8 of 9 people found the following review helpful
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This review is from: Dremel 8200 10.8V Cordless Rotary Tool plus 1 Attachment and 35 Accessories (DIY & Tools)
I bought this specifically to help get a couple of quite deep scratches in the sapphire glass in a very expensive watch. A couple of jewellers I went to wouldn't touch it, they said it couldn't be done as sapphire glass is almost as hard as diamond, and it should be sent back to the manufacturer in Geneva for a replacement crystal at great expense.
After doing some research on the web I read it could just about be done with a few different grades of industrial diamond lapping paste and a lot of rubbing. So I bought several grades of diamond paste from ebay and rubbed, and rubbed and rubbed with a piece of leather and the paste. But nothing much happened. I thought the paste must be very poor and ineffective.
As a last resort I decided to buy this Dremel to tackle the job in conjunction with the diamond paste. After a lot of trial and error on a broken practice watch, I found the best bit for the job was a pointed felt bit. At first I thought nothing was happening but little by little using the dremel at 10-20,000 rpm and 30 micron, then 7 micron then 1 micron diamond paste, the scratches were worn down and now you would never know there was ever scratches there. Totally amazing. It took a lot of work though, around 10 sessions.
Totally satisfied with the Dremel. It's my first power tool ever and now I am wondering around the house seeing what else I can do with it!
You MUST get a spare battery for it though, it's a pain having to wait an hour for the battery to recharge. A fully charged battery will last around 20 mins to half an hour with intensive work.
If you want to polish metal or glass, order more felt bits. Brilliant.