400 1,365
LIC 260 6-060-200-302-0 -200-907-9 4,760,000 5,950,000 473,000 602,000 9,440 5,950 3,470 1,940
LIC 360 6-060-300-201-0 -300-901-9 7,140,000 8,925,000 709,000 902,300 14,160 8,925 5,205 2,910 19.00 (480)
LIC 460 6-060-400-300-0 E-236 14,280,000 17,850,000 946,000 1,204,000 18,880 11,900 6,940 3,880

Maximum Air Pressure is 130 PSI / 9 BAR.

2.00 (50)

26 Wichita Clutch 800-964-3262

P-1100-WC 1/12

Air Tube Disc Clutches and Brakes

Low Inertia Clutches

Specifications

Recom- Airtube Type Airtube
Model mended Balance Reg- High Swept Volume Total Clutch Hub & Center Plate
Size Clearance Speed Speed Speed Area in.3/(cm3) Wt. WR2/ J=mr
ATD- in. RPM RPM RPM* in.2New Worn lb. (kg) lb.ft.

LIC 106 1/16-3/32
LIC 206 3/32-5/32 78
LIC 108 1/16-1/8 56
LIC 208 3/32-5/32 1,675 1,750 3,000* 112 70 (32) 8.5 (0.357) 19 (8.6) 1.00 (0.042)
LIC 308 1/8-3/16 168
LIC 111 1/16-1/8 114
LIC 211 3/32-5/32 1,200 1,400 2,800* 228 170 (77) 34 (1.43) 45 (20.4) 4.50 (0.190)
LIC 311 1/8-3/16 342
LIC 114 1/16-1/8 158
LIC 214 3/32-5/32 950 1,200 2,200* 316 233 (106) 70 (2.95) 77 (34.9) 11.0 (0.464)
LIC 314 1/8-3/16 474
LIC 116 1/16-1/8 228
LIC 216 3/32-5/32 835 1,200 2,000* 455 326 (148) 125 (5.27) 106 (48.1) 19.6 (0.826)
LIC 316 1/8-3/16 683
LIC 118 1/16-1/8 264
LIC 218 3/32-5/32 750 1,000 2,000* 528 377 (171) 183 (7.72) 120 (54.4) 28.8 (1.214)
LIC 318 1/8-3/16 792
LIC 121 3/32-5/32 362
LIC 221 1/8-3/16 650 900 1,650* 724 582 (264) 356 (15.01) 198 (89.8) 61 (2.57)
LIC 321 5/32-7/32 1,086
LIC 124H 3/32-5/32 574
LIC 224H 1/8-3/16 550 700 1,400* 1,148 830 (376) 618 (26.05) 260 (117.9) 109 (4.6)
LIC 324H 5/32-7/32 1,722
LIC 127 3/32-5/32 730
LIC 227 1/8-3/16 500 700 1,400* 1,460 950 (431) 862 (36.3) 322 (146.1) 193 (8.1)
LIC 327 5/32-7/32 2,190
LIC 130H 3/32-5/32 827
LIC 230H 1/8-3/16 450 600 1,100* 1,654 1,411 (640) 1,552 (65.4) 546 (247.7) 370 (15.6)
LIC 330H 5/32-7/32 2,481
LIC 136 3/32-5/32 1,150
LIC 236 1/8 -3/16 375 600 900* 2,300 1,992 (904) 3,247 (136.9) 708 (321.1) 725 (30.6)
LIC 336 5/32-7/32 3,450
LIC 142 5/32-7/32 1,400
LIC 242 3/16-1/4 325 500 800* 2,800 2,732 (1,239) 5,750 (242) 1,197 (543) 1,385 (58)
LIC 342 7/32-9/32 4,200
LIC 148 1/8-1/4 2,010
LIC 248 5/32-7/32 275 400 700* 4,020 4,700 (2,132) 13,775 (581) 1,942 (881) 3,335 (141)
LIC 348 3/16-5/16 6,030
LIC 260 3/16-5/16 7,230
LIC 360 1/4-3/8 225 320 550* 10,845 11643 (5,281) 57,286 (2,415) 3,870 (1,755) 10,615 (448)
LIC 460 5/16-7/16 14,460

* Consult Factory for Special Assembly Number.

