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Variants

Stepper Motors Series DM1220

Two phase with Disc Magnet, 20 steps per revolution
microstepping motor

Key Features

Holding torque at boosted current:

4.1 mNm

Step angle (full step):

18 °

Diameter:

12 mm

Length:

17.6 mm

Advantages

Cost effective positioning drive without encoder

High power density

Very high acceleration

Extremely fast change of direction possible

Long-lasting

Wide operating temperature range

Full-, half- and micro-stepping operation possible

Extremely low rotor inertia

Variants:

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.33 A
Boosted current per phase (both phases ON)		0.66 A
Phase resistance		4.5 Ω
Phase inductance (1 kHz)		1.3 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		1.7 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.33 A
Boosted current per phase (both phases ON)		0.66 A
Phase resistance		4.5 Ω
Phase inductance (1 kHz)		1.3 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		1.7 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.33 A
Boosted current per phase (both phases ON)		0.66 A
Phase resistance		4.5 Ω
Phase inductance (1 kHz)		1.3 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		1.7 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.33 A
Boosted current per phase (both phases ON)		0.66 A
Phase resistance		4.5 Ω
Phase inductance (1 kHz)		1.3 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		1.7 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.33 A
Boosted current per phase (both phases ON)		0.66 A
Phase resistance		4.5 Ω
Phase inductance (1 kHz)		1.3 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		1.7 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.22 A
Boosted current per phase (both phases ON)		0.44 A
Phase resistance		10.4 Ω
Phase inductance (1 kHz)		3.5 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		2.6 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.22 A
Boosted current per phase (both phases ON)		0.44 A
Phase resistance		10.4 Ω
Phase inductance (1 kHz)		3.5 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		2.6 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.22 A
Boosted current per phase (both phases ON)		0.44 A
Phase resistance		10.4 Ω
Phase inductance (1 kHz)		3.5 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		2.6 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.22 A
Boosted current per phase (both phases ON)		0.44 A
Phase resistance		10.4 Ω
Phase inductance (1 kHz)		3.5 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		2.6 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.22 A
Boosted current per phase (both phases ON)		0.44 A
Phase resistance		10.4 Ω
Phase inductance (1 kHz)		3.5 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		2.6 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.11 A
Boosted current per phase (both phases ON)		0.22 A
Phase resistance		41 Ω
Phase inductance (1 kHz)		13 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		5 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.11 A
Boosted current per phase (both phases ON)		0.22 A
Phase resistance		41 Ω
Phase inductance (1 kHz)		13 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		5 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.11 A
Boosted current per phase (both phases ON)		0.22 A
Phase resistance		41 Ω
Phase inductance (1 kHz)		13 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		5 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.11 A
Boosted current per phase (both phases ON)		0.22 A
Phase resistance		41 Ω
Phase inductance (1 kHz)		13 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		5 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.11 A
Boosted current per phase (both phases ON)		0.22 A
Phase resistance		41 Ω
Phase inductance (1 kHz)		13 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		5 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.055 A
Boosted current per phase (both phases ON)		0.11 A
Phase resistance		168 Ω
Phase inductance (1 kHz)		57 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		10 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.055 A
Boosted current per phase (both phases ON)		0.11 A
Phase resistance		168 Ω
Phase inductance (1 kHz)		57 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		10 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.055 A
Boosted current per phase (both phases ON)		0.11 A
Phase resistance		168 Ω
Phase inductance (1 kHz)		57 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		10 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.055 A
Boosted current per phase (both phases ON)		0.11 A
Phase resistance		168 Ω
Phase inductance (1 kHz)		57 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		10 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Values at 22° and nominal voltage		Value
Nominal current per phase (both phases ON)		0.055 A
Boosted current per phase (both phases ON)		0.11 A
Phase resistance		168 Ω
Phase inductance (1 kHz)		57 mH
Holding torque (at nominal current in both phases)		2.4 mNm
Holding torque at boosted current		4.1 mNm
Residual torque, typ.		0.07 mNm
Back-EMF amplitude		10 V/k step/s
Electrical time constant		0.28 ms
Rotor inertia		18.5 ·10⁻⁹ kgm²
Step angle (full step)		18 °
Angular accuracy		3 %
Angular acceleration, max.		221 ·10³ rad/s²
Resonance frequency (at no load)		55 Hz
Thermal resistance		11.9 / 46.5 K/W
Thermal time constant		5 / 300 s
Operating temperature range		-35 ... 70 °C
Winding temperature, max.		130 °C
Housing material		aluminium, black anodized
Mass		9 g
Magnet material		NdFeB

