3.35 in. (85 mm) / 3.54 in. (90 mm) SMK Series Low Speed Synchronous Motors

Low-speed synchronous motors provide highly precise speed regulation, low-speed rotation, and quick bi-directional rotation. The basic construction of low-speed synchronous motors is the same as that of stepper motors.

3.35 in. (85 mm) / 3.54 in. (90 mm) Frame Size
Single-Phase 100/115 VAC
Holding Torque

Round Shaft = 5.1 ~ 12.6 oz-in (36 ~ 89 mN·m)
Parallel Shaft Gear = 12.3 ~ 88 lb-in (1.4 ~ 10 N·m)

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Item #	Frame Size	Power Supply	Shaft/Gear Type	Gear Ratio (X:1)	Output Shaft Diameter	Rated Torque	Rated Speed (rpm)	Web Price	Add To Cart / Contact Sales

SMK5100A-AA	- 3.35 in85 mm	- Single-Phase 100-115 VAC	- Round Shaft (No Gearhead)	-	- 1/2 in.	- 8.875 lb-in [50 Hz] 9.75 lb-in [60 Hz] 1 N·m [50 Hz] 1.1 N·m [60 Hz]	- 60 [50 Hz] 72 [60 Hz]	$198.00	Add To Cart Request Quote
SMK5160A-AA	- 3.35 in85 mm	- Single-Phase 100-115 VAC	- Round Shaft (No Gearhead)	-	- 1/2 in.	- 13.75 lb-in [50 Hz] 18.125 lb-in [60 Hz] 1.6 N·m [50 Hz] 2.1 N·m [60 Hz]	- 60 [50 Hz] 72 [60 Hz]	$287.00	Add To Cart Request Quote
SMK550A-GN / 5GN3SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 3 :1	- 1/2 in.	- 12.3 lb-in 1.4 N·m	- 20 [50 Hz] 24 [60 Hz]	$322.00	Add To Cart Request Quote
SMK550A-GN / 5GN3.6SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 3.6 :1	- 1/2 in.	- 15 lb-in 1.7 N·m	- 16.67 [50 Hz] 20 [60 Hz]	$322.00	Add To Cart Request Quote
SMK550A-GN / 5GN5SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 5 :1	- 1/2 in.	- 20 lb-in 2.3 N·m	- 14.4 [60 Hz] 12 [50 Hz]	$322.00	Add To Cart Request Quote
SMK550A-GN / 5GN6SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 6 :1	- 1/2 in.	- 24 lb-in 2.8 N·m	- 10 [50 Hz] 12 [60 Hz]	$322.00	Add To Cart Request Quote
SMK550A-GN / 5GN7.5SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 7.5 :1	- 1/2 in.	- 30 lb-in 3.5 N·m	- 9.6 [60 Hz] 8 [50 Hz]	$322.00	Add To Cart Request Quote
SMK550A-GN / 5GN9SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 9 :1	- 1/2 in.	- 38 lb-in 4.3 N·m	- 8 [60 Hz] 6.67 [50 Hz]	$322.00	Add To Cart Request Quote
SMK550A-GN / 5GN12.5SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 12.5 :1	- 1/2 in.	- 39 lb-in 4.5 N·m	- 5.76 [60 Hz] 4.8 [50 Hz]	$322.00	Add To Cart Request Quote
SMK550A-GN / 5GN15SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 15 :1	- 1/2 in.	- 44 lb-in 5 N·m	- 4.8 [60 Hz] 4 [50 Hz]	$322.00	Add To Cart Request Quote
SMK550A-GN / 5GN18SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 18 :1	- 1/2 in.	- 53 lb-in 6 N·m	- 4 [60 Hz] 3.33 [50 Hz]	$322.00	Add To Cart Request Quote
SMK550A-GN / 5GN25SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 25 :1	- 1/2 in.	- 66 lb-in 7.5 N·m	- 2.88 [60 Hz] 2.4 [50 Hz]	$334.00	Add To Cart Request Quote
SMK550A-GN / 5GN30SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 30 :1	- 1/2 in.	- 79 lb-in 9 N·m	- 2.4 [60 Hz] 2 [50 Hz]	$334.00	Add To Cart Request Quote
SMK550A-GN / 5GN36SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 36 :1	- 1/2 in.	- 79 lb-in 9 N·m	- 2 [60 Hz] 1.67 [50 Hz]	$334.00	Add To Cart Request Quote
SMK550A-GN / 5GN50SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 50 :1	- 1/2 in.	- 88 lb-in 10 N·m	- 1.44 [60 Hz] 1.2 [50 Hz]	$347.00	Add To Cart Request Quote
SMK550A-GN / 5GN60SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 60 :1	- 1/2 in.	- 88 lb-in 10 N·m	- 1.2 [60 Hz] 1 [50 Hz]	$347.00	Add To Cart Request Quote
SMK550A-GN / 5GN75SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 75 :1	- 1/2 in.	- 88 lb-in 10 N·m	- 0.96 [60 Hz] 0.8 [50 Hz]	$347.00	Add To Cart Request Quote
SMK550A-GN / 5GN90SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 90 :1	- 1/2 in.	- 88 lb-in 10 N·m	- 0.8 [60 Hz] 0.67 [50 Hz]	$347.00	Add To Cart Request Quote
SMK550A-GN / 5GN100SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 100 :1	- 1/2 in.	- 88 lb-in 10 N·m	- 0.72 [60 Hz] 0.6 [50 Hz]	$347.00	Add To Cart Request Quote
SMK550A-GN / 5GN120SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 120 :1	- 1/2 in.	- 88 lb-in 10 N·m	- 0.6 [60 Hz] 0.5 [50 Hz]	$347.00	Add To Cart Request Quote
SMK550A-GN / 5GN150SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 150 :1	- 1/2 in.	- 88 lb-in 10 N·m	- 0.48 [60 Hz] 0.4 [50 Hz]	$347.00	Add To Cart Request Quote
SMK550A-GN / 5GN180SA	- 3.54 in90 mm	- Single-Phase 100-115 VAC	- Parallel Shaft Gearhead	- 180 :1	- 1/2 in.	- 88 lb-in 10 N·m	- 0.4 [60 Hz] 0.33 [50 Hz]	$347.00	Add To Cart Request Quote

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Item #

Frame Size

Power Supply

Shaft/Gear Type

Gear Ratio (X:1)

Output Shaft Diameter

Rated Torque

Rated Speed (rpm)

Web Price

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No Preference
3
3.6
5
6
7.5
9
12.5
15
18
25
30
36
50
60
75
90
100
120
150
180

No Preference
16.67
9.6
8
6.67
4.8
4
3.33
2.40
2
1.67
1.44
1.2
1
0.72
0.6
0.5
14.4
5.76
2.88
0.96
0.8
0.67
0.48
0.4
0.33
72
60
24
20
12
10