where is the on-off switch?

The on-off is incorporated into the speed dial. Turn it and it clicks "on" and turn it further the speed will go up. Turn it the other direction and the speed will reduce and turned further will switch off.

Is there a replacement battery available and if so at what price?

This model don't use any batteries. You must have a special adapter (also from Proxxon) from 220 or 120 V to 12 V.

Can I use a universal 12V adaptor or I have to buy Proxxon brand? Is any power supply included?

I have not experimented with other power supplies, I can tell you the Proxxon power supply is 12 volt DC / 2 amp output.I can't tell you how much of that 2 amps the rotary tool uses under normal use. The label on my model 50E rotary tool states 18 volts DC max. and 40 watt power max.Other than being lighter and easier to handle for delicate work, a Dremel tool is what I use most of the time.

Is power supply is sold separately ?

Yes, you will need to purchase a Proxxon power supply. Either a 38706 Proxxon NG 2/S or 38704 Proxxon NG 5/E. You must use a Proxxon brand power supply otherwise the speed control not work.

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Proxxon 28512 Drilling and Milling Machine MicroMOT 60 / EF

Proxxon 28512 Drilling and Milling Machine MicroMOT 60 / EF

Product ID: 48873217

Details

Brand
PROXXON
Colour
Green
Power source
Corded
Recommended uses for product
Engraving
Voltage
12 Volts

🔋Low 12V safety voltage

⚙️5,000-20,000 RPM variable speed

🛠️Lightweight 230g ergonomic design

35.30 OMR

Duties & taxes included

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Description

⚡ Master every detail with power, precision, and safety in one sleek tool!

VERSATILE MASTERY - Perfect for drilling, milling, engraving, polishing, and more on steel, glass, ceramics, and precious metals.
POWER MEETS SAFETY - Operates at a low 12V DC voltage ensuring safe use even with wet grinding and cutting.
SPEED TAILORED TO YOU - Electronic speed control with feedback effect offers high torque even at low RPMs for flawless precision.
SMOOTH SILENT OPERATION - Permanent magnet motor delivers vibration-free, quiet performance for extended creative sessions.
PRECISION AT YOUR FINGERTIPS - Ergonomic pen-style design for ultimate control and comfort during intricate tasks.

The Proxxon 28512 MicroMOT 60/EF is a lightweight, high-precision rotary tool designed for professionals and hobbyists alike. Featuring a variable speed range of 5,000 to 20,000 RPM, low 12V safety voltage, and an ergonomic pen-style design, it excels in drilling, milling, engraving, and polishing across diverse materials including steel, glass, and precious metals. Its quiet, vibration-free motor and electronic speed control make it ideal for detailed, extended use in demanding environments.

Specifications

ASIN	B000S5KO3K
Best Sellers Rank	227,822 in DIY & Tools ( See Top 100 in DIY & Tools ) 276 in Rotary Tools
Brand	PROXXON
Colour	Green
Country of Origin	Germany
Customer Reviews	4.6 4.6 out of 5 stars (719)
Global Trade Identification Number	04006274285125
Included Components	multitool
Item Dimensions	29 x 16.5 x 4 centimetres
Item Type Name	Rotary Tool MICROMOT 50 EF, 12 volt
Item Weight	358 g
Manufacturer	Proxxon
Maximum Rotational Speed	20000 RPM
Minimum Speed	5000 RPM
Model Number	28512
Number of Batteries	1 Unknown batteries required.
Number of Items	1
Other Special Features of the Product	Keyless Chuck, Lightweight, Variable Speed
Part Number	28512
Power source	Corded Electric
Recommended Uses For Product	Engraving, Cutting, Grinding, Polishing
Style	Tool
UPC	785533786873
Voltage	12 Volts

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