Wichita Clutch LKB Brake User Manual
Air Tube Disc Clutches and Brakes
Spring-Set Air Release Brakes
Very Low
Inertia Drive
Plate Assembly
Bonded or Riveted
Ring
Hub
Ductile Center
Plate
Shims
Multiple
Spud Airtube
Airtube Holding
Plate
Grooved Friction
Disc
Demountable
Backplate
(Optional)
Wichita Spring-Set Air Release Brakes are
ideal for fail safe protection of process
equipment. Constructed of high strength cast
iron, this improved design has thick friction
discs for longer wear life. The fast acting airtube design assures quick, smooth stops.
• No lubrication
• No adjustment
• Available in vertical mount
• Quick, simple installation
• Explosion proof design
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
58 Wichita Clutch 800-964-3262
P-1100-WC 1/12
Air Tube Disc Clutches and Brakes
Spring-Set Air Release Brakes
Selection
Low Inertia Spring-Set Brake
To properly select a brake, the total
rotating inertia, WR
to the brakeshaft.
Application Data:
Refer to page 45, except, cyclic op er a tion—
7 CPM, and 218 Very Low Inertia Clutch.
Alternate Shaft WR2referred to clutch shaft =
(Alternate Shaft WR
2
referred to clutch-brake shaft
WR
= (39,091)
2
referrred to clutch-brake shaft
WR
= 845.4 lb.ft.
Crank Shaft WR
Clutch-Brake Shaft WR2= 78.2 lb.ft.
Clutch Hub and Drive Plate WR
from Specification Table = 14.7 lb.ft.
Est. Brake WR
Est. Total WR2= 953.0 lb.ft.
(page 61)
2
, must be reflected
2
2
30
(
)
204
2
@ 204 RPM
2
= 845.4 lb.ft.
2
= 14.7 lb.ft.
Alternate Shaft RPM
)
(
Clutch Brake Shaft RPM
2
From duty chart (page 23) “Group B”
for spring-set brake (SS):
214 SS Brake is rated @ 28 HP/100 RPM
90% torque rating = 24,800 lb.in.
2
of 214 SS VLI Brake = 4.5 lb.ft.2, therefore
WR
deceleration torque calculation is correct.
*Average heat horsepower to clutch & brake.
2
Avg. heat HP =
2
(Total WR
)
(953) (41,616) (7)
=
1.9 x 10
*Check with factory for heat capacity.
2
2
2
2
2
Note:
This application example is for preliminary
sizing only. Contact a Wichita Sales Engineer
or the factory for final se lec tion.
8
) (RPM2) (CPM)
1.9 x 10
= 1.45 HP
8
B
Brake Selection:
Stopping angle of crank shaft = 120° = Ø
Use 90° for calculation
Estimated time to stop:
b
Ø
t =
(
) (
360° crank shaft RPM
90 )(60
=
(
360 30
Deceleration Torque
= (12)
= (12)
= 15,250 lb.in.
HP/100 RPM
15,250
=
WR
(
32.2 (9.5) (t)
953 )(204
(
32.2 (9.5) (.5)
= 24 HP/100 RPM
630
60
= .5 sec.
)
2
clutch-brake RPM
)(
)
)
)
b
P-1100-WC 1/12
Wichita Clutch 800-964-3262 59
Air Tube Disc Clutches and Brakes
Spring-Set Brakes
Specifications
Model Assembly Slip Torque Capacity Max. Bore
Size Number lb.in. Nm Rect. Key
ATD- 60 PSI Release 60 PSI 75 PSI 90 PSI 4.1 BAR 5.2 BAR 6.2 BAR in. (mm)
SSB 104H 71104-730* 451 51 1.00 (25)
SSB 106 7-106-100-200-0 2,225 2,900 3,700 251 328 418
SSB 206 7-106-200-200-0 4,300 5,600 7,200 486 633 813 2.00 (50)
SSB 306 7-106-300-100-0* 5,750 7,400 9,050 650 836 1,022
