Name: NEMA23 - 1.8 Degree - 2.8A Stepper - 77:1 Gearbox
Brand: Phidgets
SKU: 3334_0
Availability: InStock

PHIDGETS Inc.

Unit 1 - 6115 4 St SE
Calgary AB T2H 2H9
Canada
+1 403 282-7335

NEMA23 - 1.8 Degree - 2.8A Stepper - 77:1 Gearbox

ID: 3334_0

ⓘ

This powerful bipolar stepper with a rear shaft and a gearbox has a 0.023° step angle and 240 kg·cm of torque at low speeds.

$74.00

Quantity Available: 238

Qty	Price
5	$71.04
10	$68.08
25	$66.60
50	$65.12
100	$63.64
50+	...

This NEMA-23 motor has an integrated Planetary gearbox with a 76 49/64:1 ratio. It comes with the rear shaft exposed, so you can mount an encoder or shaft coupler.

At the output of the gearbox, the step angle approximately 0.023°. When using the step angle in calculations, you should derive the exact step angle by dividing 1.8° by the gearbox reduction ratio.

At 2.8 Amps, this stepper motor can produce a maximum torque of 960 kg-cm. However, the gearbox is only rated for 240 kg-cm of continuous torque. Loading this gearbox stepper beyond the torque rating of the gearbox will shorten its useful life.

Note: Connecting the motor directly to a power supply will destroy the motor and void the warranty. It must be used with a constant current / chopper drive controller such as a Phidget stepper controller.

Features

240 kg-cm torque rating
1.8 degree step angle (0.023 degrees after gearbox)
77:1 planetary gearbox
Rated for 2.8A of current
Connects to a Phidgets stepper controller

Connection

This motor must be controlled by a constant current or chopper drive controller. You can find a list of suitable controllers on the Connection & Compatibility tab. There you will also find compatible attachments such as encoders, mounting hardware, and transmission hardware.

Motor Controllers

This motor must be controlled by a stepper motor controller. This diagram shows how to connect the motor wires to the controller to produce a clockwise rotation in the stepper motor when increasing position. To wire for counter-clockwise rotation when increasing position, reverse the red and blue wires.

Note: Make sure to unplug the power cord from the motor controller before switching wires around.

Function	3330	STC1001	1067
A	Black	A	A
Ā	Green	A-	B
B	Red	B	C
B̄	Blue	B-	D

The following stepper controllers can be used to drive this motor:

Product		Controller Properties			Electrical Properties
Part Number	Price	Motor Position Resolution	Stepper Velocity Resolution	Stepper Velocity Max	Available Current per Coil Max
STC1005_0 4A Stepper Phidget	$40.00	¹⁄₁₆ Step (40-Bit Signed)	1 ¹⁄₁₆ steps/sec	115000 ¹⁄₁₆ steps/sec	4 A
STC1002_0 8A Stepper Phidget	$80.00	¹⁄₁₆ Step (40-Bit Signed)	1 ¹⁄₁₆ steps/sec	115000 ¹⁄₁₆ steps/sec	8 A
1067_0B PhidgetStepper Bipolar HC	$90.00	¹⁄₁₆ Step (40-Bit Signed)	1 ¹⁄₁₆ steps/sec	250000 ¹⁄₁₆ steps/sec	4 A

Encoders

The rear shaft of this motor can be equipped with an encoder for applications where you need to keep track of the exact position, velocity, or acceleration of the motor. The mounting holes on the back of this motor are compatible with the following encoders:

Product		Encoder Properties
Part Number	Price	Output Circuit Type	Encoder Resolution	Encoder Speed Max
3531_0 Rotary Encoder - For 4mm Motor Shaft 300 CPR	$25.00	Push-Pull	300 CPR	6000 RPM
ENC4109_0 Rotary Encoder - For 4mm Motor Shaft 40 CPR	$10.00	Push-Pull	40 CPR	6000 RPM

Shaft Couplers

If you need to connect the main shaft of this motor to the shaft of another device, you can use a shaft coupler:

Product		Physical Properties
Part Number	Price	Inner Diameter	Material	Coupling Rated Torque	Coupling Rated Speed	Torsional Stiffness
TRM4317_0 Jaw Coupling Half 12mm Series 12	$3.60	12 mm	Aluminum	35.7 kg·cm	12000 RPM	—
TRM4318_0 Jaw Coupling Half 12mm Series 24	$6.85	12 mm	Aluminum	611.8 kg·cm	4000 RPM	—