2,225 1,800 2,600*

39

1.8 11.9

(30) (195)

3.4 18.3

(56) (300)

5.5 30.5

(90) (500)

7.6 42.7

(125) (700)

9.8 56.1

(161) (919)

15.3 85.4

(251) (1,400)

18.3 97.6

(300) (1,599)

29.9 159

(490) (2,606)

29.9 159

(490) (2,606)

58.6 311

(960) (5,096)

110 415

(1,803) (6,801)

128 488

(2,098) (7,997)

217 824

(3,550) (13,500)

513 1,788

(8,407) (29,300)

27.5 (12) 2.5 (0.105) 6.40 (2.9) 0.24 (0.010)

40.5 (18) 3.3 (0.139) 12.17 (5.5) 0.46 (0.019)
62 (28) 7.5 (0.315) 11 (5.0) 0.54 (0.023)

92 (42) 99 (4.174) 28 (12.7) 2.00 (0.084)

133 (60) 27 (1.14) 23 (10.4) 2.30 (0.097)

208 (94) 52 (2.19) 121 (54.9) 7.00 (0.295)
184 (83) 56 (2.36) 46 (20.9) 5.7 (0.240)

292 (132) 80 (3.37) 121 (54.9) 16.7 (0.704)
257 (117) 103 (4.34) 59 (26.8) 10.2 (0.430)

358 (162) 125 (5.27) 151 (68.5) 29.6 (1.248)
311 (141) 158 (6.66) 73 (33.1) 15.0 (0.632)

472 (214) 219 (9.23) 180 (81.6) 43.2 (1.821)
467 (212) 303 (12.77) 116 (52.6) 32 (1.35)

730 (331) 450 (18.97) 272 (123.4) 92 (3.88)
637 (289) 468 (19.73) 132 (60.0) 56 (2.4)

1,025 (465) 735 (31.00) 379 (172.0) 160 (6.8)

770 (349) 706 (29.8) 187 (84.8) 98 (4.1)

1,112 (504) 969 (40.9) 555 (251.7) 285 (12.0)
1,035 (469) 1,170 (49.3) 298 (135.2) 189 (8.0)

1,751 (794) 1,788 (75.4) 810 (367.4) 477 (20.1)
1,455 (660) 2,368 (99.8) 461 (209.1) 372 (15.7)

2,610 (1,184) 4,057 (171.0) 1,134 (514.4) 1,091 (46.0)
1,967 (892) 4,721 (199) 680 (308) 705 (30)

3,704 (1,680) 9,191 (387) 1,324 (601) 1,809 (76)
3,158 (1,432) 9,325 (393) 1,101 (499) 1,785 (75)

6,540 (2,966) 18,000 (759) 2,950 (1,338) 4,925 (208)
9,453 (4,288) 48,733 (2,055) 2,567 (1,164) 7,077 (298)

14500 (6,577) 68,980 (2,908) 5,700 (2,585) 15,070 (635)

2

2

Wt. WR2/ J=mr

(kgm2) lb. (kg) lb.ft.2(kgm2)

2

B

P-1100-WC 1/12

Wichita Clutch 800-964-3262 27

Air Tube Disc Clutches and Brakes

Air System Data

PSI pressure

Inflation

Exhaust

Overlap

Clutch air pressure during inflation can
be closely estimated by the following:

Clutch pressure = P
(inflation)

1

1 – )PSI

1

u

Kt

(

e

This equation is accurate from 5% up
to 95% P

= Line pressure to clutch PSI

P

1

.

1

K and U = coefficients for specific

clutch and air pressure from
Spec i fi ca tion Table

e = Naperian base log

t

= Time at initiation of signal for

o

inflation sec.

t

= Time delay of air system – sec.

d

Clutch air pressure during exhaust
can be closely estimated by the
fol low ing:

Clutch pressure = (P

) (R) (E-t)vPSI

1

(exhaust)

R, E and V = coefficients for specific clutch

and air pressurefrom Spec i fi ca tion
Table

t

= Time to exhaust = E from

e

Spec i fi ca tion Table

t = Time variable – seconds. In the ex -

haust equa tion “t” cannot exceed
the value of “E” sec.

Shown are some of the air systems used
on Wichita clutches. These systems are
ac cept able for remote op er a tion where
clutch reaction time is not important.
Faster clutch re ac tion time is ac com

plished as in di cat ed in the
di a gram by lo cat ing the flow
control valve, if re quired,
and the so le noid valve as
close as possible to the

roto-cou pling. Where
clutches are located on long shafts, the
use of quick release valves on the clutch
will fa cil i tate faster clutch response.

A typical clutch-brake torque curve for
a single backshaft press (cyclic ap pli ­ca tion) would appear as shown below.

Time (sec.)

t

= time at which disengaged clutch

O

c

receives signal

t

= time of clutch en gage ment

C

c

= time of clutch full inflation

t

1

c

= time at which disengaged brake

t

O

B

receives signal

t

= time of brake engagement

B

c

= time of brake full exhaust

t

1

B

t2 = overlap time at which clutch and

brake are both engaged

28 Wichita Clutch 800-964-3262

P-1100-WC 1/12