Products for USB Sensing and Control

Products for USB Sensing and Control

NEMA-17 Bipolar 26.85:1 Planetary Gearbox Stepper

ID: 3318_1
This bipolar stepper with planetary gearbox has a 0.067° step angle and 30 kg·cm of torque at low speeds.

Discontinued
Replaced by the 3327_0, a similarly sized motor.

This NEMA-17 motor has an integrated Planetary gearbox with a 26 103/121 :1 ratio. At 1.68 Amps (maximum current), this gearbox stepper can produce a maximum torque of 77 kg-cm. However, the gearbox is only rated for 30 kg-cm of continuous torque, and 80 kg-cm for brief overloads. Loading this gearbox stepper beyond the torque rating of the gearbox will shorten its useful life.

When connected to a 1067 - PhidgetStepper Bipolar HC, the 3318 has a maximum speed of approximately 174 RPM. At the output of the gearbox, the step angle is a little under 0.07°. When using the step angle in calculations, you should derive the exact step angle by dividing 1.8° by the gearbox reduction ratio.

This particular revision of the 3318 is made by a different manufacturer, but should behave very similarly to the revision 0 version.

Product Specifications

Motor Properties
Motor Type Bipolar Stepper
Manufacturer Part Number 42STH38-1684A / 36JXS30K27G
Step Angle 0.067°
Step Accuracy 5 %
Holding Torque 30 kg·cm
Rated Torque 30 kg·cm
Maximum Speed (w/1063 Motor Controller) 22 RPM
Maximum Speed (w/1067 Motor Controller) 174 RPM
Acceleration at Max Speed
(w/1067 Motor Controller)
600000 1/16 steps/sec²
Electrical Properties
Recommended Voltage 12 V DC
Rated Current 1.7 A
Coil Resistance 1.7 Ω
Phase Inductance 3.2 mH
Physical Properties
Shaft Diameter 8 mm
Mounting Plate Size NEMA - 17
Weight 503 g
Number of Leads 4
Wire Length 300 mm
Gearbox Properties
Gearbox Type Planetary
Gear Ratio 26 103121 : 1
Backlash Error
Maximum Strength of Gears 30 kg·cm
Shaft Maximum Axial Load 49.1 N
Shaft Maximum Radial Load 98.1 N

The 3318 stepper motor connects to a bipolar motor controller such as the 1067 - PhidgetStepper Bipolar HC.

The following table shows how to connect the motor wires to the board connectors 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.


Wire Color Black Green Red Blue
Board Connector A B C D

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



Warning


warning Connecting the motor directly to a power supply will destroy the motor and void the warranty. If you want to check your motor make sure it is connected to a constant current / chopper drive controller.