Pulleys and Sprockets

If you're using this motor to drive a rotary system that requires a lot of torque, you may be interested in pulleys and sprockets. By using a two pulleys or sprockets of different sizes, you can increase the gear ratio of the motor. Pulleys and sprockets can also be used to transmit the motor's rotation over a long distance. For more guidance on building a transmission system, visit our Rotary Motion Guide. Here is a list of our 12mm bore pulleys and sprockets:

Product		Physical Properties
Part Number	Price	Inner Diameter	Number of Teeth
TRM4139_0 #25 Chain Sprocket with 12mm Bore and 12 Teeth	$3.25	12 mm	10
TRM4140_0 #25 Chain Sprocket with 12mm Bore and 18 Teeth	$3.75	12 mm	18
TRM4141_0 #25 Chain Sprocket with 12mm Bore and 32 Teeth	$5.00	12 mm	32
TRM4142_0 #25 Chain Sprocket with 12mm Bore and 52 Teeth	$8.00	12 mm	52
TRM4107_0 GT2 Pulley with 12mm Bore and 36 Teeth	$3.00	12 mm	36
TRM4108_0 GT2 Pulley with 12mm Bore and 44 Teeth	$3.00	12 mm	44
TRM4109_0 GT2 Pulley with 12mm Bore and 60 Teeth	$3.55	12 mm	60
TRM4110_0 GT2 Pulley with 12mm Bore and 80 Teeth	$4.45	12 mm	80
TRM4144_0 #40 Chain Sprocket with 12mm Bore and 9 Teeth	$4.25	12 mm	9
TRM4145_0 #40 Chain Sprocket with 12mm Bore and 14 Teeth	$4.50	12 mm	14
TRM4146_0 #40 Chain Sprocket with 12mm Bore and 20 Teeth	$7.00	12 mm	20
TRM4120_0 GT5 Pulley with 12mm Bore and 16 Teeth	$3.50	12 mm	16
TRM4121_0 GT5 Pulley with 12mm Bore and 24 Teeth	$4.00	12 mm	24
TRM4122_0 GT5 Pulley with 12mm Bore and 34 Teeth	$5.00	12 mm	34
TRM4123_0 GT5 Pulley with 12mm Bore and 50 Teeth	$7.40	12 mm	50
TRM4124_0 GT5 Pulley with 12mm Bore and 72 Teeth	$12.95	12 mm	72

Rotary Bearings

Systems with heavy loads or pulley/sprocket assemblies often put a lot of sideways strain on the motor shaft. If you're using this motor to drive such a system, you can use rotary bearings to protect the motor:

Product		Physical Properties		Mechanical Properties
Part Number	Price	Inner Diameter	Bearing Type	Static Load	Dynamic Load
TRM4502_0 Flanged Rotary Bearing for 12mm Shaft	$4.00	12 mm	Rotary Shaft (Flanged)	2.4 kN	5.1 kN
TRM4503_0 Pillow Block Rotary Bearing for 12mm Shaft	$4.00	12 mm	Rotary Shaft (Pillow Block)	2.4 kN	5.1 kN

Mounting Brackets

Mounting this motor to a flat surface is easy with these metal mounting brackets. The holes on the bracket match those on the back of the motor, as well as the ones on the front of the gearbox. The following brackets will fit the mounting holes on this motor:

Product		Physical Properties
Part Number	Price	Mounting Plate Size	Material
3339_0 Motor Mounting Bracket (NEMA 23)	$4.00	NEMA - 23	Mild Steel (Coated)

Product Specifications

Motor Properties
Motor Type	Bipolar Stepper
Manufacturer Part Number	57STH56-2804B / 56JXS300K77
Step Angle	0.023°
Step Accuracy	± 5 %
Holding Torque	240 kg·cm
Rated Torque	240 kg·cm
Maximum Motor Speed	10 RPM
Electrical Properties
Recommended Voltage	24 V DC
Rated Current	2.8 A
Coil Resistance	900 mΩ
Phase Inductance	2.5 mH
Physical Properties
Shaft Diameter	12 mm
Keyway Width	4 mm
Rear Shaft Diameter	3.9 mm
Mounting Plate Size	NEMA - 23
Weight	1.5 kg
Number of Leads	4
Wire Length	300 mm
Gearbox Properties
Gearbox Type	Planetary
Gear Ratio	76 ⁴⁹⁄₆₄ : 1
Backlash Error	1 ¹⁄₂°
Maximum Strength of Gears	240 kg·cm
Shaft Maximum Axial Load	100 N
Shaft Maximum Radial Load	250 N
Customs Information
Canadian HS Export Code	8501.10.00
American HTS Import Code	8501.10.40.40
Country of Origin	CN (China)

