Stearns 1-087-7XX Catalog Page

Series 87,700 (1-087-7XX)

Mounting Face: NEMA 182TC 184TC,
213TC, 215TC, 254TC, 254UC, 256TC and
256UC Double C-Face Coupler

8.5” AK, 7.25” AJ

Static Torque: 6 through 105 lb-ft
Enclosure Material:

Aluminum Housing, Cast Iron Endplate
Release Type: Side Lever, Maintained with

automatic reset
Enclosure Protection: IP 23, 54 & 55 (formerly

referred to by Stearns as NEMA 2, 4 & 4X
BISSC Certified, respectively).

Installation and Service Instructions:
P/N 8-078-927-27 Rev. B & C

Parts List: P/N 8-078-917-57 Rev. B
P/N 8-078-917-67 Rev. C

Modifications: Pages 54-63

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Note: 87,700 Series mounts between C-Face
motor and reducer. Do not apply overhung
load to brake output shaft.

Modification required for vertical above mounting.
For vertical below, modification required on
50-105 lb-ft..

• ABS Type Approval Certified

• Spring-Set Electrically Released

• Self-Adjusting Design

• Maximum Speed: Horizontal 4000 rpm
Vertical 3600 rpm

• Certified: CSA File LR-6254

46

*

For X and U dimensions, see Ordering Information and Identification Information.

Dimensions for estimating only. For installation purposes request certified prints.

Dimensional Data

Nominal

Static

Torque lb-ft

(Nm)

(102)

(142)

*

X in 9th digit designates hub bore and shaft size.

10

(14)

15

(20)

25

(34)

35

(47)

50

(68)

75

105

Enclosure

IP 23 1-087-711-0X 1-087-715-0X
IP 54 1-087-712-0X 1-087-716-0X
IP 55 1-087-712-BX 1-087-716-BX
IP 23 1-087-721-0X 1-087-725-0X

IP 55 1-087-722-BX 1-087-726-BX
IP 23 1-087-731-0X 1-087-735-0X

IP 55 1-087-732-BX 1-087-736-BX
IP 23 1-087-741-0X 1-087-745-0X

IP 55 1-087-742-BX 1-087-746-BX
IP 23 1-087-751-0X 1-087-755-0X

IP 55 1-087-752-BX 1-087-756-BX
IP 23 1-087-761-0X 1-087-765-0X

IP 55 1-087-762-BX 1-087-766-BX
IP 23 1-087-781-0X 1-087-785-0X
IP 54
IP 55 1-087-782-BX 1-087-786-BX

Basic Model Number

AC DC

1-087-782-0X 1-087-786-0X

** Hub location.

Dimensions in Inches

(Dimensions in Millimeters)

AAEAGC

8.38

(212.72)

8.38

(212.72)

8.38

(212.72)

8.38

(212.72)

8.88

(225.42)

8.88

(225.42)

9.38

(238.12)

2.12

(53.93)

2.12

(53.93)

2.12

(53.93)

2.12

(53.93)

2.62

(66.68)

2.62

(66.68)

3.12

(79.38)

.19

(4.83)

.19

(4.83)

.19

(4.83)

.19

(4.83)

.44

(11.18)

.44

(11.18)

1.00

(25.40)

2.81

(71.44)

2.81

(71.44)

2.81

(71.44)

2.81

(71.44)

3.31

(84.14)

3.31

(84.14)

3.81

(96.84)

(4) mounting holes equally spaced
on a 7.25” (184.15) B.C.
Use 1/2-13 x 1.25” mounting bolts.

Wt. lbs

(kg)**

66 (30.0)

66 (30.0)IP 54 1-087-722-0X 1-087-726-0X

66 (30.0)IP 54 1-087-732-0X 1-087-736-0X

66 (30.0)IP 54 1-087-742-0X 1-087-746-0X

73 (33.0)IP 54 1-087-752-0X 1-087-756-0X

73 (33.0)IP 54 1-087-762-0X 1-087-766-0X

80 (36.0)

Series 87,700 Specifications continued

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Specifications

Nominal

Static

Torque

lb-ft

(Nm)

10

(14)

15

(20)

25

(34)

35

(47)

50

(68)

75

(102)

105

(142)

1

Maximum solenoid cycle rate is based on ambient temperature of 72°F (22°C) with

50% duty cycle. Does not relate to brake cycle rate (see Thermal Capacity).

