World K Series Electromagnetic Brake Motors (Legacy)

These motors are directly coupled to an AC electromagnetic brake which is activated when power is not applied. When the power source is turned off, the motor stops instantaneously and holds the load. Since the electromagnetic brakes exert holding power even while the power is off, they are ideal for use as emergency brakes and in vertical load applications.

Frame sizes from 2.36 in to 3.54 in
Output power from 1/125 HP (6 W) to 1/8 HP (90 W)
Rated torque from 0.36 lb-in to 260 lb-in
Geared and round shaft models available

Item #	Item Name	Motor Frame Size	Output Power	Voltage (VAC)	Gear Ratio (X:1)	Shaft/Gear Type	Type	Rated Torque (lb-in)	Rated Speed (rpm)
2RK6AA-AWMU	- Electromagnetic Brake Reversible Motor	- 2.36 in. sq.	- 6 W (1/125 HP)	- Single-Phase 110/115 VAC	-	- Round Shaft (No Gearhead)	- Lead Wire	- 0.36	- 1450
3RK15AA-AWMU	- Electromagnetic Brake Reversible Motor	- 2.76 in. sq.	- 15 W (1/50 HP)	- Single-Phase 110/115 VAC	-	- Round Shaft (No Gearhead)	- Lead Wire	- 0.91	- 1450
4RK25AA-AWMU	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 110/115 VAC	-	- Round Shaft (No Gearhead)	- Lead Wire	- 1.48	- 1450
5RK40AA-AWMU	- Electromagnetic Brake Reversible Motor	- 3.54 in. sq.	- 40 W (1/19 HP)	- Single-Phase 110/115 VAC	-	- Round Shaft (No Gearhead)	- Lead Wire	- 2.26	- 1450
4IK25GN-SWM / 4GN12.5RH	- Electromagnetic Brake Induction Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Three-Phase 200/220/230 VAC	- 12.5 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 10 [60 Hz] 12.7 [200 VAC, 50 Hz]	- 120[200 VAC, 50 Hz] 144 [60 Hz]
4IK25GN-SWM / 4GN3RH	- Electromagnetic Brake Induction Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Three-Phase 200/220/230 VAC	- 3 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 1.6 [60 Hz] 2 [200 VAC, 50 Hz]	- 500[200 VAC, 50 Hz] 600 [60 Hz]
4IK25GN-SWM / 4GN5RH	- Electromagnetic Brake Induction Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Three-Phase 200/220/230 VAC	- 5 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 3.4 [200 VAC, 50 Hz] 2.7 [60 Hz]	- 300[200 VAC, 50 Hz] 360 [60 Hz]
4IK25GN-SWM / 4GN7.5RH	- Electromagnetic Brake Induction Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Three-Phase 200/220/230 VAC	- 7.5 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 6.3 [200 VAC, 50 Hz] 5 [60 Hz]	- 200[200 VAC, 50 Hz] 240 [60 Hz]
4IK25GN-SWM / 4GN25RH	- Electromagnetic Brake Induction Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Three-Phase 200/220/230 VAC	- 25 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 25 [200 VAC, 50 Hz] 20 [60 Hz]	- 60[200 VAC, 50 Hz] 72 [60 Hz]
4IK25GN-SWM / 4GN100RH	- Electromagnetic Brake Induction Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Three-Phase 200/220/230 VAC	- 100 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 70	- 15[200 VAC, 50 Hz] 18 [60 Hz]
4IK25GN-SWM / 4GN150RH	- Electromagnetic Brake Induction Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Three-Phase 200/220/230 VAC	- 150 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 70	- 10[200 VAC, 50 Hz] 12 [60 Hz]
4IK25GN-SWM / 4GN50RH	- Electromagnetic Brake Induction Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Three-Phase 200/220/230 VAC	- 50 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 50 [200 VAC, 50 Hz] 39 [60 Hz]	- 30[200 VAC, 50 Hz] 36 [60 Hz]
4IK25GN-SWM / 4GN75RH	- Electromagnetic Brake Induction Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Three-Phase 200/220/230 VAC	- 75 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 70 [200 VAC, 50 Hz] 60 [60 Hz]	- 20[200 VAC, 50 Hz] 24 [60 Hz]
4RK25GN-AWMU / 4GN12.5RH	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 110/115 VAC	- 12.5 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 11.3	- 144
4RK25GN-AWMU / 4GN3RH	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 110/115 VAC	- 3 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 1.8	- 600
4RK25GN-AWMU / 4GN5RH	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 110/115 VAC	- 5 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 3	- 360
4RK25GN-AWMU / 4GN7.5RH	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 110/115 VAC	- 7.5 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 5.7	- 240
4RK25GN-AWMU / 4GN25RH	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 110/115 VAC	- 25 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 23	- 72
4RK25GN-AWMU / 4GN100RH	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 110/115 VAC	- 100 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 70	- 18
4RK25GN-AWMU / 4GN150RH	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 110/115 VAC	- 150 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 70	- 12
4RK25GN-AWMU / 4GN50RH	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 110/115 VAC	- 50 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 45	- 36
4RK25GN-AWMU / 4GN75RH	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 110/115 VAC	- 75 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 68	- 24
4RK25GN-CWME / 4GN12.5RH	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 220/230 VAC	- 12.5 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 11.3 [60 Hz] 13.6 [50 Hz]	- 120[50 Hz] 144 [60 Hz]
4RK25GN-CWME / 4GN3RH	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 220/230 VAC	- 3 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 1.8 [60 Hz] 2.2 [50 Hz]	- 500[50 Hz] 600 [60 Hz]
4RK25GN-CWME / 4GN5RH	- Electromagnetic Brake Reversible Motor	- 3.15 in. sq.	- 25 W (1/30 HP)	- Single-Phase 220/230 VAC	- 5 :1	- Right-Angle Hollow Shaft Gearhead	- Lead Wire	- 3 [60 Hz] 3.6 [50 Hz]	- 300[50 Hz] 360 [60 Hz]

Item #

Item Name

Motor Frame Size

Output Power

Voltage (VAC)

Gear Ratio (X:1)

Shaft/Gear Type

Type

Rated Torque (lb-in)

Rated Speed (rpm)

2RK6AA-AWMU

- Electromagnetic Brake Reversible Motor

- 2.36 in. sq.