Documents

Here's a list of our bipolar stepper motors:

Product		Motor Properties			Electrical Properties	Physical Properties		Gearbox Properties
Part Number	Price	Step Angle	Rated Torque	Maximum Motor Speed	Recommended Voltage	Shaft Diameter	Weight	Gear Ratio
3320_0 NEMA11 - 1.8 Degree - 0.67A Stepper - Gearless	$16.00	1.8°	520 g·cm	1300 RPM	24 V DC	5 mm	111.4 g	—
3321_1 NEMA11 - 1.8 Degree - 1.5A Stepper - 27:1 Gearbox	$38.00	0.067°	14 kg·cm	50 RPM	24 V DC	6 mm	217.5 g	26 ¹⁰³⁄₁₂₁ : 1
3322_0 NEMA11 - 1.8 Degree - 0.67A Stepper - 100:1 Gearbox	$38.00	0.018°	32 kg·cm	13 RPM	24 V DC	6 mm	243.6 g	99 ¹⁰⁴⁴⁄₂₀₅₇ : 1
3323_0 NEMA14 - 1.8 Degree - 1A Stepper - Gearless	$16.00	1.8°	1.2 kg·cm	1000 RPM	24 V DC	5 mm	200 g	—
3340_0 NEMA17 - 0.9 Degree - 1.68A Stepper - Gearless	$20.00	0.9°	3.3 kg·cm	400 RPM	24 V DC	5 mm	288 g	—
3324_0 NEMA17 - 1.8 Degree - 1.68A Stepper - Gearless	$16.00	1.8°	3.3 kg·cm	1000 RPM	24 V DC	5 mm	289 g	—
3325_0 NEMA17 - 1.8 Degree - 1.68A Stepper - 5.18:1 Gearbox	$40.00	0.35°	18 kg·cm	200 RPM	24 V DC	8 mm	457 g	5 ²⁄₁₁ : 1
3326_0 NEMA17 - 1.8 Degree - 1.68A Stepper - 14:1 Gearbox	$42.00	0.13°	30 kg·cm	70 RPM	24 V DC	8 mm	502 g	13 ²¹²⁄₂₈₉ : 1
3327_0 NEMA17 - 1.8 Degree - 1.68A Stepper - 27:1 Gearbox	$44.00	0.067°	30 kg·cm	40 RPM	24 V DC	8 mm	503 g	26 ¹⁰³⁄₁₂₁ : 1
3328_0 NEMA17 - 1.8 Degree - 1.68A Stepper - 51:1 Gearbox	$46.00	0.035°	48 kg·cm	20 RPM	24 V DC	8 mm	564 g	50 ⁴³⁹⁷⁄₄₉₁₃ : 1
3329_0 NEMA17 - 1.8 Degree - 1.68A Stepper - 100:1 Gearbox	$48.00	0.018°	48 kg·cm	10 RPM	24 V DC	8 mm	564 g	99 ¹⁰⁴⁴⁄₂₀₅₇ : 1
3330_0 NEMA23 - 0.9 Degree - 2.8A Stepper - Gearless	$28.00	0.9°	11.2 kg·cm	500 RPM	24 V DC	¹⁄₄″	695 g	—
3332_0 NEMA23 - 1.8 Degree - 2.8A Stepper - 4.25:1 Gearbox	$70.00	0.42°	46.6 kg·cm	165 RPM	24 V DC	12 mm	1.2 kg	4 ¹⁄₄ : 1
3333_0 NEMA23 - 1.8 Degree - 2.8A Stepper - 15:1 Gearbox	$72.00	0.12°	150 kg·cm	50 RPM	24 V DC	12 mm	1.3 kg	15 ³⁄₁₀ : 1
3334_0 NEMA23 - 1.8 Degree - 2.8A Stepper - 77:1 Gearbox	$74.00	0.023°	240 kg·cm	10 RPM	24 V DC	12 mm	1.5 kg	76 ⁴⁹⁄₆₄ : 1
3335_0 NEMA34 - 1.8 Degree - 4A Stepper - Gearless	$60.00	1.8°	30 kg·cm	200 RPM	30 V DC	12 mm	1.8 kg	—