Series
Model

Holding Torque
N.m +-10%

Rated
Current
A/phase

Resistance
ohm/phase +-10%

Inductance
mH/phase +-20%

Rotor Inertia
(g.cm 2 )

Motor
Weight
(kg)

Motor
Lenth
(mm)

Lead
Wire
(NO.)

23HM242-21-8A

Parallel

0.56

3.0

0.53

1.6

120

0.5

42

8

Series

0.56

1.5

2.12

6.4

Unipolar

0.4

2.1

1.06

1.6

23HM242-20-4A

0.56

2.0

1.40

3.4

120

0.5

42

4

23HM242-30-6A

0.4

3.0

0.53

0.7

120

0.5

42

6

23HM251-21-8A

Parallel

0.9

3.0

0.68

3.0

200

0.65

51

8

Series

0.9

1.5

2.72

12

Unipolar

0.65

2.1

1.36

3.0

23HM251-20-4A

0.9

2.0

1.76

6.6

200

0.65

51

4

23HM255-21-8A

Parallel

1.1

3.0

0.73

3.8

280

0.70

55

8

Series

1.1

1.5

2.92

15

Unipolar

0.8

2.1

1.46

3.8

23HM255-20-4A

1.1

2.0

1.88

8.2

280

0.70

55

4

23HM276-21-8A

Parallel

1.7

3.0

1.0

6.0

480

1.0

76

8

Series

1.7

1.5

4.0

24

Unipolar

1.2

2.1

2.0

6.0

23HM276-20-4A

1.7

2.0

2.6

13

480

1.0

76

4