SSB 108 7-108-100-123-0 3,700 4,800 6,200 418 542 700
SSB 208 7-108-200-121-0 7,100 9,100 12,000 802 1,028 1,356 2.25 (57)
SSB 308 7-108-300-101-0 8,800 11,300 13,400 994 1,277 1,514
SSB 111 7-111-100-102-0 8,200 10,500 11,600 926 1,186 1,311
SSB 211 7-111-200-100-0 15,600 20,000 22,200 1,763 2,260 2,508 2.50 (64)
SSB 311 7-111-300-100-0 19,300 24,900 28,400 2,181 2,813 3,209
SSB 114 7-114-100-127-0 14,500 18,600 24,700 1,638 2,101 2,791
SSB 214 7-114-200-103-0 27,600 35,400 46,300 3,118 4,000 5,231 3.50 (89)
SSB 314 7-114-300-100-0 36,000 44,700 53,900 4,067 5,050 6,090
SSB 116 7-116-100-100-0 19,300 23,800 28,400 2,181 2,689 3,209
SSB 216 7-116-200-100-0 35,300 44,700 53,400 3,988 5,050 6,033 4.00 (102)
SSB 316 7-116-300-100-0 49,500 62,600 75,000 5,593 7,073 8,474
SSB 118 7-118-100-100-0 31,400 40,400 51,600 3,548 4,564 5,830
SSB 218 7-118-200-100-0 60,000 77,000 100,000 6,779 8,700 11,298 4.75 (120)
SSB 318 7-118-300-100-0 80,900 102,000 122,000 9,140 11,524 13,784
SSB 121 7-121-100-100-0 38,300 47,400 57,400 4,327 5,355 6,485
SSB 221 7-121-200-100-0 71,700 88,800 107,600 8,101 10,033 12,157 6.00 (152)
SSB 321 7-121-300-101-0 100,200 124,100 150,400 11,321 14,021 16,992
SSB 124H 7-125-100-100-0 75,500 86,600 — 8,530 9,784 —
SSB 224H 7-125-200-100-0 137,000 161,200 — 15,478 18,213 — 6.00 (152)
SSB 324H 7-125-300-100-0 178,900 223,600 — 20,212 25,263 —
SSB 127 7-127-100-105-0 75,300 94,200 113,400 8,508 10,643 12,812
SSB 227 7-127-200-118-0 140,900 176,200 212,100 15,919 19,907 23,963 6.50 (165)
SSB 327 7-127-300-102-0 196,700 245,900 296,000 22,223 27,782 33,443
SSB 130H 7-131-100-101-0 162,200 211,700 260,500 18,326 23,918 29,432
SSB 230H 7-131-200-100-0 310,000 404,500 495,500 35,024 45,701 55,982 7.25 (184)
SSB 330H 7-131-300-305-0 395,500 496,100 589,900 44,684 56,050 66,648
SSB 136H 7-137-100-100-0 254,500 300,000 400,000 28,754 33,894 45,193 9.00 (229)
SSB 236H 7-137-200-104-0 477,500 564,000 760,000 53,949 63,722 85,866 10.00 (254)
SSB 336H 7-137-300-101-0* 675,000 840,100 1,012,600 76,263 94,916 114,405 10.00 (254)
SSB 436H 7-137-400-102-0 868,800 1,081,300 1,303,400 98,158 122,167 147,260 10.00 (254)
SSB 142 7-142-100-302-0 425,000 48,017
SSB 242 7-142-200-306-0 796,000 89,933 14.00 (355)
SSB 342 7-142-300-301-0 1,072,000 121,116
SSB 148 7-148-100-300-0 698,250 78,889
SSB 248 7-148-200-300-0 1,335,000 150,830 18.00 (455)
SSB 348 7-148-300-103-0 1,726,000 195,006
SSB 260 7-160-200-300-0 3,255,000 367,755
SSB 360 TBD 4,921,000 555,982 19.00 (480)
SSB 460 TBD 5,355,000 605,016
* Not the standard 60 PSI release pressure. See following pages for release pressure per assembly.
60 Wichita Clutch 800-964-3262
P-1100-WC 1/12
Air Tube Disc Clutches and Brakes
Spring-Set Brakes
Specifications
Recom- Hub & C.P. Airtube
Model mended Balance Reg- High Swept Volume Total Brake Hub & Center Plate
Size Clearance Speed Speed Speed Area in.3(cm3) Wt. Wt. WR2/ J=mr
ATD- in. RPM RPM RPM* in.
