• Bipolar Stepper with 99.51:1 Gearbox (42STH38 NEMA-17)

This NEMA-17 motor has an integrated Planetary gearbox with a 991044/2057 :1 ratio.It comes with the rear shaft exposed, so you can mount an encoder or shaft coupler.

When connected to a 1067 - PhidgetStepper Bipolar HC, the 3329 has a maximum speed of 34 RPM. At the output of the gearbox, the step angle is approximately 0.018°. When using the step angle in calculations, you should derive the exact step angle by dividing 1.8° by the gearbox reduction ratio.

At 1.7 Amps, this gearbox stepper can produce a maximum torque of 250 kg-cm. However, the gearbox is only rated for 48 kg-cm of continuous torque, and 100 kg-cm for brief overloads. Loading this gearbox stepper beyond the torque rating of the gearbox will shorten its useful life.


Motor Properties

Motor Type Bipolar Stepper
Manufacturer Part Number 42STH38-1684B / 36JXS60K99.51
Step Angle 0.018°
Step Accuracy ± 5 %
Holding Torque 48 kg·cm
Rated Torque 48 kg·cm
Maximum Speed (w/1067 Motor Controller) 34 RPM
Acceleration at Max Speed
(w/1067 Motor Controller)
1.2E+06 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 H

Physical Properties

Shaft Diameter 8 mm
Rear Shaft Diameter 3.9 mm
Mounting Plate Size NEMA - 17
Weight 564 g
Number of Leads 4
Wire Length 300 mm

Gearbox Properties

Gearbox Type Planetary
Gear Ratio 99 10442057 : 1
Backlash Error 1 12°
Maximum Strength of Gears 48 kg·cm
Shaft Maximum Axial Load 49.1 N
Shaft Maximum Radial Load 98.1 N


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Bipolar Stepper with 99.51:1 Gearbox (42STH38 NEMA-17)

  • Brand: Phidgets
  • Product Code: 3329
  • Availability: In Stock
  • 63.74€

  • Ex Tax: 52.68€

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