2

Thermal capacity rating is based on ambient temperature of 72°F (22°C), stop time

of one second or less, with no heat absorbed from motor. Derate thermal capacity by
25% for vertical mounting. Refer to Selection Procedure Section.

No. of

Friction

Solenoid

Discs

Size

1 5 30
1 6 25
1 6 25
1 8 20
2 6 25
2 8 20
3 8 20

Maximum

solenoid

Cycle Rate

cycles/

min

Thermal

Capacity

1

hp-sec/min

(watts)

17.5

(249)

17.5

(249)

17.5

(249)

17.5

(249)

17.5

(249)

17.5

(249)

17.5

(249)

Inertia (Wk2)

2

(kgm2 x 10-4)

lb-ft

.078

(32.76)

.078

(32.76)

.078

(32.76)

.078

(32.76)

.108

(45.36)

.108

(45.36)

.145

(60.90)

Current Ratings (amperes)

Coil
Size

5

6

8

AC

Current

Inrush

Holding

Inrush

Holding

Inrush

Holding

Voltage: 60 Hz

115 200 230 400 460 575 110 220 380

7.5

4.3

3.7

2.2

1.9

.5

13.0
.6

17.6

1.2

.3

7.5
.4

10.3
.7

.2

6.5
.3

8.8
.6

.1

3.7
.2

5.0
.3

.1

3.2
.2

4.2
.3

1.5
.09

2.6
.1

3.5
.24

Voltage: 50 Hz

5.4

4.0

.3

.25

9.4

5.6

.5

.28

15.4

7.7

.1

.5

2

1.9
.1

3.2
.2

4.2
.3

Brake set and release times in milliseconds,
when brake and motor are switched separately
(for T1/T2 definitions, see page 101):

Static Torque Coil Size T1 T2

10, 15, 25, 50 5 & 6 42 20

35, 75, 105 8 48 20

Voltage: DC

24 95

38.0
.5

42.8
.6

43.1
.8

8.4
.1

11.7
.2

11.4
.2

115 230

5.6
.08

8.5
.1

9.3
.2

3.2
.04

3.7
.06

4.6
.09

Ordering and Identification Information

The following example and tables provide information for selecting the appropriate three-letter suffix when ordering a Stearns Brake.
Example of a complete part number:

1-087-732-01-–FG Lead wire position (external, left and right)
230 Vac
Does not apply
Hub bore and output shaft size 1.125

Standard AC Voltage

Hub Bore, Shaft and Keyway Sizes

9th Digit
of Model

Number

For sizes other than those shown, contact factory.
No motor frame adapters or foot mounting kit available.

Keyseats made to ANSI B17.1 standard.

*

Bore Dia.

(X)

1.125

1

3

5

1.126

28.575

28.600

(

1.375

1.376

34.925

34.950

(

1.625

1.626

41.275

41.300

(

)

)

)

Dimensions in Inches

(Dimensions in Millimeters)

Keyway*

.25 x .12

(6.35 x 3.18)

.31 x .16

(7.94 x 3.97)

.38 x .19

(9.52 x 4.76)

Shaft Dia.

(U)

1.125

1.124

28.575

28.550

(

1.375

1.374

34.905

34.950

(

1.625

1.624

41.275

41.250

(

Modifications are available- see SAB Modification Section

Keyway*

.25 x .12

(6.35 x 3.18)

)

.31 x .16

(7.94 x 3.97)

)

.38 x .19

(9.52 x 4.76)

)

Shaft

Length (AH)

2.62

(66.68)

3.12

(79.38)

3.75

(95.25)

Ratings

Character Voltage Hz

B 115 60
D 110 50
E 200 60

230

F

190

H 220 50

460

L

380

M 415 50
N 575 60
O 110/220 50
P 115/230 60

230/460

Q

230

R 200/400 60

60
50

60
50

60
50

Direct Current

Character Voltage

T
U
V

W

X
Y
Z

Consult factory if other
DC voltage is needed

12
24
36
48

95
115
230

47