what is the shaft length?

I`m not 100% sure but should be round 19mm

Is this a bipolar stepper?

Yes, you will a good stepper driver to run them

what maximum temperature could this stepper reach without causing damage to the stepper?

I do not know I have had them hot enough that you did not want to put your hands on them for every long and they are still running

Hi guys, i have two questions: what is the rpm of this motor and can i use that in a robot?

I mean, steppers in general don’t have a high rpm. Possibly gear it to fit your needs? You set the rpm via the stepper and controller. You can use anything for everything. How well it works, and if it’s logical, is up to you. If not, a regular dc motor and encoder would work better. Good results require hard work and trial and error. Good luck!

Nema 23 Stepper Motor 2.8A 1.9Nm (269oz.in) 76mm Length with 8mm Diameter of Shaft for CNC Mill Lathe Route(8mm Shaft)

Product ID: 269517943

Details

Brand
Material
Copper
Product dimensions
6.4W x 7.6H
Speed
1.9 RPM
Voltage
36 Volts

📏76mm compact length

🔩8mm precision shaft

⚙️1.9Nm torque power

€ 96.02

Duties & taxes included

In stock

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Details

Brand
Material
Copper
Product dimensions
6.4W x 7.6H

Description

⚙️ Elevate your CNC game with torque that means business!

BUILT TO LAST - Crafted with premium copper materials and weighing 1.1kg, designed for durability in demanding environments.
COMPACT YET MIGHTY - At just 76mm length, fits seamlessly into tight machine builds without sacrificing performance.
OPTIMIZED VOLTAGE RANGE - Supports 24-50VDC with recommended 3.5A+ drivers for consistent, efficient power delivery.
ENGINEERED FOR STABILITY - 8mm diameter shaft ensures reliable coupling and minimal vibration during high-speed milling.
POWERFUL PRECISION TORQUE - Delivers a robust 1.9Nm (269oz.in) torque for smooth, high-accuracy CNC operations.

The Nema 23 Stepper Motor by HobbyUnlimited offers a powerful 1.9Nm torque in a compact 76mm frame, featuring an 8mm precision shaft ideal for CNC mills, lathes, and routers. Designed for professional-grade performance, it operates efficiently within a 24-50VDC range and weighs 1.1kg, making it a reliable choice for precision machining tasks.

Specifications

ASIN	B07Y81FF3V
ASIN	B07Y81FF3V
Brand Name	HobbyUnlimited
Date First Available	11 October 2019
Item Dimensions W x H	6.4W x 7.6H centimeters
Item Weight	1.03 Kilograms
Manufacturer	HobbyUnlimited
Manufacturer	HobbyUnlimited
Material Type	Copper
Product Dimensions	6.35 x 6.35 x 7.62 cm; 1.03 kg
Speed	1.9 RPM
Voltage	36 Volts

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