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 12-Volt Micromot 60 EF Rotary Tool with Quick-Action Chuck

Proxxon 28512 12-Volt Micromot 60 EF Rotary Tool with Quick-Action Chuck

Product ID: 4230942

Details

Brand
PROXXON
Color
Green
Power Source
Corded
Recommended Uses For Product
Cutting
Voltage
12 volts

⚡12V low-voltage power for safety & efficiency

🔄5,000-20,000 RPM variable speed with feedback

🔧Quick-action keyless chuck fits 1/32"–1/8" shafts

MX$3229

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Description

🔧 Master every micro-detail with Proxxon’s precision powerhouse!

BUILT TO LAST - Durable glass-fiber reinforced polyamide housing with soft grip combines toughness with comfort for long-term use.
POWER MEETS SILENCE - Special balanced low-noise DC motor delivers vibration-free operation with extended lifespan.
SPEED TAILORED TO YOU - Electronic speed adjustment with feedback effect lets you dial in perfect RPM for every material and task.
VERSATILITY UNLEASHED - Compatible with a wide range of shaft diameters and materials—from steel to precious stones—ideal for pros and hobbyists alike.
PRECISION IN YOUR PALM - Slim, lightweight design (230g) ensures fatigue-free, ergonomic control for detailed craftsmanship.

The Proxxon 28512 Micromot 60 EF is a lightweight, ergonomically designed 12V rotary tool featuring a quiet, balanced DC motor with variable speeds from 5,000 to 20,000 RPM. Its quick-action keyless chuck accommodates shaft sizes from 1/32" to 1/8", making it perfect for precision tasks like milling, engraving, and polishing across diverse materials. Built with durable glass-fiber reinforced polyamide housing and a soft handle, it offers professional-grade control and longevity for model makers, jewelers, and artisans.

Specifications

ASIN	B000S5KO3K
Best Sellers Rank	#419,146 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #393 in Power Rotary Tools
Brand Name	PROXXON
Color	Green
Customer Reviews	4.5 4.5 out of 5 stars (723)
Global Trade Identification Number	04006274285125
Included Components	bare-tool
Item Dimensions	11.42 x 6.5 x 1.57 inches
Item Type Name	Rotary Tool MICROMOT 50 EF, 12 volt
Item Weight	12.64 ounces
Manufacturer	Proxxon
Manufacturer Part Number	28512
Manufacturer Warranty Description	Limited Warranty of PROXXON Power Tools for home and hobby use. PROXXON Inc. warrants to the original purchaser only that all PROXXON consumer power tools will be free from defects in material or workmanship for a period of two years from the date of purchase. Seller's sole obligation and your exclusive remedy under this limited warranty and, to the extent permitted by law, any warranty or conditi…
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
Power Source	Corded Electric
Recommended Uses For Product	Cutting, Engraving, Grinding, Polishing
Style Name	Green
UPC	785533786873
Voltage	12 volts

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Our prices include the product cost, international shipping, import duties, customs clearance, and local delivery charges. We handle all customs and import procedures, ensuring there are no hidden fees upon delivery. PRO members receive additional benefits including free shipping.

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MX$3229

Duties & taxes included

In stock

Sold byAmazon MexicoDelivered 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 Mexico.

Secure transaction

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TrustScore 4.5 | 7,300+ reviews

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