Are caps included to fit on the shaft?

No, I connect the shaft with the same diameter copper tube. then I crimp the tube so it fits snugly to the flat side if the shaft. I use a copper tube instead of brass, its easier to solder and is available through amazon. The copper tube makes it easy to connect things to the shaft. Hope this helps.

what batteries can I use with these motors?

Any battery above 3volts will work.

What is the shaft speed (RPM) at 6 volts?

most motors are differant, Put a plastic disc on the shaft and hook the motor up to a variable pwr supply, you will get all the answers you need includeing current draw

Acxico 3Pcs Mini Micro N20 Gear Motor DC 3V-6V Slow Speed Full Metal Gearbox DIY Robot Car

产品编号: 700783695

细节

Brand
Acxico
Model name
gear
Speed
52 RPM
Voltage
3 Volts 6
Horsepower
1 hp

⚡3V-6V Voltage

🔩3mm Shaft Diameter

⚙️Full Metal Gearbox

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S$45

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描述

🚀 Gear Up for Innovation!

PACK OF THREE - Get more value with three motors in one package!
ROBUST BUILD QUALITY - Full metal gearbox ensures durability and longevity.
PRECISION ENGINEERING - Crafted with a 3mm D-type shaft for optimal performance.
UNLEASH YOUR CREATIVITY - Perfect for DIY robot car enthusiasts!
VERSATILE VOLTAGE RANGE - Operates smoothly between 3V to 6V for varied applications.

The Acxico 3Pcs Mini Micro N20 Gear Motor is designed for DIY enthusiasts, featuring a versatile voltage range of 3V-6V, a durable full metal gearbox, and a precision 3mm D-type shaft. Ideal for building custom robot cars, this pack of three motors offers exceptional value and performance.

规格

ASIN	B09DG3GCGK
Best Sellers Rank	#30,872 in Toys & Games ( See Top 100 in Toys & Games ) #4 in RC Electric Motors
Brand Name	Acxico
Customer Reviews	4.6 4.6 out of 5 stars (199)
Horsepower	1 Horsepower
Included Components	Motor
Item Dimensions W x H	0.47"W x 0.39"H
Manufacturer	Acxico
Material Type	Metal
Model	YY640
Model Name	gear
Speed	104 RPM
UPC	735209935333
Voltage	3 Volts, 6 Volts

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