Will powering this motor with a 12v 2A power supply cause damage? The motor is rated for 12v at 1.68A

No. The IV relation is fixed, meaning when you apply a certain voltage, a corresponding amount of current will flow. Due to the resistances of the windings, when you apply 12 V, only 1.68 A will flow by design. If you try to force 2A, then you will need a higher voltage. With that being said, it is better to use a stepper motor controller IC instead of driving the motor directly from the power supply.

How noisy is this motor?

It has been a long time since I purchased this gear motor and put it service, but do not remember it as being at all noisy.

How much torque is necessary to backdrive this gearbox? I am looking for a backdrivable gearbox.

Are you refering to the gearbox alone or the gearbox plus the motor? The gearbox will simply amplify the amount of torque: if it's a 1:100 gearbox, for backdriving, you need 100 times the torque compared to backdriving the stepper motor shaft directly. As for the actual torque in the presence of the motor, it varies depending on how much current is flowing through the motor. As a crude estimate, even without any current flowing, it is VERY difficult for an average adult male to backdrive the shaft of the gearbox.

Is this kind of motor (with planetary gearbox) necessary for the construction of a syringe pump, or can i use just a nema 17 stepper motor?

I have used the nema 17 stepper motor for making a syringe pump with no gearbox using a leadscrew just fine for up to 25mL syringes. The leadscrew provides sufficient gearing itself. There is a good open source version on university of British Columbia. Possibly a larger syringe would necessitate a gearbox

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STEPPERONLINE 51:1 Precision Camera for Nema 17 High Torque Planetary Gearbox

Product ID: 370303473

Details

Brand
STEPPERONLINE
Model name
gear
Product dimensions
42W x 42H
Speed
4 RPM
Voltage
12 Volts

🎯0.035° ultra-precise step angle

💪4Nm high holding torque

⚙️51:1 planetary gearbox ratio

E£ 11801

Duties & taxes included

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Description

⚙️ Elevate your camera control with precision torque that never quits!

GEARBOX MASTERY - Built-in 50.9:1 planetary gearbox ensures exceptional torque multiplication with minimal backlash (≤1°).
COMPACT YET MIGHTY - NEMA 17 frame size with a solid 620g metal build balances durability and space-saving design.
PLUG PLAY CONFIDENCE - Bipolar 4-wire configuration optimized for constant current drivers ensures reliable, smooth operation.
PRECISION AT EVERY TURN - Experience ultra-smooth motion with a razor-sharp 0.035° step angle for pinpoint accuracy.
TORQUE THAT POWERS YOUR VISION - Delivering a robust 4Nm holding torque, perfect for demanding low-speed, high-torque camera applications.

The STEPPERONLINE 51:1 Precision Camera Stepper Motor combines a high-torque NEMA 17 motor with a 50.9:1 planetary gearbox, delivering ultra-fine 0.035° step resolution and 4Nm holding torque. Designed for professional-grade camera gear applications requiring slow, precise rotation and powerful torque, this compact metal motor offers reliable performance with minimal backlash and a robust bipolar 4-wire interface. Ideal for millennial pros seeking precision and durability in their creative tech setups.

Specifications

ASIN	B00QEVLDVO
Brand	STEPPERONLINE
Brand Name	STEPPERONLINE
Customer Reviews	4.4 out of 5 stars 37 Reviews
Item Dimensions W x H	42W x 42H millimeters
Item Weight	620 Grams
Manufacturer	OSM Technology Co.,Ltd.
Material	Metal
Material Type	Metal
Model	17HS19-1684S-PG51
Model Name	gear
Model name	gear
Part Number	17HS19-1684S-PG51
Product dimensions	42W x 42H millimeters
Speed	4 RPM
UPC	701056517046
Voltage	12 Volts

Reviews

E**E

Works as described

This 50:1 (well, if you are going to be a detail person it's 51:1) gearboxed NEMA 17 works as advertised. My project needed more torque than speed, and this did the trick. Overall, I'm really quite pleased. That said, there are a couple of things about this unit. First, it is quite heavy, considerably more so than the motor alone. I was surprised (maybe I shouldn't have been, but I was.) Second, as another reader pointed out, mounting holes DO NOT follow standard NEMA 17 design. Look at the user guide/spec sheet prior to final design. I don't see points (1) or (2) as negatives. Third, the motor is hard wired rather than have a detachable harness. Minor negative. Fourth, there is a small amount of play/backlash, but the device was within spec. At this price, performance is more than satisfactory. Overall I am happy and would certainly buy again if I needed a gearboxed stepper.

17.07.2020

J**.

Funciona muy bien mucha fuerza, pero ruidoso

23.02.2023

T**M

Langsame Stepps.

Super Teil. Lediglich das leichte Spiel im Planetengetriebe. Welches aber in der Preisklasse zu erwarten ist. Steuer es mit Arduino und einem Stepper online Treiber.

14.01.2021

A**O

Motore passo passo con demoltiplicatore

Arrivato come da previsione. coppia notevole. l'ho utilizzato per automatizzare l'apertura e chiusura di una grance persiana ( 20 mq.)

18.04.2021

B**.

La réduction est vraiment très importante

La réduction est vraiment très importante ce ce fait la vitesse de rotation en sortie est de l'ordre de 14 tours minute au grand maximum

26.03.2023

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