AC Motors & Gearmotors

Low-Speed Synchronous Rotation

The motor rotates at a speed proportional to and accurately synchronized with the frequency of the power supply. A fluctuation in load does not affect the rotation speed.

• At 50 Hz 60 r/min (30 r/min for SMK014MA-*)
• At 60 Hz 72 r/min (36 r/min for SMK014MA-*)

Precise Positioning

The motor can be stopped instantly by turning off the power supply. The stopping accuracy within the motor's permissible load inertia is ±10°.

Vertical Applications

Constant speed can be maintained even during lowering operations. Low-speed synchronous motors are suitable for applications where vertical operation at a constant speed is required.

Continuous Rated Capacitor-Run Motor

This is a capacitor-run motor that can be driven by a capacitor only. (An external resistance is needed for SMK5 type). This can be driven at a continuous rating even when bi-directional operation is required.

Superb Starting, Stopping, and Reversing Characteristics

If operated within the permissible load inertia, the motor can start, stop and reverse with 1.5 cycles (0.03 sec at 50 HZ, 0.025 sec at 60 Hz) of the power supply frequency.

Holding Torque

Since a permanent-magnet, multi-poled rotor is used, the motor has holding torque even when the motor is not energized. When used with a gearhead, comparatively high holding torque can be utilized. (When a larger holding torque is required, a DC power supply can be connected as soon as the AC power supply is cut off.)

Long Life, Low Noise GN-S Gearhead Available

The new "long life, low noise GN-S gearhead" achieves a long rated life of 10,000 hours, twice the level of a conventional gearhead, by adopting innovative technologies and structure. Parallel Shaft models.

Select Power Supply below to view available products.

Product Lineup

Type	Frame Size	Power Supply	Holding Torque	Motor Speed
Parallel Shaft Geared	1.65 in. (42 mm)	Single-Phase 100/115 VAC	1.32 ~ 4.9 lb-in (0.15 ~ 0.56 N·m)	72 r/min (60 Hz) 60 r/min (50 Hz)
	2.36 in. (60 mm)	Single-Phase 100/115 VAC	3.5 ~ 26 lb-in (0.4 ~ 3 N·m)
	3.54 in. (90 mm)	Single-Phase 100/115 VAC	12.3 ~ 88 lb-in (1.4 ~ 10 N·m)

Type	Output Power	Power Supply	Holding Torque	Motor Speed
Round Shaft (No Gear)	1.65 in. (42 mm)	Single-Phase 100/115 VAC	0.63 ~ 1.27 oz-in (4.5 ~ 9 mN·m)	72 r/min (60 Hz)* 60 r/min (50 Hz)*
	2.22 in. (56.4 mm)	Single-Phase 100/115 VAC	3.5 oz-in (25 mN·m)
	3.35 in. (85 mm)	Single-Phase 100/115 VAC	5.1 ~ 12.6 oz-in (36 ~ 89 mN·m)

View Products = View all SMK Series Low-Speed Synchronous Motors

*Motor Speed for SMK014MA-A is 36 r/min (60 Hz) and 30 r/min (50 Hz)

NOTE: Motor includes capacitor and capacitor cap. SMK5 type also includes external resistor.

Motor & Gearhead ship separately and must be assembled (except for SMK0A-_A models).

Build a complete system online by selecting your base motor and adding all necessary accessories and/or controller.

CR Circuit for Surge Suppression

This product is used to protect the contacts of the relay or switch used in the forward / reverse circuit section or the instantaneous stop circuit section of a motor.

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