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3329_0 42STH38 NEMA-17 Bipolar Stepper with 99.51:1 Gearbox

Product Code: 3329
Excl. VAT: £43.74 Incl. VAT: £52.49
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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.

This bipolar stepper with a rear shaft and a planetary gearbox has a 0.018° step angle and 48 kg·cm of torque at low speeds.

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.

The mounting holes on this motor are compatible with the 3338 nema 17 mounting bracket. The 3329 stepper motor connects to a bipolar motor controller such as the 1067 - PhidgetStepper Bipolar HC.

The following diagram 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.

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

Mechanical Drawing

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

FeeFo Reviews

Date / Score
Customer Comment Our Response
12-Apr-2016 Product:
Does what it says on the tin - surprisingly good range of motor/gearbox combos
Read more reviews on Feefo
Feefo reviews 100% 2

Whenever possible, items which are in stock are dispatched the same day, or the next working day.

Large and/or heavy items are dispatched by UPS courier service and these orders must be placed before 15:00hrs (GMT) to ensure same day dispatch.

Small items are normally sent using a Royal Mail service for UK orders, and International Airmail or UPS for overseas orders

Returns Policy

3329_0 - 42STH38 NEMA-17 Bipolar Stepper with 99.51:1 Gearbox