- 6 W (1/125 HP)

- Single-Phase 110/115 VAC

- Round Shaft (No Gearhead)

- Lead Wire

- 0.36

- 1450

3RK15AA-AWMU

- Electromagnetic Brake Reversible Motor

- 2.76 in. sq.

- 15 W (1/50 HP)

- Single-Phase 110/115 VAC

- Round Shaft (No Gearhead)

- Lead Wire

- 0.91

- 1450

4RK25AA-AWMU

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 110/115 VAC

- Round Shaft (No Gearhead)

- Lead Wire

- 1.48

- 1450

5RK40AA-AWMU

- Electromagnetic Brake Reversible Motor

- 3.54 in. sq.

- 40 W (1/19 HP)

- Single-Phase 110/115 VAC

- Round Shaft (No Gearhead)

- Lead Wire

- 2.26

- 1450

4IK25GN-SWM / 4GN12.5RH

- Electromagnetic Brake Induction Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Three-Phase 200/220/230 VAC

- 12.5 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 10 [60 Hz] 12.7 [200 VAC, 50 Hz]

- 120[200 VAC, 50 Hz] 144 [60 Hz]

4IK25GN-SWM / 4GN3RH

- Electromagnetic Brake Induction Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Three-Phase 200/220/230 VAC

- 3 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 1.6 [60 Hz] 2 [200 VAC, 50 Hz]

- 500[200 VAC, 50 Hz] 600 [60 Hz]

4IK25GN-SWM / 4GN5RH

- Electromagnetic Brake Induction Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Three-Phase 200/220/230 VAC

- 5 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 3.4 [200 VAC, 50 Hz] 2.7 [60 Hz]

- 300[200 VAC, 50 Hz] 360 [60 Hz]

4IK25GN-SWM / 4GN7.5RH

- Electromagnetic Brake Induction Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Three-Phase 200/220/230 VAC

- 7.5 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 6.3 [200 VAC, 50 Hz] 5 [60 Hz]

- 200[200 VAC, 50 Hz] 240 [60 Hz]

4IK25GN-SWM / 4GN25RH

- Electromagnetic Brake Induction Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Three-Phase 200/220/230 VAC

- 25 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 25 [200 VAC, 50 Hz] 20 [60 Hz]

- 60[200 VAC, 50 Hz] 72 [60 Hz]

4IK25GN-SWM / 4GN100RH

- Electromagnetic Brake Induction Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Three-Phase 200/220/230 VAC

- 100 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 70

- 15[200 VAC, 50 Hz] 18 [60 Hz]

4IK25GN-SWM / 4GN150RH

- Electromagnetic Brake Induction Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Three-Phase 200/220/230 VAC

- 150 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 70

- 10[200 VAC, 50 Hz] 12 [60 Hz]

4IK25GN-SWM / 4GN50RH

- Electromagnetic Brake Induction Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Three-Phase 200/220/230 VAC

- 50 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 50 [200 VAC, 50 Hz] 39 [60 Hz]

- 30[200 VAC, 50 Hz] 36 [60 Hz]

4IK25GN-SWM / 4GN75RH

- Electromagnetic Brake Induction Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Three-Phase 200/220/230 VAC

- 75 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 70 [200 VAC, 50 Hz] 60 [60 Hz]

- 20[200 VAC, 50 Hz] 24 [60 Hz]

4RK25GN-AWMU / 4GN12.5RH

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 110/115 VAC

- 12.5 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 11.3

- 144

4RK25GN-AWMU / 4GN3RH

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 110/115 VAC

- 3 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 1.8

- 600

4RK25GN-AWMU / 4GN5RH

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 110/115 VAC

- 5 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 3

- 360

4RK25GN-AWMU / 4GN7.5RH

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 110/115 VAC

- 7.5 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 5.7

- 240

4RK25GN-AWMU / 4GN25RH

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 110/115 VAC

- 25 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 23

- 72

4RK25GN-AWMU / 4GN100RH

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 110/115 VAC

- 100 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 70

- 18

4RK25GN-AWMU / 4GN150RH

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 110/115 VAC

- 150 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 70

- 12

4RK25GN-AWMU / 4GN50RH

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 110/115 VAC

- 50 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 45

- 36

4RK25GN-AWMU / 4GN75RH

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 110/115 VAC

- 75 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 68

- 24

4RK25GN-CWME / 4GN12.5RH

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 220/230 VAC

- 12.5 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 11.3 [60 Hz] 13.6 [50 Hz]

- 120[50 Hz] 144 [60 Hz]

4RK25GN-CWME / 4GN3RH

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 220/230 VAC

- 3 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 1.8 [60 Hz] 2.2 [50 Hz]

- 500[50 Hz] 600 [60 Hz]

4RK25GN-CWME / 4GN5RH

- Electromagnetic Brake Reversible Motor

- 3.15 in. sq.

- 25 W (1/30 HP)

- Single-Phase 220/230 VAC

- 5 :1

- Right-Angle Hollow Shaft Gearhead

- Lead Wire

- 3 [60 Hz] 3.6 [50 Hz]

- 300[50 Hz] 360 [60 Hz]