SSB 104H 1/32-1/16 3,325 5,250 5,250* 17 0.9 3.4 11.0 (7) 1.54 (0.7) 0.021 (0.001)
SSB 106 1/16-3/32 39
SSB 206 3/32-1/8 2,225 3,800 5,700* 78
SSB 306 3/32-1/8 117
SSB 108 1/16-1/8 56
SSB 208 3/32-5/32 1,675 2,870 4,300* 112 70 (32) 19 (8.6) 1.00 (0.042)
SSB 308 1/8-3/16 168
SSB 111 1/16-1/8 114
SSB 211 3/32-5/32 1,200 2,090 3,125* 228 166 (75) 45 (20.4) 4.50 (0.190)
SSB 311 1/8-3/16 342
SSB 114 1/16-1/8 158
SSB 214 3/32-5/32 950 1,640 2,450* 316 233 (106) 77 (34.9) 11.0 (0.464)
SSB 314 1/8-3/16 4 74
SSB 116 1/16-1/8 228
SSB 216 3/32-5/32 835 1,430 2,150* 455 326 (148) 106 (48.1) 19.6 (0.826)
SSB 316 1/8-3/16 683
SSB 118 1/16-1/8 264
SSB 218 3/32-5/32 750 1,270 1,910* 528 377 (171) 120 (54.4) 28.8 (1.214)
SSB 318 1/8-3/16 792
SSB 121 3/32-5/32 362
SSB 221 1/8-3/16 650 1,090 1,650* 724 575 (261) 198 (89.8) 61 (2.57)
SSB 321 5/32-7/32 1,086
SSB 124H 3/32-5/32 574
SSB 224H 1/8-3/16 550 950 1,410* 1,148 840 (381) 260 (117.9) 110 (4.6)
SSB 324H 5/32-7/32 1,722
SSB 127 3/32-5/32 730
SSB 227 1/8-3/16 500 850 1,250* 1,460 924 (419) 329 (149.2) 191 (8.1)
SSB 327 5/32-7/32 2,190
SSB 130H 3/32-5/32 827
SSB 230H 1/8-3/16 450 765 1,130* 1,654 1,350 (612) 546 (247.7) 370 (15.6)
SSB 330H 5/32-7/32 2,481
SSB 136H 3/32-5/32 1,150
SSB 236H 1/8 -3/16 375 640 950* 2,300 1,993 (904) 708 (321.1) 725 (30.6)
SSB 336H 5/32-7/32 3,450
SSB 436H 3/16-1/4 4,600 4,025 (1,826) 1,600 (697) 1,457 (61.4)
SSB 142 5/32-7/32 1,400
SSB 242 3/16-1/4 325 545 805* 2,800 2,732 (1,239) 1,197 (543) 1,385 (58)
SSB 342 7/32-9/32 4,200
SSB 148 1/8-1/4 2,010
SSB 248 7/32-9/32 275 475 705* 4,020 4,700 (2,132) 1,942 (881) 3,335 (141)
SSB 348 3/16-5/16 6,030
SSB 260 3/16-5/16 7,230
SSB 360 1/4-3/8 225 380 575* 10,845 11,643 (5,281) 3,870 (1,755) 10,615 (448)
SSB 460 5/16-7/16 14,460
* Consult Factory for Special Assembly Number.
2
New Worn lb. (kg) lb. (kg) lb.ft.
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) 6.40 (2.9) 0.24 (0.010)
40.5 (18) 12.17 (5.5) 0.46 (0.019)
62 (28) 11 (5.0) 0.54 (0.023)
87 (39) 28 (12.7) 2.00 (0.084)
130 (59) 23 (10.4) 2.30 (0.097)
208 (94) 121 (54.9) 7.00 (0.295)
184 (83) 46 (20.9) 5.7 (0.240)
290 (132) 121 (54.9) 16.7 (0.704)
254 (115) 59 (26.8) 10.2 (0.430)
358 (162) 151 (68.5) 29.6 (1.248)
311 (141) 73 (33.1) 15.0 (0.632)
461 (209) 180 (81.6) 43.2 (1.821)
460 (209) 116 (52.6) 32 (1.35)
723 (328) 312 (141.5) 122 (5.14)
618 (280) 132 (60.0) 56 (2.4)
1,025 (465) 379 (172.0) 160 (6.8)
760 (345) 187 (84.8) 98 (4.1)
1,112 (504) 555 (251.7) 285 (12.0)
972 (441) 298 (135.2) 189 (8.0)
1,751 (794) 810 (367.4) 477 (20.1)
1,388 (630) 461 (209.1) 372 (15.7)
2,610 (1,184) 1,134 (514.4) 1,091 (46.0)
1,967 (892) 680 (308) 705 (30)
3,704 (1,680) 1,324 (601) 1,809 (76)
3,158 (1,432) 1,101 (499) 1,785 (75)
6,540 (2,966) 2,950 (1,338) 4,925 (208)
9,453 (4,288) 2,567 (1,164) 7,077 (298)
14,500 (6,577) 5,700 (2,585) 15,070 (635)
2
2
kgm
2
B
P-1100-WC 1/12
Wichita Clutch 800-964-3262 61
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