Is there an adapter available to fit the 11mm input shaft of a 20:1 speed reducer nmrv030?

They are researching it here, where the motor is sold. Wish I had an answer, but at least I'm not THAT guy.

How many RPMs will the motor run before the torque drops in half?

The torque is highest at a slow 10 RPM. The torque drops linearly at the RPM increase. It starts to skip pulses because of low torque at about 200 RPM. I had to add a 100 tooth to 36 tooth xml timing pulleys to increase the torque.

Where can I get a gear that works with this 10mm shaft? Most of those I've seen are in standard, not metric units.

I've had luck finding pulleys on EBay. I'm not sure about gears but it would be worth a shot if you haven't already looked. Also you could buy something to fit on a 3/8in shaft and drill it out to 10mm.

What is the maximum power output in Watts? I’m sure it’s higher than the 3W they have listed.

Hello, The power is calculated as: P = V *I* # of coils active, or equivalently P = I^2*R* # of coils active For instance, if only one coil is active, P=4.2^2*0.9*1 = 15.87 watts If two coils are active, such as when the motor is holding a position, then the power doubles, which comes down to 31.75 watts. Hope this helps, Hector

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STEPPERONLINE High Torque Nema 23 CNC Stepper Motor 114mm 425oz.in/3Nm CNC Mill Lathe Router

STEPPERONLINE High Torque Nema 23 CNC Stepper Motor 114mm 425oz.in/3Nm CNC Mill Lathe Router

Product ID: 9287539

Details

Brand
STEPPERONLINE
Horsepower
3 watts
Model Name
23HS45-4204S
Speed
1000 rpm
Voltage
36

📏Compact 57x57mm NEMA 23 frame

🔄Precise 1.8° step angle (200 steps/rev)

⚙️3Nm (425oz.in) torque powerhouse

¥20811

Duties & taxes included

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Sold byAmazon JapanDelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

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Description

⚡ Power your CNC projects with torque that means business!

DURABLE METAL ALLOY BUILD - Engineered with premium steel, aluminum, and copper for long-lasting reliability.
ROBUST 4 2 A CURRENT RATING - Delivers consistent power for demanding industrial applications.
SMOOTH ACCURATE MOTION CONTROL - 1.8° step angle ensures ultra-fine positioning for flawless cuts.
UNMATCHED TORQUE FOR HEAVY DUTY CNC - 425oz.in holding torque powers through the toughest milling and routing tasks.
PRECISION ENGINEERING IN A COMPACT FRAME - NEMA 23 size fits seamlessly into your CNC setup without bulk.

The STEPPERONLINE High Torque Nema 23 Stepper Motor delivers a commanding 3Nm (425oz.in) holding torque with a precise 1.8° step angle, housed in a compact 57x57mm frame. Rated at 4.2A per phase and built from premium metal alloys, this bipolar stepper motor is engineered for professional CNC mills, lathes, and routers demanding high performance and reliability.

Specifications

ASIN	B00PNEPW4C
Best Sellers Rank	#124,538 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #49 in Electrical Motor Controls
Brand Name	STEPPERONLINE
Customer Reviews	4.7 4.7 out of 5 stars (435)
Horsepower	3 watts
Item Dimensions W x H	4.45"W x 2.24"H
Item Weight	3.7 pounds
Manufacturer	STEPPERONLINE
Material Type	Alloy Steel, Aluminum, Copper, Metal
Model	23HS45-4204S
Model Name	23HS45-4204S
Part Number	FBA_23HS45-4204S
Speed	1000 rpm
UPC	701056340255 715624558850
Voltage	36 volts_of_direct_current

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