what size is the screws? also if it is metric or imperial.

The bracket screws are M5 x 0.8

On the label "power". Which screw is plus and which screw is minus? They are labeled 5 and 6.

Those are for main AC voltage in (110V/220V from the wall) there is no + nor -

brackets--how many? I need 2

There is one bracket (as shown). Not sure why you need two brackets, the one that is included is sturdy enough (it is solid aluminum) to stabilize the motor.

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500W CNC Air Cooled Spindle Motor ER11 12000RPM | with Input Voltage AC110V-220V Speed Controller with Power Supply + 52mm Clamp for CNC Router Milling Machine

Product ID: 165407226

Details

Brand
RATTMMOTOR
Horsepower
500 Watts
Material
Stainless
Speed
12000 RPM
Voltage
220 Volts

⚡500W high power output

🔄12000 RPM max speed

🌬️Air-cooled for long runtime

$196.79

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Description

⚙️ Power your CNC projects with precision and unstoppable speed!

SPEED THAT ADAPTS - Variable 2000-12000 RPM with pulse width tech ensures ultra-stable rotation
COOL UNDER PRESSURE - Integrated air cooling fan keeps the spindle running quietly and reliably for hours
SAFE SMOOTH START - Soft start and overcurrent protection safeguard your machine and workflow
GLOBAL VOLTAGE READY - Supports AC110V-220V ±10% for worldwide compatibility and convenience
PRECISION AT PEAK POWER - 500W motor delivers robust torque for flawless milling performance

The RATTMMOTOR 500W CNC Air Cooled Spindle Motor features a high-performance 500W motor capable of speeds up to 12000 RPM, supported by a variable speed controller with global voltage compatibility (AC110V-220V). Its air-cooled design ensures quiet, long-duration operation, while built-in safety features like soft start and overcurrent protection provide reliable and stable milling for professional CNC router applications.

Specifications

ASIN	B07ZHFV4N5
Best Sellers Rank	#254,785 in Industrial & Scientific ( See Top 100 in Industrial & Scientific ) #258 in Motor Speed Controllers
Brand Name	RATTMMOTOR
Customer Reviews	4.4 4.4 out of 5 stars (45)
Horsepower	500 Watts
Item Weight	1.67 Kilograms
Manufacturer	RTM
Material Type	Stainless Steel
Shaft Diameter	16 Millimeters
Speed	12000 RPM
UPC	769135311916
Voltage	220 Volts

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$196.79

Duties & taxes included

In stock

Sold byAmazon USADelivered byDesertcartCustomer service byDesertcartReturns14 days · 30 with PRO

Buyer Protection · Full refund if your order doesn't arrive as described.

Desertcart purchases this item on your behalf and handles shipping, customs, and support to USA.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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Excellent communication throughout the order process. Product is perfect.

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