Recommended operation areas

Relevant for 2 phases ON only. On PWM drivers or chopper (current mode), the current is set to the nominal value and the supply voltage is typically 2.5 to 5x higher than the nominal voltage.

Curves measured with a load inertia of 20·10^-9 kgm², in half-step mode for the “1 x nominal voltage” curve, in 1/4 microstepping mode for the other curves.

Recommended operation areas

Relevant for 2 phases ON only. On PWM drivers or chopper (current mode), the current is set to the nominal value and the supply voltage is typically 2.5 to 5x higher than the nominal voltage.

Curves measured with a load inertia of 20·10^-9 kgm², in half-step mode for the “1 x nominal voltage” curve, in 1/4 microstepping mode for the other curves.

Recommended operation areas

Relevant for 2 phases ON only. On PWM drivers or chopper (current mode), the current is set to the nominal value and the supply voltage is typically 2.5 to 5x higher than the nominal voltage.

Curves measured with a load inertia of 20·10^-9 kgm², in half-step mode for the “1 x nominal voltage” curve, in 1/4 microstepping mode for the other curves.

Recommended operation areas

Relevant for 2 phases ON only. On PWM drivers or chopper (current mode), the current is set to the nominal value and the supply voltage is typically 2.5 to 5x higher than the nominal voltage.

Curves measured with a load inertia of 20·10^-9 kgm², in half-step mode for the “1 x nominal voltage” curve, in 1/4 microstepping mode for the other curves.

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Application note

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AN 001 - Stepper motor basics

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AN 002 - Reading and understanding a torque curve

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AN 003 - Drivers and controllers: how to drive a stepper motor?

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AN 004 - When and why using an encoder

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AN 005 - Stepper motors and Gearheads

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AN 006 - How to get a linear motion from a stepper motor?

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AN 006-001 - Linear motion – Maximal axial loads

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AN 006 - Lead Screw

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AN 007 - Recommendations for soldering a cable on a stepper motor

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AN 008 - Thermal behavior of a stepper motor

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AN 009 - Choosing the proper lubricant

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AN 010 - Cables and connectors options

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AN 011 - Final quality control data

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AN 012 - Custom solutions (A and E number)

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AN 013 - Improving reliability: redundant stepper motor

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AN 014 - Using the stepper motor HTML animation

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AN 015 - Microstepping

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AN 020 - Large DM Steppers connection

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AN 022 - Torque and Temperature Calculator user guide

Your Choice

Selected Variant

Series DM12202R033051

Two phase with Disc Magnet, 20 steps per revolution
microstepping motor

Key Features

Holding torque at boosted current: 4.1 mNm

Step angle (full step): 18 °

Diameter: 12 mm

Length: 17.6 mm

Selected Variant

Series DM12202R022051

Two phase with Disc Magnet, 20 steps per revolution
microstepping motor

Key Features

Holding torque at boosted current: 4.1 mNm

Step angle (full step): 18 °

Diameter: 12 mm

Length: 17.6 mm

Selected Variant

Series DM12202R011051

Two phase with Disc Magnet, 20 steps per revolution
microstepping motor

Key Features

Holding torque at boosted current: 4.1 mNm

Step angle (full step): 18 °

Diameter: 12 mm

Length: 17.6 mm

Selected Variant

Series DM12202R005551

Two phase with Disc Magnet, 20 steps per revolution
microstepping motor

Key Features

Holding torque at boosted current: 4.1 mNm

Step angle (full step): 18 °

Diameter: 12 mm

Length: 17.6 mm

Stepper Motors Series DM1220

Two phase with Disc Magnet, 20 steps per revolutionmicrostepping motor

Two phase with Disc Magnet, 20 steps per revolution
microstepping motor