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 12000RMP + Input Voltage AC110V-220V Speed Controller with Power Supply + 52mm Clamp for CNC Router Milling Machine

Product ID: 313831104

Details

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

⚡500W high power output

🔄12,000 RPM max speed

🌬️Air-cooled for nonstop performance

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Description

⚙️ Elevate your CNC game with power, precision, and cool confidence!

COMPACT DURABLE - 52mm stainless steel clamp fits tight spaces with industrial strength.
COOL UNDER PRESSURE - Advanced air cooling with rear fan ensures long, quiet operation.
GLOBAL VOLTAGE READY - Supports AC110V-220V for versatile, worldwide compatibility.
PRECISION POWERHOUSE - 500W motor delivers robust torque for flawless milling.
STABLE SPEED CONTROL - Pulse width modulation tech guarantees smooth, consistent RPM.

The RATTMMOTOR 500W CNC Air Cooled Spindle Motor combines a high-speed 12,000 RPM spindle with efficient air cooling and a robust 500W power output. Designed for professional CNC routers and milling machines, it features a 52mm stainless steel clamp, global voltage compatibility (AC110V-220V), and advanced pulse width speed control for stable, quiet, and long-lasting performance.

Specifications

ASIN	B07ZHFV4N5
Batteries Required?	No
Batteries included?	No
Customer Reviews	4.3 4.3 out of 5 stars (36)
Date First Available	23 Oct. 2019
Horsepower	500 Watts
Item Package Quantity	1
Item Weight	1.67 kg
Manufacturer	RTM
Material	Stainless Steel
Power Source	ac/dc
Product Dimensions	5.6 x 19.9 x 0.01 cm; 1.67 kg
Speed	12000 RPM
Voltage	220 Volts

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