Stearns 1-056-7XX, 1-056-7XS Catalog Page

Series 56,700 (1-056-7XX) Die Cast Aluminum (1-056-7XS) Stainless Steel

Mounting Face: NEMA 56C, 143TC and 145TC

4.5” AK, 5.88” AJ

Static Torque: 1.5 through 25 lb-ft Enclosure Material: IP 23, 54 & 55 Die Cast Aluminum;

IP 56 Stainless Steel

Release Type: Knob, Maintained with automatic reset Enclosure Protection: IP 23 & 54 (formerly referred to

by Stearns as NEMA Type 2 & 4 respectively). IP 55 & 56 (formerly referred to by Stearns as NEMA

Type 4X BISSC Certified & Type 4X stainless steel enclosure, respectively).

• ABS Type Approval Certified

• Spring-Set Electrically Released

• Adjustable Torque

• Manual Release Knob, Maintained with Automatic Reset

• Manual Wear Adjustment

• Maximum Speed: 5000 rpm Horizontal

3600 rpm Vertical

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Note: 56,700 Series mounts between C-Face motor and reducer. Do not apply overhung load to brake output shaft.

Installation and Service: P/N 8-078-905-67

Parts List: P/N 8-078-906-07 Modifications: Pages 54-63

Universal Mounting: Through 15 lb-ft.

20 and 25 lb-ft. supplied with springs for vertical modification.

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

see page 101)

Static

Torque lb-ft

Coil Size

T1 T2

1½ - 25 4, K4, K4+, M4+ 25 14

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

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

Dimensions

Dimensions in

AJL

4.91

(124.7)

4.94

(125.5)

4.94

(125.5)

4.91

(124.7)

4.94

(125.5)

4.94

(125.5)

4.94

(125.5)

4.91

(124.7)

4.94

(125.5)

4.94

(125.5)

4.94

(125.5)

4.91

(124.7)

4.94

(125.5)

4.94

(125.5)

4.94

(125.5)

Nominal

Static

Torque

(lb-ft) (Nm)

1.5

(2)

(4)

(8)

(14)

Enclosure Type

IP 23

IP 54

IP 55

IP 23

IP 54

IP 55

IP 56 AC 1-056-71S-0X

IP 23

IP 54

IP 55

IP 56

IP 23

IP 54

IP 55

IP 56 AC 1-056-73S-0X

Basic Model

Number

ACDC1-056-701-0X

1-056-705-0X

ACDC1-056-702-0X

1-056-706-0X

ACDC1-056-704-0X

1-056-708-0X

ACDC1-056-711-0X

1-056-715-0X

ACDC1-056-712-0X

1-056-716-0X

ACDC1-056-714-0X

1-056-718-0X

ACDC1-056-721-0X

1-056-725-0X

ACDC1-056-722-0X

1-056-726-0X

ACDC1-056-724-0X

1-056-728-0X AC 1-056-72S-0X ACDC1-056-731-0X

1-056-735-0X ACDC1-056-732-0X

1-056-736-0X ACDC1-056-734-0X

1-056-738-0X

3/8-16 mounting

Inches (mm)

3.81

(96.8)

3.88

(98.6)

3.88

(98.6)

3.81

(96.8)

3.88

(98.6)

3.88

(98.6)

3.88

(98.6)

3.81

(96.8)

3.88

(98.6)

3.88

(98.6)

3.88

(98.6)

3.81

(96.8)

3.88

(98.6)

3.88

(98.6)

3.88

(98.6)

Wt.

lbs

(kg)

1.53

(38.9)12(5.4)

1.53

(38.9)13(5.9)

1.53

(38.9)13(5.9)

1.53

(38.9)12(5.4)

1.53

(38.9)13(5.9)

1.53

(38.9)13(5.9)

1.53

(38.9)22(10)

1.53

(38.9)12(5.4)

1.53

(38.9)13(5.9)

1.53

(38.9)13(5.9)

1.53

(38.9)22(10)

1.53

(38.9)12(5.4)

1.53

(38.9)13(5.9)

1.53

(38.9)13(5.9)

1.53

22 (10)

(38.9)

Dimensions

Nominal

Static

Torque

(lb-ft)

(Nm)

(20)

(27)

(34)

Enclosure Type

IP 23

IP 54

IP 55

IP 56 AC 1-056-74S-0X

IP 23

IP 54

IP 55

IP 56

IP 23

IP 54

IP 55

IP 56 AC 1-056-76S-0X

Basic Model

Number

ACDC1-056-741-0X

1-056-745-0X

ACDC1-056-742-0X

1-056-746-0X

ACDC1-056-744-0X

1-056-748-0X

ACDC1-056-751-07

1-056-755-07

ACDC1-056-752-07

1-056-756-07

ACDC1-056-754-07

1-056-758-07 AC 1-056-75S-0X ACDC1-056-761-07

1-056-765-07 ACDC1-056-762-07

1-056-766-07 ACDC1-056-764-07

1-056-768-07

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

Dimensions in

Inches (mm)

