Question 1

Where is the transformer?  Thought it was to be included but we did not receive it?

Accepted Answer

Proxxon makes several power tools that use the same transformer. I’m thankful that I only need one tranformer for my tools, saves me money.

Question 2

This is a pen sander for hobbies. Why do so many negative reviewers state they used it for putty, adhesives, etc., not lightly sanding just wood?

Accepted Answer

In my projects I'll fill with sparkle and plastic wood. I also use epoxy sculp to build on the material. The pen sander is for fine detail work not quick reduction.
Why the negative reviews?  There's a size gap between small power sanders and the Proxxon line. There were time I encountered details that were too small for a palm sander had to be laboriously sanded by hand. The Proxxon sander can sand most of this areas. However, the sanding pads aren't that aggressive. They also wear out with use. The ones I use are 180 grit compared to 100 on a palm sander. The area of the sanding pad isn't that large. Say the end of my little finger compared to a quarter sheet of sandpaper. I own to thinking I could sand the same way as I did with a palm sander. 
To speed things up I take standard press on sandpaper pads and cutout pieces to fit the small pads. That speeds things up. However, heat buildup cause the adhesive to weaken.
In brief, you use the sander as it's designed. It won't reduce large areas quickly. It will get into detailed areas. It will give you clean edges and a very smooth surface.

Question 3

can i used it for porting and polishing metals such as cylinder heads and  tune pifes in motorcycles? thanks wil appeciate it....

Accepted Answer

sure, but it  will take a while. its has a small head for fine detail ,I use it for really tight hard to reach areas when I carve wood, for larger areas I use different tools,

Question 4

Are the ends metal or plastic?

Accepted Answer

The ends are in plastic

ASIN	B000NDGUXU
Amperage Capacity	1 A
Battery Description	12-18V AC adapter
Best Sellers Rank	#331,263 in Tools & Home Improvement ( See Top 100 in Tools & Home Improvement ) #247 in Power Random Orbit Sanders
Brand Name	PROXXON
Customer Reviews	4.0 4.0 out of 5 stars (970)
Global Trade Identification Number	04006274285941
Grit Number	1
Grit Type	Super Fine
Item Dimensions L x W x H	6.5"L x 1.18"W x 11.42"H
Item Type Name	Pen Sander PS 13, 12 Volt
Item Weight	10.08 ounces
Manufacturer	Proxxon
Manufacturer Part Number	28594
Manufacturer Warranty Description	Limited Warranty of Proxxon Power Tools for home use. Prox-Tech, 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 condition impl…
Maximum Rotational Speed	20000 rpm
Model Number	28594
Number of Items	1
Power Source	Corded Electric
Shape	Pen-like
UPC	006274285945 787721687511 720698782575 785533577075
Unit Count	1 Count
Voltage	12 volts

Proxxon 28594 PS 13 Corded 12-Volt Pen Sander

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