Look from end fan side，the rotation is cw or ccw?

Fan side is CCW. But side is CW

Do you need a seperate power supply for a sainsmart 4040 pro?

Yes, you would need a separate power supply.

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RATTMMOTOR 12-48VDC 300 Watt Spindle Motor ER16 Collet, 52mm, 400mN.m, 300W Air Cooled Spindle Motor 12000RPM for CNC Engraver Router Milling Machine

Product ID: 459903792

Details

Brand
RATTMMOTOR
Horsepower
300 Watts
Product dimensions
5.2W x 17.5H
Speed
12000 RPM
Voltage
48 Volts (DC)

⚡300W high power output

🎯Ultra-precise 0.01-0.03mm runout

🔄Up to 12,000 RPM speed

Description

⚙️ Elevate your CNC game with precision power that never quits!

SPEED DEMON - Idling speed maxes out at 12,000 RPM for ultra-smooth milling and engraving.
ROBUST RELIABLE - Air-cooled design keeps the motor running cool under pressure, extending tool life.
PRECISION ENGINEERING - Spindle radial runout as low as 0.01mm ensures razor-sharp accuracy on every cut.
POWERHOUSE PERFORMANCE - 300W motor delivers consistent, high-efficiency power for demanding CNC tasks.
VERSATILE VOLTAGE RANGE - Operates seamlessly between 12-48VDC, adapting to your custom setups.

The RATTMMOTOR 300W air-cooled spindle motor features a 52mm diameter and ER16 collet, delivering up to 12,000 RPM and 400mN.m torque. With an ultra-precise spindle radial runout of 0.01-0.03mm and a flexible 12-48VDC operating voltage, it’s engineered for high-accuracy CNC engraving, routing, and milling applications.

Specifications

ASIN	B09Y3ZFTC1
ASIN	B09Y3ZFTC1
Brand Name	RATTMMOTOR
Customer Reviews	4.2 4.2 out of 5 stars (28)
Customer reviews	4.2 4.2 out of 5 stars (28)
Date First Available	10 August 2022
Horsepower	300 Watts
Item Dimensions W x H	5.2W x 17.5H centimeters
Item model number	RTMER16
Manufacturer	RTM
Manufacturer	RTM
Material Type	Metal
Model	RTMER16
Part Number	RTMER16
Product Dimensions	5.21 x 5.21 x 17.5 cm; 862 g
Speed	12000 RPM
Voltage	48 Volts (DC)
Wattage	300 watts

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