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

🔋12V low voltage for safety & coolant use

⚙️5,000-20,000 RPM variable speed

🛠️Keyless quick-action chuck

$113.20

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Description

⚡ Master every detail with precision power in your palm!

VERSATILE POWERHOUSE - Handles drilling, milling, engraving, polishing, and more on steel, glass, ceramics, plastics, and precious metals.
PLUG PLAY FLEXIBILITY - Keyless chuck fits attachments from 1/8" to 5mm, eliminating collet hassles and speeding up your workflow.
WHISPER QUIET EFFICIENCY - Permanent magnet motor ensures vibration-free, quiet operation so you can focus on your craft without distractions.
SAFE COOL UNDER PRESSURE - Low 12V safety voltage and efficient cooling system enable wet grinding and cutting with confidence.
PRECISION AT YOUR FINGERTIPS - Ergonomic pen-style design with just 35mm diameter for ultimate control and comfort during extended use.

The Proxxon 28512 MicroMOT 60/EF is a lightweight, ergonomically designed rotary tool offering variable speeds from 5,000 to 20,000 RPM. Powered by a quiet, vibration-free 12V permanent magnet motor, it features a keyless quick-action chuck compatible with a wide range of attachments. Ideal for professionals and hobbyists alike, it excels in drilling, milling, engraving, polishing, and cutting across diverse materials including steel, glass, ceramics, and precious metals. Its low voltage design ensures safety and supports wet applications, making it a versatile, precision tool for detailed craftsmanship.

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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