AJL

4.91

3.81

(96.8)

3.88

(98.6)

3.88

(98.6)

3.88

(98.6)

3.81

(96.8)

3.88

(98.6)

3.88

(98.6)

3.88

(98.6)

3.81

(96.8)

3.88

(98.6)

3.88

(98.6)

3.88

(98.6)

1.53

(38.9)12(5.4)

1.08

(27.4)13(5.9)

1.08

(27.4)13(5.9)

1.53

(38.9)22(10)

1.08

(27.4)12(5.4)

1.08

(27.4)14(6.3)

1.08

(27.4)14(6.3)

1.08

(27.4)22(10)

1.08

(27.4)13(5.9)

1.08

(27.4)14(6.3)

1.08

(27.4)14(6.3)

1.08

(27.4)22(10)

(124.7)

4.94

(125.5)

4.94

(125.5)

4.94

(125.5)

5.36

(136.1)

5.39

(136.9)

5.39

(136.9)

5.39

(136.9)

5.36

(136.1)

5.39

(136.9)

5.39

(136.9)

5.39

(136.9)

Wt.

lbs

(kg)

Series 56,700 Continued

Engineering Specifications

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Nominal

Static Torque

lb-ft

(Nm)

1.5

(2) (4) (8)

(14)

(20)

(27)

(34)

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).

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. Refer to Selection Procedure Section.

No. of

Friction

Discs

1 4+4 2036

3 6

1 4+4 2036 1 K4-K4 2036 2 K4+K4 2036 2 M4+K4+ 2036 3 M4+K4+ 2036 3 P4+M4+ 2036

Coil Size

DCAC

Maximum Solenoid

Cycle Rate

cycles/min

DCAC

Thermal

Capacity

hp-sec/min (watts)

(112)

VerticalHorizontal

6.5

(80)

6.5

(80)

6.5

(80)

6.5

(80)

6.5

(80)

6.5

(80)

6.5

(80)

Inertia (Wk2)

(kgm2 x 10-4)

Current Ratings (amperes)

Solenoid

Coil Size

K4+

M4+

P4+

Current

inrush

holding

inrush

holding

inrush

holding

inrush

holding

inrush

holding

inrush

holding

inrush

holding

115 200 230 400 460 575 24110 95220 230115380

3.6 .3

4.3 .3

4.6 .4

3.0 .6

4.6 .4

Voltage: 60 Hz Voltage: DCVoltage: 50 Hz

2.1

1.8

1.1

2.5 .2

1.7 .3

2.5 .2

.08

2.2

1.3

2.3

1.2

1.5

2.3

1.2

.08

1.1 .08

1.0 .1

.8 .1

1.0 .1

.7 .06

.9 .07

.9 .08

.6 .1

.9 .08

4.1 .3

3.8 .4

4.9 .4

4.1 .4

2.1

.08

1.9

1.1

.08

2.0

1.0

2.0 .2

1.3 .1

lb - ft

.008

(3.36)

.008

(3.36)

.008

(3.36)

.014

(5.88)

.014

(5.88)

.020

(8.40)

.020

(8.40)

13.3 .3

12.0 .4

17.5 .4

20.5 .5

30.3 .5

3.6 .1

4.7 .1

7.5 .1

7.9 .1

11.3 .1

2.8 .05

3.7 .08

5.5 .08

8.4 .08

1.5 .03

2.0 .04

3.0 .04

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:

1-056-731-05-

Series

230 Vac

Torque

Does not apply

Enclosure

5/8 hub bore and shaft

FF Lead wire position (internal and external, left and right)

Standard AC

Hub Bore, Shaft and Keyway Sizes

9th Digit of

Model No.

Bore Dia.

(X)

5 .625.625 .19 x .09.19 x .09 7

.875

.875 with sleeve to convert to .625

.19 x .09

*One sleeve provided in each brake. **Keyseats made to ANSI B17.1 standard.

Shaft Dia.

(U)

.875

.625 with sleeve to convert to .875

Keyway** Keyway**

.19 x .09

Voltage Ratings

Character Voltage Hz

B 115 60 D 110 50 E 200 60

230

190

H 220 50

460

M 415 50

O 110/220 50

380

N 575 60

115/208

230

208 230/460 190/380

R 200/400 60

60 50

60 60

Direct Current

Character Voltage

T U V

X Y Z

Consult factory if other DC voltage is needed.

12 24 36 48

95 115 230

Modifications are available- see SAB Modification Section

Stearns 1-056-7XX, 1-056-7XS Catalog Page

Specifications and Main Features

Frequently Asked Questions

User Manual